201701001

CLG835H
WHEEL LOADER

SERVICE MANUAL

Applicable type and model: CLG835H PERKINS Engine 1204F-E44AT/ LIUGONG Wet Axle/ ZF
4WG158 Gearbox
January 24, 2017 Contents
CLG835H

Contents
General Information ........................................................................................................1-1
Power System ..................................................................................................................2-1
Power Train System ........................................................................................................3-1
Hydraulic System ............................................................................................................4-1
Air Conditioning System.................................................................................................5-1
Driver's Cab System........................................................................................................6-1
Structure...........................................................................................................................7-1
Electrical System.............................................................................................................8-1
Appendix ..........................................................................................................................9-1
Contents January 24, 2017
CLG835H
 1-1
January 24, 2017 General Information
CLG835H

General Information
How to Use the Manual ...................................................................................................1-3
Safety description ...........................................................................................................1-4
Identification of Complete Machine and System..........................................................1-5
Engine Identification .......................................................................................................1-6
Cable Code Identification ...............................................................................................1-8
Coating Materials...........................................................................................................1-10
Weight Table ..................................................................................................................1-12
Unit conversion table ....................................................................................................1-14
Standard Torque Table .................................................................................................1-15
Oils use specifications..................................................................................................1-18
Technical specification of the complete machine......................................................1-22
Technical parameter table of complete machine .................................................................................1-27
1-2
General Information January 24, 2017
CLG835H
 1-3
January 24, 2017 How to Use the Manual
CLG835H

How to Use the Manual ● Some accessories and optional parts in the
Manual may not be transported to relevant
areas, and consult your local LiuGong dealer
This manual is written for an experienced techni- if required.
cian. Essential tools required in performing cer-
tain service work are identified in this manual ● The materials and technical specifications in
and are recommended for use. the Manual are changed with variation of
products, and all information, diagrams and
This is the safety-alert symbol. When specifications in the Manual are the latest
you see this symbol on the machine product information obtained at the time of
or in this manual , be alert to the publication. The company reserves the right
potential for person injury. to make modification without any notice. If it
needs to obtain the latest technical informa-
Technical manuals are divided in several parts : tion, please consult the dealer of LiuGong in
repair and test . Repair sections tell how to repair local area or Service Department of LiuGong
the components. Tests sections help you identify Wheel Loader Marketing Co., Ltd.
the majority of routine failures quickly.
Information is organized in groups for the various
components requiring service instruction. At the
beginning of each group are summary listings of
all applicable essential tools, service equipment
and tools, other materials needed to do the job,
service part kit , specifications ,wear tolerances,
and torque values.
Technical Manuals are concise guides for spe-
cific machines. They are on-the-job containing
only the vital information needed for diagnosis,
analysis, testing, and repair .
Fundamental service information is available
from other sources covering basic theory of oper-
ation, fundamentals of troubleshooting, general
maintenance, and basic type of failures and their
causes.

Other reference manuals

● Parts manual
● Use and maintenance manual
● Cummins engine parts manual
● Cummins engine overhaul manual
● ZF axle case overhaul manual

User's Guidance

● Because the influences to the machine from

area or processing are different, it shall con-
firm which machine is applicable, and what
work implements it has.
1-4
Important Safety Information January 24, 2017
CLG835H

Important Safety Information

Most accidents involving product operation, LiuGong cannot anticipate every possible cir-
maintenance and repair are caused by failure to cumstance that might involve a potential hazard.
observe safety rules or precautions. An accident The warnings in this publication and on the prod-
can often be avoided by recognizing potentially uct are therefore not all inclusive. If a tool, proce-
hazardous situations before an accident occurs. dure, work method or operating technique not
A person must be alert to potential hazards. This specifically recommended by LiuGong is used,
person should also have the necessary training, you must satisfy yourself that it is safe for you
skills and tools to perform these functions prop- and others. You should also ensure that the
erly. product will not be damaged or made unsafe by
the operation, lubrication, maintenance or
Improper operation, lubrication, maintenance or
require procedures you choose.
repair on this product can be dangerous and
could result in injury or death. The information, specification, and illustrations in
this publication are on the basis of information
Do not operate or perform any lubrication, main-
available at the time when it was written. The
tenance or repair on this product, until you have
specification, torques, pressures, measure-
read and understood the operation, lubrication,
ments, adjustments, illustrations, and other items
maintain and repair information.
can change at any time. These changes can
Safety precautions and warnings are provided in affect the service given to the product. Obtain the
this manual and on the product. If these hazard complete and most current information before
warnings are not heeded, bodily injury or death starting any job. LiuGong has the most current
could occur to you or other persons. information available.
The hazards are identified by the "Safety Alert CALIFORNIA PROPOSITION 65
Symbol" and followed by a "Signal Word" such
as "WARNING" as shown following. Diesel engine exhaust and some of its constitu-
ents are known to the state of California to cause
cancer, birth defects and other reproductive
harm.

The meaning of this safety alert symbol is as fol- Battery post, terminal and related accessories
lows: contain lead and lead compounds, Always wash
hands after handling.
Attention. Be alert. Your safety is involved.
The message that appears under the warning,
explaining the hazard, can be either written or
pictorially presented.
Operations that may cause product damage are
identified by NOTICE labels on the product and
in this publication.
 1-5
January 24, 2017 Manual Identification
CLG835H

Manual Identification

IMPORTANT: Use only supporting manuals When necessary, product serial numbers and
designed for your specific machine. If incorrect engine model numbers are listed on the front
manual is chosen, improper service may occur. covers of loader manuals. These numbers are
Verify product identification number (PIN) and used to identify the correct supporting manual for
engine model number when choosing the correct your machine.
manual.
Product Serial Number Identification
Choosing the Correct Supporting Manuals
The product identification number (PIN) plate is
LiuGong wheel loaders are available in different located on left side of machine front frame under
machine configurations based on the various the pin of boom . Each machine has a 17- char-
markets into which they are sold. Different sup- acter PIN or shown on this plate and under this
porting manuals exist for different machine con- plate, The last 6 characters of the PIN represent
figurations. the machine's product serial number.
Figure 1 PIN Plate Location

P11000001
1-6
Engine Identification January 24, 2017
CLG835H

Figure 2 Pin Plate (17-character with CE mark)

P11000002

Engine Identification

The engine serial number plate is located on the right side of engine model 1204F. Each engine has two
engine numbers (LIST NO. and SERIAL NO.) shown on this plate.

Engine Emission Level Identification

EMISSION CONTROL INFORMATION: In the U.S., this engine is solely for export and is therefore
exempt under 40 CFR 1068.230 from emission standards and related requirements. Outside the U.S.,
the engine may be subject to other emission regulations.
 1-7
January 24, 2017 Engine Identification
CLG835H

Figure 3 Engine Serial Number Plate Location

P11000003
Figure 4 Engine Serial Number Plate

P11000004
1-8
Cable Code Identification January 24, 2017
CLG835H

Cable Code Identification

The wire in circuit diagram is marked in combination with wire No., wire categories, color abbreviation
codes and wire gauge for maintenance. For example:

P28E00002

Wire No.

Wire No. is digital code for marking wire with three Arabic numbers in accordance with certain rules.

Wire categories

The wire categories selected for engineering machinery are AEX, AV, AVS, AVSS, and QVR in general.
For applicable range of ambient temperature of various wires, see following table.

Heat resis-
S/N Wire type Wire name Description
tance
70 °C (158°F) heat-resisting, cop-
1 QVR Low-voltage wire for road vehicles ≤ 70°C(158°F)
per core PVC-insulated
Thin-wall insulated low-voltage wire The thickness of insulation layer
2 AVSS ≤ 80°C(176°F)
for vehicles is 0.30~0.40mm
Thin-wall insulated low-voltage wire The thickness of insulation layer
3 AVS ≤ 80°C(176°F)
for vehicles is 0.50~0.70mm
The thickness of insulation layer
4 AV Insulated low voltage wire for vehicles ≤ 80°C(176°F)
is 0.60~2.0mm
Heat-resisting low voltage wire for Heat resistance and cross-linking
5 AEX ≤ 110°C(230°F)
vehicles polyethylene

Color abbreviation codes

Color English Abbreviation Color English Abbreviation

Black BLACK BK Blue BLUE BU
Grey GREY GY Green GREEN GN
Red RED RD Yellow YELLOW YL
Brown BROWN BR Pink PINK PK
 1-9
January 24, 2017 Cable Code Identification
CLG835H

Color English Abbreviation Color English Abbreviation

Violet VIOLET VT Orange ORANGE OR
White WHITE WH Light blue LIGHT BLUE LTBU
Red/green RED/GREEN RD/GN Yellow/blue YELLOW/BLUE YL/BU
Remarks: The code composed of 2 colors indicates double-color wire
For example: "RD/GN" shows red-green wire.

Wire specifications

Allowable current and voltage drop of AV wire, and approximate performances of AVS, AVSS, and QVR
shall be executed uniformly according to the following table.

Ambient temperature 30°C(86°F) 40°C(104°F) 50°C(122°F) 60°C(140°F) 70°C(158°F)

Allowable current/
A mV/m A mV/m A mV/m A mV/m A mV/m
voltage drop
0.85 18 463 16 412 14 360 11 283 8 206
1.25 23 407 21 372 18 319 14 248 10 177
2 31 338 28 305 24 262 20 218 14 153
3 42 291 38 263 33 228 27 187 19 132
5 57 248 51 222 44 192 36 157 25 109
8 74 213 66 190 57 164 47 135 33 95
Nominal 15 103 176 92 157 30 137 65 111 46 79
sectional
area(mm2) 20 135 148 121 133 105 116 85 94 60 66
30 188 121 168 108 146 94 119 77 84 54
40 210 112 188 110 163 87 133 71 94 50
50 246 103 220 92 190 60 155 65 110 46
60 272 97 243 87 211 75 172 62 121 43
85 335 90 300 80 260 70 212 57 150 40
100 399 83 356 74 309 65 252 53 178 37

Circuit type and color abbreviation code

For general corresponding rules between circuit type and wire color, see the following table.

Circuit type Color abbreviation codes

Power line OR, RD
Signal line WH
Earthing BK, GY
Communication line RD/GN, YU/BU
1-10
Coating Materials January 24, 2017
CLG835H

Coating Materials

Name Specification Main features and purposes

1277 Thread locker seal- ● Features: anaerobic and fast air drying
1277
ants ● Purposes: used for parts not frequently removed
1243 Thread locking seal-
1243 Used for removable parts (speed sensor in general)
ant
● Features: rust protection for a long time
Long-term anti-rust agent LONG#2 light yellow ● Purposes: used for mounting face of pump, sensor,
hydraulic fitting, etc
Efficient cleaning agent ● Features: strong ability of cleaning
1755
1755 ● Purposes: used for pump and motor
● Feature: it has features of high-temperature resistance, self-
lubrication and medium resistance and is used for medium
Anaerobic pipe thread
1567 (sealing oil, air, vapor, water) pipeline cone/taper thread
sealant
● Purposes: used for water temperature sensor and oil
pressure sensor
Cleaning agent for electro-
HD-10 Used for cleaning oil pipe connectors, etc.
mechanical equipment
Diesel engine sealant 1515 Used for mounting face of diesel engine flange
Polyurethane sealant 1924 Used for waterproof of start motor and assembling clearance
Mobilux EP None Used for rust protection of rear cover hinge

Paint standard:

There are two main kinds of colors that applied to 835H:

Yellow: matte (50%) RAL1006 yellow
Grey: matte (40%) RAL7021 grey
The standard of paint quality is as follows (for more information, see QJ/LG 08.44-2013):

S/N Items Indicator Testing method Remarks

Paint film shall be uniform Refer to the require-
Paint film
color, and no blistering, crack, ments at all levels of
1 appear- Visual check
wrinkle, under screen, rust, surface for details of
ance
damage, dirt and so on allowable defects
For details, see the
requirements at all lev-
Meet the minimum require-
Paint film els of surface. For
2 ments of paint film gloss at all Visual/gloss meter
gloss matte paint, refer to
levels of surface
the special require-
ments
Meet the minimum require- For details, please see
Paint film
3 ments of paint film thickness at Thickness gauge of paint film the requirements at all
thickness
all levels of surface levels of surface
 1-11
January 24, 2017 Coating Materials
CLG835H

S/N Items Indicator Testing method Remarks

Use single cutting edge or scriber to
perform the cross cut on the paint film Approval standard: No
with five horizontal and vertical lines. the whole piece of grid
Adhesion
Good adhesion and no peeling The distance between the scribing lines film drops. (Little film
4 of paint
in detection of paint film is 1 mm~1.5 mm and the depth can drop around the scrib-
film
reach the steel plate substrate. Then ing lines can be allow-
stick the transparent adhesive tape and able.)
compact, then tear off the tape
For details, please see
Color dif- Meet color difference require-
5 Visual check/Color difference meter the requirements at all
ference ments at all levels of surface
levels of surface
There is no paint contamina-
6 Shield tion, mechanical impurity, rust Visual check
and dirts
The decal should be correct,
7 Decal complete, decorous, firm, Visual check
smooth and no popping
1-12
Weight Table January 24, 2017
CLG835H

Weight Table
The following table indicates the reference value of the weight of each component. When using the lifting
equipment , please refer to the following table to select the sling.

Component Weight (kg)

Engine 571kg\ 1259 lb
Radiator 285 kg \ 628 lb
Fuel tank 122 kg\ 269 lb
Front axle assembly 788 kg\ 1738 lb
Rear axle assembly 779 kg\ 1718 lb
Tire rim 295 kg\ 650 lb
Drive shaft 83 kg\ 183 lb
Gearbox & torque converter assembly (oil bearing) 510 kg\ 1125 lb
Cab 685 kg\ 1510 lb
Seats 29 kg\ 64 lb
Engine hood as 210 kg\ 463 lb
Left rear fender 27 kg\ 60 lb
Right rear fender 30 kg\ 66 lb
Air conditioner 100 kg\ 221 lb
Steering pump 34 kg\ 75 lb
Control valve 45 kg\ 99 lb
Fan drive motor 12 kg\ 26 lb
Hydraulic oil tank 130 kg\ 287 lb
Boom cylinder assembly (single) 122 kg\ 269 lb
Bucket tilting cylinder assembly 124 kg\ 283 lb
Secondary steering pump 20 kg \ 44 lb
Ride control accumulator 41 kg\ 90 lb
Rocker arm 138 kg\ 304 lb
Boom 662 kg\ 1460 lb
Front frame 942 kg\ 2077 lb
Rear frame 882 kg\ 1945 lb
Battery box-lh 71 kg\ 157 lb
Battery box-rh 71 kg\ 157 lb
Counterweight 152 kg\ 335 lb
Work implement 880 kg\ 1940 lb
Linkage 34 kg\ 75 lb
Quick coupler frame 267 kg\ 589 lb
Quick Coupler Bucket 734 kg\ 1618 lb
Tooth 190 kg\ 419 lb
Movable blade(*6) 15 kg\ 33 lb
Battery(*2) 18 kg\ 40 lb
 1-13
January 24, 2017 Unit Conversion Table
CLG835H

Unit Conversion Table

The Manual uses ISO International System of Units, and ISO international units are converted into Brit-
ish units as shown in following figure:

Parameters Metric unit British unit Multiple

mm In 0.03937
Length
mm ft 0.003281
L US gal 0.2642
Capacity L US qt 1.057
m³ Yd3 1.308
Weight kg lb 2.205
N kgf 0.10197
Intensity
N lbf 0.2248
Nm kgf·m 0.10197
Torque
Nm lbf·ft 0.7375
MPa 3 10.197
kgf/cm
Pressure
MPa psi 145.0
kW PS 1.360
Power
kW HP 1.341
Temperature °C °F °C ×1.8+32
km/h mph 0.6214
Speed
min-1 rpm 1.0
L/min US gpm 0.2642
Flow
mL/rev cc/rev 1.0
1-14
Standard Torque Table January 24, 2017
CLG835H

Standard Torque Table

TORQUE SPECIFICATIONS – METRIC HARDWARE

Use the following torques when specifications are not given.

These values apply to fasteners with coarse threads as received from supplier, plated or unplated, or
when lubricated with engine oil, These values do not apply if graphite or Moly disulfide grease or oil is
used.

Grade 8.8 Bolts , Nuts , and Studs

Size N.m \ lbf·ft
M6 7.7±1.1 N.m \ 5.67±0.81 lbf·ft
M8 19±2.9 N.m \ 14.01±2.13 lbf·ft
M10 72±6 N.m \ 53±4 lbf·ft
M12 120±10 N.m \ 89±7 lbf·ft
M14 195±15 N.m \ 144±11 lbf·ft
M16 305±25 N.m \ 225±18 lbf·ft
M18 415±35 N.m \ 306±26 lbf·ft
M20 600±50 N.m \ 443±37 lbf·ft
M22 800±70 N.m \ 590±52 lbf·ft
M24 1020±100 N.m \ 752±74 lbf·ft
M27 1500±100 N.m \ 1106±77 lbf·ft
M30 1850±150 N.m \ 1364±111 lbf·ft
M33 2900±400 N.m \ 2139±295 lbf·ft
M36 3100±250 N.m \ 2286±184 lbf·ft

Grade 10.9 /12.9 Bolts , Nuts , and Studs

Size N.m
M10 72±6 N.m\ 53±4 lbf·ft
M12 120±10 N.m\ 89±7 lbf·ft
M14 195±15 N.m\ 144±11 lbf·ft
M16 305±25 N.m\ 225±18 lbf·ft
M18 415±35 N.m\ 306±26 lbf·ft
M20 600±50 N.m\ 443±37 lbf·ft
M22 800±70 N.m\ 590±52 lbf·ft
M24 1020±100 N.m\ 752±74 lbf·ft
M27 1500±100 N.m\ 1106±77 lbf·ft
M30 1850±150 N.m\ 1364±111 lbf·ft
M33 2900±400 N.m\ 2139±295 lbf·ft
M36 3100±250 N.m\ 2286±184 lbf·ft
 1-15
January 24, 2017 Standard Torque Table
CLG835H

Tightening torque of 24° cone O-ring sealed hose connector

Hose inner diame- Tightening torque

Series Thread size
ter mm N.m kgf.m
M12×1.5 5 16±1 1.6±0.1
M14×1.5 6.3 16±1 1.6±0.1
M16×1.5 8 26±2 2.7±0.2
M18×1.5 10 37±2 3.8±0.2
M22×1.5 12.5 47±2 4.8±0.2
Light-type
M26×1.5 16 89±4 9.1 ±0.4
M30×2 19 116±5 11.8±0.5
M36×2 25 137±6 14.0±0.6
M45×2 31.5 226±11 23.1±1.1
M52×2 38 347±16 35.4±1.6
M14×1.5 5 26±2 2.7±0.2
M16×1.5 6.3 42±2 4.3±0.2
M18×1.5 6.3 53±2 5.4±0.2
M20×1.5 8 63±3 6.4±0.3
M22×1.5 10 79±4 8.1 ±0.4
Heavy type
M24×1.5 12.5 84±4 8.6±0.4
M30×2 16 126±6 12.9±0.6
M36×2 19 179±8 18.3±0.8
M42×2 25 263±12 26.8±1.2
M52×2 31.5 368±17 37.6±1.7

Tightening torque of flange-type sealed hose connector bolt

Bolt performance Tightening torque

Series Bolt
level N.m kgf.m
M8 25.2±1.2 2.57±0.12
M10 52.5±2.5 5.35±0.25
8.8
M12 96.6±4.6 9.85±0.47
M16 220±10 22.5±1.07
Light-type
M8 33.6±1.6 3.42±0.16
M10 73.5±3.5 7.5±0.35
10.9
M12 136±6 12.8±0.6
M16 310±15 31.6±1.5
1-16
Standard Torque Table January 24, 2017
CLG835H

Bolt performance Tightening torque

Series Bolt
level N.m kgf.m
M8 25.2±1.2 2.57±0.12
M10 52.5±2.5 5.35±0.25
M12 8.8 96.6±4.6 9.85±0.47
M16 220±10 22.5±1.07
M20 420±20 42.8±2.0
Heavy type
M8 33.6±1.6 3.42±0.16
M10 73.5±3.5 7.5±0.35
M12 10.9 136±6 12.8±0.6
M16 310±15 31.6±1.5
M20 577±27 58.9±2.8

Tightening torque of thread angle type sealed hose connector

Material of fasten-
Carbon steel, alloy steel Aluminum product
ings
Tightening torque Tightening torque
Thread size
N.m kgf.m N.m kgf.m
G1/8 8.75±1.25 0.90±0.12 / /
G1/4 36±2 3.67±0.2 29.3±2.2 3.0±0.2
G3/8 73.5±4.5 7.5±0,46 49±3 5.0±0.3
G1/2 110±10 11.2±1.0 55±5 5.6±0.5
G3/4 165±15 16.8±1.5 74±4 7.5±0.4
G1 225±25 23.0±2.55 / /
G1-1/4 275±25 28.0±2.55 / /
G1-1/2 285±15 29.1±1.5 / /
 1-17
January 24, 2017 Oils use specifications
CLG835H

Connector tightening torque

Tightening torque
Thread size
N.m kgf.m
M12 24±2 2.4±0.2
M14 30±2 3.1±0.2
M16 30±2 3.1±0.2
M18 30±2 3.1±0.2

Oils use specifications

Fluids and lubricants for CLG835H-T4F

Category Name Capacity Application parts Remarks

≥-10°C(14°F) ★ SAE 15W/40 CJ-4 12L\
Engine oil Diesel engine
≤-10°C(14°F) SAE 5W/40 CJ-4 3 US gal

Engine ≥-10°C(14°F) ★ 10# Ultra low sulfur diesel 190L\

Diesel engine
fuel ≤-10°C(14°F) 35# Ultra low sulfur diesel 50 US gal
19L\
Adblue ★ RD-11 Diesel engine def tank
5 US gal
-15~40°C(5~104°F) ★ HM-46 Anti-wear hydraulic oil
Hydraulic 120L\ Work hydraulic system,
oil -25~40°C(- HV-46 low-temperature anti- 32 US gal steering hydraulic system
13~104°F) wear hydraulic oil

Torque ★ SAE 15W-40 Mobil Delvac

≥-10°C(14°F) 40L\ Torque converter and
converter 1300
11 US gal power shift gearbox
oil ≤-10°C(14°F) S4 TXM 10W-30
★ SAE 80W-90/LS Heavy-load
≥-10°C(14°F)
wheel gear oil 34L\ Front and rear axle bevel LiuGong
Gear oil
75W-90/LS Heavy-load wheel 9 US gal gear and wheel reducer bridge
≤-10°C(14°F)
gear oil
2.5Kg\
Refrigerant ★ R134a Air conditioner
5.5 lb
★ 2# Molybdenum disulfide lith- Roller bearing, slide bear-
Manual lubrication
ium grease ing, pin shaft of work
implement, pin shaft of
0# Composite lithium base
≤-10°C(14°F) 2L\ steering cylinder, pin shaft
Grease grease
1 US gal of vehicle frame, swing
frame of rear axle, spline
2# Composite lithium base
Central lubrication of drive shaft, cardan joint,
grease
and water pump shaft
22L\
Coolant ★ Shell anti-freezing solution
6 US gal
★ refers to the standard configuration
1-18
Oils use specifications January 24, 2017
CLG835H

NOTE 1 : DO NOT use an alternate oil in the axle , the transmission box ,the engine . the parts could be
damaged as a result of using an alternate oil.
NOTE 2: SEE your dealer for winter fuel requirements in your area , if the temperature of fuel below the
cloud point , will cause the engine lose power or not start.
NOTE 3: Low sulfur fuel should be used. the wrong fuel used will cause the engine damaged as a result.

Specifications for acceptable Diesel Fuel

Perkins Specification for Distillate Diesel Fuler

Property Units Requirements
Aromatics %Volume 35% maximum “ISO”3837
Ash %Weight 0.01% maximum “ISO”6245
Carbon Residue
%Weight 0.35% maximum “ISO”4262
on 10% Bottoms
Cetane Number _ 40 minimum “ISO”5165
The cloud point must not exceed the lowest
Cloud Point °C “ISO”3015
expected ambient temperature.
Copper
_ No. 3 maximum “ISO”2160
Strip Corrosion
Density at 15°C
(59°F) Kg/m3 801 minimum and 876 maximum “ISO”3675 “ISO”12185

10% at 282°C (539.6°F) maximum

Distillation °C “ISO”3405
90% at 360°C (680°F) maximum
Flash point °C Legal limit “ISO”2719
Minimum of 80% reflectance after aging for 180
Thermal Stability No equivalent test
minutes at 150°C (302°F)
6°C (42.8°F)minimum below ambient tempera-
Pour Point °C “ISO”3016
ture
Sulfur % mass 0.0015 “ISO”20846 “ISO”20884
Kinematic Viscos- The viscosity of the fuel that is delivered to the
mm2/s(cSt) “ISO”3405
ity fuel injection pump.”1.4 minimum/4.5 maximum”
Water and sedi-
%weight 0.1% maximum “ISO”
ment
Water %weight 0.1% maximum No equivalent test
Sediment %weight 0.05% maximum “ISO”3735
Gums and Resins mg/100ml 10 mg per 100 ml maximum “ISO”6246
Lubricity cor-
rected wear scar
mm 0.52 maximum “ISO”12156-1
diameter at 60°C
(140°F)
 1-19
January 24, 2017 Oils use specifications
CLG835H

MAINTENANCE SCHEDULE

FREQUENCY IN HOURS

SERVICE

LUBRICATE
INITIAL

REPLACE
CHANGE

ADJUST
SERVICE

CHECK

CLEAN

DRAIN
SERVICE POINTS
INTERVAL

Radiator Coolant Level ★

Tires ★
Hydraulic Filter ★
As Required
Air Cleaner ★ ★
Alternator , AC ,Drive Belt ★
Fire Extinguisher ★
Every 10 Hours Check Engine Oil Level 10
Check Engine Coolant Level 50
Check Transmission Oil Level 50
Every 50 Hours Check Hydraulic Oil Level 50
Grease Bucket Mounting Fittings 50
Bleed Fuel Filter of Condensation 50
Change Engine Oil and Filters 100
Replace Fuel Filters 100
First 100 Hours Change Hydraulic Filter 100
Change Transmission Oil and Filter 100
Change Oil in Axles 100
Grease Front Drive Shaft Support Bear-
100
ing
Grease Steering Cylinder Pivots (4 Fit-
Every 100 100
tings)
Hours
Grease Lift & Tilt Cylinder Pivots (6 Fit-
100
tings)
Grease Articulation Fittings 100
Check Cab Fresh Air Filter 250 ★
Check AC Return Air Filter 250 ★
Every 250 Check Radiator Coolant Level 250
Hours Check Tire Pressure & Wheel Torque 250
Check Drive Belts 250
Check Air Filter 250
Check Axle Oil Level 500
Check Battery Volt and Nuts Torque 500
Every 500
Change Engine Oil and Filter 500
Hours
Replace Fuel Water Separator 500
Replace Fuel Filter 500
1-20
Oils use specifications January 24, 2017
CLG835H

FREQUENCY IN HOURS

SERVICE

LUBRICATE
INITIAL

REPLACE
CHANGE

ADJUST
SERVICE

CHECK

CLEAN

DRAIN
SERVICE POINTS
INTERVAL

Replace Hydraulic Oil Filter 500 1000

Replace Pilot Hydraulic Oil Filter 500 1000
Change Front & Rear Axle Oil 1000
Every 1000 Replace Cab Fresh Air Filter 1000
Hours Replace AC Return Air Filter 1000
Change Transmission Oil and Filter 100 1000
Check Accumulator Nitrogen Press 500 1000
Clean Fuel Tank 100 1000
Every 2000 Change Hydraulic Oil & Filter 2000
Hours Change Coolant 2000
Note: ★ means service as required.
 1-21
January 24, 2017 Technical Specification of the Machine
CLG835H

Technical Specification of the Machine

P11000006

Application

This loader is a kind of engineering machinery

mainly used for loading & unloading loose mate-
rials. It is mainly used for loading, unloading, Do not operate machine in conditions with
bulldozing and traction operation etc. at mine rollover or falling object risk.
areas, ports and docks, capital construction, road
repair and steel & iron enterprises etc. It is a kind
of multi-purpose and high efficiency engineering
machinery.
Preventive measures for operation,
This loader is a kind of general-purpose engi- maintenance and safety rules outlined on this
neering machinery and is not suitable for the manual are only suitable for the stipulated
flammable, explosive, dusty and air poisonous applications of the machine. Do not use the
environments. machine beyond the stipulated application
scope, Guangxi LiuGong Machinery Co., Ltd
Requirements of Work Environments
will not bear any safety liability, and these
1. Altitude: ≤ 3000 m safety liabilities will be born by users. Under
any cases, do not use the forbidden
2. Environmental temperature: -15°C~40°C operation outlined in this manual.
(The cold starting Aid device is not available)
3. Water Depth: ≤ 630 mm
1-22
Technical Specification of the Machine January 24, 2017
CLG835H

Main Components

4 3
2
1

8
7 11
12
9 10 13
14 15

FRONT
19 RIGHT

16

18 17

LEFT
REAR

1. Bucket 6. Cab 11. Front frame 16. Engine hood

2. Rocker arm 7. Rear fender 12. Front fender 17. Rear combination lights
3. Bucket cylinder 8. Counterweight 13. Boom cylinder 18. Ladder
4. Front combination lights 9. Rear wheel 14. Front wheel 19. Rear work lights
5. Front work lights 10. Hydraulic oil tank 15. Boom
 1-23
January 24, 2017 Technical Specification of the Machine
CLG835H

Performance Parameters
All rated lift capacities are based on the criteria of the machine being leveled on a hard and flat ground.
When the machine is operated in conditions that deviate from these criteria (e. g. on soft or uneven
ground, on a slope or when subject to slide loads), these conditions shall be taken into account by the
operator.
The following table lists the specifications in standard collocation, please refer to the appendix of this
section for the specification change parts of the other special collocations (such as larger bucket, longer
boom, and side dump bucket).
Exterior Drawing

H
C
A
B

P
E

F D
G
L
1-24
Technical Specification of the Machine January 24, 2017
CLG835H

Machine Specifications
CLG835H T4f
NO. Item Unit
Quick coupler Pin On
1 Rated load weight kg (lb) 3000 (6615) 3000 (6615)
2 Rated power kW 97.9 97.9
3 Operating mass kg (lb) 11200 (24696) 10800 (23814)
4 Rated bucket capacity m3 1.9 1.9
5 Dumping height mm (In) 2700 (106) 2800 (110)
6 Max. breakout force (bucket tilting) kN (lbf) 85 (19108) 90.1 (20254)
7 Tipping load (aligning) kg (lb) 7700 (16979) 9452 (20842)
8 Tipping load (full steering) kg (lb) 6600 (14553) 7369 (16249)
9 Boom lifting time (full load) s 5.5 5.5
10 Total time s 9.7 9.7
11 Max. traveling speed km/h(mph) 38.6 (23.9) 38.6 (23.9)
12 Max. gradeability ° 28 28
13 Min. turning radius (outside of front wheel) mm (In) 4920 (194) 4920 (194)
Overall Dimensions
Parameters below are for Z-bar or 8-bar machine Z-bar Z-bar
1 A: Height to hinge pin, fully raised mm (In) 3720 (146) 3720 (146)
2 B: Dumping height, fully raised mm (In) 2700 (106) 2800 (110)
3 C: Dumping reach, fully raised mm (In) 1150 (45) 1076 (42)
4 D: Max. digging depth mm (In) 100 (4) 80(3)
5 E: Min. ground clearance (at articulation joint) mm (In) 325 (13) 325 (13)
F: Distance from centre of rotation to the centre of the front
6 mm (In) 1435 (56) 1435 (56)
wheels
7 G: Wheel base mm (In) 2870 (113) 2870 (113)
8 H: Overall height (top of cab) mm (In) 3200 (126) 3200 (126)
9 J: Tread width mm (In) 1855 (73) 1855 (73)
10 K: Overall width (outside of wheel) mm (In) 2450 (96) 2450 (96)
11 L: Over length (bucket on ground) mm (In) 7265 (286) 7115 (280)
12 M: Max. steering angle ° 38 38
13 W: Overall width (outside of bucket) mm (In) 2530 (100) 2530 (100)
14 R1: Turning radius (outside of bucket) mm (In) 5650 (222) 5050 (199)
15 R2: Turning radius (center of rear wheel) mm (In) 4622.5 (182) 4622.5 (182)
16 P: Departure angle ° 28 28
17 S1: Bucket tilt back angle (on ground) ° 45 45
18 S2: Bucket tilt back angle (in transport position) ° 48 48
19 S3: Bucket tilt back angle (in highest position) ° 60 60
20 S4: Dumping angle (in highest position) ° 45 45
21 T: Bucket articulation height (in transport position) mm (In) 450 (18) 450 (18)
 1-25
January 24, 2017 Technical Specification of the Machine
CLG835H

Main Components Specifications

Engine
1 Manufacturer / Perkins
2 Model / 1204F-E44TA
3 Type / Electronic fuel injection
4 Displacement L (US gal) 4.4 (1.16)
5 Rated power KW (hp) 97.9 (131.3)
6 Emission level / Tier 4f
Number of cylinders and
7 / Straight-four cylinders
arrangement
8 Intake type / Turbocharged & inter-cooling
9 Rated speed r/min 2200
10 Max. rotating speed (no-load) r/min 2376
11 Min. rotating speed (no-load) r/min 800
12 Rotating speed at max. torque r/min 1400
13 Max. torque N.m (lbf·ft) 530 (391)
14 Start motor V-Kw 24V-5.5 KW
15 Alternator V-A 24V- 70A
Power train system
1 Torque converter Type Single turbine, three members
2 Manufacturer ZF
3 Model 4WG158A
4 Type Fixed shaft type, power shift
Transmission Four forward gears and three reverse
5 Number of gears
gears
Operating pressure of shift oil pump
6 1.6~1.8MPa (232~261psi)
(gear pump)
7 Manufacturer LiuGong
8 Model LiuGong 3T wet-type axle
9 Type Wet-type alxe
Drive axle
10 Max. traction force 100kN (22480lbf)
11 Front & rear axle reduction ratio 20.2656
12 Rear axle swing angle 12°
13 Wheels Tire model 17.5-25 PR16/TL L-3
14 F1/ R1 7.1/ 7.1km/h (4.4/ 4.4mph)
15 F2/ R2 12.3/ 12.3km/h (7.6/ 7.6mph)
Traveling speed
16 F3/ R3 25.1/ 25.1km/h (15.6/ 15.6mph)
17 F4 38.6km/h (23.9/ 23.9mph)
Work hydraulic system
1 Work pump Type Piston pump
2 Work pump displacement ml/r (cc/rev) 100 (100)
1-26
Technical Specification of the Machine January 24, 2017
CLG835H

Main Components Specifications

3 System pressure Mpa (psi) 19 (2755)
4 Control valve / Three spools
5 System flow L/min (US gpm) 210 (55.48)
6 Lifting time (full load) s 5.5
7 Dumping time s 1.5
8 Float lowering time s 3.5
9 Total time s 9.7
Steering hydraulic system
1 Steering angle ° 38
2 Steering pump Type Piston pump
3 Steering pump displacement ml/r (cc/rev) Share with work pump
4 Steering system pressure Mpa (psi) 19 (2755)
5 Steering system flow L/min (US gpm) 210 (55.48)
6 Secondary steering pump Type Gear pump
Secondary steering pump
7 ml/r (cc/rev) 10 (10)
displacement
Secondary steering system
8 Mpa (psi) 16 (2320)
pressure
Secondary steering system
9 L/min (US gpm) 22-25l/min (5.8-6.6gpm) @52bar
flow
Brake hydraulic system
1 Service brake Type Full hydraulic wet type brake
2 Brake pump Type Gear pump
3 Brake pressure Mpa (psi) 6 (870)
Nitrogen pre-charge pressure
4 Mpa (psi) 5.5 (797.5)
of service brake accumulator
5 Parking brake Type Drum type parking brake
6 Parking brake control mode / Hydraulic control
Nitrogen pre-charge pressure
7 Mpa (psi) 9.2 (1334)
of parking brake accumulator
Air conditioner system
1 Type / Cooling & heating A/C
2 Heating capacity W 5800
3 Cooling capacity W 5000
4 Refrigerant Model R134a
Electrical system
1 System voltage / DC 24V

Refill capacities
1 Fuel tank L (US gal) 190 (50.2)
2 Engine oil L (US gal) 12 (3.17)
3 Cooling system L (US gal) 22 (5.8)
 1-27
January 24, 2017 Technical Specification of the Machine
CLG835H

Main Components Specifications

4 Transmission oil L (US gal) 40 (10.57)
5 Drive axle oil L (US gal) 34 (8.98)
6 Hydraulic oil L (US gal) 120 (31.7)
7 AdBlue L (US gal) 19 (5.02)
Other specifications
1 Cooling pump type / Gear pump
2 Cooling pump displacement ml/r (cc/rev) 27 (27)
3 Cooling pump flow L/min (US gpm) 59.4 (15.7)
4 Cooling motor displacement ml/r (cc/rev) 35 (35)
5 Cooling motor flow L/min (US gpm) 77 (20)
Nitrogen pre-charge pressure
6 of pilot oil supply valve Mpa (psi) 0.6 (87)
accumulator
Nitrogen pre-charge pressure
7 Mpa (psi) 2.5 (362.5)
of ride control accumulator
Note:
1. Continuing improvement and advancement are made to LiuGong products. All the specifications are the latest product
information obtainable at the time of publication. LiuGong will reserve the right to make change without notice.
2. The above parameters are the theoretical values, the tolerance ranges during testing are provided by LiuGong
standard.
1-28
Machine Inspection Table January 24, 2017
CLG835H

Machine Inspection Table

Inspec-
S/N Inspection method and acceptance criteria
tion item
Complete machine information: visual check the complete machine number for compliance with
1
description of model
Fastening bolt: visual check whether the left and right mounting bolts of front axle are tightened
2
firmly in place; visually check whether the left and right front rim bolts are firmly tightened
Fastening bolt: visual check the mounting bolts between front drive shaft and front axle, output
3
flange of transmission and middle bearing fastened;
Fastening bolt: visual check whether the emergency braking flexible shaft is connected reliably;
4
brake cylinder for oil leakage and connected reliably;
5 Fastening bolt: visual check whether mounting bolts of upper and lower hinge are tightened
Fastening bolt: visual check the left and right mounting bolts of rear axle are tightened; visually
6
check the left and right rear rim bolts are firmly tightened

Inspection 7 Water level: anti-freeze level shall be over the middle line in the level window of expansion tank
before test Oil: pull out the oil dipstick and the engine oil level shall be between the MIN and MAX marks of
8
run the dipstick, and the oil is not in white
Hydraulic oil: lay flat the bucket, lower the boom to the minimum at idling, and visual check the
9 oil level of the hydraulic oil tank is within the green scale and the oil is not in white 5 min after the
engine stalls
Transmission fluid: when the engine is idling and the transmission fluid temperature is not more
than 40 ℃ (104 ℉ ), check that the level shall be between cold fluid MAX and MIN marks. Then,
place the shift lever at four gear and depress the brake, then the accelerator to run the transmis-
10 sion for 5~8min resulting in the transmission fluid temperature reaching 100~110℃(212~230℉).
Release the accelerator and place the shift lever at neutral gear, then check that the level is
between hot oil MAX and MIN marks when the transmission fluid reaches a temperature more
than 80 ℃ (176 ℉ ).
Air-tightness: visual check each hydraulic line, cylinder, transmission, axle, oil tank, radiator, die-
11
sel engine for no leakage during inspection
1 Open and close the left and right doors of cab, and no seizing or abnormal sound should occur.
2 Shake the interior of the cab by hand and no looseness should occur
Turn on/off the dome light, radio, front and rear sunshade, cigarette lighter, and they should
3
function normally
Inflatable seat (option): the height and front & rear adjustment distance of the seat is obvious;
adjustment angle of left and right backrest armrest is obvious; move upward the handle at the
4
front of suspension, the suspension rises, otherwise goes down. There is no abnormal sound
and parts interference during air-filled detection.
Climbing up
Turning on the electric lock: turn on the front floodlight, work light, alarm light, parking light by
the cab 5
order and get off the vehicle to check if they function normally
Starting the complete machine: operate the engine speed adjustment switch and visual check
6
the corresponding change to the speed of the tachometer on the instrument panel.
Starting the complete machine: operate the switch of LCD to switch the voltage and timing dis-
7
play
8 Visual check: timer displays and record the time
Steering wheel: it can be adjusted front and rear, upper and down normally; no looseness after
9
locking. Lift the steering wheel upwards by hand and no axial runout occurs (≤3mm);
 1-29
January 24, 2017 Machine Inspection Table
CLG835H

Inspec-
S/N Inspection method and acceptance criteria
tion item
Horn: press the horn button on the lever of the horn button/control lever on the combination
Climbing up
10 lever horn button/steering wheel and listen, no abnormal sound and failure to the horn should
the cab
occur
The air volume switch, temperature setting switch, defrost setting switch, air mode switch, auto
mode switch on the A/C panel functions normally and is indicated correspondingly on the LCD;
1
the temperature, air volume, direction at the air outlet is the same with setting value on the
Air condition- panel.
ing system Self-diagnosis of A/C: press the "OFF" switch on the LCD panel, and the temperature setting
and air volume icon on the display disappears; press the up/down regulation button " " and " " on
2
the temperature setting switch "TEMP" simultaneously for more than 3 seconds. If "E-" appears
on the LCD, it indicates no failure, while "E1" appears, it indicates failures
Starting the complete machine: it starts normally, and listen to the engine and air filter, no abnor-
1 mal sound is heard, and it turns off normally without delay; observe the engine under the diesel
engine idling and top speed, and it shall not stall
Starting the complete machine: adjust the complete machine operating idle speed to a level
2
more than 950rpm and the engine does not stall with the bucket lifted
Starting the complete machine: visual check that no trouble code appears on the LCD of instru-
3 ment panel, and no indicating identification, alarm and flashing appears on the instrument panel
or normally on.
Rearview instrument system (option): when placing the shift lever at reverse, the rearview
4
instrument activates automatically and the image shall be clear
Control lever: there is no seizing and interference with other parts when operating the FNR han-
5
dle boom to rise, drop, take back and dump the bucket
Pilot shutoff function: the pilot shutoff lever is at OFF position, operate the pilot lever and the
6 work implement shall not act; the pilot shutoff lever is not installed reversely and has no interfer-
ence with housing;
Detection of bucket automatic reset: the bucket is unloaded, lift the boom to the highest position
to make the bucket under discharging state and then take back the bucket and it should stop
Driving test moving automatically and then control lever returns back to neutral position when the bucket
7
comes near to the switch and bucket limitation magnet. Then lower the boom to place the
bucket on the ground, at this time, check the bucket and it should be horizontal to the ground;
and the engine is at full throttle during this process
Detection of boom automatic reset: boom limitation: lift the boom and it should stop rising when
8 it reaches the setting highest position; the control lever returns back to neutral position automat-
ically. The engine is at full throttle during this process
Work implement limitation: visual check that the bucket limit block contacts with boom and
rocker arm limit block when the boom is lifted to the highest position for discharging; take back
9 the bucket when the boom descends to a position that its front pin is about 500mm(19.7In) away
from ground, visual check that boom limit block contacts after taking back the bucket and the
clearance between boom and bucket is more than 5mm(0.197In)
Inspection of work implement running: lift the boom during which no abnormal sound shall
10 occur; no twisting to the bucket during taking and holding back the bucket when the boom is
lifted to the highest position and lowest position;
Floating function and inner leakage detection: when jacking up the bucket backward, visual
check that the boom does not drop quickly; when the bucket is jacked up, push the control lever
11
to the boom lowering, floating position, and the control lever shall close, visually check that the
boom shall be floating and lowering
1-30
Machine Inspection Table January 24, 2017
CLG835H

Inspec-
S/N Inspection method and acceptance criteria
tion item
Ride control (option): park the machine on the level ground, disconnect the ride control system
12 button, jack up the shovel head; after 5 seconds, connect the ride control system button, and the
boom shall perform automatic lowering operation.
Visual check and listening: when turning to the maximum left and right steering angle, the limit
block contacts and no abnormal sound shall occur; visually check that there is no interference
13 between the armrest of cab and front frame, front and rear frame when turning to the maximum
left and right steering angle; there is no interference and pulling between hydraulic line&electri-
cal circuit and other sharp edges
W/steering cushion: turn the complete machine to the limit position, and the steering cushion is
14
compressed (8-12) mm
Secondary steering (option): turn on the electric lock without starting, the secondary steering
15 indicator on the instrument panel comes on when the secondary steering switch is pressed, and
the steering can be normally performed
Gear inspection: Manual 1) Place the manual/auto shift rocker switch to "Manual" 2) Start the
16 complete machine and idle; 3) Release the parking brake; 4) Operate the shift lever and all the
gears shall be available freely;
Gear inspection: Semi-automatic shift 1) Place the manual/auto shift rocker switch at neutral
position; 2) Start the complete machine and idle; 3) Release the parking brake; 4) Operate the
shift lever, and place it at F1 position, and the gear to complete machine transmission shall be
F1 5) Operate the shift lever, and place it at F2 position, and the gear to complete machine
transmission shall be F2; 6) Operate the shift lever, and place it at F3 position, and the gear to
complete machine transmission shall still be F2, depress the accelerator gradually to the maxi-
17
mum and hold it, increase the speed of complete machine, and when it reaches a certain value,
Driving test the gear shall automatically shift up to F3; 7) Keep the opening of throttle, and continuously
increase the vehicle speed and operate the shift lever and place it at F4, and when the speed
reaches a certain value, the gear shall automatically shift up to F4 from F3; (the corresponding
gear is displayed on the gear display during the above operation; and the corresponding speed
is displayed on the LCD of instrument panel)
Gear inspection: Full-automatic shift 1) Place the manual/auto shift rocker switch at "Auto" posi-
tion; 2) Start the complete machine; 3) Release the parking brake; 4) Operate the shift lever, and
place it at F3 position, depress the accelerator gradually to the maximum and hold it, when
speed reaches a certain value, the gear shall automatically shift up to F3 from F2; 5) Keep the
18
opening of throttle, and continuously increase the vehicle speed and operate the shift lever and
place it at F4, and when the speed reaches a certain value, the gear shall automatically shift up
to F4 from F3; (the corresponding gear is displayed on the gear display during the above opera-
tion; and the corresponding speed is displayed on the LCD of instrument panel)
KD function test: Place the shift lever at 2 with low speed, test the key KD on the control lever
19
and FNR respectively, press the key KD and the gear is switched to I
FNR lever test: place the control lever at N2 firstly. And then push the key of FNR lever to N. The
FNR function is activated after the enable key of the FNR lever is pressed. When the FNR func-
20
tion is activated, the FNR lever can be used to perform F(forward)\N(neutral)\R(reverse) and KD
function operation
Power shutoff function 1) place the power shutoff function selection switch at enable state; 2)
release the parking brake; 3) operate the shift lever and place it at F1 or F2 and drive the vehi-
cle; 4) depress the service brake pedal and when it reaches a certain level, the gear shall shift
21
down to neutral; and the power shutoff indicator on the instrument panel comes on; 5) release
the brake pedal, and the gear shall return back to F1 or F2; 6) the power shutoff fails when the
shift lever is placed at F3 or F4.
 1-31
January 24, 2017 Machine Inspection Table
CLG835H

Inspec-
S/N Inspection method and acceptance criteria
tion item
Backup alarm: when the shift lever is placed at reverse, the reverse alarm begins to perform
22
buzzing alarm immediately.
Brake system: Drive the vehicle for 10 laps, during which depress the brake pedal and the com-
23 plete machine is braked, two times per lap; no seizing shall be felt when depressing the acceler-
ator and brake pedal during driving
Fault alarm inspection: observe that no axle oil pressure, oil pressure, service brake, emergency
brake, transmission fluid pressure, hydraulic oil temperature alarm indicator on instrument panel
24
indicates alarm during driving; visual check that torque converter oil temperature, engine water
and oil temperature is displayed at green area;
Steering during driving: no seizing and heavy, floating is felt when turning to the left and right
25
during driving
Power train system inspection: listen to the diesel engine operation for abnormal sound; front
26 and rear axle for abnormal sound; gearbox & torque converter assembly for abnormal sound
during driving
Emergency brake: apply hand brake after climbing 15% of slope (for hand brake with lever, it
27 needs to pull the hand brake latch for 2/3 travel), and then release the brake valve, the complete
Driving test vehicle shall stay for 5 seconds and remain stationary
Pressure maintaining of hydraulic system: extend and retract all oil cylinders to the maximum
with control lever remained open at each end of travel to obtain safety valve pressure, which is
28
remained for about 5 seconds, continuously check it for 120 times with interval more than 10
seconds
Fan's positive and negative rotation (option): the engine is idling, press the fan's positive and
negative rotation switching switch for less than 60 seconds, and then fan can be switched to
29
negative rotation with indicator on; press the switch again for less than 60 seconds and the fan
is switched to positive rotation with the indicator off, no abnormal sound occurs during switching
Detection of rear axle swing angle: reverse the complete vehicle with single wheel on the slope
of vehicle inspection slot, visual check that the tire has no interference with frame, fender, rear
30
cover (with clearance more than 20 mm) pipe on axle has no interference with diesel engine
after stopping the vehicle
Centralized lubrication line: 1) fastened to pin lubrication pipe joints without oil leakage; 2) cen-
tralized lubricator time is correctly set; 3) oil pipe is not bent and twisted; 4) oil pipe runs
31
smoothly without interference with proper length and beautiful appearance; there is no pulling
interference during turning and operation of work implement
1-32
Machine Inspection Table January 24, 2017
CLG835H

Inspec-
S/N Inspection method and acceptance criteria
tion item
Visual check: gap of lapped surface at hinge between boom and frame, oil cylinder, rocker and
1
tie rod light is ≤1mm
Touch: there is no oil leakage at big cavity and small cavity pipe and joint of left and right boom
2 oil cylinder pipeline; visual check that there is no oil leakage at big cavity and small cavity pipe
and joint of bucket tilting cylinder pipeline
Touch: there is no oil leakage at left and right front axle clamp; no oil leakage at front axle input
3
flange; no oil leakage at axle housing and brake line joint on axle
4 Touch: ride control accumulator is installed firmly with the joint free of oil leakage
Touch: there is no oil leakage at transmission front output flange, transmission filler mounting
5
face, shift control valve, level window, level mouth, breather and brake cylinder
Touch: there is no oil leakage at steering gear and joint, pressure regulating valve, flow amplify-
ing valve, unload valve, combination valve, electric proportioning valve, steering pump, priority
6
valve, pilot valve, charge valve, mounting face of working pump and pipe joint; there is no water
leakage at heater pipe and water return pipe joints
Touch: there is no oil leakage at safety valve and oil inlet and return pipe joints to the boom,
bucket tilting, control valve, pilot hose joint on the control valve; visually check that there is no
7
interference between oil inlet and return pipe of control valve, pilot control pipe and other sharp
Static check edges, moving parts
Touch: there is no oil leakage at left and right steering oil cylinder pipe and joint; visually check
8 that there is no interference between steering and brake pipe and other sharp edges, moving
parts
Touch: there is no oil leakage at accumulator in transmission and brake pipe joint, pilot accumu-
9 lator, transmission oil filter and its joint, charge valve and its joint and hydraulic rising mecha-
nism
Touch: there is no oil leakage at bottom of hydraulic oil tank, flange, plug, level window, oil inlet
10
and return pipe joint and flange face
Touch: there is no oil leakage at diesel fuel tank and outlet pipe joint, diesel fuel tank body and
11
flange, plug
Visual check: the left and right semi-circles fender and rear fender is matched flush without
12
shaking
Visual check: rear cover with lifting mechanism is raised smoothly during which there is no inter-
13 ference with other parts; there is no interference between lifting jack and frame, radiator baffle;
there is no oil leakage at lifting cylinder joint
Visual check: rear cover is symmetrical at left and right sides; bottom of rear cover is attached
14
with counterweight, rear frame, left and right plate
 1-33
January 24, 2017 Machine Inspection Table
CLG835H

Inspec-
S/N Inspection method and acceptance criteria
tion item
Visual check: there is no interference between hydraulic oil tank and cab; there is no interfer-
15
ence between left and right hydraulic oil tank guard, foot pedal and driver
Visual check: diesel engine mounting bolt is fastened and there is no oil leakage at parts on left
side and oil pan; there is no interference between diesel engine oil pan and sub frame, rear
16
frame beam; no interference between diesel engine torque converter assembly oil return pipe
joint and intermediate plate of frame
Visual check+touch: there is no water leakage at upper and lower water pipe, cool and warm
17 water pipe and water valve; there is no oil leakage at pipe joints of filter, high pressure oil pump,
flywheel housing cover;
Visual check: there is no interference between brake line at left side of engine, filter and sharp
edges (harness is far away from high temperature area and not interfered with fuel pipe); there
18
is no interference between filters and sharp edges and other parts, and the hoses are not
twisted;
Visual check: urea heating pipe, cool water pipe, diesel particle filter water pipe runs smoothly
19
without interference and is far away from high temperature area.
20 Visual check: arrow of solenoid water valve shall face the urea tank.
Visual check: harness at upper side of diesel particle filter is far away from high temperature
21
area.
Static check Visual check: A/C pipe runs smoothly and is not interfered with other parts, diesel engine high
22
temperature area and the exposed A/C aluminium pipe is not interfered with other parts.
Visual check: the pulley belt is not twisted and peeled off; and the A/C compressor pulley is in
23
the same horizontal plane with diesel engine pulley;
Visual check: clearance between engine fan and shroud is ≥10mm, fan guard ≥15mm; the pul-
24
ley is not interfered with fan guard
Visual check + touch: there is no water and oil leakage at radiator assembly and its radiator pipe
25
joint;
Visual check+touch: there is no oil leakage at rear axle input flange, axle housing and plug, pipe
26
on axle, left and right clamp, breather; axle brake hose joint is not interfered with oil pan;
Visual check+touch: there is no oil leakage at radiator pipe at right side of engine, fuel pipe,
27 brake pipe, filter; there is no interference between filters and sharp edges and other parts, and
the hoses are not twisted
28 Visual check +touch: there is no oil leakage at radiator pipe reversing valve, fan pump joint;
Inspection of quick coupler: lower the bucket to the ground, shut it off and close the pilot shutoff
valve to OFF position. Turn the spool lever to COUPLER, start the machine, open the pilot shut-
29 off valve to OPEN. Operate the multi-functional pilot lever, and check the quick coupler frame
movable pin for free extending and retracting. Turn the engine off, close the pilot shutoff valve to
OFF position, and turn the spool lever to Aux position.
1-34
Machine Inspection Table January 24, 2017
CLG835H
 2-1
January 24, 2017 Power System
CLG835H

Power System
Basic Information ............................................................................................................2-3
Safety .....................................................................................................................................................2-3
Overview-components and position .......................................................................................................2-5
System technical parameters.................................................................................................................2-9
Universal tool, tooling list .....................................................................................................................2-10

Structure Function Principle ........................................................................................2-11

Engine system .....................................................................................................................................2-11
Overview ..........................................................................................................................................2-11
Diesel engine ...................................................................................................................................2-12
Intake and exhaust system ..................................................................................................................2-25
Intake and exhaust assembly...........................................................................................................2-25
Air filter .............................................................................................................................................2-28
Diesel Particle Filter System ................................................................................................................2-30
DEF pipeline assembly ........................................................................................................................2-31
DEF tank ..........................................................................................................................................2-33
DEF pump ........................................................................................................................................2-36
Cooling system ....................................................................................................................................2-38
Overview ..........................................................................................................................................2-38
Radiator group .................................................................................................................................2-43
Fan ...................................................................................................................................................2-45
Refilling and replacement of coolant ................................................................................................2-45
Fuel System .........................................................................................................................................2-46
Fuel Tank Assembly.........................................................................................................................2-46
Fuel Lines.........................................................................................................................................2-47

Removal and Installation ..............................................................................................2-49

Removal and installation of diesel engine............................................................................................2-49
Removal and installation of air filter .....................................................................................................2-64
Disassembly and assembly of air filter.................................................................................................2-67
Removal and installation of DPF (Diesel Particle Filter) ......................................................................2-71
Removal and installation of DEF pump................................................................................................2-75
Disassembly and assembly of DEF tank..............................................................................................2-79
Removal and installation of DEF(diesel exhaust fluid) pump...............................................................2-86
Disassembly and assembly of DEF pump ...........................................................................................2-88
2-2
Power System January 24, 2017
CLG877H

Removal and installation of radiator.....................................................................................................2-91

Disassembly and assembly of radiator ..............................................................................................2-100
Removal and installation of fan ..........................................................................................................2-106
Removal and installation of fuel tank .................................................................................................2-111
Removal and installation of fuel radiator ............................................................................................2-115

Fault Diagnosis and Troubleshooting .......................................................................2-118

Precautions for fault diagnosis ...........................................................................................................2-118
Common fault code and troubleshooting ...........................................................................................2-118
 2-3
January 24, 2017 Basic Information
CLG835H Safety

Basic Information Preventing Burns

After running for some time, parts of the machine

Safety will be hot,such as, engine, DPF (Diesel
Particulate Filter) and inter-cooler steel pipe,
those parts which are cooled down later shall be
Compressed Air inspected or repaired.
Compressed air may cause personal injury.
When using the compressed air for cleaning,
wear the mask, protection suits and shoes. The
maximum pressure of the compressed air for
cleaning should be lower than 25psi (0.2MPa).

Safe Disposal of Waste Fluids

P11000148
● Improper treatment of waste engine oil,
waste diesel and waste DEF is harmful to
environment and ecosystem. Treatment shall Coolant
conform with the local laws and regulations.
At working temperature, the coolant of the
● It is mandatory and necessary to collect the engine is at high temperature and has pressure,
liquid with containers spattered during the the radiator and all the pipes connected to the
inspection, maintenance, test, adjustment radiator contain hot water or vapor, if you touch
and repair of machine. Proper container shall them, serious burn would occur.
be prepared well before opening any fluid
cavity or disassembling the parts containing ● When checking the coolant level, the engine
liquid. Use proper container when draining shall be shut off and the filler cap shall be
liquid. cooled to the extent that it can be opened by
bare hands. Slowly loosen the filler cap of
● Do not use the food or drink containers cooling system to release the pressure.
because they may be drunk by others by
mistake. ● Coolant contains alkali which may causing
injury and do not let it contact your skin, eyes
and mouth.

P19M00059 P11000147

Fire & Explosion Prevention

● All fuels, such as most of lubricants and

some cooling agent are flammables.
2-4
Basic Information January 24, 2017
Safety CLG835H

● Fuel leaking onto the hot surface or electrical

elements may cause fire.
● Do not smoke when refilling or within refiling
area, and in the place storing flammables.

P11000157

● Store the fuel, lubricant into containers with

relevant marks to avoid use by non-working
personnel.
● Put the cleaning cloth or other combustible
materials with oil soaked into protective
container, and set it at a safe place.
● Do not perform welding or flame cutting onto
the pipe containing flammable liquid. Before
welding or cutting, it shall be shall be cleaned
completely with flammable liquid.
● Accumulated flammable materials such as
fuel, lubricant or other scattered materials on
the machine shall be cleaned up.
● Diethyl ether (Warning: Do not use diethyl
ether to start the engine)
● Any approach which attempts to start the
engine by use of diethyl ether may cause
serious damage to engine or casualties.

P11000158
 2-5
January 24, 2017 Basic Information
CLG835H Overview-components and position

Overview-components and position

Components and position

Power system has the function of converting chemical energy of fuel into mechanical energy to be sup-
plied to the machine. Power system includes engine system, radiator system and fuel tank assembly.
Among them, the engine mounting consists of engine, and the radiator mounting consists of cooler com-
ponents.
Module structure figure of power system

Engine mounting assembly

(Include the engine)

Intake and
exhaust assembly

Engine system Fuel lines

Filling system

DEF pipeline assembly

Radiator mounting assembly

(Include radiator group)
Power system Cooling system

Radiator pipe

Oil drain device

Fuel tank assembly

P18P00006
2-6
Basic Information January 24, 2017
Overview-components and position CLG835H

Position figure of power system in the machine

1
2

P18P00007

1. Engine system 2. Cooling system 3. Fuel tank assembly

 2-7
January 24, 2017 Basic Information
CLG835H Overview-components and position

Components of power system

6
2

3
4
P18P00008

1. Diesel particle filter DOC 3. DEF pump 5. Radiator mounting assembly

2. Diesel engine 4. DEF tank 6. Oil-water separator
2-8
Basic Information January 24, 2017
Overview-components and position CLG835H

Components of power system

12

7 11

10

P18P00009

7. Air filter 9. Oil drain device 11.Diesel particle filter SCR

8. Fuel fine filter 10.Solenoid water valve 12.Exhaust pipe
 2-9
January 24, 2017 Basic Information
CLG835H System technical parameters

System technical parameters

Model Perkins 1204F-E44AT

Type In line-four cylinders, four-stroke, turbocharged
Emission EPA Tier4 Final
*Rated power 97.9kW/2200r/min(133.144PS/2200rpm)
Engine *Maximum idling speed 2376±50rpm
*Minimum idling speed 800±50rpm
Engine oil level 7.7L (2.03434USgal)
Clockwise ( viewed from the fan end to flywheel
Direction of rotation
housing end)
Diameter of 880mm(34.6456In), 12 pieces of
Fan
blades, air suction type
Cooling system
Opening temperature: 82°C(179.6°F)
Thermostat
Fully open temperature: 94°C(201.2°F)
Engine oil system Oil filter Full flow type and replaceable (filter can rotate)
Preheating system Preheating method Grid heater
Core type Plate-fin type
Water radiator 870mm X 454mm X 120mm
Core size (height × width × thickness)
(34.2519In X 17.87398In X 4.7244In)
Core type Plate-fin type
Hydraulic oil radiator 870mm X 166mm X 120mm
Core size (height × width × thickness)
(34.2519In X 6.53542In X 4.7244In)
Core type Plate-fin type
Torque converter oil radiator 870mm X 264mm X 120mm
Core size (height × width × thickness)
(34.2519InX 10.39368In X 4.7244In)
Core type Plate-fin type
Air-air intercooler 870mm X 178mm X 120mm
Core size (height × width × thickness)
(34.2519In X 7.00786In X 4.7244In)

Notes: Data marked with * is based on engine with fuel system and water pump under intake resistance
of 380 mm H2O (3.72 kPa) and exhaust resistance of 160.5 mm Hg (21 kPa) not including alternator,
fan, optional configurations and drive components.
2-10
Basic Information January 24, 2017
Universal tool, tooling list CLG835H

Universal tool, tooling list Precautions on removal and installation:

1. Assembly and disassembly must be carried

Name Specification out when engine is cool. In general, open
engine hood after engine is shut down, and
7#, 8#,10#, 11#, 12#, 13#, 16#,
Open-end wrench
18#, 19#, 20#, 22#, 24#, 30# wait for 15 minutes before the engine is
cooled down.
Ratchet wrench, 10#, 11#, 12#,
Ratchet wrench,
socket
13#, 16#, 18#, 19#, 20#, 22#, 24# 2. Measurement equipment and tools such as
and 30# socket torque wrench, etc. shall have compliance
120±6N.m(12±0.6kgf.m), certificates issued by metrological depart-
Torque wrench
1020±6N.m(102±0.6kgf.m) ment;
Traveling crane More than 2t (4410Ib)
3. Because many other related components on
Wire rope with Weight load over 840Kg the complete machine are concerned during
hooks (1852.2Kg) the removal and installation of each compo-
Steel ruler Steel ruler nent, removed components (especially stan-
Straight screw- dard parts) shall be reasonably placed to
driver avoid wrong installation, neglected installa-
Cross screwdriver T25 tion, part missing, etc. during reassembly.
Lifting eye 4. If the removal and installation of other com-
Plastic sealing ponents on the complete machine are con-
membrane cerned in the removal and installation of each
Waste oil tank component, tools are referred to the tool list
Remarks:
for the removal and installation of other com-
ponents and not listed in the tool list of this
component;
5. If the expected effect can be reached in the
ways of using open-end wrench, blower gun
and socket as well as ratchet wrench and
socket to remove and install, anyone can be
chosen.
 2-11
January 24, 2017 Structure Function Principle
CLG835H Engine system

Structure Function Principle

Engine system

Overview

Components and position

The diesel engine mounting assembly is composed of diesel engine, bracket and shock absorber.

1
3

2
P18P00009

1. Diesel engine 2. Bracket 3. Shock absorber

Working principle description

Engine mounting as has the function of realizing effective installation of engine.

The working principle of engine as is as follows: engine is fixed on complete machine via engine mount-
ing composed of mounting support and shock absorber, engine has excellent working environment
through shock isolating action of shock absorber, vibration of engine transferred to complete machine is
reduced, and riding comfort is improved.
Generally, requirements for the engine assembly are as following.
1. Active and static loads can be supported under all working conditions, and engine assembly has dis-
placements in all directions within acceptable range and does not interfere with other parts on chas-
sis. Meanwhile, before repairing the engine, there are no damaged parts.
2. Vibration generated by engine can be sufficiently isolated from being transferred to frame and cab,
and cab operating comfort and service life of complete machine components are improved.
2-12
Structure Function Principle January 24, 2017
Engine system CLG835H

3. Impact generated by uneven roads can be effectively isolated from being transferred to engine
through engine mounting, and influence of road impact on engine is reduced.

Diesel engine

Technical parameters

Model Perkins 1204F-E44TA

Number of cylinder 4
Cylinder diameter 105 mm (0.344505ft)
Stroke 127 mm (0.416687ft)
Displacement 1.16248USgal
Suction mode Turbocharged inter-cooled
*Rated power 97.9kW/2200r/min (133.144PS/2200rpm)
*Maximum idling speed 2376±50rpm
*Minimum idling speed 800±50rpm
 2-13
January 24, 2017 Structure Function Principle
CLG835H Engine system

Part Structure and Principle Introduction

External view of Perkins engine 1204F-E44TA

3
1 2 4

13

12 6

11

10
7

9
8 P18P00010

1. Front lifting eye 6. Pnmiog/trarferfuel pump 11.Oil sampling vafve

2. Crankcase breather 7. In line fuel fitier 12.High-pressure fuel pump
3. Secondary fuel filter 8. Oil level gauge (dipstick) 13.Oil filler
4. Primary fuel fitter 9. Oil drain plug
5. Electronic Control Module 10.Oil filter
2-14
Structure Function Principle January 24, 2017
Engine system CLG835H

14

15

16

17
19

18

P18P00012

14.Air intake 16.Water pump 18.Tensioner

15.Coolant outlet 17.Coolant intake 19.Belt
 2-15
January 24, 2017 Structure Function Principle
CLG835H Engine system

21
20 22
23

32
24
31

30

25

26
29
27
28 P18P00012

20.Back pressure valve 25.Starter solenoid 30.Flywheel housing

21.Htgh-pressure turtoocharger 26.Starting motor 31.NOx reduction cooler
22.Low-pressure turbocharger 27.Starter relay 32.Rear lifting eye
23.Alternator 28.Oil dram tap
24.Refrigerant compressor 29.Flywheel
2-16
Structure Function Principle January 24, 2017
Engine system CLG835H

The diesel engine is generally composed of two major mechanisms and four systems:

 Engine body
and cylinder head

Crank rod
connection mechanism

Air distribution mechanism

Diesel engine Cooling system

Lubrication system

Fuel system

Auxiliary system
P18P00014

Engine body
Basic body of engine and cylinder
head

It is the frame of engine, and

composed of cylinder block, Engine body
crankshaft case and oil pan.

P18P00014
 2-17
January 24, 2017 Structure Function Principle
CLG835H Engine system

It is located at top of cylinder

block, and used for sealing the
cylinder head, and forms a com-
bustion chamber together with
cylinder and piston. It is usually Cylinder head
installed with nozzle, air intake/
exhaust valve, intake/exhaust
pipe and rocker arm shaft
assembly.

P18P00016

Machine body and work compo-

nent, which is composed of pis-
ton group, connecting rod Crank rod con-
group, crankshaft flywheel nection mecha-
group, and used for converting nism
the chemical energy of fuel into
mechanical energy for output.

P18P00017
2-18
Structure Function Principle January 24, 2017
Engine system CLG835H

3 It is composed of piston, piston

ring and piston pin.
Piston: piston head is a part of Piston group
combustion chamber, with the
shape of dome head, flat head,
4 crown head

1. Gas ring 3. Piston

2. Oil ring 4. Piston pin P18P00018

It is composed of connecting
rod, connecting rod bolt and
connecting rod bearing. The
connecting rod is used for con- Connecting rod
verting the reciprocating motion group
of piston into the rotation motion
of crankshaft, and transferring
the force of piston to crankshaft.

P18P00019
 2-19
January 24, 2017 Structure Function Principle
CLG835H Engine system

It is composed of crankshaft, fly- Crankshaft fly-

wheel and torsion damper wheel group

P18P00020

5
≊䰶ᇚ㖟
1

It is composed of valve group

2
京ᵼ and valve train, and mainly used
for controlling the intake/
exhaust process of engine and Air distribution
ensuring that the fresh air is mechanism
filled into the cylinder timely and
3京ḧ making the exhaust gas out of
࠮䖤 ≊䰶 the cylinder in time.
4
6

1. Bucket lever 4. Cam

2. Push rod 5. Air valve chamber cover
3. Ejector pole 6. Air valve

P18P00021
2-20
Structure Function Principle January 24, 2017
Engine system CLG835H

It is composed of valve, valve

guide, valve seat ring, valve
Valve group
2 spring, valve rotating mecha-
4 nism

1. Valve guide pipe 3. Valve spring

2. Valve 4. Valve seat ring
P18P00022

2
1. Bucket lever
2. Push rod It is composed of camshaft, tap-
3. Ejector pole pet, push rod, rocker arm, timing Valve train
4.Cam shaft gear

4
P18P00023

Guarantee working under suit-

able temperature. It is com-
Cooling system
posed of water pump,
thermostat and water channel
 2-21
January 24, 2017 Structure Function Principle
CLG835H Engine system

It is used for increasing the

pressure of cooling water to
accelerate the cycle of cooling
Water pump
water in the cooling system to
enhance the heat radiating abil-
ity

P18P00024

It is used for controlling the cool-

ing water to pass major cycle or
minor cycle depending on the
Thermostat
cooling water temperature to
make the engine operate under
the proper temperature

P18P00025

It is built into the machine body

to allow the cooling water flow
Water channel
over each component to be
cooled

4 Components:
Oil pan, oil pump, oil radiator, oil
5 filter

1 6
Function:
Lubrication sys-
2 It is used for transferring the tem
proper amount of lubricant to
3 the system where the part to be
1. Coarse filter 4. Main oil gallery lubricated locates and its attach-
2. Fine filter 5. Engine oil pump ment to ensure the normal oper-
3. Engine oil pan 6. Secondary filter
ation of engine
P18P00026
2-22
Structure Function Principle January 24, 2017
Engine system CLG835H

It is composed of fuel coarse fil-

ter (oil-water separator),fuel
delivery pump,fuel fine filter,fuel
injection pump,injector,fuel pipe Fuel system
and combustion chamber,and
used for supplying fuel to
engine.

It is used for filtering the larger

Fuel coarse fil-
particles of impurity and
ter (oil-water
installed at the front of fuel inlet
separator)
line (fuel delivery pump)

P18P00027

Start and generate power, etc. Auxiliary system

The starter motor is energized

and rotates to drive the crank-
shaft of engine to rotate and Starting system
allow it transmitted to a state of
running itself from static state.

P18P00028
 2-23
January 24, 2017 Structure Function Principle
CLG835H Engine system

P18P00029

It is used for charging the bat-

tery when the engine operates
to ensure that the battery can Alternator
provide high enough voltage
during the engine cranking

P18P00030

It pushes the turbo to drive the

vane rotating at high speed by
using the high speed of exhaust
to increase intake pressure and Turbocharger
improve intake quantity (intake
density), and finally improve
engine power and economy.

P18P00031
2-24
Structure Function Principle January 24, 2017
Intake and exhaust system CLG835H

Intake and exhaust system

Intake and exhaust assembly

Components and position

Intake and exhaust assembly consists of air pre-filter, air filter, diesel oxidation catalyst (DOC), selective
catalytic reducer (SCR) and exhaust pipe.

1
4

P18P00032

1. Air filter 3. Selective catalytic reducer (SCR)

2. Exhaust pipe 4. Diesel oxidation catalyst (DOC)

Description of principle diagram and working principle

The functions of the intake and exhaust assembly are:

1. Supply clean and dry air with proper temperature for engine to burn so as to minimize engine wear
and optimize engine performance;
2. Keep all exhaust gases safely away from engine and discharge them into atmosphere quietly while
optimizing engine performance.
 2-25
January 24, 2017 Structure Function Principle
CLG835H Intake and exhaust system

Working principle of the intake and exhaust assembly: air is taken in through air pre-filter. There are
rotating blades inside the air pre-filter, which can discharge big dust in intake air from the bottom of air
pre-filter. Intake air reaches air filter, filter element removes small dust and moisture to obtain clean and
dry air to be sent to turbocharger, the turbocharger is driven by engine exhaust to pressurize intake air
and increase intake quantity, and sufficient combustion of fuel can be ensured. Air coming out of turbo-
charger goes through air-air intercooler in cooling system and electric heater of engine itself to obtain
proper temperature and then enters engine block to burn. Exhaust gas generated after combustion
reaches turbocharger via exhaust manifold, drives turbocharger to pressurize intake air and is then dis-
charged to DPF (Diesel Particle Filter). When exhaust gas gets to diesel particle filter DOC, particulates
will be oxidized to CO2. Then enters into decomposition reactor tube (DRT). Urea solution injected to
DRT from the outside will break down to form ammonia gas and mingle with exhaust gas. When gas
mixture including exhaust gas and ammonia gas enters into diesel particle filter SCR, under the reaction
of catalyzer, nitride oxides will be broken down into nitrogen and water. Finally, exhaust gas pollutants
content injected into the atmosphere will be greatly reduced, conforming with Euro IV emission require-
ment.

Air intake path figure of engine:

2 
Cold gas 

3
Hot gas

P18P00033

1. Air pre-filter 2. Air filter 3. Turbocharger

2-26
Structure Function Principle January 24, 2017
Intake and exhaust system CLG835H

Exhaust path figure of engine:

 Cold gas 

Hot gas 

1
P18P00034

1. Turbocharger 2. Diesel oxidation catalyst DOC 3. Selective catalytic reducer SCR

 2-27
January 24, 2017 Structure Function Principle
CLG835H Intake and exhaust system

Air filter

Technical parameters

P18P00035
2-28
Structure Function Principle January 24, 2017
Intake and exhaust system CLG835H

Part Structure and Principle Introduction

The air filter is composed of housing, main filter,safety filter and end cover. Air filter ensures clean and
dry air to enter engine through main filter element and safety filter element. When engine operates, air
enters air filter through pre-filter, and is filtered by main filter element and is then secondarily filtered by
safety filter element,as shown in figure below:

4
1
2 3
P18P00036

1. Shell 2. Safety filter element

1. Main filter element 3. Cover

Dirty air gets

into pre-filter part

Clean air gets

into engine

Air flow with dust

P18P00037

Air filter blocked alert of this machine is the electronic induction type. When the filter works for a period of
time, much dust is accumulated on filter element, and air resistance through filter is increased. When
circulating air resistance is above 6.2KPa (0.0632214kgf/cm³), air filter blockage sensor installed
between air filter and turbocharger will transmit signal to air filter alert indicator on instrument panel.
When the indicator goes on, air filter shall be maintained.
 2-29
January 24, 2017 Structure Function Principle
CLG835H Diesel Particle Filter System

Diesel Particle Filter System

Part Structure and Principle Introduction

The main function of DPF (Diesel Particle Filter) is to reduce the harmful substance of engine exhaust in
order to conform with emission standard. Particulates and NOx emission of the model conform with the
emission standard of Tier 4Final/Euro Stage IV.

Exhaust

P18P00038

1. DOC 2. DEF nozzle 3. SCR

Terminology:

DOC: Diesel Oxidation Catalyst

SCR: Selective Catalytic Reduction
Diesel particle filter of the model adopts DOC+SCR routine. When exhaust passes DOC, under the
function of catalyzer, hydrocarbon HC is oxidized to CO2 and water. When exhaust passes SCR, nitride
oxides NOx is reduced to nitrogen and water.
The reaction in the DOC:
HC (Hydrocarbon Compounds ) + O2 → H2O + CO2
The reaction in the SCR:
NOx(nitrogen oxides) + NH3(ammonia)+ O2 → (catalytic reaction) → N2 + H2O.
2-30
Structure Function Principle January 24, 2017
DEF pipeline assembly CLG835H

DEF pipeline assembly

Components and position

DEF pipe-line assembly includes DEF tank, DEF pump, DEF pipe-line and water way.

4
1

P18P00039

1. DEF tank 3. DEF pipe-line

2. DEF pump 4. Water way
 2-31
January 24, 2017 Structure Function Principle
CLG835H DEF pipeline assembly

Description of principle diagram and working principle

The function of DEF pipe-line is to provide appropriate amounts of DEF for DPF (Diesel Particle Filter)
system in order to reduce nitride oxides content of exhaust. DEF is pumped to DEF pump from DEF tank
via outlet pipe and then transported to injector via pressure pipe. Excess urea returns urea pump from
the return pipe.

DEF flows out of tank

DEF flows back to tank

DEF flows back to nozzle

1
P18P00040

1. DEF tank 3. DEF liquid return pipe 5. DEF pressure pipe

2. DEF outlet pipe 4. DEF pump 6. Nozzle
2-32
Structure Function Principle January 24, 2017
DEF pipeline assembly CLG835H

Water way is used to transfer engine coolant to DEF tank and heat the DEF solution avoiding the crystal-
lization. When urea temperature is less than -8°C(17.6°F), the solenoid water valve of water way opens,
and engine coolant enters into urea tank to prevent urea solution from freeze, however, when urea tem-
perature exceeds 5°C(41°F), the solenoid water valve of water way closes to prevent urea solution from
precipitation out because of being excessively heated.

1
Water effluent from engine

Engine returning water

P18P00041

1. DEF nozzle 3. Engine returning water inlet 5. DEF tank

2. Engine water outlet 4. Solenoid water valve

DEF tank

Technical parameters

USABLE VOLUME 19.3L

DEUTSCH DT04-4P
PIN #1: CAN LOW
ELECTRICAL CONNECTOR: PIN #2: CAN HIGH
PIN #3: GROUND
PIN #4: POWER
 2-33
January 24, 2017 Structure Function Principle
CLG835H DEF pipeline assembly

Part Structure and Principle Introduction

The function of DEF tank is to store DEF solution and provide DEF for DPF (Diesel Particle Filter) during
the machine operates. DEF tank consists of shell, multi-functional head unit and cover. There are three
sensors in the multi-functional head unit: temperature sensor, liquid level sensor and quality sensor.
Temperature sensor detects DEF solution temperature and transports signal to ECM, when DEF temper-
ature is less than -8°C, the solenoid water valve is opened, and engine coolant enters into def tank to
prevent DEF solution from freezing, however, when DEF temperature exceeds 5°C, the solenoid water
valve is closed to block coolant entering and prevent DEF solution from being excessively heated. Fuel
level sensor detects the surplus of DEF solution and transports signal to ECM, if DEF fuel lever is less
than alarm value, the situation will trigger low fuel lever alarm and remind the operator of adding DEF.
Mass sensor detects DEF mass, if user wrong adds other oils or water,or the concentration of DEF solu-
tion is unqualified, these situations will lead to alarm and remind the operator of adding DEF.

Multifunction DEF Header Unit

1
4
Fill Cap

2Tank Fill Port Adapter

5

P18P00042
1. Multifunction DEF Header Unit 3. Drain Plug 5. Fill Port Adapter
2. Tank 4. Fill Cap
2-34
Structure Function Principle January 24, 2017
DEF pipeline assembly CLG835H

Multi-functional head unit

6
Electrical connection
flying lead - 375 mm long

4
2
7

5
8

1
3

P18P00043

1. DEF level and temp sensor assembly 4. DEF outlet 7. DEF inlet
2. DEF tank heating tube (engine coolant flow 5. Coolant inlet 8. Coolant outlet
internally) 6. Electrical connection flying lead - 375mm
3. DEF suction filter on pick up long
 2-35
January 24, 2017 Structure Function Principle
CLG835H DEF pipeline assembly

DEF pump

Part Structure and Principle Introduction

Urea pump will pump urea solution from urea tank, and the urea solution is transported to the nozzle of
diesel particle filter after filtering.

1 Cap for serviceable

DCU 11 filter on top of unit
2

Mounting 10
Mounting Tab
Tab

9
Vent

Harness
PEU Harness 8 Restraint
3 Connectror

DEF flows into DEF pump

Mounting
Tab 4 DEF flows toward nozzle
Mounting Tab
7

DEF Outlet to injector DEF inlet from Tank

6
5
P18P00044

1. DCU 5. DEF Outlet to injector 9. Vent

2. Mounting Tab 6. DEF inlet from Tank 10.Mounting Tab
3. PEU Harness Connectror 7. Mounting Tab 11.Cap for serviceable filter on top of unit
4. Mounting Tab 8. Harness Restraint
2-36
Structure Function Principle January 24, 2017
DEF pipeline assembly CLG835H

P18P00045

1. Protection shield 2. Strainer assembly 3. Housing

 2-37
January 24, 2017 Structure Function Principle
CLG835H Cooling system

Cooling system

Overview

Components and position

The radiator system is composed of radiator mounting, radiator pipe and oil drain device.

3
1
P18P00046

1. Radiator mounting 2. Radiator pipe 3. Oil drain device

2-38
Structure Function Principle January 24, 2017
Cooling system CLG835H

Description of principle diagram and working principle

Cooling system comprises a radiator and corresponding connecting lines, where the radiator is com-
posed of a water radiator, an air-air intercooler, a hydraulic oil radiator and a torque converter oil radiator.
Its function is to radiate heat produced by each part (or system) into the air along with cooling air in order
to ensure each part works properly in appropriate temperature range.
As shown below, diesel engine cooling system mainly comprises a radiator (water tank), a water pump, a
fan, a thermostat, an engine oil cooler, water intake and outtake pipes, etc.

3 2 1 10
9

5 6
6 7
4

P18P00047

1. Water outlet pipe assembly 5. Fan 9. Heating valve

2. Small circulation 6. Water pump 10.Water temperature sensor
3. Thermostat 7. Engine oil radiator
4. Radiator 8. Water drain valve
 2-39
January 24, 2017 Structure Function Principle
CLG835H Cooling system

Cooling system of this machine adopts hydraulic to drive fan and adopts suction mode to cool. The
system adopts forced closed circulating water cooling system. Working principle of system is as follows:
water outlet at lower part of cooler is connected with water inlet of engine oil cooler via water hose, water
outlet of engine oil cooler is connected with water pump via water hose, water pump pumps coolant into
cylinder block water passage, coolant firstly cools cylinder through water jacket inside cylinder block,
then flows up to cool cylinder head, and is collected by water outlet header pipe to reach thermostat.
When coolant temperature is lower than 84°C(183.2°F), thermostat is closed, and all coolant is
bypassed to water pump inlet. At the moment, coolant is only circulating between cylinder block and
cylinder head, so that warm-up can be quickly realized. When coolant temperature is above
82°C(179.6°F), thermostat starts to be opened, part of coolant flows to water inlet at upper part of cooler
and enters radiator to be cooled by cooling fan. When coolant temperature is above 95°C(203°F),
thermostat is totally opened, bypass hole is closed, and all coolant is cooled by radiator. The coolant
flowing direction at the moment is shown in the chart.

Engine water circulation

P18P00048

1. Engine 2. Water radiator

2-40
Structure Function Principle January 24, 2017
Cooling system CLG835H

Air-air intercooler radiator

Air-air intercooler has the main function of cooling high-temperature high-pressure gas across
turbocharger and reducing temperature of air entering engine combustion chamber to increase air
density. Its working principle is shown in Fig. below. After air is pressurized by turbocharger, temperature
rises up sharply, pressure is increased, air flows into air-air intercooler from left air pipe and passes
across core of air-air intercooler, external cooling air flows by outside the core to bring away heat of air
inside intercooler so as to reduce its temperature to be lower than 80°C(176 °F), and then, the air flows
into engine intake manifold and cylinder from right air pipe of air-air intercooler.

4
1

2
9
8
P18P00049

1. Booster air inlet 4. Air-air intercooler radiator 7. Cylinder

2. Booster air outlet 5. Pressurized hot air 8. Exhaust gas
3. Pressurized cold air 6. Intake branch pipe 9. Muffler
 2-41
January 24, 2017 Structure Function Principle
CLG835H Cooling system

The air-air inter cooler radiating system of the vehicle arranged as the drawing below.

P18P00050

1. Air-air intercooler 2. Turbocharger

Hydraulic oil radiator

Hydraulic oil radiator has the main function of radiating heat generated by hydraulic oil during the work-
ing of hydraulic system to avoid temperature of hydraulic oil line from being too high.
2-42
Structure Function Principle January 24, 2017
Cooling system CLG835H

Torque converter oil radiator

Torque converter oil radiator has the main function of radiating heat generated by torque converter oil
during the working of transmission and torque converter to avoid temperature of torque converter and
transmission from being too high and ensure normal working of machine.

P18P00051

Radiator group
Technical parameters
Core type Plate-fin type
Water radiator 870mm X 454mm X 120mm
Core size (height × width × thickness)
(34.2519In X 17.87398In X 4.7244In)
Core type Plate-fin type
Hydraulic oil radiator 870mm X 166mm X 120mm
Core size (height × width × thickness)
(34.2519In X 6.53542In X 4.7244In)
Core type Plate-fin type
Torque converter oil radiator 870mm X 264mm X 120mm
Core size (height × width × thickness)
(34.2519InX 10.39368In X 4.7244In)
Core type Plate-fin type
Air-air intercooler 870mm X 178mm X 120mm
Core size (height × width × thickness)
(34.2519In X 7.00786In X 4.7244In)
 2-43
January 24, 2017 Structure Function Principle
CLG835H Cooling system

Part Structure

The radiator assembly is composed of air-air intercooler, water radiator, hydraulic oil radiator and torque
converter oil radiator.

2
3

P18P00052

1. Water radiator 3. Air-air intercooler

2. Hydraulic oil radiator 4. Torque converter oil radiator
2-44
Structure Function Principle January 24, 2017
Cooling system CLG835H

Fan 6. Slowly open auxiliary tank cover (wait until

engine coolant temperature drops to be
Technical parameters below 50°C\122°F), slowly add coolant until
coolant level is within 1 cm higher than well-
Number of
Diameter Mode head bottom, and remain stable within ten
vane minutes.
880mm\ Induced
Fan 12
34.6456In draft

Refilling and replacement of coolant

1. Completely mix water and anti-freeze in

advance according to selected cooling pro-
portion.
2. Park machine on flat ground, apply parking P18P00054
brake and shut down engine.
3. Turn on the power switch (-); insert the key
Base of the wellhead
into the start switch and turn to 1st gear
clockwise to power on the machine, pull the
change-over switch of air conditioning sys-
tem to heating position.
4. Open engine hood, and turn the manual
valve on the water inlet pipe of engine to ON
position (at which, valve handle is consistent P18P00055
with line route).
7. Tighten auxiliary tank cover, start engine,
firstly operate it for 5 minutes at low idle
speed, then operate it for 5 minutes at high
idle speed, and increase coolant temperature
to be above 85°C(185°F).
8. Check coolant level through inspection win-
dow once again, and after engine coolant
temperature drops to be below 50°C(122°F),
continue to refill coolant until level is within 1
P18P00053 cm higher than wellhead bottom as neces-
sary.
5. (Only operate this step in replacing coolant.)
Put a container with the capacity of about 35 9. Close the engine hood.
L at rear left side of machine, connect one
hose into water drain valve of drain hose,
unscrew auxiliary tank cover, loosen water
drain valve so that coolant flows into the con-
Do not only use the water as coolant
tainer, and tighten water drain valve after
draining coolant. When filling coolant, air in engine cooling
system pipe shall be discharged,
Do not refill coolant into hot engine to avoid
possible damages to engine body. Wait until
engine temperature is below 50°C(122°F).
 2-45
January 24, 2017 Structure Function Principle
CLG835H Fuel System

Fuel System

Fuel Tank Assembly

Technical parameters

Effective volume 193L (50.9906USgal)

Part Structure and Principle Introduction

The fuel tank assembly is mainly composed of fuel tank, filler pipe, breather pipe, fuel tank cover.

P18P00056
2-46
Structure Function Principle January 24, 2017
Fuel System CLG835H

Fuel Lines

Overview-components and position

The fuel line is composed of fuel hose, fuel filter and fuel radiator.

P18P00057

1. Fuel radiator 3. Fuel hose

2. Oil-water separator 4. Fuel pump
 2-47
January 24, 2017 Structure Function Principle
CLG835H Fuel System

Description of principle diagram and working principle

6 3

P18P00058

1. Fuel tank 3. Oil transfer pump 5. Oil-water separator

2. Fuel filter 4. High-pressure fuel pump 6. Fuel radiator

Fuel system acts to provide engine with clean and sufficient fuel, which thus ensures proper operation of
engine. Its working principle is shown above: when engine works, oil transfer pump sucks fuel from fuel
tank, then oil-water separator eliminates water from fuel, next fuel filter eliminates Impurities from fuel,
and finally fuel enters high pressure fuel pump. The fuel is pressurized by the high pressure fuel pump
and filled into high pressure common rail. Then, the fuel in the common rail enters into injector, while the
spare fuel returns back to the outlet of high pressure fuel pump. The injector is controlled by ECM. The
diesel fuel is injected into combustion chamber, while the spare fuel returns back to the outlet of high
pressure fuel pump and then back to fuel tank after cooled.

Fuel radiator

The fuel radiator is used for cooling the hot fuel that returns back from engine fuel pump to avoid the hot
fuel directly flowing back to the fuel tank and heating the fuel in it.
2-48
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Removal and Installation

Removal and installation of diesel engine

Removal

Figures Contents Tools

1. Turn off the negative elec-
trode switch, and hang on a
"No operating" warning
board.

P18P00059
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P18P00060
 2-49
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

1. Remove the engine hood
top cover according to
removal and installation
requirements and steps of
engine hood.
2. Remove air filter according
to the removal steps of air fil-
ter and seal every port with
plastic seal membrane as
required.
3. Remove diesel particle filter
and connecting pipe accord-
ing to the removal steps of
diesel particle filter and seal
every port with plastic seal
membrane as required. Plastic sealing
membrane
4. Drain the cooled water in the
engine to oil collection dish Oil collecting
for unified disposal. basin
5. Remove electrical connector
and wiring on engine
according to removal and
installation requirements
and steps of electrical sys-
tem.
6. Remove A/C compressor, A/
C pipe and warm air hose
from the engine according to
removal and installation
requirements and steps of
air conditioning system, and
seal every ports with plastic
sealing membrane as
required.
2-50
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

7. Unscrew the fuel pipe joint
screw connected to the die-
sel engine fuel pump with
wrench. Remove the screw,
seal gasket and keep them
in a plastic bag. Mask the Tool:
fuel pipe joint with sealing Open-end
membrane. wrench 19#
Plastic sealing
bag
Plastic sealing
membrane

P18P00061

8. Unscrew the intercooler pipe

fixing clamp and bracket.
Unscrew the clamps at both
ends of intercooler pipe,
Tool:
unplug the pipe and seal
every port with plastic seal Open-end
membrane. wrench 12#, 16#
Plastic sealing
membrane

P18P00062

9. Unscrew the clamp at the

connection of intake pipe
and engine, unplug the
intake pipe. Unscrew the Tool:
connecting clamp between
intake pipe and intake hose, Open-end
take off the intake pipe. Seal wrench 8#
every port with plastic seal- Plastic sealing
ing membrane. membrane

P18P00063
 2-51
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

10. Unscrew the clamp at the
connection of water inlet
pipe, outlet pipe and engine,
unplug the water inlet pipe,
outlet pipe and seal every
port with plastic seal mem- Tool:
brane. Open-end
wrench 8#
Plastic sealing
membrane

P18P00064

11. Unscrew the clamp at the

connection of water inlet
pipe and engine, unplug the
water inlet pipe and seal
every port with plastic seal
membrane.
Tool:
Open-end
wrench 7#
Plastic sealing
membrane

P18P00065
2-52
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

12. Unscrew the 4 bolts on the
heat insulation bracket, and
tilt it to the radiator direction
by an angle to avoid interfer-
ence when lifting the engine.

P18P00066
13. Slowly operate traveling
2 crane, hang lifting eye on
1
engine with hook on wire
rope, and tauten wire rope
without lifting engine.

Tool:
Traveling crane
Wire rope with
hooks

1. Lifting eye
2. Lifting eye P18P00067
 2-53
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

14. Remove captive bolts on
connecting surface of
engine and torque con-
verter & engine flywheel
according to removal and
installation requirements
and steps of transmission &
torque converter assembly.

P18P00068

15. Hold fixing nut of engine with

an open-end wrench, and
remove captive bolt of
engine from under engine
mounting support with a
blower gun, a rod and a
socket. And take down the
upper shock absorber and
its cover from the engine
Tool:
mounting support.
Open-end
wrench 30#

P18P00069
2-54
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

16. Operate wire rope on travel-
Lifting hole ing crane for lifting hook to
pass hook through lifting
hole at pulley side of engine,
and lift engine as slowly as
possible. It is recommended
that lifting height is not more
than 5 mm.
Traveling crane
Wire rope with
hooks

P18P00070

17. Take out the shock absorber

and cover under the mount-
ing support of the engine.

P18P00071
 2-55
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

18. Slowly operate traveling
crane and hold both sides of
engine in order to ensure
that engine is slowly and
steadily lifted out of com-
plete machine and will not
collide with other parts of
complete machine.

1 2

1. Holding position
2. Holding position
P18P00072

19. Loosen captive bolt of

engine mounting support
with an open-end wrench
and take it out, then take
down engine mounting sup-
port.
Tool:
Open-end
wrench 16#

P18P00073
2-56
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Installation

Figures Contents Tools

1. Install engine mounting sup-
port on engine with captive
bolt for engine mounting
support, and pre-tighten
captive bolt with an open-
end wrench. Tool:
2. Tighten mounting base cap-
Open-end
tive bolt of engine with a wrench 16#,
torque wrench to torque of
120±50N.m (12±5kgf.m). torque wrench
120±6N.m(12±0.
6kgf.m)

P18P00074

3. Place shock absorber and

cover at upper and lower
sides of engine mounting
support respectively, and
adjust shock absorber so
that it is installed into hole of
mounting support.

P18P00075
 2-57
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

4. Operate the traveling crane
Lifting hole and put down the engine as
slow as possible to match
the engine surface and
gearbox & torque converter
assembly surface, and align
the holes.

P18P00076

5. Install and tighten the bolts

and hard washer of the
torque converter housing &
the engine housing. Tighten-
ing torque: 72±6Nm
(7.2±0.6kgf.m). Tool:
16# socket,
pneumatic
impact wrench,
open-end 16#
fixed torque
spanner

P18P00077
2-58
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

6. Crank the engine flywheel
case to make the torque
converter align with mount-
Tool:
ing threaded hole on the
engine flywheel, screw and 16# Socket,
tighten the fastening bolts
pneumatic
and washer for attaching the
impact wrench,
torque converter to the
open-end 16#
engine flywheel by hand
fixed torque
with a torque of 60±5Nm
spanner
(6±0.5kgf.m).
P18P00078

7. Assemble shock absorber,

cap and engine mounting Tool:
support together by passing
engine fasteners such as Open-end
captive bolt and nut through wrench 16#
them.
8. Hold nut with an open-end
wrench, and pre-tighten cap-
1020±6N.m
tive bolt of engine from
(102±0.6 kgf.m)
under engine mounting sup-
torque wrench
port with a blower gun, a rod
and a socket.
9. Re-tighten captive bolt of
transmission with a torque
wrench according to
P18P00079
removal and installation
requirements and steps of
transmission.
10. Tighten captive bolt of
engine with a torque wrench
to torque of 1020±6N.m
(102±0.6 kgf.m) .
 2-59
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

11. Push the heat-insulation
bracket to installation posi-
tion and tighten the 4 anchor
bolts.

Tool:

P18P00080

12. Insert the water inlet pipe

into hot water inlet of engine,
then clamp it with a clamp.

Tool:
Open-end
wrench 7#

P18P00081
2-60
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

13. Insert the water outlet pipe
into water outlet of engine,
the water inlet pipe into
water inlet of engine, then
clamp it with a clamp.

Tool:
Open-end
wrench 8#

P18P00082

14. Insert the intake pipe into air

inlet of engine, then clamp it
with a clamp. Insert the
intake pipe into intake hose
and clamp it with a clamp.
Tool:
Open-end
wrench 8#

P18P00083

15. Insert the intercooler pipe

into silicone hose on the
engine and radiator and
clamp it with a clamp. Fix
the intercooler pipe bracket
on the intake/exhaust Tool:
bracket and pre-tighten it Open-end
with bolts. Fix the intercooler wrench 12#, 16#
pipe on the bracket with U-
clamp and tighten it with a
nut. Tighten the intercooler
pipe bracket mounting bolt.
P18P00084
 2-61
January 24, 2017 Removal and Installation
CLG835H Removal and installation of diesel engine

Figures Contents Tools

16. Fix the diesel joint on the
engine fuel pump with screw
and seal gasket. The pipe
connected to the oil-water
separator is fuel inlet pipe
and is connected to the fuel
inlet of fuel pump with only
the inlet marked "in" . Tool:
Open-end
wrench 19#

P18P00085

17. Install the A/C compressor,

A/C pipe and warm air water
pipe to the engine according
to the installation require-
ments and steps of air con-
ditioning system.
18. Install the electrical connec-
tor and circuit to the engine
according to the removal
and installation require-
ments and steps of electrical
system described.
19. Install the diesel particle fil-
ter and connecting pipe
according to the installation
steps of diesel particle filter
described.
2-62
Removal and Installation January 24, 2017
Removal and installation of diesel engine CLG835H

Figures Contents Tools

20. Install the air filter according
to the installation steps of air
filter described.
21. Install the engine hood
according to installation
steps of engine hood.
22. Open the engine hood and
fill the anti-freeze.
23. Close the engine hood and
take off the warning board
"No operating".
 2-63
January 24, 2017 Removal and Installation
CLG835H Removal and installation of air filter

Removal and installation of air filter

Removal

Figures Contents Tools

1. Put out the harness connec-
tor on the air filter, and seal
every ports with plastic seal-
ing membrane as required.

Tool:

P18P00086

2. Loosen the clamp connect-

ing air filter and intake pipe
with wrench, and remove
the clamp. Pull out the
intake pipe and seal the
ports with plastic membrane.
Tool:
Open-end
wrench 8#

P18P00087
2-64
Removal and Installation January 24, 2017
Removal and installation of air filter CLG835H

Figures Contents Tools

3. Loosen the bolts of the air fil-
ter mounting plate with
wrench, then remove the air
filter with mounting plate.

Tool:
Open-end
wrench 13#

P18P00088

4. Remove captive bolts of air

filter with open-end wrench,
and remove air filter.
Remove the blocking indica-
tor of air filter from the air fil-
ter.
Tool:
Open-end
wrench 10#

P18P00089
 2-65
January 24, 2017 Removal and Installation
CLG835H Removal and installation of air filter

Installation

Figures Contents Tools

1. Fix the air filter on the
mounting plate with bolts.

Tool:
Open-end
wrench 10#

P18P00090

2. Install the air filter with the

mounting plate on the heat
insulation bracket.

Tool:
Open-end
wrench 13#

P18P00091

3. Install the intake pipe in the

both ends of air filter, and
hold them with clamps.

Tool:
Open-end
wrench 8#

P18P00092
2-66
Removal and Installation January 24, 2017
Disassembly and assembly of air filter CLG835H

Figures Contents Tools

4. Install the blocking indicator
of air filter on the air filter,
and press the indicator end
face to reset it.

Tool:

P18P00093

5. Check the inner of connec-

tors on the air filter and indi- Tool:
cator for water or sand. If
any, clean them up. Plug the Open-end
harness connector on the wrench 10#
two connectors.

Disassembly and assembly of air filter

Disassembly

Figures Contents Tools

1. Open the lock buckle, and
remove the end cover on the
air filter;

It needs no other
tooling or tools in
the disassembly
process.

P18P00094
 2-67
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of air filter

Figures Contents Tools

2. Take out the main filter ele-
ment along the direction of
housing. It can be taken out
directly by hand, and then
take out the main filter ele-
ment by sequence.

P18P00095

3. Take out the safety filter ele-

ment along the direction of
housing. Use the handle on
the surface of safety filter
element to pull the filter ele-
ment towards the housing
center, and remove it.

P18P00096

Check

Check the main and safety filter element before installation. Visually check the sealing surface for cut,
tear or indentation. If there is any visible damage, do not install them.
2-68
Removal and Installation January 24, 2017
Disassembly and assembly of air filter CLG835H

Assembly

Figures Contents Tools

1. Use the handle of safety fil-
ter element to make the filter
element slide into the outlet
side at an oblique angle and
push it to the position, until
the filter element is already
firm and flat in the housing. It needs no other
tooling or tools in
the assembly
process.

P18P00097

2. Insert the main filter ele-

ment. Push downward the
filter element at 5°angle,
until it hit the end of housing.

P18P00098
3. Install cover of air filter and
tighten the lock buckle. If
uncovered, remove the
cover and re-check the filter
element position. If the
installation of filter element
is incorrect, it will be difficult
to install the cover.

P18P00099
 2-69
January 24, 2017 Removal and Installation
CLG835H Removal and installation of DPF (Diesel Particle Filter)

Removal and installation of DPF (Diesel Particle Filter)

Removal

Figures Contents Tools

1. Turn off the negative elec-
trode switch, and hang on a
"No operating" warning
board.

P18P00100
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P18P00060

2. Remove the mounting bolt

of the exhaust pipe, and
take off the exhaust pipe.

Tool:
Open-end
wrench 13#

P18P00102

3. Remove the engine hood

and top cover according to
removal and installation
requirements and steps of
engine hood.
2-70
Removal and Installation January 24, 2017
Removal and installation of DPF (Diesel Particle Filter) CLG835H

Figures Contents Tools

4. Remove the DEF(diesel
exhaust fluid) pipe joint and
electrical connector on the
DOC.

P18P00103

5. Unplug the exhaust pipe and

SCR electric connector,
Remove the U-clamp and
clamp, take off the exhaust
pipe.
Tool:
Open-end
wrench 11#

P18P00104

6. Loose the clamp of DOC &

bellow, and unscrew the
captive bolts of brackets.
Tool:
Open-end
wrench 11#
Open-end
wrench 18#

P18P00105
 2-71
January 24, 2017 Removal and Installation
CLG835H Removal and installation of DPF (Diesel Particle Filter)

Figures Contents Tools

7. Unscrew the captive bolts on
one side bracket of SCR and
lower the diesel particle fil- Tool:
ter. Take care of the clamp Open-end
and seal gasket, and mask wrench 18#
each port with plastic seal
Traveling crane
membrane.
Wire rope with
hooks
Plastic sealing
membrane
P18P00106

Installation

Figures Contents Tools

1. Lift the diesel particle filter,
put it to installing position,
Tool:
install the bracket bolts and
pre-tighten the clamp. Open-end
wrench 11#
Open-end
wrench 18#
Traveling crane
Wire rope with
hooks
P18P00107

2. Adjust the diesel particle fil-

ter position, and tighten the
clamp.

P18P00108
2-72
Removal and Installation January 24, 2017
Removal and installation of DPF (Diesel Particle Filter) CLG835H

Figures Contents Tools

3. Insert the exhaust pipe into
SCR outlet port, tighten the
clamp and U-clamp, and
insert the electric connector.

Tool: Open-end
wrench 11#

P18P00109

4. Connect the DEF pipe, and

insert the electric connector.

P18P00110

5. Install the engine hood and

top cover according to
removal and installation
requirements and steps of
engine hood.
6. Fix the exhaust pipe to the
engine top cover.

Tool:
Open-end
wrench 13#

P18P00102
 2-73
January 24, 2017 Removal and Installation
CLG835H Removal and installation of DEF pump

Removal and installation of DEF pump

Removal

Figures Contents Tools

1. Stop the vehicle, and turn off
the negative electrode
switch, and hang on a "No
operating" warning board
when the urea pump stops
operating.

P18P00112
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P18P00060

2. Open the engine hood, and

remove the protection plate
from the fuel tank.

Tool:
Open-end
wrench 13#

P18P00114
2-74
Removal and Installation January 24, 2017
Removal and installation of DEF pump CLG835H

Figures Contents Tools

3. Unscrew the clamp of urea
pipe with straight screw-
driver, and then pull out the
pipe from the urea tank.
Seal every port with plastic Tool:
sealing membrane as Straight screw-
required. driver
Plastic sealing
membrane

P18P00115

4. Remove the 4 captive bolts

from the DEF bracket, and
take out the DEF tank from
the counterweight bottom.

Tool:
Open-end
wrench 13#

P18P00116

5. Unscrew the mounting strap

bolt of the DEF tank and the
tank can be taken out.

Tool:
Open-end
wrench 10#

P18P00117
 2-75
January 24, 2017 Removal and Installation
CLG835H Removal and installation of DEF pump

Installation

Figures Contents Tools

1. Put the DEF tank into the
bracket, get the strap
through the tank body and
tighten the strap bolt.
Tool:
Open-end
wrench 10#

P18P00117

2. Put the DEF tank into install-

ing position from the coun-
terweight bottom and tighten
the 4 captive bolts

Tool:

P18P00116

3. Insert the quick joint of urea

pipe to the joint of urea tank.
It is not in place until a
sound is heard. The two
joints is different in specifica-
tion, and can not be inserted
if inversely connected.

Tool:

P18P00120
2-76
Removal and Installation January 24, 2017
Removal and installation of DEF pump CLG835H

Figures Contents Tools

4. Connect the water pipe to
the water pipe joint of urea
tank, and clamp it with
clamp. The pipe connected
to solenoid water valve is
inlet pipe, which is con-
nected to the water inlet on Tool:
the urea tank with arrow
indicated. Straight screw-
driver

P18P00121

5. Insert the urea filler to the

urea tank and clamp it with a
clamp.

Tool:
Straight screw-
driver

P18P00122

6. Insert the DEF(diesel

exhaust fluid) tank joint to
the vehicle wiring harness.

P18P00123
 2-77
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of DEF tank

Figures Contents Tools

7. Put on the fuel tank protec-
tion plate and tighten with
bolts.

Tool:
Open-end
wrench 13#

P18P00124

Disassembly and assembly of DEF tank

Disassembly

Figures Contents Tools

1. Unscrew the retention
screws that secure the
Retaining Ring to the reser-
T25 Driver voir.

tool:
T25 Torx Driver

Retention
Screws

P18P00125
2-78
Removal and Installation January 24, 2017
Disassembly and assembly of DEF tank CLG835H

Figures Contents Tools

P18P00126

2. Using a flathead screw-

driver, gently pry around
where the head unit is con-
nected to the reservoir while
simultaneously pulling on
the top of the unit. Continue
until DEF mounting base is
free from reservoir. tool:
DO NOT pull on the wires or
flathead screw-
fittings.
driver

P18P00127
 2-79
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of DEF tank

Figures Contents Tools

3. Pull the DEF head unit out
until the bottom of the
header is at the bottom of
the tank bore.

P18P00128

P18P00129
2-80
Removal and Installation January 24, 2017
Disassembly and assembly of DEF tank CLG835H

Figures Contents Tools

4. Angle the heel of Tri-function
sensor foot upward and
rotate the header until the
bottom of the header is posi-
tioned inside the tank bore.
When the bottom of the
header is in the tank bore,
fold the filter downward
towards the interior of the
tank. Continue to carefully
remove the header out of
the tank bore until com-
pletely freed. 
P18P00130
DO NOT pull directly out as
this might damage the DEF
head and bore seal.

P18P00131
 2-81
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of DEF tank

Check

Check the surface of filter element, and clean it if has sundries. If the filter element is found with cracks
or big hole, replace it with new one.

Assembly

Figures Contents Tools

1. Apply a thin layer of O-ring
lubrication to the Bore seal
O-ring.

P18P00132

2. Fold the Filter element in

half towards the bottom of
the Tri-Function Sensor. Tilt
the header to an approxi-
mate 45° angle, with respect
to the top of the tank. With
the heel of the Tri-Function
Sensor foot angled upward,
place the filter edge and the
toe of the Tri-Function Sen-
sor into the tank bore. Grad-
P18P00133
ually work the bottom
portion of the DEF head into
the Bore opening until com-
pletely inserted in the tank.
DO NOT push the MFHU
directly into the tank as this
could damage the unit.
2-82
Removal and Installation January 24, 2017
Disassembly and assembly of DEF tank CLG835H

Figures Contents Tools

P18P00134

P18P00135

3. Position the DEF head unit

in the desired orientation
and press on the top of the
blue mounting base until it is
completely seated in the
tank bore. 
DO NOT press directly on
the fittings.

P18P00136
 2-83
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of DEF tank

Figures Contents Tools

4. Position the retaining ring on
Head unit and install the
retention screws using the
T25 Torxwrench. Recom-
mended torque on screws is
20 - 30 in-lbs (2.26 – 3.38 N
m).

P18P00137

Tool:
T25 Torx wrench

P18P00138
2-84
Removal and Installation January 24, 2017
Removal and installation of DEF(diesel exhaust fluid) pump CLG835H

Removal and installation of DEF(diesel exhaust fluid) pump

Removal

Figures Contents Tools

1. Write 1, 2, 3 on the stickers
respectively and stick them
on the three DEF pipes from
left to right. Pull out the urea
pipe, harness connector Tool:
from the urea pump. Seal
every port with plastic seal- Plastic sealing
ing membrane. membrane
Sticker

P18P00139

2. Unscrew the urea pump

mounting bolt from the
bracket. Then remove the
urea pump.

Tool:
Wrench 13#

P18P00140
 2-85
January 24, 2017 Removal and Installation
CLG835H Removal and installation of DEF(diesel exhaust fluid) pump

Installation

Figures Contents Tools

1. Fix the urea pump on the
bracket and tighten it with
bolts. The recommended
tightening torque is 15.2 –
22.8 N·m.
Tool:
Wrench 13#

P18P00141

2. Insert the three urea pipes to

the urea pump by the order
1, 2, 3 from left to right until
a sound is heard. Insert the
urea pipe joint to the position
of urea pump joint.

P18P00142
2-86
Removal and Installation January 24, 2017
Disassembly and assembly of DEF pump CLG835H

Disassembly and assembly of DEF pump

Disassembly

Figures Contents Tools

1. Unscrew the filter element
cover by hand.

P18P00143

2. Take out the filter element

assembly upward and verti-
1 cally.
2

1.Filter element cover 3.Housing

2.Filter element
P18P00144
 2-87
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of DEF pump

Check

Figures Contents Tools

1. Check the filter element
cover for cracks or hole.
1 These cracks or holes may
cause urea leakage.
2 Check the thread of filter
element cover for damage,
and if does, replace it with a
new one.
Check the thread of urea
3 pump body. If the thread is
damaged, replace the com-
plete urea pump.

1.Filter element cover 2. Filter element 3. Housing

P18P00145

2. Clean the filter element

cover with warm water and
1 soft gauze.

1.Filter element cover 2. Filter element 3. Housing

P18P00146
2-88
Removal and Installation January 24, 2017
Disassembly and assembly of DEF pump CLG835H

Assembly

Figures Contents Tools

1. Install the filter element
assembly into the DEF
pump housing with filter ele-
1 ment assembly tightening
torque 14N.M(124lbin), and
2
then tighten the protective
cover.

Tool:
3
Open-end
wrench 27#

1.Filter element cover 3. Housing

2 Filter element P18P00147

2. Turn on the negative (-)

switch and start the engine,
check the urea pump for
leakage. If there is leakage,
please refer to the above
steps of disassembly and
inspection.
 2-89
January 24, 2017 Removal and Installation
CLG835H Removal and installation of radiator

Removal and installation of radiator

Removal

Graph Contents Tools

1. Turn off the negative elec-
trode switch, and hang on a
"No operating" warning
board.

P18P00148
G
IN
N
AR
W

er ot
op o n

e
at
d
r:
te
ra
pe
O

e:
at
D

P18P00060

2. Remove the engine hood

and top cover according to
removal and installation
requirements and steps of
engine hood.
3. Unscrew the drain connector
to drain the engine cooling
water.

Tool:
Open-end
wrench 36#
Water tank

P18P00150
2-90
Removal and Installation January 24, 2017
Removal and installation of radiator CLG835H

Graph Contents Tools

4. Unscrew the hydraulic oil
drain connector to drain the
hydraulic oil in the radiator.

Tool:
Open-end
wrench 36#
Oil tank

P18P00151

5. Unscrew the torque con-

verter oil drain connector to
drain the torque converter oil
in the radiator.
Tool:
Open-end
wrench 36#
Oil tank

P18P00152

6. Unscrew the clamp of inter-

cooler pipe, unplug the sili-
cone hose at radiator side
and seal every port with
plastic seal membrane. Tool:
Open-end
wrench 12#
Plastic sealing
membrane

P18P00153
 2-91
January 24, 2017 Removal and Installation
CLG835H Removal and installation of radiator

Graph Contents Tools

7. Unscrew the water pipe
clamp and pull out the water
pipe from the radiator. Seal
every port with plastic seal-
ing membrane.

Tool:
Open-end
wrench 8#
Plastic sealing
membrane

P18P00154

8. Remove the oil inlet/return

pipes of the torque converter
oil radiator & drain pipe joint,
unplug the temperature sen-
sor connector and seal each
port with plastic seal mem-
brane.

Tool:
P18P00155 Outer hexagon
wrench 8#
Plastic sealing
membrane

P18P00156
2-92
Removal and Installation January 24, 2017
Removal and installation of radiator CLG835H

Graph Contents Tools

9. Remove the oil inlet/return
pipe joints of the hydraulic
oil radiator and drain pipe
joint, unplug the temperature
Tool:
sensor connector and seal
each port with plastic seal Open-end
membrane. wrench
Plastic sealing
membrane

P18P00157

10. Remove the oil inlet/return

pipe connectors of the fuel
radiator and seal each port
with plastic seal membrane.

Tool:
Open-end
wrench
Plastic sealing
membrane

P18P00158

11. Remove the condensing

agent inlet/outlet connec-
tors of the A/C radiator, and
seal each port with plastic
Tool:
seal membrane.
Open-end
wrench
Plastic sealing
membrane

P18P00159
 2-93
January 24, 2017 Removal and Installation
CLG835H Removal and installation of radiator

Graph Contents Tools

12. Remove the oil inlet/outlet/
return pipe connectors of
cooling motor and seal each
port with plastic seal mem-
Tool:
brane.
Open-end
wrench
Plastic sealing
membrane

P18P00160

13. Slowly operate traveling

crane, hang lifting eyes with
wire rope, and tauten wire
rope but not lift yet.

Tool:
Traveling crane
Wire rope

P18P00161

14. Remove 4 anchor captive

bolts from the radiator
assembly.

Tool:
Open-end
wrench 24#
Traveling crane

P18P00162
2-94
Removal and Installation January 24, 2017
Removal and installation of radiator CLG835H

Graph Contents Tools

15. Uplift the traveling crane, lift
out the radiator assembly
slowly and put it on flat
ground.

Tool:
Traveling crane

P18P00163

Installation

Graph Contents Tools

1. Uplift the traveling crane, lift
the radiator assembly to
installing position.

Tool:
Traveling crane
Wire rope

P18P00164

2. Tighten the radiator mount-

ing bolts with the tightening
torque 305 ± 25N.m.

Tool:
Open-end
wrench 24#

P18P00165
 2-95
January 24, 2017 Removal and Installation
CLG835H Removal and installation of radiator

Graph Contents Tools

3. Loose the wire rope

Tool:

P18P00166

4. Install the oil inlet/outlet/

return pipe connectors of
cooling motor

Tool:
Open-end
wrench

P18P00167

5. Install the condensing agent

inlet/outlet connectors of the
A/C radiator.

Tool:
Open-end
wrench

P18P00168
2-96
Removal and Installation January 24, 2017
Removal and installation of radiator CLG835H

Graph Contents Tools

6. Install the oil inlet/outlet con-
nectors of fuel radiator.

Tool:
Open-end
wrench

P18P00169

7. Install the oil inlet/return

pipes of the hydraulic oil
radiator & drain pipe joint,
insert the temperature sen-
sor connector.
Tool:
Open-end
wrench

P18P00170
 2-97
January 24, 2017 Removal and Installation
CLG835H Removal and installation of radiator

Graph Contents Tools

8. Install the oil inlet/return
pipes of the torque converter
oil radiator & drain pipe joint,
insert the temperature sen-
sor connector.

P18P00171 Tool:
Open-end
wrench

P18P00172

9. Insert the water inlet/ outlet

pipes into the water radiator
about 50mm, and then
clamp the water pipe with
clamp.

Tool:
Open-end
wrench 8#

P18P00173
2-98
Removal and Installation January 24, 2017
Removal and installation of radiator CLG835H

Graph Contents Tools

10. Connect the intercooler pipe
and air-air intercooler with
silicone hose and then
clamp it with a clamp.

Tool:
Open-end
wrench 12#

P18P00174

11. Tighten the radiator water

draining switch, torque con-
verter oil draining switch and
hydraulic oil draining switch.

Tool:

P18P00175

12. Replenish the coolant,

hydraulic oil and torque con-
verter oil as required.
13. Install the engine hood and
top cover according to
removal and installation
requirements and steps of
engine hood.
 2-99
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of radiator

Disassembly and assembly of radiator

Disassembly

Graph Contents Tools

1. Unscrew the 4 fixing bolts on
the upper connecting plate,
remove the bolts and con-
necting plate.

Tool:
Open-end
wrench 16#

P18P00176

2. Unscrew 4 captive bolts (do

not remove) of lower con-
necting plate, so that left and
right supports and lower
connecting plate can rotate
relatively.

Tool:
Open-end
wrench 18#

P18P00177
2-100
Removal and Installation January 24, 2017
Disassembly and assembly of radiator CLG835H

Graph Contents Tools

3. Push the radiator to right by
1 3 4 the order 4321 with the aid
2
of straight screwdriver, suc-
cessively take out torque
converter oil radiator, air-air
intercooler, water radiator
and hydraulic oil cooler and
collect sponge and shock
absorber. Tool:
CAUTION: Hold radiator Straight
assembly by someone or screwdriver
use corresponding stabilizing
equipment to prevent radiator
components from tilting when
above 1, 2 and 3 operations
are carried out.
1. Hydraulic oil cooler 3. Air-air intercooler
2. Water radiator 4. Torque converter oil cooler
P18P00178

Check

Check the radiator passage wall for cracks, and if does, it is necessary to perform the repair welding and
replace the radiator.
Check the radiator fin, and if the fin is bent for a large area and blocks the passage, it is necessary to flat
the fin by the wind direction or replace the radiator.
Check the radiator passage for blocking by debris or impurities, and if does, it is necessary to blow it
clean with compressed air. Please notice that the direction of compressed air shall be inverse with that of
air which passed through the radiator during normal operation of the machine.
 2-101
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of radiator

Assembly

Graph Contents Tools

1. Connect the left and right
supports to the lower con-
necting plate with bolts, but
not tighten the bolts, so that
left and right supports and
lower connecting plate can
rotate relatively, and place
the sponge on the lower
backing plate.

P18P00179

2. Put the shock cushions to

the lower plate holes and
insert the radiator to the
lower plate holes rightly.
Perform the same assembly
method for the other radia-
tors.

P18P00180
2-102
Removal and Installation January 24, 2017
Disassembly and assembly of radiator CLG835H

Graph Contents Tools

3. Put the shock cushion on
top of radiator to the radiator
and put the sponge.

Tool:
Open-end
wrench 16#

P18P00181

4. Install the upper plate and

tighten the 4 captive bolts of
the upper and lower con-
necting plates.
CAUTION: The radiator
assembly shall be held
by someone or using
corresponding stabilizing Tool:
equipment to prevent radiator
Open-end
assembly from tilting when
wrench 18#
above 1, 2, 3, 4 operations are
carried out.

P18P00182
 2-103
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fan

Removal and installation of fan

Removal

Graph Contents Tools

1. Turn off the negative elec-
trode switch, and hang on a
"No operating" warning
board.

P18P00183
G
IN
N
AR
W

er ot
op o n

e
at
d
r:
te
ra
pe
O

e:
at
D

P18P00060

2. Open engine hood

2-104
Removal and Installation January 24, 2017
Removal and installation of fan CLG835H

Graph Contents Tools

3. Unscrew the mounting bolt
of shield and remove the
shield.

Tools
Open-end
wrench 16#

P18P00185

4. Unscrew the mounting bolt

of fan, catch the root of fan
vane and shake slightly to
make the fan separate from
the flange plate and then
remove the fan.

Tools
Open-end
wrench 10#

P18P00186
 2-105
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fan

Installation

Graph Contents Tools

1. Install the fan to the flange
with the inner side (concave
side) of arc surface of fan
facing the rear of complete
machine.

P18P00187

Exterior (convex)
x)
IInterior (concave)

P18P00188
2-106
Removal and Installation January 24, 2017
Removal and installation of fan CLG835H

Graph Contents Tools

2. Fix the fan on the flange with
bolts.

Tools
Open-end
wrench 10#

P18P00189

3. Measure clearances
between fan and shroud and
it should be more than
10mm(0.3937In).

Tools
Steel ruler

1. Clearance between fan and shroud >10mm

P18P00190
 2-107
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fan

Graph Contents Tools

4. Install the shield to the
shroud and tighten it with
bolts.

Tools
Open-end
wrench 16#

P18P00191

5. Measure clearances
between fan and shield and
1 it should be more than
20mm (0.7874In).
2

>20mm
Tools
Steel ruler

1. Edge of the fan

2. Shield inner side

P18P00192

Check

Check the fan vane for damage or scratches, the connection of fan vane and fan & hub for cracks, and if
the fan is damaged, it is necessary to replace it with a new one with the same part number.
2-108
Removal and Installation January 24, 2017
Removal and installation of fuel tank CLG835H

Removal and installation of fuel tank

Removal

Graph Contents Tools

1. Drainage of diesel fuel:
Clean drain hole of fuel tank,
place a clean oil container
under the fuel tank, and
unscrew drain plug. After
fuel is drained, fix drain plug
back to fuel tank. Drained Tool:
fuel should be strictly sealed 24# socket,
for preservation to prevent socket wrench,
pollution to fuel. oil tank

P18P00193

2. Removal of pipe clamp:

Remove all of hydraulic pipe Tool:
or electric harness bolts, Open-end
remove clamps, and loose wrench 16#, 18#
the pipes and harness.
3. Remove the fuel lines of
suction and return port:
After fuel is drained, remove
screw of fuel hose at fuel
tank end, take down fuel
hose of that end, and fix the Tool:
screw back to fuel return
Open-end
hole. Block the fuel hose
wrench 19#
with clean plastic bag.

P18P00196
 2-109
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fuel tank

Graph Contents Tools

4. Removal of fuel sensor wire
harness:
Remove the harness con-
nector of fuel tank sensor.

P18P00197

5. Removal of fuel tank:

Remove the 4 mounting
bolts and nuts from the fuel
tanks.
Caution: Fuel tank is
connected to frame
through bolts and nuts in four
mounting points. After mount- Tool:
ing bolts are loosened, fuel
tank will separate from frame. Open-end
Before removal, use a reliable wrench 30#,
tool (e.g., forklift) with suffi- Carrier tool or
cient bearing capacity to sup- tooling
port fuel tank.
Before step 5, make sure
steps 2~4 have been done;
otherwise, corresponding
parts will be damaged, and
even a safety accident will
P18P00198 occur.
2-110
Removal and Installation January 24, 2017
Removal and installation of fuel tank CLG835H

Graph Contents Tools

P18P00199

P18P00200
 2-111
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fuel tank

Installation

Graph Contents Tools

1. Install the cushion to the four
brackets of diesel fuel tank.

P18P00201

2. Transfer the diesel fuel tank

to the position under the rear
frame with carrier tool to
align the hole of diesel fuel
tank with the diesel fuel tank
mounting hole on the rear
frame. Fix the diesel fuel
tank on the rear frame with
bolts, hard washer, locknut Tool:
with the tightening torque of Open-end
fuel tank mounting bolt of wrench 30#,
600 ± 50N•m (60 ±
5kgf.m). Carrier tool or
tooling

P18P00202

3. Connect the fuel level sen-

sor harness connector to the
complete machine harness.

P18P00203
2-112
Removal and Installation January 24, 2017
Removal and installation of fuel tank CLG835H

Graph Contents Tools

4. Install the fuel pipe to the
flange of the diesel fuel tank
with screw, seal gasket.

Tool:
Open-end
wrench 19#

P18P00204

5. Fix all of the hydraulic pipe

or electric harness with Tool:
clamps to corresponding Open-end
positions, tighten and finish wrench 16#, 18#
the fixing.
6. Refill the fuel.

Cleaning

Remove the flange cover of washing port on the front end of fuel tank, use clean fuel to wash the inner
oil tank surface. Unscrew drain plug at bottom of fuel tank to drain fuel (use a proper container to collect
fuel). Rinse it by fuel repeatedly until the drained fuel is clean. Put drain plug back onto the floor of fuel
tank.
 2-113
January 24, 2017 Removal and Installation
CLG835H Removal and installation of fuel tank

Removal and installation of fuel radiator

Removal

Figures Contents Tools

1. Unscrew the fuel pipe joint
screw connected to the fuel
radiator with wrench.
Remove the screw, seal Tool:
gasket and keep them in a
plastic bag. Mask the fuel Open-end
pipe joint with sealing mem- wrench 19#
brane. Plastic sealing
bag
Plastic sealing
membrane

P18P00207

2. Unscrew the mounting bolt

of fuel radiator with wrench
and remove the fuel radiator.

Tool:
Open-end
wrench 16#

P18P00208
2-114
Removal and Installation January 24, 2017
Removal and installation of fuel tank CLG835H

Installation

Figures Contents Tools

1. Install the fuel radiator on
the support and tighten it
with bolts.

Tool:
Open-end
wrench 16#

P18P00209

2. Install the fuel pipe joint on

the fuel radiator with screw,
and please notice that the
joint shall be added with seal
gasket at both sides.

Tool:
Open-end
wrench 19#

P18P00210

Check

1. Check the fuel radiator, and if the radiator fin is blocked with dirt, please clean it with compressed air.
2. Check the fuel radiator, and if the fuel pipe is found damage, replace it with a new one.

Test Requirements

1. When the fuel radiator is installed, start the machine to allow it run for several minutes, observe the
radiator for leakage.
2. If the leakage occurred at joint, there is a possibility that the screw is not tightened or the seal gasket
is damaged, and it is necessary to tighten the screw or replace the seal gasket. If the leakage
occurred at radiator itself, there is a possibility that the fuel line is damaged and it is necessary to
replace the radiator with a new one.
 2-115
January 24, 2017 Fault Diagnosis and Troubleshooting
CLG835H Precautions for fault diagnosis

Fault Diagnosis and Trouble-

shooting

Precautions for fault diagnosis

Park the machine on the flat ground, check

whether the locking pin, cushion block and park-
ing brake are fixed firmly.
When two or more workers are operating, follow
the agreed signal strictly, and any unauthorized
people are not allowed to get close.
If the radiator cover is removed when the engine
is still hot, the hot coolant may spray out which
will cause scald. Therefore, start the fault diagno-
sis when the engine is cooled.
Specially notice that do not touch any hot compo-
nents or do not be jammed by any rotating com-
ponents.
When disconnecting the wire, be sure to discon-
nect the negative pole (-) of the battery first.
Be sure to release the inner pressure when
removing the plug or cover where the oil pres-
sure, water pressure or air pressure may exist.
When installing the measuring device, make
sure that it is connected correctly.

Common fault code and trouble-

shooting

For common fault codes and troubleshooting,

refer to Troubleshooting Manual of Perkins
Engine1204F-E44TA&1204F-E44TTA.
2-116
Fault Diagnosis and Troubleshooting January 24, 2017
Common fault code and troubleshooting CLG835H
 3-1
January 24, 2017 Power Train System
CLG835H

Power Train System

Basic Information ............................................................................................................3-3
Safety .....................................................................................................................................................3-3
System composition and position ..........................................................................................................3-4
System technical parameters.................................................................................................................3-5
System schematic diagram and working principle description...............................................................3-6
Overview of transmission fluid ...............................................................................................................3-7
Maintenance and replacement of gearbox and drive axle oil.................................................................3-8
Universal tool, tooling list .....................................................................................................................3-10
Special tool, tooling list ........................................................................................................................3-10

Structure Function Principle ........................................................................................3-11

Torque Converter - Gearbox System ...................................................................................................3-11
Drive axle system.................................................................................................................................3-17
Drive Shaft System ..............................................................................................................................3-19
Tire&rim system ...................................................................................................................................3-21

Testing and adjustment ................................................................................................3-25

Torque Converter - Gearbox System ...................................................................................................3-25
Drive axle system.................................................................................................................................3-25

Removal and Installation ..............................................................................................3-26

Removal and installation of torque converter-gearbox system ............................................................3-26
Disassembly and assembly of torque converter-gearbox assembly ....................................................3-38
Removal and installation of drive shaft system ....................................................................................3-39
Removal and installation of front axle assembly ..................................................................................3-44
Removal and installation of rear axle assembly...................................................................................3-47
Disassembly and assembly of the drive axle .......................................................................................3-60

Fault Diagnosis and Troubleshooting Methods .........................................................3-61

Testing and adjustment ................................................................................................3-63
Power Train Test..................................................................................................................................3-63
3-2
Power Train System January 24, 2017
CLG835H
 3-3
January 24, 2017 Basic Information
CLG835H Safety

Basic Information

Safety This word means existing potential danger,

and if no avoidance, it may cause slight or
Many accidents in operation, maintenance, medium personal injury.
repair and other aspects are caused by fail to "Caution" is also used for reminding the
observe the basic safety rules and precautions. If safety attentions of unsafe operation possi-
the case of potential risk is fully aware in bly causing personal injury. "Danger" repre-
advance, these accidents usually can be sents the worst dangerous conditions. Safety
avoided. The operators must pay attention to sign of "danger" or "warning" is an attach-
these potential risks, and be trained for relevant ment set at the specific dangerous location.
skills before properly and safely operating, General precautions are listed on the safety
maintaining and repairing the machine. sign of "Caution".
● Any improper operation, maintenance and In addition, please carefully follow the "Cautions"
repair methods may lead to hazardous condi- listed in this Manual, otherwise, it may result in
tion, cause personal injury and even death. great damage to the machine. We are unable to
● Be sure to read and understand the relevant enumerate all the possible risks (including
security measures and precautions before potential dangers), and the warnings in the
operating, maintaining and repairing the Manual and product do not cover all the risks and
machine. dangers. If the tools, operation procedures,
methods or techniques are not specially
● Please strictly obey the safety warning infor- recommended by our company, it is necessary to
mation listed in this Manual and on the ensure the personal safety of every one, and
machine during operating, maintaining and protect the machine against any damage.
repairing the machine, otherwise heavy casu-
alties will occur. The contents herein are provided based on the
status of the machine at the time when the
Safety warning information in the Manual is Manual was written, whereas, all products are
indicated by the following symbols updating, and this machine is no exception. Any
modification will influence the operation,
maintenance and repair of the machine,
therefore, please contact the LiuGong dealers for
This word means existing potential danger, latest and most comprehensive service
and if no avoidance, it may cause death or information before operating, maintaining and
serious personal injury. repairing the machine.

This word means danger will occurred imme-

diately, and if no avoidance, it may cause
death or serious personal injury.
3-4
Basic Information January 24, 2017
System composition and position CLG835H

System composition and position

The power train system is a critical part of a loader, like a heart, and it is located at portion between the
engine and tire, as shown in red in the figure below. It mainly consists of three majority components:
gearbox, drive shaft and drive axle.
Fig 3-1 Schematic diagram of position for wheel loader

P18T00001

System technical parameters

Main technical parameters for the power train system of this machine are listed in Table 3-1.
Table 3-1: Main technical parameter table for power train system

System components Items Parameters Remarks

Model ZF 4WG158
Type Fixed shaft type
Gear box
Full-auto electro hydraulic
Control mode
control
Torque converter Type Single-turbo, three-element
Spiral gear level-I reduction,
Drive mode
Drive axle wheel planetary gear reduction
Brake mode Wet brake
 3-5
January 24, 2017 Basic Information
CLG835H System schematic diagram and working principle description

Table 3-1: Main technical parameter table for power train system

System components Items Parameters Remarks

Tubeless bias tire or tubed bias
Tire structure Radial tire
tire is optional
Tire Specification 17.5R25 two star L3
Level \
Type of tread L-3 Ordinary block
Rim Specification 25-14.00/1.5

System schematic diagram and working principle description

The torque converter -gearbox assembly equipped in this machine is ZF 4WG158 full auto type, and the
drive axle is 30 wet axle, whose structure diagram are shown as below:
Figure 3-2 Diagram for gear box assembly composition

1 2 3 4 3

14

13 6

12
7
11
8
10

9 P18T00002

1. Coupling device 8. Output plate

2. Torque converter housing 9. Nameplate
3. Lifting eye 10.Output flange
4. Control harness interface 11.Speed sensor
5. Electro-hydraulic shift control valve 12.Oil outlet of torque converter
6. Suction tube 13.Torque converter outlet oil temperature sensor
7. Brake 14.Cover
3-6
Basic Information January 24, 2017
System schematic diagram and working principle description CLG835H

Fig 3-3 Structure diagram for drive axle assembly

Axle housing bevel gear of the wheel reduction half shaft

P18T00003

As shown in the above figure, the engine is coupled with the torque converter of the torque converter-
gear box assembly, a part of engine power is used to drive the torque converter to work and another part
is used to drive the hydraulic pump so as to provide power for the hydraulic system.
When the engine works together with torque converter, the engine output power is input into the gear
box via the torque converter. Under the control of its electro-hydraulic shift control valve, the gear box
can output power and speed at different positions with gear shafts and clutches.
The power output from the gear box is transmitted to the main drive of drive axle via a drive shaft, and
then transmitted to wheel reducer by left and right axle shafts via main drive differential, and further to
tire rim assembly by decelerating and increasing torsion, thus finally to drive the loader to travel and
work.
 3-7
January 24, 2017 Basic Information
CLG835H System schematic diagram and working principle description

Overview of transmission fluid

The oil product used for wheel loader is divided into four categories, i.e. the lubricant, grease, brake fluid
and fuel, each of which can play a different role in the use of loader.
The lubricant, used in the loader, has two effects , one is to lubricate the parts and reduce the pressure,
so as to prolong the service life of parts; the other is to dissipate the heat of parts produced by friction, so
as to make the parts work normally. The lubricant is composed of various petroleum-based additives.
The wheel loader use a kind of lubricant which has four classes , i.e, diesel oil, gear oil, hydraulic drive
shaft and hydraulic fluid. The applications of the lubricant used in the power train system of this machine
are shown in the table below:
Table 3-2 Table of lubricant application

Cate- Ambient temperature Recommended

Application parts
gory -40 -30 -20 -10 0 10 20 30 40 50 brand

Mobil Delvac Super 1300 ZF torque converter &

engine oil transmission assembly
Torque
(-15°C~+50°C)\ uses SAE 15-40 in gen-
converter
(-5°F~122°F) eral areas and in hot
- gearbox
Mobil ATF 220 desert areas; and uses
assembly
(-35°C~+50°C)\ Mobil ATF220 in arctic
(-31°F~122°F) areas.
Mobil gear oil 80W-90/LS
with additives
LiuGong axle uses SAE
(-15°C~+50°C)\
80W-90/LS in general
(-5°F~122°F);
and hot areas, and Mobil
Mobil gear oil 424
424 with additives and
(-40°C~+50°C) \
Gear oil Shell SPIAX S6 AXME
(-40°F~122°F)with addi-
75W-90/LS in arctic
tives
areas.
Shell SPIAX S6 AXME
LS means the additives
75W-90/LS
are inclusive
(-40°C~+50°C)\
(-5°F~122°F)
3-8
Basic Information January 24, 2017
Maintenance and replacement of gearbox and drive axle oil CLG835H

Maintenance and replacement of 2) After the Oil sump tank of the gear box com-
pletely gets empty, wipe clean the mating
gearbox and drive axle oil surface on drain plug and gearbox housing
that contacting with O ring of the oil drain
The oil product added to the torque converter - plug. After the O-ring of the oil drain plug is
gearbox assembly must be consistent with oil list replaced, reassemble and tighten it.
TE-ML 03 recommended by ZF, the oil level shall 3) Add the oil in accordance with the oil list TE-
be checked once a week by the following ML 03 as recommended by ZF;
methods:
4) Check the oil level by the method as speci-
1) Park the machine on level ground; fied for transmission.
2) Place the gear box gear in the neutral posi- The fine oil filter is also replaced every time the
tion; oil change is done for the gear box. The oil filter
3) Torque converter - gearbox oil is at 80- may be installed by the following method:
95°C\176°F~203°F; 1) Apply a small amount of the gear box oil on
4) The engine is idling 800rpm); the oil seal of oil filter;
5) Observe the oil level gauge of gearbox and 2) The oil filter is screwed in until the oil seal of
it shall be in the "HOT" zone; oil filter contacts the filter head, tighten it 1/3
to 1/2 turn by hand.
After the torque converter and gearbox assembly
co-work for the first 100h, the oil shall be The oil product added in the drive axle must be
replaced every 1000h or at least once a year. Oil in accordance with the oil list of 85W-90 heavy-
can be replaced by the methods as below: load wheel gear oil (GL-5) recommended by
LiuGong. The oil level of LiuGong axle may be
1) Unscrew the drain plug on the torque con-
checked by the following methods:
verter - gearbox assembly to drain the oil.
Figure 3-5 Wheel drain plug and oil level check
plug

The waste oil shall be collected in a container

during oil drainage, in order to avoid environ-
mental contamination;
The oil shall be fully cooled before oil drain-
age, in order to avoid personal injury due to
hot oil splashing onto the body.
Figure 3-4 Gearbox drain plug

P18T00005

P18T00004
P18T00004
 3-9
January 24, 2017 Basic Information
CLG835H Universal tool, tooling list

1) Wheel reducer: place the axle according to the installation position, and turn the hub to keep the oil
level in a horizontal position, fill oil from left and right hubs respectively until the oil overflows the oil
level plug; park the reducer for ten minutes after the drive axle running, and then check the oil level,
and add enough lubricating oil.
Figure 3-6 Bevel gear refuel plug and oil level check plug
Bevel gear refuel plug and oil level check plug

P18T00006

2) Axle housing: the oil is added into axle housing until it overflows from the oil filler.
The axle oil shall be replaced at the first 500h, after that once every 1000h, or at least once a year.

Universal tool, tooling list

For the universal tools, tooling list, please see the torque converter-gear box system, drive axle system
and drive shaft system.

Special tool, tooling list

For the special tool, tooling list, please see "ZF Box Overhaul Manual" for details.
3-10
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

Structure Function Principle Figure 3-8 Structural schematic diagram of

torque converter - gear box assembly
Clutch
Torque Converter - Gearbox Forward KV Clutch K1

System Converter

Input Pump
The torque converter -gearbox system equipped 1. Power Take -OFF
in this machine is ZF 4WG158 full auto type,
which mainly consists of a three-element, single- Clutch K2

turbo torque converter, mechanical gear box with

four forward gears, three reverse gears and Clutch K3
Clutch Reverse KR
electro hydraulic shift control system, as shown
Clutch K4
below: Parking Brake

Figure 3-7 External view of torque converter - LAYSHAFT

gear box assembly Output Output
KV - Gerar Rear Axle Front Axle

Idler Gear
Speedometer Drive
Oil Sump
K4 - Gerar P18T00008

P18T00007
 3-11
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

System technical parameters

The technical parameters of ZF 4WG158 torque converter - gear box assembly in this machine are listed
in Table 3-3.
Table 3-3 Technical parameter table of torque converter - gear box assembly

Remar
Component Items Parameters
ks
Model ZF 4WG158
Type Fixed shaft type
Gears Four forward gears, three reverse gears
Gearbox
Torque converter-gear box assembly
430\ 948.15
Quality (oil not included) /kg\lb
Type of emergence parking brake Shoe brake
Type Single-turbo, three-element
Circulation circle diameter of torque con-
340\ 13.39
verter/mm\In
Torque converter
Inlet pressure of torque converter/MPa\ psi 0.85\ 123.25
Outlet pressure of torque converter/MPa\
0.50\ 72.5
psi
System voltage/V 24
Shift control
Shift control mode Auto electro hydraulic power shift
system
System working pressure/MPa\ psi 1.6+0.2\ 232+29

System schematic diagram and working principle description

The torque converter of this system is a three-element with single-turbo structure, and the diagram for its
structure and working principle is as follows:
Figure 3-9 Structure diagram for torque converter

Turbine wheel
Pump wheel

From the engin

P18T00009
3-12
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

Figure 3-10Schematic diagram for torque converter hydraulic

Hydraulic torque converter

Outlet constant
pressure valve of
torque converter

Inlet constant refined

pressure valve filtration
of torque converter
Radiator

Front pump

Transmission Engine Rough

—shaft lubrication filtration
Tank P18T00010

We can see from structure diagram for torque converter, a three-element, single-turbo torque converter
mainly consists of pump wheel, guide wheel and a turbine. As the pump wheel of torque converter is
directly coupled with and driven by the engine, the hydrodynamic drive oil between pump wheel and tur-
bine forms complex flow under rotation of pump wheel. The mechanical energy is converted into kinetic
energy of oil fluid. The fluid flow with kinetic energy strikes against the turbine at a high speed. The tur-
bine absorbs its kinetic energy and restores it to mechanical energy for gearbox. The guide wheel is sta-
tionary. When the fluid flow(which is from the turbine and has some kinetic energy) passes through the
curved blade of the guide wheel, the torque formed by the impact force and counterforce produced on
the blade acts on the engine base, and equivalent to the sum of increased torque of turbine from coun-
terforce and reduced torque of pump wheel from impact force. It is possible that the output torque of tur-
bine is greater than input torque of pump wheel, based on which, the torque converter is variable.
The working oil of torque converter is imported into the torque converter through the coarse and fine fil-
ters from the oil tank by the variable pump. There is a constant pressure valve (safety valve) set at the
inlet of torque converter, whose main role is to avoid excessive pressure in the torque converter to dam-
age the parts. There is another constant pressure valve (back pressure valve) at the outlet of torque con-
verter, whose main role is to ensure the torque converter is full of working oil in order to avoid cavitation
appeared during operation and impact on the performance of torque converter.
 3-13
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

An electro-hydraulic shift control valve is installed on the gear box assembly, see figure 3 -11 and 3-12
for structure composition and operating hydraulic pressure schematic diagram.
Figure 3-11 Diagram for structure and composition of electro-hydraulic shift control valve

CABLE HARNESS X HOSE LINE FROM

M4 TO REVERSING VALVE

CONTROL PRESSURE
SHIFT VALVE 4
VALVE

REVERSING VALVE
HOSE LINE FROM
M4 TO REVERSING VALVE
REDUCING VALVE

2-STAGE
PRESSURE
CONTROL VALVE PRESSURE CONTROL VALVE

SHIFT VALVE 2
BLEEDER VALVE

RESET VALVE

SHIFT VALVE 1 SHIFT VALVE 5 SHIFT VALVE 3

P18T00011
Figure 3-12 Schematic diagram for hydraulic pressure of torque converter - gear box assembly
OIL CIRCULATION DIAGRAM 4 WG-200 WITH 2-STAGE PRESSURE CONTROL VALVE -VARIANT II -

TABLE -20 NEUTRAL

THE MARKED POSITIONS (e.g.53) CORRESPOND WITH
THE POSITIONS ON THE TABLE -15

DIAGRAM CODE “G”

4 SPEED -VERSION

LEGEND
CONTROL PRESSURE
CONTROL PRESSURE REDUCED
CONTROL PRESSURE MODULATED
CONVERTER INLET PRESSURE
CONVERTER EXIT PRESSURE
LUBRICATION
RETUAN FLOW INTO THE SUMP

P18T00012
3-14
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

The electro-hydraulic shift control valve consists Figure 3-15 Drive line of forward gear 3
of solenoid valves M1, M2, M3, M4, M5, valve
stem and body. When the electro-hydraulic shift ࠰
OUT

control valve is operating, the fluid flow in the Torque

valve stem oil passage is controlled by the power converter
turbine
of solenoid valves, which finally control the
engagement and disengagement of clutch in the
gear box, thus to make the gear box achieve
Input shaft
different shifts. For the power transferring line
and gear engagement with the gear box in
different gears, please see the figure of the
power transferring line for each gear as the
following figure 3-13 to 3-19.
Figure 3-13 Drive line of forward gear 1
OUT
࠰
OUT
Output Output
shaft shaft
Torque
converter P18T00015
turbine
Figure 3-16 Drive line of forward gear 4
Input shaft
࠰
OUT

Torque
converter
turbine

Input shaft

OUT
Output Output
shaft shaft
P18T00013

Figure 3-14 Drive line of forward gear 2

OUT

Output Output
࠰
OUT
shaft shaft
Torque
converter P18T00016
turbine

Input shaft

࠰
OUT
Output Output
shaft shaft

P18T00014
 3-15
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

Figure 3-17 Drive line of reverse gear 1 Figure 3-19Drive line of reverse gear 3

OUT
OUT
Torque Torque
converter converter
turbine turbine

Input shaft
Input shaft

OUT
OUT
Output Output Output Output
shaft shaft shaft shaft

P18T00017 P18T00019

Figure 3-18 Drive line of reverse gear 2

OUT
Torque
converter
turbine

Input shaft

OUT
Output Output
shaft shaft
P18T00018
3-16
Structure Function Principle January 24, 2017
Drive axle system CLG835H

Drive axle system

Composition and position of drive axle system

The basic function of drive axle for wheel loader is to reduce the gear box input speed with main drive
and wheel reducer and increase the torsion, thus to meet the requirements of driving, operating speed
and traction of the base machine. And also, change the straight line motion to vertical-lateral motion via
main drive, so that the drive wheel can be driven to rotate to make the base machine drive along the
straight route. The differential helps balance the speeds of left and right tires to make sure the machine
can still drive when the driving resistances on both sides are different.
In addition to basic features of drive axle for wheel loader, it is also a load-bearing unit for complete
machine, a support device for road wheel and mounting & support device for service brake. The drive
axle system mainly consists of front axle, rear axle and brake lines. The swing axle also includes front,
rear swing brackets, support shaft and other parts.

System technical parameters

Major technical parameters for the drive axle system of this machine are listed in Table 3-4.

Table 3-4 Main technical parameter table for drive axle

System components Items Parameters Remarks

Spiral gear level-I reduction, wheel
Drive mode
planetary gear reduction
Front axle
Brake mode Built-in wet multi-plate type
Brake pressure /MPa\psi 1450
Spiral gear level-I reduction, wheel
Drive mode
planetary gear reduction
Rear axle
Brake mode Built-in wet multi-plate type
Brake pressure /MPa\psi 1450
 3-17
January 24, 2017 Structure Function Principle
CLG835H Drive axle system

System schematic diagram and working

principle description Figure 3-21 Diagram of the wheel reducer

The drive axle for wheel loader is classified into

two classes, i.e. front axle and rear axle, the
main difference between which is the spiral
directions of the spiral bevel gear pairs in the
main drive. The driving spiral bevel gear of front 1 2
axle is left-handed, and that of rear axle is right-
handed. The structure diagram for bevel gear
3
and wheel reducer of this machine is as shown in
figure 3-20 and 3-21.
4
Figure 3-20 Structure diagram of the bevel gear

5 4 5
2

3
P18T00021
1. Axle shaft 4. Hub
2. Planetary gear 5. Sun gear
3. Brake
1 The bevel gear structure is shown in Figure 3-21.
The bevel gear includes two parts, one is the
bevel gear composed of driving spiral bevel gear
and large size spiral bevel gear; the other is the
differential composed of cross axle and bevel
gear. The power is transmitted to the driving
spiral bevel gear by the gear box through drive
P18T00020
shaft, thus to drive the large size spiral bevel
1. Driving spiral bevel gear 4. Carrier gear with differential to rotate together. The half
2. Axle housing 5. Differential shaft gear of differential passes the power to left/
3. Driven spiral bevel gear
right half shaft which is connected with the
splines, and further to the wheel reducer. The
power is then transmitted to hub and finally to
drive the tire to rotate after further speed
reduction, increasing torsion through wheel
reducer.
3-18
Structure Function Principle January 24, 2017
Drive Shaft System CLG835H

Drive Shaft System

In the wheel loader, the drive shaft system is mainly used to deliver the power between the two con-
nected shafts, of which the relative position changes constantly during operation. Because of the special
transmission characteristics of universal joint, the drive shaft may connect two transmission parts with
nominal concentric axial line. However, an error may occur during installation and axial line deviates
from the original position when operating, the drive shaft is widely used in shoveling transportation
machine.

System composition and position

The drive shaft system of wheel loader is composed by the following two structural types in accordance
with its formal layout, the drive shaft system shown in Figure 3-25 consists of rear and front drive shafts,
the one shown in Figure 3-26 consists of rear, front, intermediate shafts and support assembly.
Figure 3-22 Drive shaft system

1
3

P18T00022
1. Front drive shaft 2. Torque converter-gear box assembly 3. Rear drive shaft

Figure 3-23 Drive shaft system

1 2 4

P18T00023

1. Front drive shaft&support assembly 3. Torque converter-gear box assembly

2. Intermediate drive shaft 4. Rear drive shaft
 3-19
January 24, 2017 Structure Function Principle
CLG835H Tire&rim system

System technical parameters

The technical parameters for the drive shaft system are listed in Table 3-5.

Table 3-5 Technical parameter table for drive shaft system

Parts name Input-end coupling type Output-end coupling type

Rear drive shaft 7C FLANGE 7C FLANGE
Intermediate drive shaft 180 round flange 150 round flange
Front drive shaft&support assembly 150 round flange 150 round flange

Tire&rim system

System composition and position

Tire & rim system are both components bearing weight of a complete machine and direct components
driving the complete machine to walk. Tires can be classified into bias tires with an inner tube, bias tires
without an inner tube, radical tires, solid tires, etc. in accordance with it structural layouts. They can also
be classified into block pattern tires, traction pattern tires, skidding tires, etc. according to pattern form.

System technical parameters

The technical parameters for the tire & rim system equipped in this machine are listed in Table 3-6.

Table 3-6 Technical parameters of tire&rim system

System compo-
Items Parameters Remarks
nents
Tubeless bias tire or tubed bias
Tire structure Radial tire
tire is optional
Specification 17.5R25 two star L3
Level \
Tire Type of tread L-3 Ordinary block
Front wheel:0.55-0.58\79.75-
84.10
Tire pressure (MPa)\(psi)
Rear wheel: 0.52-0.55\75.40-
79.75
Rim Specification 25-14.00/1.5
3-20
Structure Function Principle January 24, 2017
Tire&rim system CLG835H

Common failure modes of tire and reasons

Common failure mode of tire and reasons are as follows:

Typical pictures Failure mode Main reasons

1. Reasons for manufacture:
there is impurities, oil stains
or water in the tread rubber
or cord ply or not firmly com-
pressed when being
molded, or gasoline does
Delaminating of not fully volatilize.
crown 2. Reasons for usage: speed is
too fast (beyond specified
speed), and directive pattern
is traveling in reverse direc-
tion.
P18T00024

1. Reasons for manufacture:

there is impurities, oil stains
or water in sidewall rubber
or cord ply or not firmly com-
pressed, or gasoline does
not fully volatilize.
2. Traveling with insufficient air
Shoulder will intensify wear of tire
delamination shoulders and cause exces-
blasting sive heat, which will sepa-
rate sidewall rubber from
cord ply and cause an explo-
sion when problem gets
worse.

P18T00025
 3-21
January 24, 2017 Structure Function Principle
CLG835H Tire&rim system

Typical pictures Failure mode Main reasons

1. Reasons for manufacture:
there is impurities, oil stains
or water in sidewall rubber
or cord ply or not firmly com-
pressed when being molded
or gasoline does not fully
volatilize.
2. Traveling on uneven road
Delaminating of
with insufficient air or over-
sidewall
load or operating in severe
working conditions will
cause tire body to deform
badly and cause excessive
heat in partial sidewall so
that sidewall peels off or
explodes.
P18T00026

Major reasons: mixing of

extruded tread compound is
uneven, surfaces of semi-
Double skin finished product have impurities,
vulcanization mold has oil
stains, and isolating agent is
unevenly applied.

P18T00027
3-22
Structure Function Principle January 24, 2017
Tire&rim system CLG835H

Typical pictures Failure mode Main reasons

Major reasons: traveling with

too high pressure will cause
Wearing of
earthed area reduction of tire
crown
crown, local load increase and
wear intensification.

P18T00028

Major reasons: during traveling,

outer tube is scratched by
Trauma
pointed objects or is stabbed
evenly by pointed objects.

P18T00029

Major causes: the vehicle

speeds up when steering, the
tire side rubs the roadside
Side trauma obstacles; and installed tire is
stuck with hard objects; the
machinery is damaged during
transportation, installation.

P18T00030
 3-23
January 24, 2017 Testing and adjustment
CLG835H Power Train Test

Testing and adjustment

Power Train Test

Detection point layout of torque converter - gear box assembly as is shown in Figure 3-25, and names
and parameters of each detection point can be found in Table 3-7.
Figure 3-25 Measuring point layout

58

66
63

34
21
57 65

56
53

55 60 51
P18T00123

Table 3-7 Parameter list of the measuring point

S/N of the S/N of the

Name of the measuring Name of the Theoretical
measur- Theoretical value measuring
point measuring point value
ing point point
Input sensor of the gear
21 \ 55 Reverse gear clutch 1.6-1.8MPa
box
Output sensor of the
34 \ 58 Gear 3 clutch 1.6-1.8MPa
gear box
Inlet pressure of torque
51 Opening pressure: 0.85 56 Gear 1 Clutch 1.6-1.8MPa
converter
53 Forward gear clutch 1.6-1.8MPa\232-261psi 57 Gear 2 Clutch 1.6-1.8MPa
Pressure of shift control Outlet pressure of Opening
65 1.6-1.8MPa\232-261psi 63
system torque converter pressure: 0.5
60 Gear 4 Clutch 1.6-1.8MPa\232-261psi

Logical relations between gear states and working conditions of shift control valve solenoid valve can be
found in Table 3-8.
3-24
Testing and adjustment January 24, 2017
Torque Converter - Gearbox System CLG835H

Table 3-8 Logical relations between gear states and working conditions of shift control valve
solenoid valve

Electric condition of the solenoid valve

Sole-
noid Forward gear Reverse gear Neutral gear
valve
1 2 3 4 1 2 3 1 2 3 4
M1 ● ● ●
M2 ● ● ●
M3 ● ● ●
M4 ● ● ● ● ● ●
M5 ●
Clutch KV KV KV K4 KR KR KR
K3
Clutch K1 K2 K3 K3 K1 K2 K3

Remarks: ● means the solenoid valve is Drive axle system

energized;
Test Requirements: 1. Leakage check
Testing dynamic unbalance value Start up the machine, step on the service brake
After the drive shaft is repaired, a professional pedal for several times after the air pressure of
dynamic unbalance test must be performed. energy accumulator gets normal, observe
whether there is sign of leakage at the joint of
steel pipe of front axle brake and service brake
Torque Converter - Gearbox hose.
System 2. Exhaust
Figure 3-24 Rear axle ventilation plug
1. Leakage check
Start up the machine and operate it for several
minutes, observe whether there is sign of
leakage from the hose assembly coupled with
gear box assembly, if so, re-tighten it.
2. Test of gear box shift pressure
Power on the machine, now the oil pressure
warning light of gear box flashes on the
instrument panel, and after startup of machine, P18T00031
the warning light shall go out, if not, inspect the
oil level of gear box once again. 1) Loosen the exhaust plugs at both ends of
axle.
2) Start up the machine and step on the service
brake pedal until the oil overflows from the
exhaust plug.
3) Tighten the exhaust plug.
 3-25
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Removal and Installation

Removal and installation of torque converter-gearbox system

Removal of torque converter - gearbox system

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine and
remove the key.
3. Remove the drain plug of
gear box assembly to drain
the oil.
Caution: The waste oil
shall be recovered in a
container during removal, in
order to avoid environmental
contamination. The removed 34# socket, 13#
hose is shielded to avoid con- socket,
tamination of parts. pneumatic
impact wrench
Danger: It is sure that the
P18T00032 hose pressure is fully
discharged and the oil is
cooled sufficiently before
removal of hose, in order to
avoid personal injury of hose
pressure and hot oil during
removal.
4. Remove the cab assembly
of machine, see section
“Removal and Installation of
Cab” for removal steps.
3-26
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
5. Remove the hose assembly
connecting the oil filter pipe
to the gear box assembly
with wrench.
Caution: The waste oil
shall be recovered in a 41# wrench
container during removal, in
order to avoid environmental
contamination.
P18T00033
The removed hose is shielded
to avoid contamination of
parts.
6. Remove the test line con-
nected to gear box assem-
bly and test hose.

18# Wrench

P18T00034

7. Remove the hose assembly

with a wrench.

41# Wrench

P18T00035
 3-27
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
8. Remove the clamping bolt
fixing the oil filler steel-pipe
with a wrench.

10# Wrench

P18T00036

9. Remove the coupling lock-

nut between rear drive shaft
and rear output flange of
gear box assembly.
Caution: The drive shaft
assembly is composed 18# Wrench
of slidable spline sleeve,
please take care to avoid per-
sonal injury caused by falling
P18T00037
of slide shaft fork during
removal.
10. Remove the coupling lock-
nut between intermediate
drive shaft and front output
flange of transmission
assembly.
21# Wrench

P18T00038
3-28
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
11. Remove the hose assembly
or the hose connected with
hydraulic pump from the
gearbox assembly, and refer
to removal of hydraulic sys-
tem for detailed procedures.

P18T00039

12. Remove the hose assembly

connected with brake sys-
tem from the emergency
parking brake chamber.

24# Wrench

P18T00040

13. Remove the bolts and

washer for attaching the
transmission mount to the
frame with an air gun.
46# wrench, 46#
socket,
pneumatic
impact wrench

P18T00041
 3-29
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
14. Pre-lift the gear box assem-
bly through the lugs with lift-
ing device.

Sling
(2 tons)

P18T00042

15. Remove the cover plate

from the transmission
assembly with a wrench.

13# Wrench

P18T00043

16. Remove the fastening bolts

used to attach the gear box
assembly to the engine fly-
wheel with a wrench.

16# Wrench

P18T00044
3-30
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
17. Remove the fastening bolts
used for attaching the gear
box assembly-torque con-
verter case to the engine
housing with an blower gun 16# socket,
and socket. pneumatic
impact wrench

P18T00045

18. Separate the transmission

assembly from the engine,
and secure the torque con-
verter case and core
through the bolt holes with
ropes and steel wires. Steel wire

P18T00046

19. Lift up the gear box assem-

bly from the machine
through the lugs with the
hoisting device and ropes
and place it in a safe area.

Sling
(2 tons)

P18T00047
 3-31
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Installation of torque converter-gear box system

Tools required
Reference picture Operation step
(Remarks)
1. Wipe clean the drain plug of
gear box, and then install it
in the threaded hole of gear 34# socket, 13#
box and tighten it with a socket,
torque of 600±70Nm\ pneumatic
442.5±51.6 lbf•ft. impact wrench,
open-end 34#
fixed torque
spanner
P18T00048

2. Secure the torque converter

to its housing through
threaded holes with the steel
wire or ropes.
Danger: The torque con-
verter can slide freely on
the guide wheel seat. When Steel wire
lifting up it, the torque con-
verter and its housing must
P18T00049
be secured firmly with the
steel wire or ropes, in order to
avoid personal injury due to
falling of torque converter.
3. Lift up the gear box assem-
bly onto the machine
through the lugs of gear box
assembly with the hoisting
device and ropes.

Sling
(2 tons)

P18T00050
3-32
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
4. Move gear box assembly to
fit it with engine flywheel
housing, and install the bolts
and hard washer used for 16# socket,
tightening the torque con- pneumatic
verter case to the engine impact wrench,
housing and then tighten open-end 16#
them. Tightening torque: fixed torque
72±6Nm\ 53.1±4.4 lbf•ft. spanner

P18T00051

5. Crank the engine flywheel

case to make the torque
converter align with mount-
ing threaded hole on the 16# socket,
engine flywheel, screw and pneumatic
tighten the fastening bolts impact wrench,
and washer for attaching the open-end 16#
torque converter to the fixed torque
engine flywheel by hand spanner
with a torque of 60±5Nm\
P18T00052 44.25±3.7 lbf•ft

6. Install the mounting hole

cover plate on the gear box.

13# Wrench

P18T00053
 3-33
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
7. Screw and tighten the bolts
and washer for fastening the
gear box mount to the frame 46# wrench, 46#
with the torque of socket,
2035±170Nm\ pneumatic
1500.8±125.38 lbf•ft. impact wrench,
open-end 46#
fixed torque
spanner
P18T00054

8. Attach the mounting end

flanges of drive shaft and
gear box to the rear output
flange of gear box, and
tighten the locknut to 18# wrench or
132±10Nm\ 97.35±7.38 open-end 18#
lbf•ft. fixed torque
spanner

P18T00055

9. Attach the intermediate drive

shaft to front output flange of
gear box and tighten the
locknut to 200±15Nm\
147.5±11.06 lbf•ft. 21# wrench or
open-end 21#
fixed torque
spanner

P18T00056
3-34
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
10. Install the oil filler steel-pipe
on the gear box and tighten
the set bolts with a torque of
26±3Nm\ 19.18±2.21 lbf•ft.
13# wrench or
open-end 13#
fixed torque
spanner

P18T00058

11. Install the hose referring to

the hydraulic installation and
hydraulic pump.

P18T00058

12. Install the hose assembly

used for attaching the oil fil-
ter pipe to the gear box, and
the tightening torque of hose
joint is 137±6Nm\ 41# wrench or
101.04±4.43 lbf•ft. open-end 41#
Caution: Two hose fixed torque
assemblies are spanner
respectively connected to the
P18T00059
inlet, outlet of fine oil filter in
directions as required,
avoiding installation error.
 3-35
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
13. Install the hose assembly
used for attaching the radia-
tor pipe to the gear box, and
the tightening torque of hose
joint is 137±6Nm\ 41# wrench or
101.04±4.43 lbf•ft. open-end 41#
fixed torque
spanner

P18T00060

14. Install the hose assembly

used for attaching the test
pipe to the gearbox, as
shown in the following figure
and table.
18# Wrench

P18T00061

Layout of test points of shift control valve

58

66
63

34
21
57 65 P18T00062

56
53

55 60 51

P18T00062
3-36
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
Logic diagram of test points and gear clutch

Theoretical S/N in the corre-

Decal marker Meanings
value sponding valve
PRESSURE OF IN FRONT Inlet pressure of torque Opening pres-
51
OF THE CONVERTER converter sure: 1.1 MPa
PRESSURE OF KV CLUTCH KV clutch pressure 1.6-1.8MPa 53
PRESSURE OF KR CLUTCH KR clutch pressure 1.6-1.8MPa 55
PRESSURE OF K1 CLUTCH K1 clutch pressure 1.6-1.8MPa 56
PRESSURE OF K2 CLUTCH K2 clutch pressure 1.6-1.8MPa 57
PRESSURE OF K3 CLUTCH K3 clutch pressure 1.6-1.8MPa 58
PRESSURE OF K4 CLUTCH K4 clutch pressure 1.6-1.8MPa 59

Mapping diagram of centralized measuring point

mounting plate and measuring point

P18T00063

15. Install the hose assembly

used for attaching emer-
gence parking brake cham-
ber to the brake system, the
tightening torque is 24# wrench or
37±2Nm\ 27.29±1.48 lbf•ft. open-end 24#
fixed torque
spanner

P18T00064
 3-37
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of torque converter-gearbox assembly

Tools required
Reference picture Operation step
(Remarks)
16. Fill the gear box by referring
to the Operation Manual of
this machine, and check the
oil level according to the
specified method.

Disassembly and assembly of torque converter-gearbox assembly

For disassembly and assembly of torque converter-gear box assembly in this machine, refer to "ZF Gear
Box Overhaul Manual".
3-38
Removal and Installation January 24, 2017
Removal and installation of drive shaft system CLG835H

Removal and installation of drive shaft system

Removal of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
1. Park the machine on a level
ground, turn off the engine,
and place the gear box han-
dle in neutral position, pull
up the emergency parking
brake lever and place the
wedges.
Caution: The drive shaft
assembly is composed
of slidable spline sleeve,
please take care to avoid per-
sonal injury caused by falling
of slide shaft fork during
removal.
2. Remove the connecting
locknut between the rear
drive shaft and rear axle
input flange with a wrench.

18# Wrench

P18T00065

3. Remove the connecting

locknut between rear drive
shaft and rear output flange
of gear box with a wrench,
and place the rear drive
shaft assembly in a safe 18# Wrench
area.

P18T00066
 3-39
January 24, 2017 Removal and Installation
CLG835H Removal and installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
4. Remove the connecting
locknut between intermedi-
ate drive shaft and front out-
put flange of gear box
assembly with a wrench.
21# Wrench

P18T00067

5. Remove tightening bolt and

nut between intermediate
drive shaft and front drive
shaft & bearing assembly,
and remove the intermediate
drive shaft from machine 18# Wrench
with a wrench.

P18T00068

6. Remove the bolts and

washer securely connecting
the front drive shaft and sup-
port assembly to middle
support plate with a wrench.
18# Wrench

P18T00069
3-40
Removal and Installation January 24, 2017
Removal and installation of drive shaft system CLG835H

Tools required
Reference picture Operation step
(Remarks)
7. Remove the bolts and nuts
securely connecting the
front drive shaft and support
assembly and front axle,
and remove front drive shaft
and support assembly from 18# Wrench
machine with a wrench.

P18T00070

8. Remove the tightening bolts

and washers of the support
plate and frame with a
blower gun or a wrench.
24# socket,
pneumatic
impact wrench
or 24# wrench

P18T00071

Installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
1. Wipe clean the surface,
install rear drive shaft and
rear axle input flange, and
align the the mounting
holes, then insert the tight- 18# wrench or
ening bolt and screw in the open-end 18#
nut and tighten it with a fixed torque
torque of spanner
132±10Nm\97.35±7.38 lbf•ft.

P18T00072
 3-41
January 24, 2017 Removal and Installation
CLG835H Removal and installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
2. Wipe clean the surface,
install the rear drive shaft
and rear output flange of the
gear box, and align the
mounting holes, screw in the
locknut and tighten it with a
torque of 132±10Nm\ 18# wrench or
97.35±7.38 lbf•ft. open-end 18#
fixed torque
Caution: When assem- spanner
P18T00073
bling, please make sure
to pay attention to the white
arrows on the identification of
drive shaft, both of which
must be aligned after assem-
bly!
3. Wipe clean the two mount-
ing surfaces of support
plates, and then pre-install it
onto the front frame. Set the
front drive shaft and support
assembly with middle sup-
port bearing on the front
frame middle support bear-
ing seat support plate.

P18T00074

4. Wipe clean the surface,

install the front drive shaft
and support assembly with
front axle input flange, and
align the mounting hole, 18# wrench or
screw in the locknut and open-end 18#
tighten it with a torque of fixed torque
132±10Nm\97.35±7.38 lbf•ft. spanner

P18T00075
3-42
Removal and Installation January 24, 2017
Removal and installation of drive shaft system CLG835H

Tools required
Reference picture Operation step
(Remarks)
5. Wipe clean the mounting
surfaces of front output
flange of gear box and inter-
mediate drive shaft flange,
and install the intermediate 21# wrench or
drive shaft to the front output open-end 21#
flange bolts of gear box, fixed torque
screw in the locknut and spanner
tighten it with a torque of
200±15Nm\ 147.5±11.06
P18T00076 lbf•ft.

6. Install the middle drive shaft,

front drive shaft and support
assembly, and align the
mounting holes. Insert the
tightening bolt and screw in
the locknut, and then tighten
them to 132±10Nm\ 18# wrench or
97.35±7.38 lbf•ft. open-end 18#
fixed torque
Caution: The intermedi- spanner
P18T00077
ate drive shaft middle
shaft fork must be aligned
with the fork which is coupled
with front axle on the front
drive shaft and support
assembly!
7. Adjust the front&rear,
left&right positions of inter-
mediate, front drive shafts
and support assembly to
make sure that the bolts Open-end 18#
between support plate and fixed torque
frame can be screwed in spanner or 18#
smoothly with torque of wrench
132±10Nm\ 97.35±7.38lbf•ft.

P18T00078
 3-43
January 24, 2017 Removal and Installation
CLG835H Removal and installation of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
8. Install the tightening bolts
and washer of the middle
support bearing seat and
support plate, and tighten 24# socket, fixed
them to 22494±18.44 lbf•ft. torque blower
gun or open-end
24# fixed torque
spanner

P18T00079

Removal and installation of front axle assembly

Removal of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine, step on
the service brake pedal for Sling
several times, so as to
release the pressures of (12 tons)
energy accumulator and
axle brake pipe.
3. Lift up the machine with a
lifting device, and support it
up with a supporting device
with 4 tires off the ground
3-44
Removal and Installation January 24, 2017
Removal and installation of front axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
4. Pre-lift up the tires with a
hoist, remove the bolts and
nuts used for tightening the
rim and axle. Sling(2 tons)30#
socket,
5. Lift the tires away from pneumatic
machine and put them in a impact wrench
safe area. or open-end 30#
6. Repeat steps (4), (5), wrench
remove another tire installed
P18T00080 on the front axle.

7. Remove the hose assembly

connected to service brake
system and the front axle.
Caution: The waste oil
shall be recovered in a
container during removal, in
order to avoid environmental
contamination. The removed
hose is shielded to avoid con-
24# Wrench
P18T00081
tamination of parts.
Danger: It is sure that the
hose pressure is fully
discharged and the oil is
cooled sufficiently before
removal of hose, in order to
avoid personal injury of hose
pressure and hot oil during
removal.
8. Pre-lift the front axle assem-
bly with a sling.
9. Remove the bolts and nuts
for connecting the front axle
assembly to the front frame
with a blower gun. Sling(2 tons)40#
socket,
10. Put the axle assembly onto pneumatic
the ground slowly with a lift- impact wrench,
ing device. 40# wrench
P18T00082
11. Remove the axle assembly
from the bottom of machine
with a handling equipment,
and then put it on the appli-
ance for axle assembly.
 3-45
January 24, 2017 Removal and Installation
CLG835H Removal and installation of front axle assembly

Installation of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Take the front axle assembly
out of placed area with a
handling device, and posi-
tion it under its mounting Sling(2 tons) 46#
point. socket,
pneumatic
2. Lift up the front axle assem-
impact wrench,
bly with a hoist, and install it
open-end 46#
on the frame.
fixed torque
3. Install the tightening bolts spanner
P18T00083 and nuts and tighten them
with torque of 2035±170Nm\
1500.8±125.38 lbf•ft.
4. Install the front axle brake
pipe and service brake
hose. Tightening torque:
37±2Nm\ 27.29±1.48 lbf•ft.
Open-fixed 24#
fixed torque
spanner

P18T00084

5. Lift up the tire with a hoist

and install it onto the axle,
Sling
and then install the rim nut
and tighten it to 600±60Nm\ (2 tons)30#
442.5±44.25 lbf•ft. socket,
pneumatic
impact wrench,
open-end 30#
fixed torque
spanner
P18T00085

6. Lift the machine with a hoist,

remove the support device, Sling
and put the machine onto (12 tons)
the ground.
3-46
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Removal and installation of rear axle assembly

Removal of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine, step on
the service brake pedal for Sling
several times, so as to
release the pressures of (12 tons)
energy accumulator and
axle brake pipe.
3. Lift up the machine with a
lifting device, and support it
up with a supporting device
with 4 tires off the ground
4. Pre-lift up the tires with a
hoist, remove the bolts and
nuts used for tightening the Sling
rim and axle.
(2 tons)30#
5. Lift the tires away from socket,
machine and put them in a pneumatic
safe area. impact wrench
or open-end 30#
6. Repeat steps (4), (5),
wrench
remove another tire installed
P18T00086 on the rear axle.

7. Remove the the rear axle

and hose assembly
connected to service brake
system.

24# Wrench

P18T00087
 3-47
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
8. Remove the steel pipe
connected to the rear axle
and centralized lubricating
system.

Open-end 16#
wrench

P18T00088

9. Pre-lift the rear axle

assembly with a sling.
10. Remove the bolts and
locknuts for connecting the
rear axle assembly to the
rear frame. Sling (2 tons)
36# socket,
11. Put the axle assembly onto pneumatic
the ground slowly with a impact wrench,
lifting device. 36# wrench,
P18T00089
12. Remove the axle assembly
from the bottom of machine
with a handling equipment,
and then put it on the
appliance for axle assembly.
13. Place the axle assembly as
shown in the left figure to
make front swing frame
support shaft upward, and
rear swing frame support
shaft downward.

P18T00090
3-48
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
14. Remove the seal ring and
snap ring from the front
swing support rack with a
screwdriver.
Straight
screwdriver

P18T00091
15. Remove the front swing
support rack from axle
assembly with a lifting
device and place it in a safe
area. Sling
(2 tons)

P18T00092
16. Place the axle assembly as
shown in the left figure to
make the rear swing support
rack upward.

P18T00093

17. Remove the bolts, washers

with a wrench or an
pneumatic tool.

Open-end 18#
wrench

P18T00094
 3-49
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
18. Remove the cover.

Open-end 18#
wrench

P18T00095
19. Remove the thrust washer.

Straight
screwdriver

P18T00096

20. Remove the bolts and

washer tightening the
clamping plate.
Open-end 27#
wrench or 27#
socket,
pneumatic
impact wrench

P18T00097

21. Remove the clamping plate.

Straight
screwdriver

P18T00098
3-50
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
22. Remove the thrust washer.

Straight
screwdriver

P18T00099
23. Remove the rear swing
support rack with a lifting
device.

Sling
(2 tons)

P18T00100

24. Screw the M8 bolt in the

dowel and remove the
dowel.

Open-end 13#
wrench

P18T00101

25. Remove the bolts and wash-

ers tightening the support
shaft.
Open-end 21#
wrench or 21#
socket,
pneumatic
impact wrench

P18T00102
 3-51
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
26. Remove the support shaft
with a lifting device.

Sling
(2 tons)

P18T00103

Installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Lift up the axle assembly
and position it as shown in
the left figure onto a special
assembly device.

P18T00104

2. Wipe clean the mounting

face between the support
shaft and the axle case
connected to it with a clean
cloth, install the support
shaft onto the axle and align Copper bar
two dowel pins accurately,
strike it into the dowel pin
with a copper bar.

P18T00105
3-52
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
3. Apply thread lock sealant to
thread portions of bolts,
screw them into support
24# socket,
thread holes by 2-3 threads
pneumatic
by hand, and tighten them
impact wrench,
with an air gun. Tightening
open-end 24#
torque: 305±25Nm\
fixed torque
22494±18.44 lbf•ft.
spanner

P18T00106

4. Horizontally place rear

swing frame with the thread
hole end upward, and install
the bush into rear swing
support rack.

P18T00107

5. Turn over swing frame by

180°, install seal ring and
knock it to the end with
nylon hammer.

Nylon hammer

P18T00108

6. Turn over swing frame group

by 180°, evenly apply
molybdenum disulfide
lithium base grease to
bushing cone, and install
rear swing frame group into
spindle with lifting device.

P18T00109
 3-53
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
7. Install thrust washer and
pressing plate and align the
holes well.

P18T00110

8. Apply thread lock sealant to

thread portion of bolt, screw
bolts and hard washers into
the clamping plate thread 24# socket,
holes by 2-3 teeth by hand, pneumatic
and drive them in impact wrench,
symmetrically with open-end 24#
pneumatic impact wrench fixed torque
with the tightening torque of spanner
305±25Nm\ 224.94±18.44
P18T00111 lbf•ft.

9. Put a thrust washer and

cover and align the holes
well.

P18T00112

10. Apply thread lock sealant to

thread of bolts, screw bolts
and hard washers into cover
thread holes by 2-3 teeth by 21# socket,
hand, and drive them in pneumatic
symmetrically with impact wrench,
pneumatic impact wrench open-end 21#
with the tightening torque of fixed torque
195±15Nm\ 143.81±11.06 spanner
lbf•ft.
P18T00113
3-54
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
11. Horizontally place front
swing frame, and knock seal
ring into front swing frame
mounting hole to the end
with nylon hammer.
Nylon hammer
Caution: The seal ring lip
faces outward.
Seal
Sealring
ringliplip

P18T00114

12. Press the bushing into the

front swing frame to the bot-
tom
Caution: The small hole
of bushing must toward
the lug end of front swing
support.

P18T00115

13. Install the snap ring into the

groove with straight screw-
driver.

Straight
screwdriver

P18T00116

14. Knock seal ring into front

swing frame mounting slot to
the end with nylon hammer;
Caution:The seal ring lip
faces outward.

Seal
Sealring
ringliplip

P18T00117
 3-55
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
15. Evenly apply the molybde-
num disulfide lithium base
grease to bushing cone, and
then lift and install the front
swing support subassembly
onto the bearing seat of the
main transmission.
Sling
16. Place the axle assembly on
a transport device with a lift- (2 tons)
P18T00118
ing device, and right under
mounting point of rear axle.
17. Install the axle assembly
onto the rear frame with a
lifting device and align the
mounting holes.
18. Install the mounting bolts,
washers and nuts of the axle
assembly and tighten them
with an blower gun to 36# socket,
1122±90Nm\ 827.28±66.38 pneumatic
lbf•ft. impact wrench,
open-end 36#
fixed torque
spanner

P18T00119

19. Install the axle and hose

connecting the service brake
pipe and tighten it to
37±2Nm\ 27.29±1.48 lbf•ft.

Open-end 24#
wrench

P18T00120
3-56
Removal and Installation January 24, 2017
Disassembly and assembly of the drive axle CLG835H

Tools required
Reference picture Operation step
(Remarks)
20. Lift up the tire with a hoist
and install it onto the axle,
and then install the rim nut
and tighten it to 600±60Nm\ 30# socket,
442.5±44.25 lbf•ft. pneumatic
impact wrench
or open-end 30#
fixed torque
spanner

P18T00121

21. Install the steel pipe con-

necting the centralized lubri-
cating system and axle.

Open-end 16#
wrench

P18T00122

22. Lift the machine with a hoist,

remove the support device, Sling
and put the machine onto (12 tons)
the ground.

Disassembly and assembly of the drive axle

For disassembly and assembly of the drive axle in this machine, see "835H Drive Axle Service Manual"
for details.
 3-57
January 24, 2017 Fault Diagnosis and Troubleshooting Methods
CLG835H Disassembly and assembly of the drive axle

Fault Diagnosis and Troubleshooting Methods

Fault inspection and

Fault features Main reasons
troubleshooting
1. Start circuit of the base machine (such as 1. Check the circuit of the base machine.
power voltage, electric lock, startup relay
and startup motor) has faults.
2. The lever is not at the neutral position. 2. Shift the lever to neutral position.
The engine can not 3. The fuse to the control circuit on the base 3. Replace the fuse.
1
Activation machine is burnt.
4. Poor contact of handle plug or the handle 4. Organize the plugs.
is failed.
5. Poor contact of controller plug or the con- 5. Organize the plugs.
troller is failed.
1. Oil pressure gauge is failed. 1. Replace the oil pressure gauge
2. Insufficient tightening torque for bolt of 2. Tightening torque for M8-8.8 bolt of shift
Low shift pressure shift control valve. control valve is 26Nm.
2 at all gears 3. Spring of main pressure valve is broken. 3. Replace it.
Low pressure 4. Gear shift pump is worn 4. Replace the gear shift pump.
5. Fragments enter into shift control valve or 5. Replace the filter, and clean the control
valve is stuck valve.
1. O-ring in throttle plug is damaged 1. Replace the O-ring
Too short shifting
3 2. The tightening torque of pressure control 2. Tightening torque for M8-8.8 bolt of shift
time at all gears
valve bolts is out of specified range control valve is 26Nm.
Too long shifting 1. Throttle plug is blocked. 1. Clean and dredge.
4
time at all gears 2. Pressure control valve is stuck. 2. Wash and check.
1. Oil temp sensor is failed. 1. Replace the part.
2. Oil temperature gauge is failed. 2. Replace the part.
The oil tempera- 3. Insufficient oil level. 3. Check oil level following the correct
5 ture of the torque method.
converter is high 4. Air found in torque converter oil radiator. 4. Exhaust.
5. Oil line from torque converter to radiator is 5. Check oil pipe from radiator to gear box
poor. and radiator for blockage.
1. Poor cooling capability of radiator. 1. Check whether cooling capability is suffi-
cient, such as checking the degree of
tightness for engine fan belt and dirt
The oil tempera- attached to outer surface of radiator.
6 ture of the torque 2. Back pressure valve of torque converter 2. Be careful to check hose connector from
converter is high stuck. gear box to radiator. If hose connector
enters housing too deeply, pushes spool
of pressure valve and cause valve to stick,
oil line will be getting blocked.
3-58
Fault Diagnosis and Troubleshooting Methods January 24, 2017
Disassembly and assembly of the drive axle CLG835H

Fault inspection and

Fault features Main reasons
troubleshooting
1. Insufficient oil level. 1. Check oil level and add the oil by following
the right operation.
2. Elastic plate connecting engine and 2. Replace the elastic plate or replace the
torque converter is torn, or power connec- related damaged parts.
tion from torque converter to gear box
input gear has faults.
3. Circuit failure of the complete machine. 3. Check the power voltage for abnormal
Vehicle does not and the cable for damage.
7
move at any gear
4. Shift pressure is too low. 4. Refer to the troubleshooting above.
5. Solenoid valve is damaged. 5. Check if the rated current of solenoid
valve is 830 mA.
6. Shift lever is damaged. 6. Refer to the troubleshooting for lever.
Replace it.
7. Controller is damaged. 7. Refer to the fault inspection of controller.
Replace it
 3-1
January 24, 2017 Power Train System
CLG835H

Power Train System

Basic Information ............................................................................................................3-3
Safety .....................................................................................................................................................3-3
System composition and position ..........................................................................................................3-4
System technical parameters.................................................................................................................3-5
System schematic diagram and working principle description...............................................................3-6
Overview of transmission fluid ...............................................................................................................3-7
Maintenance and replacement of gearbox and drive axle oil.................................................................3-8
Universal tool, tooling list .....................................................................................................................3-10
Special tool, tooling list ........................................................................................................................3-10

Structure Function Principle ........................................................................................3-11

Torque Converter - Gearbox System ...................................................................................................3-11
Drive axle system.................................................................................................................................3-17
Drive Shaft System ..............................................................................................................................3-19
Tire&rim system ...................................................................................................................................3-21

Testing and adjustment ................................................................................................3-25

Torque Converter - Gearbox System ...................................................................................................3-25
Drive axle system.................................................................................................................................3-25

Removal and Installation ..............................................................................................3-26

Removal and installation of torque converter-gearbox system ............................................................3-26
Disassembly and assembly of torque converter-gearbox assembly ....................................................3-38
Removal and installation of drive shaft system ....................................................................................3-39
Removal and installation of front axle assembly ..................................................................................3-44
Removal and installation of rear axle assembly...................................................................................3-47
Disassembly and assembly of the drive axle .......................................................................................3-60

Fault Diagnosis and Troubleshooting Methods .........................................................3-61

Testing and adjustment ................................................................................................3-63
Power Train Test..................................................................................................................................3-63
3-2
Power Train System January 24, 2017
CLG835H
 3-3
January 24, 2017 Basic Information
CLG835H Safety

Basic Information

Safety This word means existing potential danger,

and if no avoidance, it may cause slight or
Many accidents in operation, maintenance, medium personal injury.
repair and other aspects are caused by fail to "Caution" is also used for reminding the
observe the basic safety rules and precautions. If safety attentions of unsafe operation possi-
the case of potential risk is fully aware in bly causing personal injury. "Danger" repre-
advance, these accidents usually can be sents the worst dangerous conditions. Safety
avoided. The operators must pay attention to sign of "danger" or "warning" is an attach-
these potential risks, and be trained for relevant ment set at the specific dangerous location.
skills before properly and safely operating, General precautions are listed on the safety
maintaining and repairing the machine. sign of "Caution".
● Any improper operation, maintenance and In addition, please carefully follow the "Cautions"
repair methods may lead to hazardous condi- listed in this Manual, otherwise, it may result in
tion, cause personal injury and even death. great damage to the machine. We are unable to
● Be sure to read and understand the relevant enumerate all the possible risks (including
security measures and precautions before potential dangers), and the warnings in the
operating, maintaining and repairing the Manual and product do not cover all the risks and
machine. dangers. If the tools, operation procedures,
methods or techniques are not specially
● Please strictly obey the safety warning infor- recommended by our company, it is necessary to
mation listed in this Manual and on the ensure the personal safety of every one, and
machine during operating, maintaining and protect the machine against any damage.
repairing the machine, otherwise heavy casu-
alties will occur. The contents herein are provided based on the
status of the machine at the time when the
Safety warning information in the Manual is Manual was written, whereas, all products are
indicated by the following symbols updating, and this machine is no exception. Any
modification will influence the operation,
maintenance and repair of the machine,
therefore, please contact the LiuGong dealers for
This word means existing potential danger, latest and most comprehensive service
and if no avoidance, it may cause death or information before operating, maintaining and
serious personal injury. repairing the machine.

This word means danger will occurred imme-

diately, and if no avoidance, it may cause
death or serious personal injury.
3-4
Basic Information January 24, 2017
System composition and position CLG835H

System composition and position

The power train system is a critical part of a loader, like a heart, and it is located at portion between the
engine and tire, as shown in red in the figure below. It mainly consists of three majority components:
gearbox, drive shaft and drive axle.
Fig 3-1 Schematic diagram of position for wheel loader

P18T00001

System technical parameters

Main technical parameters for the power train system of this machine are listed in Table 3-1.
Table 3-1: Main technical parameter table for power train system

System components Items Parameters Remarks

Model ZF 4WG158
Type Fixed shaft type
Gear box
Full-auto electro hydraulic
Control mode
control
Torque converter Type Single-turbo, three-element
Spiral gear level-I reduction,
Drive mode
Drive axle wheel planetary gear reduction
Brake mode Wet brake
 3-5
January 24, 2017 Basic Information
CLG835H System schematic diagram and working principle description

Table 3-1: Main technical parameter table for power train system

System components Items Parameters Remarks

Tubeless bias tire or tubed bias
Tire structure Radial tire
tire is optional
Tire Specification 17.5R25 two star L3
Level \
Type of tread L-3 Ordinary block
Rim Specification 25-14.00/1.5

System schematic diagram and working principle description

The torque converter -gearbox assembly equipped in this machine is ZF 4WG158 full auto type, and the
drive axle is 30 wet axle, whose structure diagram are shown as below:
Figure 3-2 Diagram for gear box assembly composition

1 2 3 4 3

14

13 6

12
7
11
8
10

9 P18T00002

1. Coupling device 8. Output plate

2. Torque converter housing 9. Nameplate
3. Lifting eye 10.Output flange
4. Control harness interface 11.Speed sensor
5. Electro-hydraulic shift control valve 12.Oil outlet of torque converter
6. Suction tube 13.Torque converter outlet oil temperature sensor
7. Brake 14.Cover
3-6
Basic Information January 24, 2017
System schematic diagram and working principle description CLG835H

Fig 3-3 Structure diagram for drive axle assembly

Axle housing bevel gear of the wheel reduction half shaft

P18T00003

As shown in the above figure, the engine is coupled with the torque converter of the torque converter-
gear box assembly, a part of engine power is used to drive the torque converter to work and another part
is used to drive the hydraulic pump so as to provide power for the hydraulic system.
When the engine works together with torque converter, the engine output power is input into the gear
box via the torque converter. Under the control of its electro-hydraulic shift control valve, the gear box
can output power and speed at different positions with gear shafts and clutches.
The power output from the gear box is transmitted to the main drive of drive axle via a drive shaft, and
then transmitted to wheel reducer by left and right axle shafts via main drive differential, and further to
tire rim assembly by decelerating and increasing torsion, thus finally to drive the loader to travel and
work.
 3-7
January 24, 2017 Basic Information
CLG835H System schematic diagram and working principle description

Overview of transmission fluid

The oil product used for wheel loader is divided into four categories, i.e. the lubricant, grease, brake fluid
and fuel, each of which can play a different role in the use of loader.
The lubricant, used in the loader, has two effects , one is to lubricate the parts and reduce the pressure,
so as to prolong the service life of parts; the other is to dissipate the heat of parts produced by friction, so
as to make the parts work normally. The lubricant is composed of various petroleum-based additives.
The wheel loader use a kind of lubricant which has four classes , i.e, diesel oil, gear oil, hydraulic drive
shaft and hydraulic fluid. The applications of the lubricant used in the power train system of this machine
are shown in the table below:
Table 3-2 Table of lubricant application

Cate- Ambient temperature Recommended

Application parts
gory -40 -30 -20 -10 0 10 20 30 40 50 brand

Mobil Delvac Super 1300 ZF torque converter &

engine oil transmission assembly
Torque
(-15°C~+50°C)\ uses SAE 15-40 in gen-
converter
(-5°F~122°F) eral areas and in hot
- gearbox
Mobil ATF 220 desert areas; and uses
assembly
(-35°C~+50°C)\ Mobil ATF220 in arctic
(-31°F~122°F) areas.
Mobil gear oil 80W-90/LS
with additives
LiuGong axle uses SAE
(-15°C~+50°C)\
80W-90/LS in general
(-5°F~122°F);
and hot areas, and Mobil
Mobil gear oil 424
424 with additives and
(-40°C~+50°C) \
Gear oil Shell SPIAX S6 AXME
(-40°F~122°F)with addi-
75W-90/LS in arctic
tives
areas.
Shell SPIAX S6 AXME
LS means the additives
75W-90/LS
are inclusive
(-40°C~+50°C)\
(-5°F~122°F)
3-8
Basic Information January 24, 2017
Maintenance and replacement of gearbox and drive axle oil CLG835H

Maintenance and replacement of 2) After the Oil sump tank of the gear box com-
pletely gets empty, wipe clean the mating
gearbox and drive axle oil surface on drain plug and gearbox housing
that contacting with O ring of the oil drain
The oil product added to the torque converter - plug. After the O-ring of the oil drain plug is
gearbox assembly must be consistent with oil list replaced, reassemble and tighten it.
TE-ML 03 recommended by ZF, the oil level shall 3) Add the oil in accordance with the oil list TE-
be checked once a week by the following ML 03 as recommended by ZF;
methods:
4) Check the oil level by the method as speci-
1) Park the machine on level ground; fied for transmission.
2) Place the gear box gear in the neutral posi- The fine oil filter is also replaced every time the
tion; oil change is done for the gear box. The oil filter
3) Torque converter - gearbox oil is at 80- may be installed by the following method:
95°C\176°F~203°F; 1) Apply a small amount of the gear box oil on
4) The engine is idling 800rpm); the oil seal of oil filter;
5) Observe the oil level gauge of gearbox and 2) The oil filter is screwed in until the oil seal of
it shall be in the "HOT" zone; oil filter contacts the filter head, tighten it 1/3
to 1/2 turn by hand.
After the torque converter and gearbox assembly
co-work for the first 100h, the oil shall be The oil product added in the drive axle must be
replaced every 1000h or at least once a year. Oil in accordance with the oil list of 85W-90 heavy-
can be replaced by the methods as below: load wheel gear oil (GL-5) recommended by
LiuGong. The oil level of LiuGong axle may be
1) Unscrew the drain plug on the torque con-
checked by the following methods:
verter - gearbox assembly to drain the oil.
Figure 3-5 Wheel drain plug and oil level check
plug

The waste oil shall be collected in a container

during oil drainage, in order to avoid environ-
mental contamination;
The oil shall be fully cooled before oil drain-
age, in order to avoid personal injury due to
hot oil splashing onto the body.
Figure 3-4 Gearbox drain plug

P18T00005

P18T00004
P18T00004
 3-9
January 24, 2017 Basic Information
CLG835H Universal tool, tooling list

1) Wheel reducer: place the axle according to the installation position, and turn the hub to keep the oil
level in a horizontal position, fill oil from left and right hubs respectively until the oil overflows the oil
level plug; park the reducer for ten minutes after the drive axle running, and then check the oil level,
and add enough lubricating oil.
Figure 3-6 Bevel gear refuel plug and oil level check plug
Bevel gear refuel plug and oil level check plug

P18T00006

2) Axle housing: the oil is added into axle housing until it overflows from the oil filler.
The axle oil shall be replaced at the first 500h, after that once every 1000h, or at least once a year.

Universal tool, tooling list

For the universal tools, tooling list, please see the torque converter-gear box system, drive axle system
and drive shaft system.

Special tool, tooling list

For the special tool, tooling list, please see "ZF Box Overhaul Manual" for details.
3-10
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

Structure Function Principle Figure 3-8 Structural schematic diagram of

torque converter - gear box assembly
Clutch
Torque Converter - Gearbox Forward KV Clutch K1

System Converter

Input Pump
The torque converter -gearbox system equipped 1. Power Take -OFF
in this machine is ZF 4WG158 full auto type,
which mainly consists of a three-element, single- Clutch K2

turbo torque converter, mechanical gear box with

four forward gears, three reverse gears and Clutch K3
Clutch Reverse KR
electro hydraulic shift control system, as shown
Clutch K4
below: Parking Brake

Figure 3-7 External view of torque converter - LAYSHAFT

gear box assembly Output Output
KV - Gerar Rear Axle Front Axle

Idler Gear
Speedometer Drive
Oil Sump
K4 - Gerar P18T00008

P18T00007
 3-11
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

System technical parameters

The technical parameters of ZF 4WG158 torque converter - gear box assembly in this machine are listed
in Table 3-3.
Table 3-3 Technical parameter table of torque converter - gear box assembly

Remar
Component Items Parameters
ks
Model ZF 4WG158
Type Fixed shaft type
Gears Four forward gears, three reverse gears
Gearbox
Torque converter-gear box assembly
430\ 948.15
Quality (oil not included) /kg\lb
Type of emergence parking brake Shoe brake
Type Single-turbo, three-element
Circulation circle diameter of torque con-
340\ 13.39
verter/mm\In
Torque converter
Inlet pressure of torque converter/MPa\ psi 0.85\ 123.25
Outlet pressure of torque converter/MPa\
0.50\ 72.5
psi
System voltage/V 24
Shift control
Shift control mode Auto electro hydraulic power shift
system
System working pressure/MPa\ psi 1.6+0.2\ 232+29

System schematic diagram and working principle description

The torque converter of this system is a three-element with single-turbo structure, and the diagram for its
structure and working principle is as follows:
Figure 3-9 Structure diagram for torque converter

Turbine wheel
Pump wheel

From the engin

P18T00009
3-12
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

Figure 3-10Schematic diagram for torque converter hydraulic

Hydraulic torque converter

Outlet constant
pressure valve of
torque converter

Inlet constant refined

pressure valve filtration
of torque converter
Radiator
Front pump

Transmission Engine Rough

—shaft lubrication filtration
Tank P18T00010

We can see from structure diagram for torque converter, a three-element, single-turbo torque converter
mainly consists of pump wheel, guide wheel and a turbine. As the pump wheel of torque converter is
directly coupled with and driven by the engine, the hydrodynamic drive oil between pump wheel and tur-
bine forms complex flow under rotation of pump wheel. The mechanical energy is converted into kinetic
energy of oil fluid. The fluid flow with kinetic energy strikes against the turbine at a high speed. The tur-
bine absorbs its kinetic energy and restores it to mechanical energy for gearbox. The guide wheel is sta-
tionary. When the fluid flow(which is from the turbine and has some kinetic energy) passes through the
curved blade of the guide wheel, the torque formed by the impact force and counterforce produced on
the blade acts on the engine base, and equivalent to the sum of increased torque of turbine from coun-
terforce and reduced torque of pump wheel from impact force. It is possible that the output torque of tur-
bine is greater than input torque of pump wheel, based on which, the torque converter is variable.
The working oil of torque converter is imported into the torque converter through the coarse and fine fil-
ters from the oil tank by the variable pump. There is a constant pressure valve (safety valve) set at the
inlet of torque converter, whose main role is to avoid excessive pressure in the torque converter to dam-
age the parts. There is another constant pressure valve (back pressure valve) at the outlet of torque con-
verter, whose main role is to ensure the torque converter is full of working oil in order to avoid cavitation
appeared during operation and impact on the performance of torque converter.
 3-13
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

An electro-hydraulic shift control valve is installed on the gear box assembly, see figure 3 -11 and 3-12
for structure composition and operating hydraulic pressure schematic diagram.
Figure 3-11 Diagram for structure and composition of electro-hydraulic shift control valve

CABLE HARNESS X HOSE LINE FROM

M4 TO REVERSING VALVE

CONTROL PRESSURE
SHIFT VALVE 4
VALVE

REVERSING VALVE
HOSE LINE FROM
M4 TO REVERSING VALVE
REDUCING VALVE

2-STAGE
PRESSURE
CONTROL VALVE PRESSURE CONTROL VALVE

SHIFT VALVE 2
BLEEDER VALVE

RESET VALVE

SHIFT VALVE 1 SHIFT VALVE 5 SHIFT VALVE 3

P18T00011
Figure 3-12 Schematic diagram for hydraulic pressure of torque converter - gear box assembly
OIL CIRCULATION DIAGRAM 4 WG-200 WITH 2-STAGE PRESSURE CONTROL VALVE -VARIANT II -

TABLE -20 NEUTRAL

THE MARKED POSITIONS (e.g.53) CORRESPOND WITH
THE POSITIONS ON THE TABLE -15

DIAGRAM CODE “G”

4 SPEED -VERSION

LEGEND
CONTROL PRESSURE
CONTROL PRESSURE REDUCED
CONTROL PRESSURE MODULATED
CONVERTER INLET PRESSURE
CONVERTER EXIT PRESSURE
LUBRICATION
RETUAN FLOW INTO THE SUMP

P18T00012
3-14
Structure Function Principle January 24, 2017
Torque Converter - Gearbox System CLG835H

The electro-hydraulic shift control valve consists Figure 3-15 Drive line of forward gear 3
of solenoid valves M1, M2, M3, M4, M5, valve
stem and body. When the electro-hydraulic shift ࠰
OUT

control valve is operating, the fluid flow in the Torque

valve stem oil passage is controlled by the power converter
turbine
of solenoid valves, which finally control the
engagement and disengagement of clutch in the
gear box, thus to make the gear box achieve
Input shaft
different shifts. For the power transferring line
and gear engagement with the gear box in
different gears, please see the figure of the
power transferring line for each gear as the
following figure 3-13 to 3-19.
Figure 3-13 Drive line of forward gear 1
OUT
࠰
OUT
Output Output
shaft shaft
Torque
converter P18T00015
turbine
Figure 3-16 Drive line of forward gear 4
Input shaft
࠰
OUT

Torque
converter
turbine

Input shaft

OUT
Output Output
shaft shaft
P18T00013

Figure 3-14 Drive line of forward gear 2

OUT

Output Output
࠰
OUT
shaft shaft
Torque
converter P18T00016
turbine

Input shaft

࠰
OUT
Output Output
shaft shaft

P18T00014
 3-15
January 24, 2017 Structure Function Principle
CLG835H Torque Converter - Gearbox System

Figure 3-17 Drive line of reverse gear 1 Figure 3-19Drive line of reverse gear 3

OUT
OUT
Torque Torque
converter converter
turbine turbine

Input shaft
Input shaft

OUT
OUT
Output Output Output Output
shaft shaft shaft shaft

P18T00017 P18T00019

Figure 3-18 Drive line of reverse gear 2

OUT
Torque
converter
turbine

Input shaft

OUT
Output Output
shaft shaft
P18T00018
3-16
Structure Function Principle January 24, 2017
Drive axle system CLG835H

Drive axle system

Composition and position of drive axle system

The basic function of drive axle for wheel loader is to reduce the gear box input speed with main drive
and wheel reducer and increase the torsion, thus to meet the requirements of driving, operating speed
and traction of the base machine. And also, change the straight line motion to vertical-lateral motion via
main drive, so that the drive wheel can be driven to rotate to make the base machine drive along the
straight route. The differential helps balance the speeds of left and right tires to make sure the machine
can still drive when the driving resistances on both sides are different.
In addition to basic features of drive axle for wheel loader, it is also a load-bearing unit for complete
machine, a support device for road wheel and mounting & support device for service brake. The drive
axle system mainly consists of front axle, rear axle and brake lines. The swing axle also includes front,
rear swing brackets, support shaft and other parts.

System technical parameters

Major technical parameters for the drive axle system of this machine are listed in Table 3-4.

Table 3-4 Main technical parameter table for drive axle

System components Items Parameters Remarks

Spiral gear level-I reduction, wheel
Drive mode
planetary gear reduction
Front axle
Brake mode Built-in wet multi-plate type
Brake pressure /MPa\psi 1450
Spiral gear level-I reduction, wheel
Drive mode
planetary gear reduction
Rear axle
Brake mode Built-in wet multi-plate type
Brake pressure /MPa\psi 1450
 3-17
January 24, 2017 Structure Function Principle
CLG835H Drive axle system

System schematic diagram and working

principle description Figure 3-21 Diagram of the wheel reducer

The drive axle for wheel loader is classified into

two classes, i.e. front axle and rear axle, the
main difference between which is the spiral
directions of the spiral bevel gear pairs in the
main drive. The driving spiral bevel gear of front 1 2
axle is left-handed, and that of rear axle is right-
handed. The structure diagram for bevel gear
3
and wheel reducer of this machine is as shown in
figure 3-20 and 3-21.
4
Figure 3-20 Structure diagram of the bevel gear

5 4 5
2

3
P18T00021
1. Axle shaft 4. Hub
2. Planetary gear 5. Sun gear
3. Brake
1 The bevel gear structure is shown in Figure 3-21.
The bevel gear includes two parts, one is the
bevel gear composed of driving spiral bevel gear
and large size spiral bevel gear; the other is the
differential composed of cross axle and bevel
gear. The power is transmitted to the driving
spiral bevel gear by the gear box through drive
P18T00020
shaft, thus to drive the large size spiral bevel
1. Driving spiral bevel gear 4. Carrier gear with differential to rotate together. The half
2. Axle housing 5. Differential shaft gear of differential passes the power to left/
3. Driven spiral bevel gear
right half shaft which is connected with the
splines, and further to the wheel reducer. The
power is then transmitted to hub and finally to
drive the tire to rotate after further speed
reduction, increasing torsion through wheel
reducer.
3-18
Structure Function Principle January 24, 2017
Drive Shaft System CLG835H

Drive Shaft System

In the wheel loader, the drive shaft system is mainly used to deliver the power between the two con-
nected shafts, of which the relative position changes constantly during operation. Because of the special
transmission characteristics of universal joint, the drive shaft may connect two transmission parts with
nominal concentric axial line. However, an error may occur during installation and axial line deviates
from the original position when operating, the drive shaft is widely used in shoveling transportation
machine.

System composition and position

The drive shaft system of wheel loader is composed by the following two structural types in accordance
with its formal layout, the drive shaft system shown in Figure 3-25 consists of rear and front drive shafts,
the one shown in Figure 3-26 consists of rear, front, intermediate shafts and support assembly.
Figure 3-22 Drive shaft system

1
3

P18T00022
1. Front drive shaft 2. Torque converter-gear box assembly 3. Rear drive shaft

Figure 3-23 Drive shaft system

1 2 4

P18T00023

1. Front drive shaft&support assembly 3. Torque converter-gear box assembly

2. Intermediate drive shaft 4. Rear drive shaft
 3-19
January 24, 2017 Structure Function Principle
CLG835H Tire&rim system

System technical parameters

The technical parameters for the drive shaft system are listed in Table 3-5.

Table 3-5 Technical parameter table for drive shaft system

Parts name Input-end coupling type Output-end coupling type

Rear drive shaft 7C FLANGE 7C FLANGE
Intermediate drive shaft 180 round flange 150 round flange
Front drive shaft&support assembly 150 round flange 150 round flange

Tire&rim system

System composition and position

Tire & rim system are both components bearing weight of a complete machine and direct components
driving the complete machine to walk. Tires can be classified into bias tires with an inner tube, bias tires
without an inner tube, radical tires, solid tires, etc. in accordance with it structural layouts. They can also
be classified into block pattern tires, traction pattern tires, skidding tires, etc. according to pattern form.

System technical parameters

The technical parameters for the tire & rim system equipped in this machine are listed in Table 3-6.

Table 3-6 Technical parameters of tire&rim system

System compo-
Items Parameters Remarks
nents
Tubeless bias tire or tubed bias
Tire structure Radial tire
tire is optional
Specification 17.5R25 two star L3
Level \
Tire Type of tread L-3 Ordinary block
Front wheel:0.55-0.58\79.75-
84.10
Tire pressure (MPa)\(psi)
Rear wheel: 0.52-0.55\75.40-
79.75
Rim Specification 25-14.00/1.5
3-20
Structure Function Principle January 24, 2017
Tire&rim system CLG835H

Common failure modes of tire and reasons

Common failure mode of tire and reasons are as follows:

Typical pictures Failure mode Main reasons

1. Reasons for manufacture:
there is impurities, oil stains
or water in the tread rubber
or cord ply or not firmly com-
pressed when being
molded, or gasoline does
Delaminating of not fully volatilize.
crown 2. Reasons for usage: speed is
too fast (beyond specified
speed), and directive pattern
is traveling in reverse direc-
tion.
P18T00024

1. Reasons for manufacture:

there is impurities, oil stains
or water in sidewall rubber
or cord ply or not firmly com-
pressed, or gasoline does
not fully volatilize.
2. Traveling with insufficient air
Shoulder will intensify wear of tire
delamination shoulders and cause exces-
blasting sive heat, which will sepa-
rate sidewall rubber from
cord ply and cause an explo-
sion when problem gets
worse.

P18T00025
 3-21
January 24, 2017 Structure Function Principle
CLG835H Tire&rim system

Typical pictures Failure mode Main reasons

1. Reasons for manufacture:
there is impurities, oil stains
or water in sidewall rubber
or cord ply or not firmly com-
pressed when being molded
or gasoline does not fully
volatilize.
2. Traveling on uneven road
Delaminating of
with insufficient air or over-
sidewall
load or operating in severe
working conditions will
cause tire body to deform
badly and cause excessive
heat in partial sidewall so
that sidewall peels off or
explodes.
P18T00026

Major reasons: mixing of

extruded tread compound is
uneven, surfaces of semi-
Double skin finished product have impurities,
vulcanization mold has oil
stains, and isolating agent is
unevenly applied.

P18T00027
3-22
Structure Function Principle January 24, 2017
Tire&rim system CLG835H

Typical pictures Failure mode Main reasons

Major reasons: traveling with

too high pressure will cause
Wearing of
earthed area reduction of tire
crown
crown, local load increase and
wear intensification.

P18T00028

Major reasons: during traveling,

outer tube is scratched by
Trauma
pointed objects or is stabbed
evenly by pointed objects.

P18T00029

Major causes: the vehicle

speeds up when steering, the
tire side rubs the roadside
Side trauma obstacles; and installed tire is
stuck with hard objects; the
machinery is damaged during
transportation, installation.

P18T00030
 3-23
January 24, 2017 Testing and adjustment
CLG835H Torque Converter - Gearbox System

Testing and adjustment 2) Start up the machine and step on the service
brake pedal until the oil overflows from the
exhaust plug.
Torque Converter - Gearbox 3) Tighten the exhaust plug.
System

1. Leakage check
Start up the machine and operate it for several
minutes, observe whether there is sign of
leakage from the hose assembly coupled with
gear box assembly, if so, re-tighten it.
2. Test of gear box shift pressure
Power on the machine, now the oil pressure
warning light of gear box flashes on the
instrument panel, and after startup of machine,
the warning light shall go out, if not, inspect the
oil level of gear box once again.

Drive axle system

1. Leakage check
Start up the machine, step on the service brake
pedal for several times after the air pressure of
energy accumulator gets normal, observe
whether there is sign of leakage at the joint of
steel pipe of front axle brake and service brake
hose.
2. Exhaust
Figure 3-24 Rear axle ventilation plug

P18T00031

1) Loosen the exhaust plugs at both ends of

axle.
3-24
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Removal and Installation

Removal and installation of torque converter-gearbox system

Removal of torque converter - gearbox system

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine and
remove the key.
3. Remove the drain plug of
gear box assembly to drain
the oil.
Caution: The waste oil
shall be recovered in a
container during removal, in
order to avoid environmental
contamination. The removed 34# socket, 13#
hose is shielded to avoid con- socket,
tamination of parts. pneumatic
impact wrench
Danger: It is sure that the
P18T00032 hose pressure is fully
discharged and the oil is
cooled sufficiently before
removal of hose, in order to
avoid personal injury of hose
pressure and hot oil during
removal.
4. Remove the cab assembly
of machine, see section
“Removal and Installation of
Cab” for removal steps.
 3-25
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
5. Remove the hose assembly
connecting the oil filter pipe
to the gear box assembly
with wrench.
Caution: The waste oil
shall be recovered in a 41# wrench
container during removal, in
order to avoid environmental
contamination.
P18T00033
The removed hose is shielded
to avoid contamination of
parts.
6. Remove the test line con-
nected to gear box assem-
bly and test hose.

18# Wrench

P18T00034

7. Remove the hose assembly

with a wrench.

41# Wrench

P18T00035
3-26
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
8. Remove the clamping bolt
fixing the oil filler steel-pipe
with a wrench.

10# Wrench

P18T00036

9. Remove the coupling lock-

nut between rear drive shaft
and rear output flange of
gear box assembly.
Caution: The drive shaft
assembly is composed 18# Wrench
of slidable spline sleeve,
please take care to avoid per-
sonal injury caused by falling
P18T00037
of slide shaft fork during
removal.
10. Remove the coupling lock-
nut between intermediate
drive shaft and front output
flange of transmission
assembly.
21# Wrench

P18T00038
 3-27
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
11. Remove the hose assembly
or the hose connected with
hydraulic pump from the
gearbox assembly, and refer
to removal of hydraulic sys-
tem for detailed procedures.

P18T00039

12. Remove the hose assembly

connected with brake sys-
tem from the emergency
parking brake chamber.

24# Wrench

P18T00040

13. Remove the bolts and

washer for attaching the
transmission mount to the
frame with an air gun.
46# wrench, 46#
socket,
pneumatic
impact wrench

P18T00041
3-28
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
14. Pre-lift the gear box assem-
bly through the lugs with lift-
ing device.

Sling
(2 tons)

P18T00042

15. Remove the cover plate

from the transmission
assembly with a wrench.

13# Wrench

P18T00043

16. Remove the fastening bolts

used to attach the gear box
assembly to the engine fly-
wheel with a wrench.

16# Wrench

P18T00044
 3-29
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
17. Remove the fastening bolts
used for attaching the gear
box assembly-torque con-
verter case to the engine
housing with an blower gun 16# socket,
and socket. pneumatic
impact wrench

P18T00045

18. Separate the transmission

assembly from the engine,
and secure the torque con-
verter case and core
through the bolt holes with
ropes and steel wires. Steel wire

P18T00046

19. Lift up the gear box assem-

bly from the machine
through the lugs with the
hoisting device and ropes
and place it in a safe area.

Sling
(2 tons)

P18T00047
3-30
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Installation of torque converter-gear box system

Tools required
Reference picture Operation step
(Remarks)
1. Wipe clean the drain plug of
gear box, and then install it
in the threaded hole of gear 34# socket, 13#
box and tighten it with a socket,
torque of 600±70Nm\ pneumatic
442.5±51.6 lbf•ft. impact wrench,
open-end 34#
fixed torque
spanner
P18T00048

2. Secure the torque converter

to its housing through
threaded holes with the steel
wire or ropes.
Danger: The torque con-
verter can slide freely on
the guide wheel seat. When Steel wire
lifting up it, the torque con-
verter and its housing must
P18T00049
be secured firmly with the
steel wire or ropes, in order to
avoid personal injury due to
falling of torque converter.
3. Lift up the gear box assem-
bly onto the machine
through the lugs of gear box
assembly with the hoisting
device and ropes.

Sling
(2 tons)

P18T00050
 3-31
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
4. Move gear box assembly to
fit it with engine flywheel
housing, and install the bolts
and hard washer used for 16# socket,
tightening the torque con- pneumatic
verter case to the engine impact wrench,
housing and then tighten open-end 16#
them. Tightening torque: fixed torque
72±6Nm\ 53.1±4.4 lbf•ft. spanner

P18T00051

5. Crank the engine flywheel

case to make the torque
converter align with mount-
ing threaded hole on the 16# socket,
engine flywheel, screw and pneumatic
tighten the fastening bolts impact wrench,
and washer for attaching the open-end 16#
torque converter to the fixed torque
engine flywheel by hand spanner
with a torque of 60±5Nm\
P18T00052 44.25±3.7 lbf•ft

6. Install the mounting hole

cover plate on the gear box.

13# Wrench

P18T00053
3-32
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
7. Screw and tighten the bolts
and washer for fastening the
gear box mount to the frame 46# wrench, 46#
with the torque of socket,
2035±170Nm\ pneumatic
1500.8±125.38 lbf•ft. impact wrench,
open-end 46#
fixed torque
spanner
P18T00054

8. Attach the mounting end

flanges of drive shaft and
gear box to the rear output
flange of gear box, and
tighten the locknut to 18# wrench or
132±10Nm\ 97.35±7.38 open-end 18#
lbf•ft. fixed torque
spanner

P18T00055

9. Attach the intermediate drive

shaft to front output flange of
gear box and tighten the
locknut to 200±15Nm\
147.5±11.06 lbf•ft. 21# wrench or
open-end 21#
fixed torque
spanner

P18T00056
 3-33
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
10. Install the oil filler steel-pipe
on the gear box and tighten
the set bolts with a torque of
26±3Nm\ 19.18±2.21 lbf•ft.
13# wrench or
open-end 13#
fixed torque
spanner

P18T00058

11. Install the hose referring to

the hydraulic installation and
hydraulic pump.

P18T00058

12. Install the hose assembly

used for attaching the oil fil-
ter pipe to the gear box, and
the tightening torque of hose
joint is 137±6Nm\ 41# wrench or
101.04±4.43 lbf•ft. open-end 41#
Caution: Two hose fixed torque
assemblies are spanner
respectively connected to the
P18T00059
inlet, outlet of fine oil filter in
directions as required,
avoiding installation error.
3-34
Removal and Installation January 24, 2017
Removal and installation of torque converter-gearbox system CLG835H

Tools required
Reference picture Operation step
(Remarks)
13. Install the hose assembly
used for attaching the radia-
tor pipe to the gear box, and
the tightening torque of hose
joint is 137±6Nm\ 41# wrench or
101.04±4.43 lbf•ft. open-end 41#
fixed torque
spanner

P18T00060

14. Install the hose assembly

used for attaching the test
pipe to the gearbox, as
shown in the following figure
and table.
18# Wrench

P18T00061

Layout of test points of shift control valve

58

66
63

34
21
57 65 P18T00062

56
53

55 60 51

P18T00062
 3-35
January 24, 2017 Removal and Installation
CLG835H Removal and installation of torque converter-gearbox system

Tools required
Reference picture Operation step
(Remarks)
Logic diagram of test points and gear clutch

Theoretical S/N in the corre-

Decal marker Meanings
value sponding valve
PRESSURE OF IN FRONT Inlet pressure of torque Opening pres-
51
OF THE CONVERTER converter sure: 1.1 MPa
PRESSURE OF KV CLUTCH KV clutch pressure 1.6-1.8MPa 53
PRESSURE OF KR CLUTCH KR clutch pressure 1.6-1.8MPa 55
PRESSURE OF K1 CLUTCH K1 clutch pressure 1.6-1.8MPa 56
PRESSURE OF K2 CLUTCH K2 clutch pressure 1.6-1.8MPa 57
PRESSURE OF K3 CLUTCH K3 clutch pressure 1.6-1.8MPa 58
PRESSURE OF K4 CLUTCH K4 clutch pressure 1.6-1.8MPa 59

Mapping diagram of centralized measuring point

mounting plate and measuring point

P18T00063

15. Install the hose assembly

used for attaching emer-
gence parking brake cham-
ber to the brake system, the
tightening torque is 24# wrench or
37±2Nm\ 27.29±1.48 lbf•ft. open-end 24#
fixed torque
spanner

P18T00064
3-36
Removal and Installation January 24, 2017
Disassembly and assembly of torque converter-gearbox assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
16. Fill the gear box by referring
to the Operation Manual of
this machine, and check the
oil level according to the
specified method.

Disassembly and assembly of torque converter-gearbox assembly

For disassembly and assembly of torque converter-gear box assembly in this machine, refer to "ZF Gear
Box Overhaul Manual".
 3-37
January 24, 2017 Removal and Installation
CLG835H Removal and installation of drive shaft system

Removal and installation of drive shaft system

Removal of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
1. Park the machine on a level
ground, turn off the engine,
and place the gear box han-
dle in neutral position, pull
up the emergency parking
brake lever and place the
wedges.
Caution: The drive shaft
assembly is composed
of slidable spline sleeve,
please take care to avoid per-
sonal injury caused by falling
of slide shaft fork during
removal.
2. Remove the connecting
locknut between the rear
drive shaft and rear axle
input flange with a wrench.

18# Wrench

P18T00065

3. Remove the connecting

locknut between rear drive
shaft and rear output flange
of gear box with a wrench,
and place the rear drive
shaft assembly in a safe 18# Wrench
area.

P18T00066
3-38
Removal and Installation January 24, 2017
Removal and installation of drive shaft system CLG835H

Tools required
Reference picture Operation step
(Remarks)
4. Remove the connecting
locknut between intermedi-
ate drive shaft and front out-
put flange of gear box
assembly with a wrench.
21# Wrench

P18T00067

5. Remove tightening bolt and

nut between intermediate
drive shaft and front drive
shaft & bearing assembly,
and remove the intermediate
drive shaft from machine 18# Wrench
with a wrench.

P18T00068

6. Remove the bolts and

washer securely connecting
the front drive shaft and sup-
port assembly to middle
support plate with a wrench.
18# Wrench

P18T00069
 3-39
January 24, 2017 Removal and Installation
CLG835H Removal and installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
7. Remove the bolts and nuts
securely connecting the
front drive shaft and support
assembly and front axle,
and remove front drive shaft
and support assembly from 18# Wrench
machine with a wrench.

P18T00070

8. Remove the tightening bolts

and washers of the support
plate and frame with a
blower gun or a wrench.
24# socket,
pneumatic
impact wrench
or 24# wrench

P18T00071

Installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
1. Wipe clean the surface,
install rear drive shaft and
rear axle input flange, and
align the the mounting
holes, then insert the tight- 18# wrench or
ening bolt and screw in the open-end 18#
nut and tighten it with a fixed torque
torque of spanner
132±10Nm\97.35±7.38 lbf•ft.

P18T00072
3-40
Removal and Installation January 24, 2017
Removal and installation of drive shaft system CLG835H

Tools required
Reference picture Operation step
(Remarks)
2. Wipe clean the surface,
install the rear drive shaft
and rear output flange of the
gear box, and align the
mounting holes, screw in the
locknut and tighten it with a
torque of 132±10Nm\ 18# wrench or
97.35±7.38 lbf•ft. open-end 18#
fixed torque
Caution: When assem- spanner
P18T00073
bling, please make sure
to pay attention to the white
arrows on the identification of
drive shaft, both of which
must be aligned after assem-
bly!
3. Wipe clean the two mount-
ing surfaces of support
plates, and then pre-install it
onto the front frame. Set the
front drive shaft and support
assembly with middle sup-
port bearing on the front
frame middle support bear-
ing seat support plate.

P18T00074

4. Wipe clean the surface,

install the front drive shaft
and support assembly with
front axle input flange, and
align the mounting hole, 18# wrench or
screw in the locknut and open-end 18#
tighten it with a torque of fixed torque
132±10Nm\97.35±7.38 lbf•ft. spanner

P18T00075
 3-41
January 24, 2017 Removal and Installation
CLG835H Removal and installation of drive shaft system

Tools required
Reference picture Operation step
(Remarks)
5. Wipe clean the mounting
surfaces of front output
flange of gear box and inter-
mediate drive shaft flange,
and install the intermediate 21# wrench or
drive shaft to the front output open-end 21#
flange bolts of gear box, fixed torque
screw in the locknut and spanner
tighten it with a torque of
200±15Nm\ 147.5±11.06
P18T00076 lbf•ft.

6. Install the middle drive shaft,

front drive shaft and support
assembly, and align the
mounting holes. Insert the
tightening bolt and screw in
the locknut, and then tighten
them to 132±10Nm\ 18# wrench or
97.35±7.38 lbf•ft. open-end 18#
fixed torque
Caution: The intermedi- spanner
P18T00077
ate drive shaft middle
shaft fork must be aligned
with the fork which is coupled
with front axle on the front
drive shaft and support
assembly!
7. Adjust the front&rear,
left&right positions of inter-
mediate, front drive shafts
and support assembly to
make sure that the bolts Open-end 18#
between support plate and fixed torque
frame can be screwed in spanner or 18#
smoothly with torque of wrench
132±10Nm\ 97.35±7.38lbf•ft.

P18T00078
3-42
Removal and Installation January 24, 2017
Removal and installation of front axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
8. Install the tightening bolts
and washer of the middle
support bearing seat and
support plate, and tighten 24# socket, fixed
them to 22494±18.44 lbf•ft. torque blower
gun or open-end
24# fixed torque
spanner

P18T00079

Removal and installation of front axle assembly

Removal of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine, step on
the service brake pedal for Sling
several times, so as to
release the pressures of (12 tons)
energy accumulator and
axle brake pipe.
3. Lift up the machine with a
lifting device, and support it
up with a supporting device
with 4 tires off the ground
 3-43
January 24, 2017 Removal and Installation
CLG835H Removal and installation of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
4. Pre-lift up the tires with a
hoist, remove the bolts and
nuts used for tightening the
rim and axle. Sling(2 tons)30#
socket,
5. Lift the tires away from pneumatic
machine and put them in a impact wrench
safe area. or open-end 30#
6. Repeat steps (4), (5), wrench
remove another tire installed
P18T00080 on the front axle.

7. Remove the hose assembly

connected to service brake
system and the front axle.
Caution: The waste oil
shall be recovered in a
container during removal, in
order to avoid environmental
contamination. The removed
hose is shielded to avoid con-
24# Wrench
P18T00081
tamination of parts.
Danger: It is sure that the
hose pressure is fully
discharged and the oil is
cooled sufficiently before
removal of hose, in order to
avoid personal injury of hose
pressure and hot oil during
removal.
8. Pre-lift the front axle assem-
bly with a sling.
9. Remove the bolts and nuts
for connecting the front axle
assembly to the front frame
with a blower gun. Sling(2 tons)40#
socket,
10. Put the axle assembly onto pneumatic
the ground slowly with a lift- impact wrench,
ing device. 40# wrench
P18T00082
11. Remove the axle assembly
from the bottom of machine
with a handling equipment,
and then put it on the appli-
ance for axle assembly.
3-44
Removal and Installation January 24, 2017
Removal and installation of front axle assembly CLG835H

Installation of front axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Take the front axle assembly
out of placed area with a
handling device, and posi-
tion it under its mounting Sling(2 tons) 46#
point. socket,
pneumatic
2. Lift up the front axle assem-
impact wrench,
bly with a hoist, and install it
open-end 46#
on the frame.
fixed torque
3. Install the tightening bolts spanner
P18T00083 and nuts and tighten them
with torque of 2035±170Nm\
1500.8±125.38 lbf•ft.
4. Install the front axle brake
pipe and service brake
hose. Tightening torque:
37±2Nm\ 27.29±1.48 lbf•ft.
Open-fixed 24#
fixed torque
spanner

P18T00084

5. Lift up the tire with a hoist

and install it onto the axle,
Sling
and then install the rim nut
and tighten it to 600±60Nm\ (2 tons)30#
442.5±44.25 lbf•ft. socket,
pneumatic
impact wrench,
open-end 30#
fixed torque
spanner
P18T00085

6. Lift the machine with a hoist,

remove the support device, Sling
and put the machine onto (12 tons)
the ground.
 3-45
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Removal and installation of rear axle assembly

Removal of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Stop the machine on a level
ground, put the work imple-
ment, bucket levelly, and pull
up the emergency parking
brake lever.
2. Turn off the engine, step on
the service brake pedal for Sling
several times, so as to
release the pressures of (12 tons)
energy accumulator and
axle brake pipe.
3. Lift up the machine with a
lifting device, and support it
up with a supporting device
with 4 tires off the ground
4. Pre-lift up the tires with a
hoist, remove the bolts and
nuts used for tightening the Sling
rim and axle.
(2 tons)30#
5. Lift the tires away from socket,
machine and put them in a pneumatic
safe area. impact wrench
or open-end 30#
6. Repeat steps (4), (5),
wrench
remove another tire installed
P18T00086 on the rear axle.

7. Remove the the rear axle

and hose assembly
connected to service brake
system.

24# Wrench

P18T00087
3-46
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
8. Remove the steel pipe
connected to the rear axle
and centralized lubricating
system.

Open-end 16#
wrench

P18T00088

9. Pre-lift the rear axle

assembly with a sling.
10. Remove the bolts and
locknuts for connecting the
rear axle assembly to the
rear frame. Sling (2 tons)
36# socket,
11. Put the axle assembly onto pneumatic
the ground slowly with a impact wrench,
lifting device. 36# wrench,
P18T00089
12. Remove the axle assembly
from the bottom of machine
with a handling equipment,
and then put it on the
appliance for axle assembly.
13. Place the axle assembly as
shown in the left figure to
make front swing frame
support shaft upward, and
rear swing frame support
shaft downward.

P18T00090
 3-47
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
14. Remove the seal ring and
snap ring from the front
swing support rack with a
screwdriver.
Straight
screwdriver

P18T00091
15. Remove the front swing
support rack from axle
assembly with a lifting
device and place it in a safe
area. Sling
(2 tons)

P18T00092
16. Place the axle assembly as
shown in the left figure to
make the rear swing support
rack upward.

P18T00093

17. Remove the bolts, washers

with a wrench or an
pneumatic tool.

Open-end 18#
wrench

P18T00094
3-48
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
18. Remove the cover.

Open-end 18#
wrench

P18T00095
19. Remove the thrust washer.

Straight
screwdriver

P18T00096

20. Remove the bolts and

washer tightening the
clamping plate.
Open-end 27#
wrench or 27#
socket,
pneumatic
impact wrench

P18T00097

21. Remove the clamping plate.

Straight
screwdriver

P18T00098
 3-49
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
22. Remove the thrust washer.

Straight
screwdriver

P18T00099
23. Remove the rear swing
support rack with a lifting
device.

Sling
(2 tons)

P18T00100

24. Screw the M8 bolt in the

dowel and remove the
dowel.

Open-end 13#
wrench

P18T00101

25. Remove the bolts and wash-

ers tightening the support
shaft.
Open-end 21#
wrench or 21#
socket,
pneumatic
impact wrench

P18T00102
3-50
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
26. Remove the support shaft
with a lifting device.

Sling
(2 tons)

P18T00103

Installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
1. Lift up the axle assembly
and position it as shown in
the left figure onto a special
assembly device.

P18T00104

2. Wipe clean the mounting

face between the support
shaft and the axle case
connected to it with a clean
cloth, install the support
shaft onto the axle and align Copper bar
two dowel pins accurately,
strike it into the dowel pin
with a copper bar.

P18T00105
 3-51
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
3. Apply thread lock sealant to
thread portions of bolts,
screw them into support
24# socket,
thread holes by 2-3 threads
pneumatic
by hand, and tighten them
impact wrench,
with an air gun. Tightening
open-end 24#
torque: 305±25Nm\
fixed torque
22494±18.44 lbf•ft.
spanner

P18T00106

4. Horizontally place rear

swing frame with the thread
hole end upward, and install
the bush into rear swing
support rack.

P18T00107

5. Turn over swing frame by

180°, install seal ring and
knock it to the end with
nylon hammer.

Nylon hammer

P18T00108

6. Turn over swing frame group

by 180°, evenly apply
molybdenum disulfide
lithium base grease to
bushing cone, and install
rear swing frame group into
spindle with lifting device.

P18T00109
3-52
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
7. Install thrust washer and
pressing plate and align the
holes well.

P18T00110

8. Apply thread lock sealant to

thread portion of bolt, screw
bolts and hard washers into
the clamping plate thread 24# socket,
holes by 2-3 teeth by hand, pneumatic
and drive them in impact wrench,
symmetrically with open-end 24#
pneumatic impact wrench fixed torque
with the tightening torque of spanner
305±25Nm\ 224.94±18.44
P18T00111 lbf•ft.

9. Put a thrust washer and

cover and align the holes
well.

P18T00112

10. Apply thread lock sealant to

thread of bolts, screw bolts
and hard washers into cover
thread holes by 2-3 teeth by 21# socket,
hand, and drive them in pneumatic
symmetrically with impact wrench,
pneumatic impact wrench open-end 21#
with the tightening torque of fixed torque
195±15Nm\ 143.81±11.06 spanner
lbf•ft.
P18T00113
 3-53
January 24, 2017 Removal and Installation
CLG835H Removal and installation of rear axle assembly

Tools required
Reference picture Operation step
(Remarks)
11. Horizontally place front
swing frame, and knock seal
ring into front swing frame
mounting hole to the end
with nylon hammer.
Nylon hammer
Caution: The seal ring lip
faces outward.
Seal
Sealring
ringliplip

P18T00114

12. Press the bushing into the

front swing frame to the bot-
tom
Caution: The small hole
of bushing must toward
the lug end of front swing
support.

P18T00115

13. Install the snap ring into the

groove with straight screw-
driver.

Straight
screwdriver

P18T00116

14. Knock seal ring into front

swing frame mounting slot to
the end with nylon hammer;
Caution:The seal ring lip
faces outward.

Seal
Sealring
ringliplip

P18T00117
3-54
Removal and Installation January 24, 2017
Removal and installation of rear axle assembly CLG835H

Tools required
Reference picture Operation step
(Remarks)
15. Evenly apply the molybde-
num disulfide lithium base
grease to bushing cone, and
then lift and install the front
swing support subassembly
onto the bearing seat of the
main transmission.
Sling
16. Place the axle assembly on
a transport device with a lift- (2 tons)
P18T00118
ing device, and right under
mounting point of rear axle.
17. Install the axle assembly
onto the rear frame with a
lifting device and align the
mounting holes.
18. Install the mounting bolts,
washers and nuts of the axle
assembly and tighten them
with an blower gun to 36# socket,
1122±90Nm\ 827.28±66.38 pneumatic
lbf•ft. impact wrench,
open-end 36#
fixed torque
spanner

P18T00119

19. Install the axle and hose

connecting the service brake
pipe and tighten it to
37±2Nm\ 27.29±1.48 lbf•ft.

Open-end 24#
wrench

P18T00120
 3-55
January 24, 2017 Removal and Installation
CLG835H Disassembly and assembly of the drive axle

Tools required
Reference picture Operation step
(Remarks)
20. Lift up the tire with a hoist
and install it onto the axle,
and then install the rim nut
and tighten it to 600±60Nm\ 30# socket,
442.5±44.25 lbf•ft. pneumatic
impact wrench
or open-end 30#
fixed torque
spanner

P18T00121

21. Install the steel pipe con-

necting the centralized lubri-
cating system and axle.

Open-end 16#
wrench

P18T00122

22. Lift the machine with a hoist,

remove the support device, Sling
and put the machine onto (12 tons)
the ground.

Disassembly and assembly of the drive axle

For disassembly and assembly of the drive axle in this machine, see "835H Drive Axle Service Manual"
for details.
3-56
Fault Diagnosis and Troubleshooting Methods January 24, 2017
Disassembly and assembly of the drive axle CLG835H

Fault Diagnosis and Troubleshooting Methods

Fault inspection and

Fault features Main reasons
troubleshooting
1. Start circuit of the base machine (such as 1. Check the circuit of the base machine.
power voltage, electric lock, startup relay
and startup motor) has faults.
2. The lever is not at the neutral position. 2. Shift the lever to neutral position.
The engine can not 3. The fuse to the control circuit on the base 3. Replace the fuse.
1
Activation machine is burnt.
4. Poor contact of handle plug or the handle 4. Organize the plugs.
is failed.
5. Poor contact of controller plug or the con- 5. Organize the plugs.
troller is failed.
1. Oil pressure gauge is failed. 1. Replace the oil pressure gauge
2. Insufficient tightening torque for bolt of 2. Tightening torque for M8-8.8 bolt of shift
Low shift pressure shift control valve. control valve is 26Nm.
2 at all gears 3. Spring of main pressure valve is broken. 3. Replace it.
Low pressure 4. Gear shift pump is worn 4. Replace the gear shift pump.
5. Fragments enter into shift control valve or 5. Replace the filter, and clean the control
valve is stuck valve.
1. O-ring in throttle plug is damaged 1. Replace the O-ring
Too short shifting
3 2. The tightening torque of pressure control 2. Tightening torque for M8-8.8 bolt of shift
time at all gears
valve bolts is out of specified range control valve is 26Nm.
Too long shifting 1. Throttle plug is blocked. 1. Clean and dredge.
4
time at all gears 2. Pressure control valve is stuck. 2. Wash and check.
1. Oil temp sensor is failed. 1. Replace the part.
2. Oil temperature gauge is failed. 2. Replace the part.
The oil tempera- 3. Insufficient oil level. 3. Check oil level following the correct
5 ture of the torque method.
converter is high 4. Air found in torque converter oil radiator. 4. Exhaust.
5. Oil line from torque converter to radiator is 5. Check oil pipe from radiator to gear box
poor. and radiator for blockage.
1. Poor cooling capability of radiator. 1. Check whether cooling capability is suffi-
cient, such as checking the degree of
tightness for engine fan belt and dirt
The oil tempera- attached to outer surface of radiator.
6 ture of the torque 2. Back pressure valve of torque converter 2. Be careful to check hose connector from
converter is high stuck. gear box to radiator. If hose connector
enters housing too deeply, pushes spool
of pressure valve and cause valve to stick,
oil line will be getting blocked.
 3-57
January 24, 2017 Fault Diagnosis and Troubleshooting Methods
CLG835H Disassembly and assembly of the drive axle

Fault inspection and

Fault features Main reasons
troubleshooting
1. Insufficient oil level. 1. Check oil level and add the oil by following
the right operation.
2. Elastic plate connecting engine and 2. Replace the elastic plate or replace the
torque converter is torn, or power connec- related damaged parts.
tion from torque converter to gear box
input gear has faults.
3. Circuit failure of the complete machine. 3. Check the power voltage for abnormal
Vehicle does not and the cable for damage.
7
move at any gear
4. Shift pressure is too low. 4. Refer to the troubleshooting above.
5. Solenoid valve is damaged. 5. Check if the rated current of solenoid
valve is 830 mA.
6. Shift lever is damaged. 6. Refer to the troubleshooting for lever.
Replace it.
7. Controller is damaged. 7. Refer to the fault inspection of controller.
Replace it
3-58
Testing and adjustment January 24, 2017
Power Train Test CLG835H

Testing and adjustment

Power Train Test

Detection point layout of torque converter - gear box assembly as is shown in Figure 3-25, and names
and parameters of each detection point can be found in Table 3-7.
Figure 3-25 Measuring point layout

58

66
63

34
21
57 65

56
53

55 60 51
P18T00123

Table 3-7 Parameter list of the measuring point

S/N of the S/N of the

Name of the measuring Name of the Theoretical
measur- Theoretical value measuring
point measuring point value
ing point point
Input sensor of the gear
21 \ 55 Reverse gear clutch 1.6-1.8MPa
box
Output sensor of the
34 \ 58 Gear 3 clutch 1.6-1.8MPa
gear box
Inlet pressure of torque
51 Opening pressure: 0.85 56 Gear 1 Clutch 1.6-1.8MPa
converter
53 Forward gear clutch 1.6-1.8MPa\232-261psi 57 Gear 2 Clutch 1.6-1.8MPa
Pressure of shift control Outlet pressure of Opening
65 1.6-1.8MPa\232-261psi 63
system torque converter pressure: 0.5
60 Gear 4 Clutch 1.6-1.8MPa\232-261psi

Logical relations between gear states and working conditions of shift control valve solenoid valve can be
found in Table 3-8.
 3-59
January 24, 2017 Testing and adjustment
CLG835H Power Train Test

Table 3-8 Logical relations between gear states and working conditions of shift control valve
solenoid valve

Electric condition of the solenoid valve

Sole-
noid Forward gear Reverse gear Neutral gear
valve
1 2 3 4 1 2 3 1 2 3 4
M1 ● ● ●
M2 ● ● ●
M3 ● ● ●
M4 ● ● ● ● ● ●
M5 ●
Clutch KV KV KV K4 KR KR KR
K3
Clutch K1 K2 K3 K3 K1 K2 K3

Remarks: ● means the solenoid valve is energized;

Test Requirements:
Testing dynamic unbalance value
After the drive shaft is repaired, a professional dynamic unbalance test must be performed.
3-60
Testing and adjustment January 24, 2017
Power Train Test CLG835H
 4-1
January 24, 2017 Hydraulic System
CLG835H

Hydraulic System
Basic Information ............................................................................................................4-5
Safety precautions for hydraulic system ................................................................................................4-5
Overviews of hydraulic system...............................................................................................................4-8
Technical parameters of hydraulic system...........................................................................................4-11
Hydraulic System Principle Schematic.................................................................................................4-11
Universal tools and tooling for hydraulic maintenance.........................................................................4-12
Special tools and tooling for hydraulic maintenance ............................................................................4-13

Structure Function Principle ........................................................................................4-18

Work hydraulic system .........................................................................................................................4-18
Hydraulic oil tank..............................................................................................................................4-19
Plunger pump...................................................................................................................................4-20
Boom cylinder ..................................................................................................................................4-22
Bucket cylinder.................................................................................................................................4-22
Control valve ....................................................................................................................................4-23
Pilot valve.........................................................................................................................................4-36
Steering hydraulic system ....................................................................................................................4-37
Steering pump..................................................................................................................................4-40
Metering pump .................................................................................................................................4-40
Priority valve.....................................................................................................................................4-42
Steering cylinder ..............................................................................................................................4-45
Brake system .......................................................................................................................................4-46
Brake pump......................................................................................................................................4-50
Brake valve ......................................................................................................................................4-54
Charge valve ....................................................................................................................................4-57
Accumulator assembly .....................................................................................................................4-59
Brake cylinder ..................................................................................................................................4-62
Hydraulic cooling system .....................................................................................................................4-64
Cooling pump ...................................................................................................................................4-68
Cooling motor...................................................................................................................................4-68
Solenoid directional valve ................................................................................................................4-69
Emergency steering system.................................................................................................................4-71
Pilot system of electronic control third linkage .....................................................................................4-73

Testing and Adjustment................................................................................................4-75

4-2
Hydraulic System January 24, 2017
CLG835H

Pressure release of hydraulic system ..................................................................................................4-75

Pressure test of work hydraulic system................................................................................................4-78
Positions of every gauging points of working hydraulic system .......................................................4-78
Description of every gauging points of working hydraulic system....................................................4-79
Inspection and adjustment for pressure of working hydraulic pressure system...............................4-80
Pressure inspection and adjustment of overload valve of bucket tilting large chamber...................4-84
Pressure inspection and adjustment of overload valve of bucket tilting small chamber ..................4-86
Pressure inspection and adjustment of main safety valve of control valve ......................................4-88
Inspection and adjustment for cut-off pressure of working pump.....................................................4-90
Adjustment for LS relief pressure of control valve............................................................................4-92
Pressure inspection and adjustment of the pilot oil supply valve .....................................................4-94
Boom cylinder test............................................................................................................................4-96
Bucket cylinder test ..........................................................................................................................4-97
Steering hydraulic system test .............................................................................................................4-98
Measuring point position of steering hydraulic system.....................................................................4-98
Description of measuring points of steering hydraulic system .........................................................4-99
Pressure testing and adjustment of steering hydraulic system ........................................................4-99
Steering cylinder test......................................................................................................................4-101
Brake system test ..............................................................................................................................4-102
Layout of pressure measuring points of brake system...................................................................4-102
Test method of rear axle brake pressure ......................................................................................4-103
Test method of front axle brake pressure ......................................................................................4-105

Removal and Installation ............................................................................................4-106

Work hydraulic system .......................................................................................................................4-106
Removal and installation of hydraulic oil tank assembly ................................................................4-106
Removal and installation of the plunger pump ...............................................................................4-110
Removal and installation of boom cylinder.....................................................................................4-115
Disassembly and assembly of boom cylinder ................................................................................4-120
Removal and installation of bucket cylinder ..................................................................................4-133
Disassembly and assembly of bucket cylinder...............................................................................4-137
Removal and installation of control valve.......................................................................................4-150
Removal and installation of pilot valve assembly..........................................................................4-159
Steering hydraulic system ..................................................................................................................4-163
Removal and installation of metering pump ...................................................................................4-163
Removal and installation of priority valve.......................................................................................4-167
 4-3
January 24, 2017 Hydraulic System
CLG835H

Removal and installation of steering cylinder.................................................................................4-170

Disassembly and assembly of steering cylinder ............................................................................4-174
Brake system .....................................................................................................................................4-187
Removal and installation of brake pump ........................................................................................4-187
Removal and installation of brake valve.........................................................................................4-187
Disassembly and assembly of brake valve ....................................................................................4-190
Removal and installation of charge valve.......................................................................................4-202
Disassembly and assembly of charge valve ..................................................................................4-205
Removal and installation of accumulator .......................................................................................4-219
Removal and installation of brake cylinder.....................................................................................4-220
Hydraulic cooling system ...................................................................................................................4-221
Removal and installation of cooling pump......................................................................................4-221
Removal and installation of cooling motor ....................................................................................4-224
Removal and installation of solenoid directional valve...................................................................4-227
Secondary steering system................................................................................................................4-229
Removal and installation of secondary steering pump...................................................................4-229
Pilot system of electronic control third linkage ...................................................................................4-231
Removal and installation of proportional valve...............................................................................4-231

Fault Diagnosis and Troubleshooting .......................................................................4-233

Common troubleshooting for brake system .......................................................................................4-233
4-4
Hydraulic System January 24, 2017
CLG835H
 4-5
January 24, 2017 Basic Information
CLG835H Safety precautions for hydraulic system

Basic Information

Safety precautions for hydraulic

system

Compressed air
P11000204
Compressed air may cause personal injury.
Even if the pressured liquid is leaked from a hole
When using the compressed air for cleaning,
as small as a pin hole, it may penetrate the
wear the mask, protection suits and shoes. Do
muscles and lead to death. If shot by the spouted
not point the compressed air at yourself or
high-pressure oil, please contact a doctor and
anyone. The compressed air may penetrate the
take a medical treatment immediately.
skin and lead to severe injury or even death. The
maximum pressure of the compressed air for Safe disposal of waste liquid
cleaning should be lower than 0.2 Mpa(29psi).
Inappropriate disposal of waste liquid will
High-pressure solution endanger environment and ecology. Please
observe local laws and regulations when dispose
Prevent from being scalded by high-pressure oil.
the waste liquid.
When overhauling or replacing the pipes of
hydraulic system, check whether the pressure of It is mandatory and necessary to collect the
system had been released. Hydraulic oil under liquid with containers spattered during the
pressure will damage your skin severely when it inspection, maintenance, test, adjustment and
spattered on you. repair of machine. Proper container shall be
prepared well before opening any fluid cavity or
Take care when remove the hydraulic pipelines
disassembling the parts containing liquid. Use
or connectors. When the oil spouts, the released
proper container when draining liquid.
high-pressure oil may lead to the continuous
movement of the hoses. Do not use the food or drink containers because
they may be drunk by others by mistake.
Please wear safety glasses and leather gloves
when checking for leakages. Do not use bare
hands to check the leakage but plate or paper
plate.

P11000134 P19M00059

Precautions for accumulator application

The dangerous high-pressure nitrogen is

contained in the accumulator, so read the
following requirements and properly use the
accumulator.
4-6
Basic Information January 24, 2017
Safety precautions for hydraulic system CLG835H

The accumulator shall be checked before charge When working under the work implement, you
of nitrogen. It is prohibited to charge the shall support the equipment properly. Do not
accumulator with gas if the accumulator does not support the work implement depending on
have a nameplate, or the words on the hydraulic cylinder. If control mechanism moves
nameplate are missed so that its type can not be or hydraulic oil line leaks, work implement will
identified, or if the steel seal marks are drop. If it is necessary to remove the shield, you
incomplete or cannot be read clearly, or if there is shall fix it well after the repair.
defect with the housing and therefore safe use
Unless otherwise stated, any adjustment is not
cannot be ensured.
permitted to be performed when machine or
The accumulator can only be filled with nitrogen engine is running. If the repair procedure must
other than oxygen, compressed air or other be performed when machine is running, do not
flammable air to avoid explosion. let the machine stay in an unattended status.
Arrange one operator seated in the seat and
Slowly charge the nitrogen into the accumulator
prepare to shut down the engine at any time.
so as to avoid the breakage of the rubber bag.
Do not use twisted or worn wire rope. Wear
gloves during operation and move.
When forcing to extrude the bayonet, you shall
make sure no one is standing around it. You shall
wear safety goggles in order to protect your
eyes.
When knocking object with hammer, please
make sure the flying debris will not hurt others.
P11000190
Oil
The air valve of the accumulator shall be
installed upward vertically. The accumulator shall Hot oil and parts will cause personnel injury, and
be stably fixed on the bracket without being do not let the hot oil and parts contact your skin.
welded.
Do not drill any hole on the accumulator or carry
open fire or heat sources close to the
accumulator.
Do not conduct any welding operation on the
accumulator.
Since the accumulator is a high-pressure
container, it shall be replaced and repaired by P11000148
professional operators.
At working temperature, the hydraulic oil tank is
Release the air before discarding the waste hot and contains pressure. When opening oil
accumulator. filler cap of hydraulic oil tank, shut off the engine
and cool the filler cap down until it can be
Preventing extruding or cut off opened by bare hands. Remove the tank cover
slowly to release the pressure of hydraulic oil
Do not have your hands, arms or any other
tank so as to prevent from being scalded by hot
bodies placed between moving parts. For
oil.
example, between work implement and cylinder,
between machine and working implement. Release pressure of the system before
disassembling all pipes, connector, or relevant
parts.
 4-7
January 24, 2017 Basic Information
CLG835H Safety precautions for hydraulic system

Pipeline, pipe and hose Do not use the accessories unauthorized by

LiuGong. Using unauthorized accessories will
Do not warp or knock the high-pressure pipeline, cause safety issues, do harm on the normal
and do not install the abnormally warped or operation of machine and influence its service
broken pipe or hose onto the machine. life.
Repair the loose or damaged pipe and hose of It is forbidden to make any refit on the
fuel and lubricant pipeline and hydraulic system accessories without permissions; otherwise you
in time. Leakage will cause fire hazard, and if shall bear the responsibility.
repair or replacement is necessary, please
contact the authorized dealer by LiuGong LiuGong Machinery Co., Ltd will not be
Machinery Co., Ltd. responsible for the injury, accident and damage
of machine due to using unauthorized
If following problems occur, it shall be replaced. accessories.
● Damage or leakage of connector.
● The outer layer of hose is worn or cracked,
and reinforced steel wires are exposed.
● Partial bulge of hose.
● The hose is twisted or flattened.
● The hose reinforcement steel has embedded
to the outer layer.
● Misplacement of the end connectors.
Make sure all clamps, guard and heat shield are
installed correctly to prevent shaking or
overheating by friction with other parts.
Otherwise, it will generate toxic gases resulting
in poisoning.

Precautions for accessories

It shall be installed and commissioned by

qualified personnel; the operator shall be trained,
and his/her operation and maintenance shall be
performed strictly according to the operation
instructions for accessories.
When installing and using the spare accessory,
please read related instructions, manuals and
informations about the accessories.
Incorrect installation or purchase of accessories
will not only cause safety issues, but also have
the negative effect on service life and operation
of the machine.
4-8
Basic Information January 24, 2017
Overviews of hydraulic system CLG835H

Overviews of hydraulic system

The hydraulic system is the actuator of the loader, mainly composed of four functional modules, i.e. a
work implement hydraulic system, a steering hydraulic system, a brake system and a hydraulic cooling
system. Where, the steering hydraulic system supplies oil for the steering circuit preferentially through
the priority valve to ensure steering function; the work hydraulic system controls the coordinated actions
of all oil cylinders through the control valve so that the loader can adapt to the requirements of different
working conditions; the brake system can realize the function of service brake and parking brake; the
hydraulic cooling system cools the hydraulic oil to ensure oil temperature within the reasonable scope of
work. Layout of CLG835H-T4F hydraulic system is as follows:
CLG835H-T4f Work hydraulic system

4
1
2 3

6 7
5 8
9 10
P18H00006

1. Bucket cylinder 6. Control valve

2. Proportional pressure-reducing valve 7. Shuttle valve
3. Hydraulic oil tank 8. Pilot oil filter
4. Pilot valve 9. Pilot oil supply valve
5. Boom cylinder 10.Plunger pump
 4-9
January 24, 2017 Basic Information
CLG835H Overviews of hydraulic system

CLG835H-T4f Steering hydraulic system

2
1
3

P18H00007

1. Steering cylinder 2. Metering pump 3. Priority valve

4-10
Basic Information January 24, 2017
Overviews of hydraulic system CLG835H

CLG835H-T4f brake system

1
2

6
3 4 7
5
P18H00008

1. Brake valve 5. Brake valve assembly

2. Gear pump 6. Accumulator assembly
3. High-pressure oil filter 7. Brake cylinder
4. Charge valve
 4-11
January 24, 2017 Basic Information
CLG835H Technical parameters of hydraulic system

Technical parameters of hydraulic system

Main technical parameters of CLG835H-T4F hydraulic system

Items Unit Theoretical value

Single-pump variable hydraulic
Type
system
Working pressure of the system Mpa\psi 19\2755
Pilot working pressure Mpa\psi 3.5\507.5
Work
hydraulic Displacement of working pump ml/r\cc/r 100\100
system Rated speed of the working pump r/min 2200
Boom cylinder (cylinder number --
mm\in 2-φ125×728\2-φ4.92×28.66
cylinder bore × stroke)
Bucket cylinder (cylinder number -
mm\in 1-φ140×520\1-φ5.51×20.47
cylinder bore × stroke)
Articulation frame and full hydrau-
Type
lic steering system
Working pressure of the system Mpa\psi 17.5
Displacement of steering pump ml/r\cc/r 100\100

Steering Rated speed of the steering pump r/min 2200

hydraulic Metering pump ml/r\cc/r 739/739
system
Amplification ratio of metering
1.6
pump
Steering angle ° 38°±1°for both left and right sides
Steering cylinder (cylinder number
mm\in 2-φ80×420\2-φ3.15×16.54
-- cylinder bore × stroke)
Dual-circuit full-hydraulic wet
Service Type
brake
brake system
System oil pressure Mpa\psi 6±0.4\870±58
Parking & Type Push-button hydraulic brake
emergency
brake system System oil pressure Mpa\psi 16\2320

Working Hydraulic oil L\US gal 105\27.7

medium Cleanliness NAS1638 ≤Grade 9

Hydraulic System Principle Schematic

Refer to attached drawing in Chapter 9 for schematic of hydraulic system

4-12
Basic Information January 24, 2017
Universal tools and tooling for hydraulic maintenance CLG835H

Universal tools and tooling for hydraulic maintenance

Common tools table

Name Specifications (Qty.)

Open-end wrench 8#, 13#, 15#, 17#, 19#, 21#, 22#, 24#, 27#, 30#, 32#, 36#, 41#, 44#, 46#
Straight screwdriver
Cross screwdriver
Pliers
20~100N•m\ 14.75~73.75lbf•bt, 90~300N•m\ 66.38~221.25lbf•bt, 160~680N•m\
Torque wrench
118~501.5lbf•bt
Inner hexagon spanner One set in metric standard and one set in British standard
Lifting equipment 2t
Sling 2t
Caution: the removed standard parts should be placed with relevant material together to
avoid being mixed.
 4-13
January 24, 2017 Basic Information
CLG835H Special tools and tooling for hydraulic maintenance

Special tools and tooling for hydraulic maintenance

List of special tools and tooling for boom and bucket cylinder

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

For assembling the O-

1 SP130702 Pry bar 1
ring of piston

For assembling dust

2 SP129313 Rubber hammer 1
ring of cylinder head

Tooling for com- For compressing dust

3 SP130917 1
pressing dust ring ring of cylinder head

For assembling the O-

4 SP130915 Guide sleeve 1
ring of piston rod
4-14
Basic Information January 24, 2017
Special tools and tooling for hydraulic maintenance CLG835H

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

For assembling
cylinder head
5 SP130700 Guide sleeve 1
assembly onto piston
rod

For aligning flange bolt

6 SP129308 Positioning tool hole with cylinder head 1
through hole

For aligning flange bolt

7 SP130698 Dowel pin hole with cylinder head 1
through hole

8 SP133205 Blower gun For pre-tightening bolt 1

9 SP129309 Socket For tightening bolt 1

 4-15
January 24, 2017 Basic Information
CLG835H Special tools and tooling for hydraulic maintenance

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

For snap ring of

10 SP130929 Steel wire scissors
cylinder head

List of special tools and tooling for steering cylinder:

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

Tooling for press For pressing and fitting

1 SP130702 fitting of friction the friction ring onto 1
ring piston

Tooling for com-

For compressing the
2 SP129313 pressing friction 1
friction ring
ring

For assembling
cylinder head
3 SP130917 Guide sleeve 1
assembly onto piston
rod

For assembling the O-

4 SP130915 Guide sleeve 1
ring of piston rod
4-16
Basic Information January 24, 2017
Special tools and tooling for hydraulic maintenance CLG835H

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

For assembling the

Tooling for press
5 SP130700 bushing onto cylinder 1
fitting of bushing
block

For supporting the

Cylinder block sup- cylinder block and
6 SP129308 1
port pressing the bushing
to the cylinder block

For detecting the size

of bushing which is
7 SP130698 Bushing detection 1
assembled onto the
cylinder block

For tightening the

8 SP133205 Blower gun 1
nylon locknut

For pressing the piston

9 SP129309 Copper bar rod into the cylinder
block
 4-17
January 24, 2017 Basic Information
CLG835H Special tools and tooling for hydraulic maintenance

Quantity for
LiuGong
S/N Tool description Figures Purpose full-time
No.
service dealers

For pre-tightening the

10 SP130929 Hook spanner cylinder head
assembly

For locking the

11 SP129306 Socket cylinder head
assembly
4-18
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

Structure Function Principle

Work hydraulic system

A: Overview-components and position

The work hydraulic system is used to control the actions of the boom and bucket of the loader work
implement and other additional work implement. It is a single-pump load sensing system (see schematic
diagram of work hydraulic system). It is composed of one hydraulic oil tank, one variable plunger pump,
one load sensing control valve and oil cylinders and pipelines of all work implements. The hydraulic oil
from the tank flows into the plunger pump, after passing through the priority valve, it flows into the control
valve by which controls telescoping of all cylinders so as to further control the loader work implement's
actions of tilting back and dumping of the bucket and raise, lowering and floating lowering of the boom.
Layout drawing of CLG835H_T4f work hydraulic system is as follows: refer to attached drawing in Chap-
ter 9 for schematic of hydraulic system
Layout drawing of work hydraulic system

4
1
2 3

6 7
5
8
9 10
P18H00009

1. Bucket cylinder 6. Control valve

2. Proportional pressure-reducing valve 7. Shuttle valve
3. Hydraulic oil tank 8. Pilot oil filter
4. Pilot valve 9. Pilot oil supply valve
5. Boom cylinder 10.Plunger pump
 4-19
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

1. When there is no action in the work hydraulic Hydraulic oil tank

system, i.e. boom reversing valve and bucket
reversing valve in the control valve are in Installation position and functional structure
neutral position, and variable plunger pump
is at minimum displacement position, the The hydraulic oil tank is side-sited type, which is
variable pump hardly has oil to output (only located on the rear frame in the middle of a
the minimum displacement required to keep machine, the right side of a cab. The main
self-running), oil passages of the control function is to store the hydraulic oil required for
valve connected to both of big and small cav- work cycle of the hydraulic system and
ities of the boom cylinder and bucket cylinder precipitate the pollutant of oil in hydraulic tank,
are sealed, and boom and bucket are kept in separate the air from oil and cool the hydraulic
original position. oil. A return oil filter has been set in the oil tank to
filter the pollutant in oil lines of the hydraulic
2. Operate the boom reversing valve controlled
system so as to guarantee the cleanliness of
by the pilot valve to lift, lower or float the
hydraulic oil. Structural diagram of hydraulic oil
boom and manipulate the bucket tilting
tank is as follows:
reversing valve controlled by the pilot valve to
tilt the bucket forward or backward. There is Structural diagram of hydraulic oil tank
an automatic leveling device of bucket
5
installed on bucket hydraulic cylinder. 1
3. Big and small cavities double-acting safety
valves are installed in oil lines of the control 6
valve connected with big and small cavities of
the bucket cylinder to protect the big and
small cavities of the bucket cylinder from
overload and fill oil and play the role of stabi-
lizing system work and protecting the rele-
vant elements of the system. 2
7
B: Technical parameters of work system ·

Items Parameters
System pressure 19±0.3Mpa\2755±43.5psi
3
System flow 210L/min@2200r/min
Pressure of overload 8
23±0.3MPa\3335±43.5psi
valve at A1 port
Pressure of overload
23±0.3MPa\3335±43.5psi 4
valve at B1 port
Pressure of overload P18H00010
23±0.3MPa\3335±43.5psi
valve at A2 port 1. Oil return chamber 5. Ventilated oil conduit
Pressure of overload and oil return filter 6. Oil filler, oil filter element and
23±0.3MPa\3335±43.5psi 2. Baffle breather
valve at B2 port
3. Washing port 7. Sight glass
Pressure of overload 4. Oil drain hole 8. Oil suction port
23±0.3MPa\3335±43.5psi
valve at A3 port
Pressure of overload
23±0.3MPa\3335±43.5psi
valve at B3 port
Pressure of main safety
21±0.3MPa\3045±43.5psi
valve
4-20
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

In which, the oil return chamber is used to Items Parameters Remarks

temporarily store the hydraulic oil that returns
from the system to effectively reduce the back- Anti-wear
Operating fluid 46#
flow velocity so as to avoid bubbles in the hydraulic oil
hydraulic oil tank resulted from too fast oil return.
Structure and working principle of plunger
The oil return filter mainly filters the oil returning
pump
to the hydraulic oil tank to prevent pollutant from
entering into the system through the oil tank to Same pump is used for the plunger pump of work
cause pollution. The baffle is used to form hydraulic system and that of steering hydraulic
isolation circulation for cold and hot oil in the oil system, that is, work hydraulic system and
tank to prevent oil shake from generating large steering hydraulic system share one pump. The
quantities of bubbles and isolate oil suction port plunger pump is located under cab and installed
from oil return port to ensure gas separates out on the right power take-off of the transmission
of hydraulic oil return. Washing port is used to and tightened it by stud and nut. It is driven by
clean the dirt in the oil tank. Oil drain hole is used engine via torque converter and transmission to
to drain fluid out of oil tank when replace oil or supply oil for work and steering hydraulic system.
clean oil tank. Oil suction port is used to supply
oil for hydraulic pump. The ventilated oil conduit Outline diagram and working principle of
is used for exhalation of a breather and to lead plunger pump:
the oil vapor exhaled by the breather to
underbody. Hydraulic oil is filled from the oil filler Schematic of working pump
after filtration by the oil filter vehicle. Oil filler filter
element is used to prevent large particles from
entering into oil tank when replacing and filling
hydraulic oil. The function of the breather is that it 4
sucks air from atmosphere to fill the air space
when the air pressure in oil tank is negative and
3
that exhaust extra air to realize the protection
function when the air pressure in oil tank is out of
limit. Oil level gauge is used to observe the oil
level of oil tank. Oil suction port is used to supply 5
oil for hydraulic pump. 2 6
Plunger pump
7
Main technical parameters
8
Items Parameters Remarks
1
Rated pressure 19Mpa\ 2755psi
Displacement 100ml/r\ 100cc/r
Direction of rotation Left rotation
P18H00011
Rated speed 2200rpm
Pressure of the shut- 1. Hydraulic oil tank 5. Flow compensation
20Mpa\ 2900psi 2. Swashplate valve
off valve 6. Pressure shut-off valve
3. Control valve (simpli-
Pressure of flow fied) 7. Variable cylinder
2.6Mpa\ 377psi 4. Load sensing port 8. Power control valve
compensator valve
 4-21
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

Exterior drawing of working pump 4. When the opening of the control valve 3
increases further, throttling effect fades, ΔP
1 decreases, flow compensator valve 5 moves
leftwards under the action of its spring force
PK, the big cavity of differential variable cylin-
2 der 7 returns oil gradually, the swashplate
turns clockwise and the displacement of
3 pump starts to increase. ΔP is also increased
with the increase of displacement (flow),
when flow of the system is stable, ΔP= PK =
4 fixed value, otherwise, balance of the flow
compensator valve 5 will be disturbed.
5. When the opening of the control valve 3
P18H00012
decreases, throttling effect becomes
1. Load sensing port 3. Housing return oil enhanced, ΔP increases, the flow compensa-
2. Oil outlet 4. Oil suction port tor valve 5 moves rightwards under the action
1. Before starting, the pressure of pump open- of ΔP, oil enters big cavity of variable cylinder
ing P=0, the pressure of load sensing port 4 7, the swashplate turns anticlockwise and the
PLS=0, the pressure difference between both displacement of pump is reduced to the mini-
ends of control valve 3 ΔP= P- PLS =0 and mum. When the system is stable, ΔP= PK =
the swashplate is in the maximum displace- fixed value.
ment position. 6. When the load pressure increases up to the
2. After starting, when the control valve 3 has setting pressure value of the system, the
no opening, PLS=0, the pressure P of pump pressure shut-off valve 6 opens the pump
opening acts on left end of flow compensator pressure oil way to the big cavity of variable
valve 5, the flow compensator valve 5 moves cylinder 7 so as to reduce the displacement
rightwards, oil enters big cavity of variable of the pump rapidly. As shown, the action of
cylinder 7, the swashplate turns anticlock- the pressure shut-off valve has the priority to
wise and the displacement of pump is the flow compensator valve 5, that is, it works
reduced to the minimum. The pressure P of as long as the pressure reaches the setting
the pump opening is generally set to 2.6Mpa\ value.
377psi at this time, i.e. the setting pressure of 7. From above, we can learn that the flow com-
the flow compensator valve 5, in order to pensator valve is in balanced state when the
improve the response speed of the system flow of the system is stable: ΔP= PK = fixed
and compensate a small amount of leak. value (without change). Therefore, the dis-
3. When the control valve 3 has an opening to placement of the pump is only related with
some extent, PLS occurs, ΔP starts to the opening of main control valve other than
decrease from the maximum value, the flow the load (i.e. pressure). This is the pump load
compensator valve 5 moves leftwards under sensing control.
the action of its spring force PK. The big cav- 8. When pressure of pump opening reaches
ity of differential variable cylinder 7 returns oil setting value, power control valve 8 moves
gradually, the swashplate turns clockwise rightwards, pressure oil at pump opening
and the displacement of pump starts to enters into big cavity of variable cylinder 7 via
increase. power control valve 8, swashplate turns anti-
clockwise and the displacement of pump
starts to decrease.
4-22
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

Boom cylinder Bucket cylinder

Main technical parameters Main technical parameters

Items Parameters Remarks Items Parameters Remarks

Cylinder bore (mm\in) 125\4.92 Cylinder bore (mm\in) 140\5.51
Rod diameter (mm\in) 80\3.15 Rod diameter (mm\in) 80\3.15
Stroke (mm\in) 728\28.66 Stroke (mm\in) 520\20.47
Minimum mounting Minimum mounting
1287\50.67 1110\43.70
distance (mm\in) distance (mm\in)

Structure and working principle of boom Structure and working principle of bucket
cylinder cylinder

The boom cylinder, which is installed at the The bucket cylinder, which is installed at the
articulated joint of boom cylinder on the front articulated joint of the front frame and bucket
frame and the articulated joint of boom cylinder, cylinder and the articulated joint of bucket lever
is the actuator of the work hydraulic system. It and cylinder, is the actuator of the work hydraulic
realizes the raise and lowering of the bucket system. It realizes the tilting forward and
through pushing the boom to move up and down backward of the bucket through the movement of
by piston rod telescoping actions of the boom oil bucket lever pushed by piston rod actions of the
cylinder. bucket cylinder.
Structure of boom cylinder Structure of bucket cylinder

1 2
P18H00013 2
1
P18H00014
1. Oil port of big cavity 2. Oil port of small cavity
1. Oil port of big cavity 2. Oil port of small cavity
 4-23
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

Control valve

Main technical parameters

Service
Items Parameters Remarks
conditions
Rated flow (L/min\ US gpm) 180\ 47.56 / /

Pressure loss under rated flow △ P (Mpa\psi) 2.5\ 362.5

Setting pressure of main safety valve (MPa\psi) 21\ 3045 / /
Pressure of safety valve of bucket cylinder small
23\ 3335 / /
cavity (Mpa\ psi)
Pressure of safety valve of bucket cylinder big cavity
23\ 3335 / /
(Mpa\ psi)
Operating fluid Anti-wear hydraulic oil HM46/HV46 /

Structure and working principle of control valve

3 5
1 7 2
4
10 6
11
9
8

15 14

12 13
P18H00015

1. Control valve oil return port 9. Boom lifting pilot port

2. Control valve oil inlet 10.Bucket tilting and retracting pilot port
3. Oil outlet of bucket big cavity 11.Bucket tilting and tipping pilot port
4. Oil outlet of boom big cavity 12.Oil outlet of multi-functional way big cavity
5. Control valve LS port 13.Oil outlet of multi-functional way small cavity
6. Oil outlet of boom small cavity 14.Oil outlet of multi-functional way small cavity
7. Oil outlet of bucket small cavity 15.Oil outlet of multi-functional way big cavity
8. Boom lowering pilot port
4-24
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

Exploded view of control valve

P18H00016
 4-25
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

Exploded view of control valve

P18H00017
4-26
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

Hydraulic schematic of control valve

P18H00018

1. Boom overload valve 5. Main safety valve 9. LS flow controller

2. Oil supplement valve 6. Bucket way 10.LS Relief valve
3. Bucket overload valve 7. Pressure compensation valve 11.Multi-functional way
4. Backpressure valve 8. Boom 12.Multi-functional union overload valve
 4-27
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

Installation position and working principle

The control valve is installed on the mounting board in front frame. The function of the control valve is to
control moving direction and speed of the bucket cylinder and the boom cylinder by changing the flowing
direction of oil so as to satisfy loader's working requirements under different work conditions.
Configuration: whole tandem closed neutral position slide valve;
Oil lines type: cascade and paralleling bucket tilting priority ;
Main components: bucket reversing valve, boom reversing valve, safety valve, pressure compensation
valve, LS relief valve, LS flow controller, etc.
The bucket reversing valve is a three-stack valve, which can control three actions of the bucket, i.e. to
tilting forward, backward and keeping.
The boom reversing valve is a four-stack valve, which can control four actions of the boom, i.e. raising,
keeping, lowering and floating lowering.
The safety valve controls the pressure of system. When the pressure of system exceeds the setting
value, oil will overflow to the oil tank to protect system from being damaged.
Pressure compensation valve, operated in multiple circuit, can guarantee that the flow of main valve can
not be changed by different loads so that the system has the performance of composite operation.
LS relief valve controls the pressure of LS oil line. When the LS pressure exceeds the setting value, oil
will overflow to the oil tank. The pressure of work system is the sum of setting pressure of LS relief valve
and the pump flow control valve in work hydraulic system.
LS flow controller can guarantee that the LS oil line has continuous flow and improve the response
speed of LS oil line.
Back pressure valve increases the oil return pressure at the time of bucket dumping and boom descend-
ing and improves the stability of bucket dumping and boom descending.
4-28
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

1. Neutral position of control valve

When the control valve is in neutral position, bucket valve rod 6 and boom union valve rod 8 are in neu-
tral position. As for the closed neutral position structure, LS pressure is zero, the variable pump under
the action of pump outlet pressure is in minimum displacement and the pump is in low-pressure standby
state.

P18H00019

As for the closed neutral position structure of valve rod, oil line between big & small cavities of cylinder
and valve rod is kept closed, the pressure of control valve oil inlet, which is the same as that of pump
outlet, is in low-pressure state.
 4-29
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

2. Bucket dump

P18H00021

When the control level is shifted to the tilting back position, the pilot pressure oil from the pilot valve acts
on the pilot oil port at b1 end of the bucket tilting union, the bucket tilting union valve rod 6, which works
in right position, moves leftwards, the pressure oil from P port returns to the bucket tilting union reversing
valve rod via the orifice of bucket tilting union valve rod 6 and the pressure compensation valve 7, after
reversing, the pressure oil enters into big cavity of the bucket tilting cylinder, meanwhile, LS oil line from
the pressure compensation valve 7 acts (via shuttle valve) on flow control valve of variable pump and
controls the displacement of the pump. Oil from small cavity of bucket tilting cylinder is connected with oil
return port T of the control valve via bucket tilting union valve rod 6, bucket tilting cylinder piston rod
extends to realize the bucket tilt back.
4-30
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

3. Bucket tilt back

P18H0037

When the control level is shifted to the tilting back position, the pilot pressure oil from the pilot valve acts
on the pilot oil port at b1 end of the bucket tilting union, the bucket tilting union valve rod 6, which works
in right position, moves leftwards, the pressure oil from P port returns to the bucket tilting union reversing
valve rod via the orifice of bucket tilting union valve rod 6 and the pressure compensation valve 7, after
reversing, the pressure oil enters into big cavity of the bucket tilting cylinder, meanwhile, LS oil line from
the pressure compensat.
 4-31
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

4. Boom raise

P18H00022

When the control level is shifted to the lifting position, the pilot pressure oil from the pilot valve acts on
the pilot oil port at b2 end of the boom union, the boom union valve rod 8, which works in right position,
moves leftwards, the pressure oil from P port returns to the boom union reversing valve rod via the orifice
of boom union valve rod 8 and the pressure compensation valve 7, after reversing, the pressure oil
enters into big cavity of the boom cylinder, meanwhile, LS oil line from the pressure compensation valve
7 acts (via shuttle valve) on flow control valve of variable pump and controls the displacement of the
pump. Oil from small cavity of boom cylinder is connected with oil return port T of the control valve via
boom union valve rod 8, boom cylinder piston rod extends to realize boom rise.
4-32
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

5. Boom lowering

P18H00023

When the control level is shifted to the descending position, the pilot pressure oil from the pilot valve acts
on the pilot oil port at a2 end of the boom union, the boom union valve rod 8, which works in left position
(descending position), moves rightwards, the pressure oil from P port returns to the boom union revers-
ing valve rod via the orifice of boom union valve rod 8 and the pressure compensation valve 7, after
reversing, the pressure oil enters into small cavity of the boom cylinder, meanwhile, LS oil line from the
pressure compensation valve 7 acts (via shuttle valve) on flow control valve of variable pump and con-
trols the displacement of the pump. Oil from big cavity of boom cylinder is connected with oil return port
T of the control valve via boom union valve rod 8 and back pressure valve 4, boom cylinder piston rod
retracts to realize the descending of the boom.
 4-33
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

6. Floating descending position of boom union

P18H00024

When the control lever is shifted to floating lowering position (the lever is pushed to front end), the pilot
pressure oil acts on a2 end of the boom 8, as the pilot pressure in floating lowering position is high than
that of boom lowering position, the boom valve rod 8 works in leftmost position (floating position), at this
time, the pressure oil (not via the pressure compensation valve 7) from P port is directly connected with
A2 & B2 port of the big & small cavity of the boom and the oil return port T of the control valve, the bucket
descends rapidly under the effect of its dead weight to realize the floating lowering. At this time, the pres-
sure of load sensitive oil line is zero, that is, the pump, in low pressure standby state, hardly supplies oil
for the system. The rapid descending of the boom results in negative pressure in small cavity of the
boom. The boom descending oil refilling valve is opened to reduce the negative pressure of small cavity.
4-34
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

7. Compound action position

When the control lever is in compound action position and non-load sensitive control valve conducts the
distribution of oil flow in the bucket and boom, most oil flows to the oil line with low load, oil in the oil line
with high load moves slowly or even stops moving, resulting in defects of machine function and low pro-
duction efficiency. The control valve adopts pressure compensation behind valve, that is, place the pres-
sure compensation valve behind the boom and bucket, the different loads of two unions at the time of
compensating the compound action make flow through the union have nothing to do with its load, flows
in two unions are distributed proportionately to realize the compound action of the complete machine.
Take the raise and tilting back actions at the same time as an example in the following figure for explana-
tion.

P18H00025
 4-35
January 24, 2017 Structure Function Principle
CLG835H Work hydraulic system

If load of boom is higher than that of bucket, the groups, which are respectively used for raise,
signal of high load pressure, detected from the lowering and floating lowering of the boom. The
pressure compensation valve 7, acts on its left bucket tilting operating way includes two
side of spool to make 7 works in the left position, metering valve groups, which are respectively
high load signal leads to reduction of the used for bucket tilting back and dumping of the
compensation valve 7 opening and improvement bucket. Multi-functional operating way includes
of the throttling effect so that the pressure behind two metering valve groups, which can be used to
orifice of the bucket valve rod (i.e. in front of realize actions of multi-functional cylinder, for
pressure compensation valve 7) is equal to that example, quick coupler, grapple device and other
of the boom union, meanwhile, as the pressure attachments. With controlling the handle of pilot
in front of unions valve rod is same (the pressure operating valve, the action of each valve group in
difference in front of unions valve rod is the same boom operating way, bucket operating way and
as that behind), flow of unions is only in relation multi-functional way can be controlled. In
to the valve rod opening other than their loads. addition, in all metering valves, the displacement
of the spool is in proportional relation with the
8. Multi-functional way
operating angle displacement of the handle. The
The multi-functional way is generally used for larger the operating angle of the handle is, the
realizing actions of quick coupler cylinder, fork faster the action speed of the work implement is.
cylinder, side dump cylinder and other multi- Schematic diagram and outline diagram of pilot
functional attachments. Its principle is the same valve are as follows:
as that of the bucket. Schematic diagram of pilot valve

Pilot valve

Main technical parameters

Service
Items Parameters Remarks
conditions
Working
3.5\507.5 / /
pressure (MPa)
Maximum
5.0\725 / /
pressure (MPa)
P18H00026
Flow (L/min) 16\4.23 / /
Anti-wear
Operating fluid HM46/HV46 /
hydraulic oil

Structure and working principle of pilot valve

The pilot valve shall be installed on the handrail

assembly in the cab and its position can be
adjusted forwards and backwards with the
handrail assembly. The standard configuration of
the model is triplex pilot valve (boom and bucket
way are hydraulically controlled and multi-
functional way is electrically controlled), which
consists of boom operating way, bucket
operating way and multi-functional way. The
boom operating way includes two metering valve
4-36
Structure Function Principle January 24, 2017
Work hydraulic system CLG835H

Outline diagram of pilot valve

P18H00027
 4-37
January 24, 2017 Structure Function Principle
CLG835H Steering hydraulic system

Steering hydraulic system

Overview-components and position

Steering hydraulic system is used to control the vehicle traveling direction, for this configuration, the
steering hydraulic system is a variable load sensing hydraulic system, which is mainly composed of vari-
able plunger pump, shuttle valve, priority valve, metering pump, steering cylinder and other pipeline
accessories. This system can realize steering priority function.
Steering priority refers that oil from the plunger pump will be supplied to steering system with priority and
the surplus oil will be supplied to the work hydraulic system, which is realized by the priority valve. Prior-
ity valve, actually a floating spool, adjusts the flow of oil supply to steering system through sensing the
load pressure of the steering system. The oil flow supplied to the steering system will adapt to the steer-
ing load and velocity.
4-38
Structure Function Principle January 24, 2017
Steering hydraulic system CLG835H

Schematic diagram of CLG835H-T4f steering hydraulic system and layout drawing of component are as
follows:

P18H00028
 4-39
January 24, 2017 Structure Function Principle
CLG835H Steering hydraulic system

Component layout

1 2 4
3

P18H00029

1. Steering cylinder 3. Priority valve

2. Metering pump 4. Plunger pump

B:Overview - technical parameters of steering system

Items Parameters
System pressure 18±0.3MPa\2610±43.5psi
System flow 220L/min@2200r/min\58.1US gpm@2200rpm
Pressure of overload valve at port A 24±0.3MPa@40±2L/min\3480±43.5psi@10.57±0.53US gpm
Pressure of overload valve at port B 24±0.3MPa@40±2L/min\3480±43.5psi@10.57±0.53US gpm
Pressure of main safety valve 23±0.3MPa@20±2L/min\3335±43.5psi@5.28±0.53US gpm
Steering angle 40°
4-40
Structure Function Principle January 24, 2017
Steering hydraulic system CLG835H

Steering pump Overall structure diagram of metering pump

Same pump is used for the plunger pump of work

hydraulic system, that is, work hydraulic system
and steering hydraulic system share one pump. 1

Metering pump
2
Main technical parameters
3
Items Parameters Remarks
Rated displace-
739ml/r\739cc/r 4
ment
Amplification
1.6
ratio 5
Max pressure of 24.1MPa\3494.5
the system psi
Max back
1Mpa\psi
pressure
Contamination
degree of
ISO18/13
recommended
hydraulic oil
P18H00031
Anti-wear
Operating fluid HM46/HV46
hydraulic oil 1. T port 3. L port 5. R port
2. P port 4. LS port
Structure and working principle of
components Working principle:

Metering pump is located above hinge joint and Metering pump is used to control the steering
installed on bottom plate of steering column of cylinder to realize left-right turning.
cab. 1) When the steering wheel is not turned,
Schematic of metering pump metering pump is in neutral position, LS port
is connected with T port, and L, R ports are
cut off.
2) When turning steering wheel to right (left),
pressure oil of P port will be connected with
R (L) port to control the action of steering
cylinder to realize right (left) steering.
3) The pressure oil of LS port is fed back to LS
port of variable pump.

P18H00030
 4-41
January 24, 2017 Structure Function Principle
CLG835H Steering hydraulic system

a. For power steering, pressure oil flows into stator and rotor pair in certain proportion (flow amplify-
ing function) through spool and valve bushing pair to push rotor to rotate with steering wheel and
oil from plunger pump flows into left cavity or right cavity of steering cylinder to realize steering.
b. For manual steering, the stator and rotor pair of metering pump will play the role of oil pump to
press the oil in one cavity of steering cylinder to another cavity. Oil cylinder piston rod will push the
wheel to realize steering. Manual steering has low steering torque.

Installation and troubleshooting of metering pump

When installing, make sure that metering pump is concentric with steering column and there shall be
clearance in axial direction to avoid jacking of spool. Check whether turning is flexible after installation.

Fault and troubleshooting:

Troubleshooting
Faults Symptom Cause
methods
Check the joint surface
Oil leakage in joint surface of parts Dirt in joint surface
and clean it up
Oil leakage Oil leakage at front cover Shaft seal ring is damaged Replace the seal ring
Insufficient tightening torque
Oil leakage in bolt (plug) Tighten bolt (plug)
of bolt (plug)
Steering wheel is heavy when Check the oil pump and oil
Oil supply is insufficient
turned quickly supply line
Check whether the main
Steering wheel is light when turned Main priority valve spool is
priority valve spool is flexi-
slowly stuck
ble
Cylinder crawling
Bleed air in the system
Foam in oil Air in steering system and check oil pump inlet
Heavy steering for air leakage
Irregular noise
Check whether the steel
Heavy steering, no steering cylinder Manual steering check valve
ball exists and whether it is
action failure
chocked
Leakage caused by chocked Clean and check the
No-load steering is light, heavy load
safety valve or safety valve safety valve in priority
steering is heavy
spring failure valve
Heavy steering High hydraulic oil viscosity
No steering back to neutral position Leaf spring failure Replace leaf spring
Pull pin bend or broken
Pressure oscillation is significantly Replace the pull pin or
Rupture at linkage shaft pin
increased, even no steering linkage shaft
slot
Steering failure When you turn the steering wheel, it
Incorrect mutual alignment of
immediately rotates in the opposite Reassembly
linkage shaft and rotor
direction or swings from side to side
Priority valve seizure, no oil at
No turning
CF port, LS port blocked
4-42
Structure Function Principle January 24, 2017
Steering hydraulic system CLG835H

Troubleshooting
Faults Symptom Cause
methods
Steering column axially abuts
the spool to the bottom
When the pressure drop in the neu- High resistance of steering
No automatic return
tral position increases and steering column Troubleshooting in accor-
to the neutral posi-
wheel stops turning, the metering dance with specific condi-
tion of steering Leaf spring break
pump is not unloaded (vehicle off tions
wheel
tracking occurs) The installation of steering
column is not concentric to
that of spool
No steering of steering cylinder to
No steering to the Increase the pressure of
the extreme position, steering is Low pressure of safety valve
extreme position safety valve properly
heavy as reflected
During power steering, the cylinder
piston moves to the extreme posi-
tion, the driver does not have obvi- Large radial or axial clearance Replace the stator and
No manual steering
ous feel of end point; during manual of stator and rotor pair rotor pair
steering, the steering wheel rotates
but the cylinder is still

Priority valve

Main technical parameters

Items Parameters Service conditions Remarks

Flux 240L/min\63.4US gpm
Pressure of safety valve 18MPa\2610psi
Operating fluid Anti-wear hydraulic oil HM46/HV46
 4-43
January 24, 2017 Structure Function Principle
CLG835H Steering hydraulic system

Structure and working principle of components

The priority valve is installed on the inner side of left web plate of rear frame and close to hinge position.
Hydraulic oil from the plunger pump enters into metering pump via priority valve and then flows into
steering cylinder to realize left-right turning. The priority valve realizes the steering priority function.
Schematic of priority valve

P18H00032

Working principle: during single steering, P port of metering pump communicates with L (or R) port, the
channel from LS to T is closed and the channel from LS to L (or R) is open. LS oil pressure acts on left
side of priority valve spool so that the spool moves rightwards, the opening of CF channel increases and
the opening of EF channel decreases. This is steering priority.
Outline diagram of priority valve

P18H00033
4-44
Structure Function Principle January 24, 2017
Steering hydraulic system CLG835H

Exploded view of priority valve

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18

P18H00034

1. Screwed plug 7. O-seal ring 13.Spring

2. Adjusting plug 8. Pressure ring 14.Orifice screwed plug
3. Spring 9. Strainer 15.Spool
4. Guide holder 10.Conversion connector 16.Orifice screwed plug
5. Valve seat 11.O-seal ring 17.O-seal ring
6. Guide 12.Valve body 18.Screw plug
 4-45
January 24, 2017 Structure Function Principle
CLG835H Steering hydraulic system

Steering cylinder

Main technical parameters

Items Parameters Remarks

Cylinder bore (mm\in) 80\ 3.15
Rod diameter (mm\in) 45\ 1.77
Stroke (mm\in) 420\ 16.54
Maximum mounting distance (mm\in) 1148\ 45.2
Minimum mounting distance (mm\in) 728\ 28.66

Structure and working principle of steering cylinder

Steering cylinder, which is installed at the articulated joint of front & rear frame and cylinder, is the actua-
tor of steering hydraulic system. It realizes the left-right steering by pushing the front and rear frame of
left-right steering cylinder piston rod.
Structure of steering cylinder
Overall structure diagram of steering cylinder

1 3
2 P18H00035

1. Oil port of big cavity 2. Pressure measuring plug 3. Oil port of small cavity
4-46
Structure Function Principle January 24, 2017
Brake system CLG835H

Brake system

A: Overview-components and position

Brake system consists of service brake system,

emergency & parking brake system. Service
brake system is used in speed control and
parking in general traveling. Emergency &
parking brake system is used for brake after
parking, or emergency brake in case of service
brake system failure.
Service brake system consists of brake pump,
brake valve, charge valve, accumulator, wet
brake (in the axle), pressure switch and pipeline.
Emergency & parking brake system consists of
parking brake accumulator, brake cylinder, brake
valve block and pipeline.
This is a full-hydraulic brake system and its
features are as follows:
1. Using wet-type wheel brake: the system cir-
cuit is fully closed so as to avoid the influence
of external uncertain factors (for example:
sand invasion and oily friction disc) on brak-
ing performance. Using oil-immersed cooling
method by which the friction plate is
immersed in oil to avoid reduction of braking
performance caused by heat fading of friction
material due to high temperature of friction
plate, at the same time, to reduce the
requirement for brake oil.
2. Using full-hydraulic brake system: cancel air
line and simplify the system so as to avoid
the corrosion of pipeline and brake compo-
nents caused by water in the air line system,
and the reliability and response speed of the
system are improved.
3. Using dual-circuit brake: front and rear axle
brake lines are independent so as to make
them safer and more reliable
Component layout drawing of full-hydraulic brake
system CLG835H_T4f is as follows: refer to
attached drawing in Chapter 9 for schematic of
braking
 4-47
January 24, 2017 Structure Function Principle
CLG835H Brake system

Layout of full-hydraulic brake system component

1 2

3 7

5 6

P18H00036

1. Brake valve 4. Charge valve 6. Accumulator assembly

2. Brake pump 5. Brake valve assembly 7. Brake cylinder
3. High-pressure oil filter
4-48
Structure Function Principle January 24, 2017
Brake system CLG835H

Overview - technical parameters of brake When applying the parking brake, emergency &
system parking brake system controls the brake valve
block assembly using the parking brake solenoid
Items Parameters valve switch in the cab to make the parking brake
accumulator release pressure oil which controls
Dual-circuit full-hydraulic wet
Service brake system the brake cylinder to realize emergency &
brake
parking brake function. In addition, the pressure
Electronically controlled full
Parking brake system
hydraulic brake
control switch in electrical system can also
realize the complete machine brake.
Pressure of brake
18±0.5MPa\2610±72.5psi
pump relief valve Power cut-off function (i.e. function of brake and
Output pressure of spontaneous out-of-gear): when the shift control
6±0.4MPa\870±58psi
brake valve lever is in forward or backward I & II position and
30L/min@2200r/min\7.93US the clutch on/off switch is closed (i.e. push button
System flow lamp is on) during driving, once apply the foot
gpm@2200rpm
brake, electric control box sends a command to
Overview - working principle of brake system the shift control valve to engage the transmission
in N position and cut off power. When the shift
Working principle of full-hydraulic brake: the control lever is in forward or backward I & II
system pressure is kept by accumulator position and the clutch on/off switch is
assembly and each brake circuit is equipped with disconnected (i.e. push button lamp is off) during
accumulator independently. When oil pressure in driving, once the brake is applied, the power will
the accumulator is lower than the setting not be cut off.
minimum working pressure of the system (the
Clutch on/off switch is a switch with self-locking
pressure for CLG835H_T4f is \1957.5psi), the
function, refer to the electrical system in the
charge valve feeds the pressure oil of brake
manual for detail of using method.
pump (CLG835H_T4f brake pump and cooling
pump form tandem pump and share one pump The "function of brake and spontaneous out-of-
body) filtered and outputted by oil filter into the gear" can work only in forward or backward I & II
accumulator. When oil pressure in the position. In order to guarantee safe driving, when
accumulator reaches the setting maximum load is in high-speed position, once the brake is
working pressure (the pressure for applied, the electric control box will not sends the
CLG835H_T4f is 16MPa\2320psi), the charge command of cutting off power no matter whether
valve stops supplying oil for the accumulator of the clutch on/off switch is closed or
brake system. The brake pump is unloaded by disconnected, which is determined by driving
connecting S port of charge valve with oil tank. At properties of the loader.
the time of braking, depress the brake valve Emergency brake button and clutch on/off switch
pedal, high pressure oil stored in the
accumulator of service brake circuit enters into
the axle via the service brake valve so as to push
the brake piston in the axle, the piston compacts 2
the wet-type friction plate and half shaft of wet-
1
type brake axle to realize the service brake of the
complete machine. After releasing the brake
pedal and removing brake, oil in the axle returns
to oil tank via the brake valve. P18H00037

1. Emergency Brake Button

2. Clutch on/off sw
 4-49
January 24, 2017 Structure Function Principle
CLG835H Brake system

locked. During operation, if the parking &

emergency brake circuit is faulty, resulting in oil
pressure in the accumulator BR3 lower than
When the shift control lever is in forward or 11MPa\1595psi, the emergency brake low
backward I & II position during driving, do not pressure alarm light flashes. At this time, stop
disconnect the clutch on/off switch eas- operation and park the vehicle for inspection.
ily,otherwise, the brake and power train sys- During inspection, stop the machine on level
tem may be damaged. When the machine is ground, pull the emergency brake button and
in operation at the upslope or downslope of chock the wheels with blocks to prevent the
rough road and the brake is applied, the func- machine from moving.
tion can be selected in order to ensure safe If the service brake low pressure alarm fails and
driving. the system is faulty, which results in oil pressure
At short time of starting the machine, the service in the accumulator of service brake circuit lower
brake low pressure alarm light flashes and the than 7MPa\1015psi, the clutch on/off switch of
alarm buzzer sounds. Because oil pressure in emergency brake in the system cuts off the
the accumulator of service brake circuit is still power automatically to engage the transmission
lower than the alarm pressure (11MPa\1595psi) in N position. Simultaneously, the solenoid valve
at this time, and the alarm will stop automatically is powered off, hydraulic oil in the parking brake
as pressure in the accumulator is higher than the cylinder flows back to oil tank via emergency
alarm pressure. Press down the emergency brake solenoid valve so that the parking brake is
brake button only after the alarm stops. During locked and the emergency parking of loader is
operation, if the system is faulty, resulting in oil achieved.
pressure in the accumulator of service brake
circuit lower than 11MPa\1595psi, the service
brake low pressure alarm light flashes and the
alarm buzzer sounds. At this time, stop operation Unless in emergency, do not apply parking &
and park the vehicle for inspection. During emergency brake when the machine is run-
inspection, stop the machine on level ground and ning. Applying parking & emergency brake in
pull the emergency brake button. normal operation will cause serious damage
When press down the emergency brake button, to the brake and power train system.
the solenoid valve is powered on, valve port is
open, the pressure of oil outlet is
16MPa\2320psi, high pressure stored in the
accumulator of parking & emergency brake
circuit enters into parking brake cylinder via
emergency brake solenoid valve to release the
parking brake. At the moment of pressing down
the emergency brake button, the parking &
emergency brake low pressure alarm light
flashes. Because oil pressure in the parking
brake circuit is still lower than the alarm pressure
(11MPa\ 1595psi) at this time. The machine can
be started only when the emergency brake low
pressure alarm light is off. When pull the
emergency brake button, the solenoid valve is
powered off, hydraulic oil in the parking brake
cylinder flows back to oil tank via emergency
brake solenoid valve and the parking brake is
4-50
Structure Function Principle January 24, 2017
Brake system CLG835H

Brake pump The gear pump works by using the meshing

movement of a pair of gears and causing volume
Main technical parameters changes in the suction and discharge chambers.
It is the suction port with a closed volume always
Service in a growing state, and it is the outlet with a
Items Parameters
conditions closed volume always in an ever-reduced state.
Theoretical Generally, the side with larger port is the suction
displacement (ml/r\cc/ 15\2175 / port, and the side with smaller port is the outlet.
r)
Overall structure of brake pump
Rated speed (r/min) 2200 /
Schematic diagram of brake pump
Maximum speed (r/
2500 /
min) 1
Rated pressure
18\2610 /
(Mpa\psi)
Maximum
25\3625
pressure(Mpa\psi)
Volume efficiency 0.92 /
Anti-wear HM46/
Operating fluid
hydraulic oil HV46
Direction of rotation Left rotation / 2 3 P18H00039

Structure and working principle of brake 1. Oil outlet (for oil entering into high-pressure oil filter)
2. Safety valve of brake system
pump 3. Oil inlet (to oil outlet steel tube of tank)

The brake pump is a gear pump and located

under cab and installed on the left power take-off
of the gearbox and tightened by stud and nut. It
is driven by engine via hydraulic torque converter
and gearbox to supply oil for brake hydraulic
system.
Gear pump working principle schematic

P18H00038
 4-51
January 24, 2017 Structure Function Principle
CLG835H Brake system

EXploded view of brake pump (cooling pump and brake pump form tandem pump)

19
18
17
1

13
14
16 9
15
12
24
8
2
11 25

23
20
22 27
21 28
10 3
4
6

5
7

P18H00040

1. Front housing 11.Internal circlip 21.Seal ring of side plate

2. Pump body 12.Outboard ball bearing 22.Seal ring of side plate
3. Pump body 13.Skeleton oil seal 23.Stud bolt
4. Drive gear 14.Washer 24.Nut
5. Drive gear 15.Snap ring 25.Washer
6. Driven gear 16.Snap ring 26.Relief valve
7. Driven gear 17.Roller bearing 27.Plug
8. Connecting shaft 18.Oil blocking screw 28.Washer
9. Connecting shaft 19.Cylindrical pin
10.Lateral plate 20.O-ring
4-52
Structure Function Principle January 24, 2017
Brake system CLG835H

Internal maintenance instructions of brake pump

1. Maintenance of brake pump: brake pump is the power source of brake hydraulic system, and its vol-
ume efficiency will influence the speed and efficiency of actuator directly. It is not recommended to
remove or install the brake pump by non-professionals as it is a precise hydraulic element, and the
broken pump shall be returned to the manufacturer and repaired by professionals; after repair, brake
pump shall perform the test of airtightness and volume efficiency in order to guarantee its perfor-
mance and normal application.
2. Installation requirements for brake pump:
(1) You shall understand fully about rotating direction of brake pump and its compliance with the require-
ments of the entire machine before installation of the brake pump.
(2) Inlet and outlet port of brake pump shall be kept clean without dirts, and its surface shall have no inju-
ries so as to guarantee the sealing effect of O-ring.
(3) Before assembling the brake pump, check whether the mounting hole depth of gearbox spline is
larger than the pump's shaft extension length or not, in order to prevent from culmination phenome-
non, pump burnt out. Installation of spline shaft and spline housing shall be free without stuck.
3. Precautions for maintenance of brake pump:
(1) Apply a moderate force during assembly and disassembly of brake pump, and rude operation is not
allowed; user shall not open the brake pump without manufacturer's consent, otherwise they cannot
guarantee their product performance.
(2) Pay attention to maintenance of brake pump during operation, replace the hydraulic oil and check all
bolts at connections for looseness according to the maintenance manual.
(3) Oil inlet and outlet of brake pump shall be installed firmly and sealing device shall be secured, other-
wise it may cause oil leakage or air suction and affect the pump's performance.
(4) It is not allowed to operate the brake pump under maximum pressure, maximum speed or over-
loaded circumstances, otherwise, it may influence the service life.
(5) Oil temperature is required to be kept lower than 80 °C/176°F, otherwise it may affect the viscosity of
hydraulic oil and also accelerate the oxidation of fluid.
 4-53
January 24, 2017 Structure Function Principle
CLG835H Brake system

4. Troubleshooting for brake pump

Fault phenomenon of
Possible cause Handling method
oil pump
Air enters the system Tighten all joints
Oil supply is insufficient Refill the oil to a proper level
Oil is cold Operating in a low speed
Oil suction tube is blocked Remove the blocking object
Oil pump is noisy Air filter in tank is blocked Clean or replace the air filter
Bad right alignment between pump and
Check
input shaft
Resonance is serious (resonance of pump
Check if mounting bolts of pipeline and com-
with peripheral components of oil tank and
ponents are tightened
pipeline)
Oil supply is insufficient Refill the oil to a proper level

Pump is slow at response Setting pressure of relief valve is insufficient Readjust the pressure of relief valve
or has no response Pump is worn or broken Repair or replace
Valve is worn or stuck or leaks Repair or replace
Adjust the pressure or replace the relief
Setting pressure of relief valve is too low
valve
Low viscosity of fluid Replace with recommended hydraulic oil
Oil temperature rises Oil is dirty Replace the hydraulic oil
Low oil level Refill hydraulic oil properly
Pump is worn or broken Repair or replace
Air enters the system through oil suction
Tighten all joints
tube
Oil foaming Low oil level Refill hydraulic oil properly
Lip type seal ring (oil seal)of main revolving Replace the lip type seal ring (oil seal)of
shaft is worn or damaged main revolving shaft
Side plate is broken Replace side plate
The flow or pressure of
Relief valve fails Replace relief valve
pump is insufficient
Air enters the system Tighten all joints

Oil still leaks after replac- Worn lip type seal ring (oil seal) of revolving
ing the lip type seal (oil shaft causes damage to the sealing area of Replace the drive gear shaft
seal)of main revolving drive gear shaft
shaft Seal ring is worn or damaged Replace the seal ring
4-54
Structure Function Principle January 24, 2017
Brake system CLG835H

Brake valve Structure and working principle of brake

valve
Main technical parameters
Brake valve (also called foot brake valve) is
Service located on left floor of cab and its pedal can be
Items Parameters controlled by left foot. Brake valve, which
conditions
realizes the sensitive follow-up control during the
Maximum
allowed system 21MPa\ 3045psi \
brake and release process of service brake
pressure system, is one of the main parts of brake system.
Maximum brake 6±0.4MPa\ Outline diagram of brake valve
\
pressure 870±58psi
Pedal force
under maximum 170N\ 38.22lbf \
pressure (about)
Pedal stroke
20° \
(about)
Operating fluid Anti-wear hydraulic oil HM46/HV46

As the structure of dual-circuit brake valve is

complex and the requirement for assembly
and adjustment is high, the removal & instal-
lation and adjustment can not be conducted
by non-professionals without authorization.
Before the dual-circuit brake valve is deliv-
ered, its pressure value has been adjusted. If
fault occurs or the maximum brake pressure
value is wrong, please contact its factory or
dealer.

P18H00041
 4-55
January 24, 2017 Structure Function Principle
CLG835H Brake system

Structure of brake valve

P18H00042

1. Spring 9. X-ring
2. Valve body 10.Y-ring
3. Lower spool 11.Reset spring
4. Valve body 12.Adjusting shim
5. Upper spool 13.Balance spring
6. Steel ball 14.Piston
7. Spring holder 15.Roller
8. Balance spring 16.Step
4-56
Structure Function Principle January 24, 2017
Brake system CLG835H

Under brake, output oil pressure of brake valve is

Hydraulic schematic of brake valve proportional to brake pedal travel and force
applied on the brake pedal. When the brake
pedal is under static state (high-mounted
position), the output pressure (F1 port and F2
port) is zero and the brake valve cavity is
connected to oil tank (F1 and F2 are connected
to T). When the brake is depressed, output
pressure (F1 and F2) increases in proportional
relation with angular displacement of brake
pedal. When the brake pedal is depressed
completely, output pressure (F1 port and F2 port)
P18H00043 is limited to presetting pressure of valve and is
not related with oil supply pressure.
Main structure of brake valve is as shown in the
Figure above , P1 port and P2 port are Precautions for use and maintenance of
connected with accumulator BR1&BR2 brake valve
respectively, F1 port and F2 port are connected
with wheel brake of front and rear axle. 1. Be sure the connecting pipeline is clean,
without any impurities;
1) When the brake valve pedal is released, P1
port and P2 port are disconnected with F1 2. Periodically check the connection and fasten-
port and F2 port respectively, F1 port and F2 ing condition of all parts and tighten timely if
port are connected with T port and thus the there is looseness;
machine is under non-brake state. 3. Periodically check the working condition of
2) With the brake valve pedal depressed, F1 pedal: whether it is stuck when depressing
port and F2 port is disconnected with T port, the pedal and whether it can return rapidly at
and then P1 port is connected with A1 port, the time release;
P2 port is connected with A2 port, high pres- 4. If it is necessary to remove and clean brake
sure oil stored in accumulator BR1 & BR2 valve, do not clean seal ring, valve and other
enters into the wheel brake of front and rear rubber parts using brake fluid, kerosene and
axle to apply brake, at the same time, the other fluids which can corrode the rubber
brake switch acts and the brake light is on. parts, they can only be wiped by blowing or
Two circuits of dual-circuit are independent clean cloth. Apply 3# lithium lubricating
from each other, as one brake circuit is grease on the moving parts, such as valve
faulty, the other circuit can still work nor- and piston after being cleaned;
mally.
 4-57
January 24, 2017 Structure Function Principle
CLG835H Brake system

Charge valve

Main technical parameters

Service
Items Parameters
conditions As the structure of dual-circuit charge valve
Shut-off pressure 16+0.5/-1 Mpa\ is complex and the requirement for assembly
\
of charge valve 2320+72.5/-145psi and adjustment is high, the removal & instal-
Connecting pres- lation and adjustment can not be conducted
13.5±1MPa\
sure of charge
1957.5±145psi
\ by non-professionals without authorization.
valve Before the dual-circuit charge valve is deliv-
Charging speed 8L/min\ 2.1US gpm \ ered, its pressure value has been adjusted. If
Anti-wear hydraulic HM46/
fault occurs or charging pressure value is
Operating fluid wrong, please contact its factory or dealer.
oil HV46

Structure and working principle of charge valve

Charge valve, located in left housing of rear frame, is used to charge the accumulator according to the
pressure of brake system.
Structure diagram of charge valve

P18H00044

9640-charge valve (KIT SAFETY ISOLATED VALVE) 9540-spool (KIT EQ DIVIDER SPOOL) 5425–
spring (SPRING)
5505-O-ring(O’RING)5470-plug(METAL PLUG)
4-58
Structure Function Principle January 24, 2017
Brake system CLG835H

When the pressure of working oil port B3 of

Hydraulic schematic of charge valve charge valve is lower than connecting pressure
of charge valve (13.5±1MPa\1957.5±145psi), the
connecting/shut-off spool 3 works in upper
1 position and closes T port, the priority valve 1
4 works in right position; oil (via priority valve 1 and
check valve 2) from the pump is supplied for the
accumulator which reduces the pressure at B3
2 port. When the pressure of B3 port of charge
3 valve is higher than connecting pressure of
charge valve (16+0.5/-1 Mpa\2320+72.5/-
145psi), the connecting/shut-off spool 3 works in
lower position, oil from spring cavity of priority
valve 1 is connected with T port via connecting/
shut-off spool 3, the priority valve 1 works in left
position; all oil from the pump returns to oil tank
via S port. Recharge the accumulator as the
pressure of accumulator is lower than that of
P18H00045
connecting pressure of charge valve.
1. Priority valve (main 3. Connecting/shut-off Oil line diagram in charging state:
spool) spool
2. Check valve 4. Shuttle valve

The priority valve 1 is used to supply oil for brake

system preferentially and unload after meeting
requirements for the accumulator of brake
system; the connecting/shut-off spool 3 is used
for setting the pressure for connecting and
shutting off charge valve; The shuttle valve 4 is
used to protect brake circuit A1 & A2 from
interference with each other.
Hydraulic schematic of charge valve is shown in
the above Figure. P port is connected with pump,
A1 & A2 ports are connected with the
accumulator for service brake, B3 port is
connected with P port of brake valve block, and
then connected with parking brake accumulator,
T port is connected to oil tank and S port is
connected to oil tank.
P18H00046
 4-59
January 24, 2017 Structure Function Principle
CLG835H Brake system

Accumulator assembly
Oil line diagram in bypass state:
The accumulator assembly, which is located in
the housing at left side of complete machine and
is fixed on rear frame, mainly consists of service
brake accumulator and parking brake
accumulator, and the service brake accumulator
BR1 (front axle), service brake accumulator BR2
(rear axle) and parking brake accumulator BR3
are installed as shown in figure. Installation
diagram is as follows:
Installation diagram of accumulator

BR3 BR1

P18H00047

Shuttle valve is used to guarantee two brake

circuits are not in interference with each BR2
P18H00048
other. When one of circuits fails and the pres-
sure decreases, the circuit is closed under
spring force. Make sure that the brake circuit
with zero-failure still realize braking function.
At this time, the failed circuit is connected
with the charge valve, the pressure of B3 port
decreases, low pressure alarm switch of ser-
vice brake acts, the machine shall be stopped
immediately for inspection.
4-60
Structure Function Principle January 24, 2017
Brake system CLG835H

Structure principle Accumulator charging parameter

Diaphragm type structure is adopted for the Parame-

Items Items Parameters
accumulator, as shown in Figure below. ters
Structure diagram of diaphragm type accumula- Gas charging Below 20°C\
1L\
tor Rated pressure of 68°F
0.26US
capacity accumulator 5.5MPa\
gal
BR1 & BR2 797.5psi
1 Gas charging
Below 20°C\
Rated 20MPa\ pressure of
68°F 9.2MPa\
2 pressure 2900 accumulator
1334psi
BR3
Pre- Charging pres- 13.5~16MPa\
charging Nitrogen sure of accumu- 1957.5~2320
gas lator BR1 & BR2 psi
3 Charging pres-
Working Hydraulic 16MPa\
sure of accumu-
4 medium oil 2320psi
lator BR3

5 Gas charging method of accumulator

1. Inflating port / hex locking screw 4. valve seat
1. Stop the machine, but do not turn off the
2. Pressure vessel 5. Fluid side port electric lock. Depress the brake continuously
3. Diaphragm P18H00049 for more than 20 times, and then press and
Diaphragm type accumulator is used to store release the button of manual solenoid valve
pressure oil for braking and hold pressure of for more than 20 times, drain high-pressure
system. The operating principle is to isolate the oil in the accumulator. Then, unscrew the
fluid under pressure from the air volume plug of oil outlet at lower end of the
chamber with pre-set pressure in the accumulator slowly. At this time, there is
accumulator with diaphragm and store them in residual pressure oil in the accumulator. Note
sealing housing. It absorbs and releases fluid for that the residual pressure oil shall not splash
braking due to change of pressure. When the onto person.
brake pump is operating, it inputs the 2. Remove the protective cap of gas charge
pressurized fluid into the accumulator via charge valve from upper end of one accumulator.
valve to store energy, at this time, air in the air
chamber is compressed so that the pressure of 3. Connect as shown in Figure Below.
liquid is equal to air pressure to achieve energy 4. Turn on the switch of the nitrogen cylinder,
storage. Nitrogen charged into the accumulator after reading of the pressure gauge is stable,
is non-flammable. turn on the switch on gas charge tool, that is,
prop up the gas charge valve in the
accumulator and conduct gas charging.
5. As pressure may reach the limit
The accumulator housing may be hot so as to instantaneously, turn off the switch of
cause burn. nitrogen cylinder, check whether the pressure
reaches limit after reading of pressure gauge
is stable. If insufficient, recharging it. If the
pressure is too high, conduct bleeding using
the bleeding plug on the gas charge tool and
reduce the pressure to a proper value.
 4-61
January 24, 2017 Structure Function Principle
CLG835H Brake system

6. After reaching the specified pressure, turn off Precautions for safety use of accumulator
the switch of the nitrogen cylinder, and then
the switch on gas charge tool. 1. The accumulator shall be checked before
charge of nitrogen. It is prohibited to charge
7. Remove gas charge tool. the accumulator with gas if the accumulator
8. If the accumulator leaks (apply oil onto head does not have a nameplate, or the words on
of the accumulator and check it for bubbles, if the nameplate are missed so that its type can
any, the accumulator leaks), knock down gas not be identified, or if the steel seal marks are
charge valve in the accumulator lightly using incomplete or cannot be read clearly, or if
hammer or small screwdriver to make it move there is defect with the housing and therefore
downwards and then return to its original safe use cannot be ensured.
position so that its sealing surface contacts 2. The accumulator can only be filled with nitro-
completely. gen other than oxygen, compressed air or
9. Install the protective cap of accumulator gas other flammable air to avoid explosion.
charge valve. 3. Slowly charge the nitrogen into the accumu-
10. Conduct gas charging for the other two accu- lator so as to avoid the breakage of the rub-
mulators according to above procedures. ber bag.
Gas charge of accumulator 4. The accumulator shall be installed vertically
with the valve facing upwards. The accumu-
lator shall be stably fixed on the bracket with-
out being welded.
5. Before removal of the accumulator, drain the
pressure oil, release nitrogen in accumulator
using gas charge tool, and then remove
parts.

Maintenance of accumulator

Check directly gas charging pressure in

accumulator using gas charge tool. After the
P18H00050 machine is delivered, check the pressure in
plastic bag once a week; after a month, check it
once a month, after half a year, check it once
every three months; after one year, check it once
half a year. Regular inspection is beneficial for
keeping the accumulator in best service
conditions, finding the leakage early and
conducting repair in time.
4-62
Structure Function Principle January 24, 2017
Brake system CLG835H

Brake cylinder

The brake cylinder, as key actuation component for emergency & parking brake system, is installed on
the left side of front end of transmission housing.

Structural composition and working principle of brake cylinder

The structure of brake cylinder is shown as below, its working pressure is 15.9MPa\2305.5psi. The dis-
engagement and engagement of emergency & parking brake are available with brake cylinder whose
lever is coupled with cam handle. When the system has no oil pressure or the control knob of emergency
& parking brake is pulled up, no pressure oil enters the left chamber of brake cylinder. The spring seat
and piston are always pushed to the left side by force from spring, pull the parking brake lever to engage
it, thus to achieve the brake performance.
When the system reaches the working pressure, and the control knob of emergency & parking brake is
pressed down, the pressure oil flows into the left chamber of brake cylinder through solenoid valve to
compress the spring, push the spring seat and piston to right side and the parking brake lever so as to
release the brake and drive the vehicle. When the oil pressure of accumulator in the circuit of service
brake is lower than 7MPa\1015psi, the cut-off switch of emergency brake acts to cut off the power of
solenoid valve. The hydraulic oil in the parking brake cylinder returns to oil tank via manual solenoid
valve. Force from spring pushes the spring seat and piston left side and pulls the parking brake lever to
lock the brake, meanwhile, transmission shifts to the neutral position to achieve the emergency parking
of loader.
The machine is equipped with parking brake which is released by hydraulic pressure based on spring
action (working of brake cylinder). If the engine, hydraulic system or the brake system fails, the machine
is braked and unable to drive. When the machine fails to drive and needs to be towed, the pin shaft in the
brake cylinder as shown below is removed, tow the machine after the parking brake is released.
Structure diagram of brake cylinder

P18H00051
 4-63
January 24, 2017 Structure Function Principle
CLG835H Brake system

Main parameters of brake cylinder 4. Keep the service brake state and check
whether machine will move.
Service
Items Parameters
conditions
Fully release the
5.2MPa\ 754psi \
pressure If the machine moves during inspection, it
Maximal spring 6422MPa\ may cause personal injury.
\
force 931190psi
Rated capacity 42ml\ 0.011US gal \ Exhaust of brake system
Working pressure 16MPa\ 2320psi
Bleeding position at front/rear axle
Anti-wear hydrau-
Operating fluid HM46/HV46
lic oil

Check the performance of service brake

Before checking the performance of service

brake, you shall inspect the performance of Exhaust hole
parking brake so as to guarantee parking
safety and the effects of emergency brake.

1. Adjust the tire pressure of machine to the P18H00053

specified value, and lay down the bucket lev-
elly at approx. 300mm\ 11.8in from the 1. Stop the machine on a level and straight
ground. And confirm the machine have the road.
performance of good service brake. 2. Turn the shift lever to the neutral position,
2. Start the engine, and drive the machine start up the engine and let it run at idle
toward and on the 25% slope (14°2') and, the speed, activate the parking brake switch;
road surface shall be flat and dry. switch off the low-pressure alarm lights for
service brake and for parking brake, stall the
engine and then activate the electric lock.
3. Put a transparent hose around the exhaus-
tion nozzle of the left/right wheel brake of
front drive axle and the other end of the hose
into the oil pan.
4. It needs the coordination of two persons, one
is to loosen the exhaustion nozzle to observe
the exhaust situation; the other depresses
P18H00052
the pedal firmly after stepping on it several
times continuously until the the liquid column
3. Depress the service brake pedal, stop the without bubbles is discharged, tighten the
machine and place the shift control lever to exhaustion nozzle.
neutral position, and engine won't cut-out.
5. Repeat these steps to discharge the gas from
the rear axle.
4-64
Structure Function Principle January 24, 2017
Hydraulic cooling system CLG835H

6. After the gas in the front/rear axles is dis- Hydraulic cooling system
charged, continuously pull up and press
down the switch of parking brake for 3-4
times, and discharge the gas out of parking A: Overview-components and position
brake.
This machine is equipped with separate
hydraulic fan motor cooling system, which
acquires oil temperature and water temperature
signals of torque converter and temperature
Since there is high pressure oil stored in the signal of air-air inter-cooler, and controls the
wheel brake, special care must be taken speed of fan with program. This not only meets
when bleeding. It is not allowed to loosen needs for system cooling, but also achieves the
fully the bleeding valve. Keep the eyes and purpose of energy saving. The system consists
body away from the bleeding valve in order to of cooling pump, motor, solenoid directional
avoid injuries caused by spraying oil liquid. valve and other pipes (refer to the maintenance
manual of electrical system for electrical
Check for the performance of parking controls).
brake System's features:
1. With electric adjustment, control pressure of
proportional relief valve with signal of current
so as to control inlet flow of motor and adjust
You shall frequently inspect the performance fan speed.
of parking brake so as to guarantee parking 2. The proportional relief valve integrates the
safety and effect of emergency brake. Guar- reversing valve, when the relief valve is
antee parking safety and effect of secondary closed normally, it guarantees the fan works
brake. at full speed in the case of no electrical sig-
nal;
1. Adjust the tire pressure of machine to the
specified value, and lay down the bucket 3. The fan is driven in reverse direction to make
levelly at approx. 300mm\11.8in from the fan work reversely, dredging the impurities
ground. And confirm the machine have the deposited on the radiator;
performance of good service brake.
2. Start the engine and load 5 tons weight and
align the machine at 15% slope (8° 32') and
the pavement shall be flat and dry.
3. Pull the parking brake button, stop the
machine and place the shift control lever to
neutral position, and the engine is not stalled.
 4-65
January 24, 2017 Structure Function Principle
CLG835H Hydraulic cooling system

The schematic and component layout drawing of CLG835H-T4f cooling system are as follows:
Schematic of the hydraulic cooling system

P18H00054
4-66
Structure Function Principle January 24, 2017
Hydraulic cooling system CLG835H

Layout of hydraulic cooling system

1 3

P18H00055

1. Cooling pump 2. Solenoid directional valve 3. Motor

Overview - technical parameters of hydraulic cooling system

Items Parameters
System pressure About 12.5±0.3MPa@1250rpm (fan speed)
System flow 53L/min@2200r/min\14US gpm@2200rpm
Pressure of overload valve at port A 22MPa\3190psi
Pressure of overload valve at port B 22MPa\3190psi
 4-67
January 24, 2017 Structure Function Principle
CLG835H Hydraulic cooling system

Overview - working principle of hydraulic cooling system

Oil line of fan rotation clockwise: Principle of fan reverse rotation:

P18H00056 P18H00057

Working principle: Working principle:

When the solenoid directional valve is not When the solenoid directional valve is energized,
energized, under action of spring force, it works under action of electromagnetic force and
in left position. High pressure oil from cooling standing the spring force, it works in right
pump flows into the port B of cooling motor via position. High pressure oil from cooling pump
solenoid directional valve. The oil in port A of flows into the port A of cooling motor via solenoid
cooling motor enters into radiator via the directional valve. The oil in port B of cooling
solenoid directional valve to achieve clockwise motor enters into radiator via the solenoid
rotation of fan. directional valve to achieve reverse rotation of
fan.
4-68
Structure Function Principle January 24, 2017
Hydraulic cooling system CLG835H

In addition, the electric control system acquires Cooling motor

the temp signal from air-air inter-cooler, oil and
water temp signals from torque converter, to Main technical parameters
control the opening of proportional relief valve,
so that the pressure difference between inlet and Service
outlet of cooling motor, further to control motor Parame-
Items condi- Remarks
flow and fan speed. ters
tions
Theoretical dis-
Cooling pump placement (ml/ 35.5\35.5 / /
r\cc/r)
Main technical parameters Rated/maxi- Set speed
mum speed (r/ 1250/3000 / of fan
Service min) 1250r/min
Parame- Rema
Items condi- Rated pres-
ters rks 18\2610 / /
tions sure (MPa)
Theoretical dis- Volume effi-
0.92 / /
placement (ml/ 26.3\26.3 / / ciency
r\cc/r) Anti-wear
Rated speed (r/ Operating fluid hydraulic HM46/HV46 /
600-2500 / /
min) oil
Rated pressure Bidirec-
20\2900 / / Direction of
(Mpa\psi) tional rota- / /
rotation
tion
Volume efficiency 0.92 / /
Anti-wear Structure and working principle of motor
Operating fluid HM46/HV46 /
hydraulic oil
Direction of rota-
Left rotation / /
The cooling motor, as an actuator of system, is
tion used to pull the fan to rotate, so that the
hydraulic pressure from cooling pump is
Structure and working principle of cooling converted into mechanical energy of fan.
pump
Overall structure of motor:
Since the cooling pump is a tandem pump with Schematic of cooling motor
brake pump, and thus its content is the same
with that of brake pump, please refer to
Structure and working principle of brake pump.

P18H00058

1. A port 2. B port 3. Housing oil

return port
 4-69
January 24, 2017 Structure Function Principle
CLG835H Hydraulic cooling system

Section of cooling motor

P18H00059

Solenoid directional valve

Main technical parameters

Service
Items Parameters
conditions

Rated flux 95L/min\25.1US gpm /

Working voltage 24V /
HM46/
Operating fluid Anti-wear hydraulic oil
HV46

Structure and working principle

1. The solenoid directional valve uses electronic

proportional relief valve to control pressure
drop of oil after passing through cooling
motor so as to control the flow entering into
the motor to control speed of motor, whereby
the speed of fan is controlled well;
2. When the directional valve is not energized,
the high pressure oil from P port flows into A
port of motor, thus driving the fan to rotate
clockwise; when the directional valve is ener-
gized in right position, the high pressure oil
from P port flows into B port of motor, thus
driving the fan to rotate counterclockwise;
3. Bi-directional relief valve mainly plays a part
of secondary relief.
4-70
Structure Function Principle January 24, 2017
Hydraulic cooling system CLG835H

Schematic of the solenoid directional valve

P18H00060

Overall structure of solenoid directional valve:

Overall structure diagram of solenoid directional valve

P T

B A

P18H00061
 4-71
January 24, 2017 Structure Function Principle
CLG835H Emergency steering system

Emergency steering system

A: Overview-components and position

The secondary steering system is composed of secondary steering pump, check valve, priority valve,
steering cylinder and hydraulic oil tank. The secondary steering pump is located at right side of rear
frame, below right rear part of cab. For the positions of corresponding components on the complete
machine, refer to the figure below for details.
Layout of secondary steering system component

1
2

5
3

P18H00062

1. Check valve 3. Secondary steering pump 5. Steering cylinder

2. Priority valve 4. Hydraulic oil tank
4-72
Structure Function Principle January 24, 2017
Emergency steering system CLG835H

B: Overview - technical parameters of sec-

ondary steering system Schematic of secondary steering indicator

Items Parameters
Theoretical displacement
10\10
(ml/r\cc/r)
DC voltage (V) 24
Relief valve pressure
16\2320
(Mpa\psi)
Maximum inlet pressure
2\29
(bar\psi)
Operating fluid Anti-wear hydraulic oil
22-25L/min@52bar\ 5.81-
Flow
6.61US gpm@754psi
190-210A@52bar\ 190-
Current Secondary
210A@754psi
steering indicator
Overview - working principles of secondary
steering system

The check valve of secondary steering system is

closed to protect the pressure oil from flowing
back to the secondary pump during normal
operation of complete machine. If the steering P18H00063
pump fails or engine fails, and complete machine
is energized for more than 30s, the speed of
complete machine is more than 5km/h\3.11mph,
at this time, the secondary steering runs
continuously for 60s, which is recyclable. The
secondary steering pump sucks up the oil from
the hydraulic oil tank, the oil flows through the
secondary steering check valve and meanwhile
closes the steering pump opening check valve
and then reaches the steering cylinder via priority
valve to achieve the secondary steering.
The secondary steering system can use manual
test. The manual test switch is located at right
upright of cab and is a momentary switch, which
is usually ON. When testing the secondary
steering system, the complete machine is
energized but not started, press the test switch
and the secondary steering indicator comes on,
the secondary steering pump starts and the
steering test can be performed.
 4-73
January 24, 2017 Structure Function Principle
CLG835H Pilot system of electronic control third linkage

Pilot system of electronic control third linkage

A: Overview-components and position

The electronic control third linkage uses the proportional valve located at right inner side of front frame to
control the pilot of third linkage. This system leads the oil from the pilot oil supply valve and controls the
pilot pressure of third linkage respectively.
Schematic of pilot system of electronic control third linkage

Pilot lever

Proportional valve

P18H00064
4-74
Structure Function Principle January 24, 2017
Pilot system of electronic control third linkage CLG835H

Overview- system principle

This system is controlled by the roller integrated

on the pilot lever and a lock switch is provided on
the right upright of cab to control the application
of third linkage to avoid mis-operation.
For the machine with the pilot third linkage acting
as electronic control valve, the action of third
linkage is controlled via lock switch, in which
when the switch is under lock state, the
attachment controlled by pilot third linkage can
not work, the quick coupler cylinder is under lock
state, at which the working attachment can not
be installed and removed.
System schematic diagram

P18H00065
 4-75
January 24, 2017 Testing and Adjustment
CLG835H Pressure release of hydraulic system

Testing and Adjustment

Pressure release of hydraulic system

Sudden movement of vehicle or release of oil pressure may cause injury to the persons around
the vehicle.
Perform the following procedures to avoid the possible injury:

Figures Operation instruction Tools

1. Park the vehicle on flat and
level ground, transfer vehi-
cles and workers working
around, place the work
implements on the ground,
and pad the wheel and
install the lock device of
steering frame.

P18H00066

P18H00067

2. Only operators other than

other persons are allowed to
work around vehicle;
4-76
Testing and Adjustment January 24, 2017
Pressure release of hydraulic system CLG835H

Figures Operation instruction Tools

3. Pull up the emergency brake
handle to apply parking
brake.

P18H00068

4. Turn the starting switch to

"OFF" position

P18H00069
5. Operate the control lever of
the work implement to take
the floating lowering & rais-
ing of boom and dumping
and tilting back of bucket.
Release pressure of work
hydraulic system;

P18H00070
 4-77
January 24, 2017 Testing and Adjustment
CLG835H Pressure release of hydraulic system

Figures Operation instruction Tools

6. Depress the service brake
pedal more than 20 times to
release the service brake
system pressure;

P18H00071

7. Limit and immobilize the

wheel to make sure the vehi-
cle in a stopped state, turn
on the cathode switch, and
turn on/off paring brake but-
ton no less than 20 times to
release parking brake sys-
tem pressure.

P18H00072
4-78
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Pressure test of work hydraulic system

CLG835H_T4f loader work hydraulic system has set fast-connection pressure measuring connector or
pressure measuring plug at all key points of loops for the convenience of detecting hydraulic system
pressure and understanding the detection and maintenance of the working condition and fault of the
hydraulic system. The followings are the detailed explanation and the instructions of these pressure
measuring points.

When installing testing instruments for hydraulic system, perform the pressure test and adjust-
ment, pressure shall be released according to Pressure Release of Hydraulic System The pres-
sure test and adjustment shall be performed by professionals; non-professionals shall consult
from the professionals and adjust in strict accordance with instructions from the professionals,
or adjustment is prohibited.

Positions of every gauging points of working hydraulic system

Layout of the pressure measuring point position of the work hydraulic system

5
6

4
3

P18H00073
 4-79
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Description of every gauging points of working hydraulic system

Theoretical
Description of
Pressure mea- pressure Interface
pressure mea- Brief introduction for test
suring point value dimension
suring point
(Mpa\ psi)
Remove the plug, install the pressure measuring
Pressure of
Pressure mea- connector 30C3280 to take the test; after test,
small cavity of 19\2755 M14×1.5-6H
suring point 1 remove the pressure measuring connector and re-
bucket cylinder
assemble the original plug.
Remove the plug, install the pressure measuring
Pressure of big
Pressure mea- connector 30C3280 to take the test; after test,
cavity of bucket 19\2755 M14×1.5-6H
suring point 2 remove the pressure measuring connector and re-
cylinder
assemble the original plug.
Pilot oil supply It can be measured directly by pressure measuring
Pressure mea-
valve outlet 3.5\507.5 M14×1.5-6g connector 30C3278 mounted on complete
suring point 3
pressure machine.
Remove the plug, install the pressure measuring
Pressure of
Pressure mea- connector 30C3280 to take the test; after test,
small cavity of 19\2755 M14×1.5-6H
suring point 4 remove the pressure measuring connector and re-
boom cylinder
assemble the original plug.
Remove the plug, install the pressure measuring
Pressure of big
Pressure mea- connector 30C3280 to take the test; after test,
cavity of boom 19\2755 M14×1.5-6H
suring point 5 remove the pressure measuring connector and re-
cylinder
assemble the original plug.
Pressure at oil It can be measured directly by pressure measuring
Pressure mea-
outlet of work- 19\2755 M14×1.5-6g connector 30C3278 mounted on complete
suring point 6
ing pump machine.
4-80
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Inspection and adjustment for pressure of working hydraulic pressure system

1. Test method

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point
6 (as shown in figure);

Pressure gauge
(range 6MPa/
870psi);

P18H00074

2. Start the machine, idling

without action; The value of
pressure gauge in pressure
measuring point 6 (as
shown in figure) is
2.6±0.1MPa/ 377±14.5psi;
3. In event of reaching the
value, start the machine and
operate the pilot valve to tilt
Pressure gauge
back the bucket with very
(range 40 MPa/
slow speed till suppression;
P18H00075 5800psi).
pay attention to the value on
the pressure gauge of pres-
sure measuring point 6;
4. During step 3, when bucket
is suppressed, the value on
pressure gauge of pressure
measuring point 6 shall be
19±0.3MPa\2755±43.5psi
constantly.
Note: if the pressure measured at the end of oil cylinder may be about 1-2MPa\145-290psi more than
that of pump opening, the variable system pressure is subjected to the pressure of pump opening.
 4-81
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

2. Work system pressure adjustment:

Work system pressure components:

a. The outlet pressure of working pump at idling, namely as the spring setting pressure of working
pump flow control valve. The value of pressure measuring point 6 at working pump opening shall
be 2.6±0.1MPa\ 377±14.5psi by adjusting the flow control valve (refer to adjustment of working
pump);
b. The pressure of LS oil line relief valve of control valve. The value at pressure measuring point 6
shall be 19±0.3MPa\ 2755±43.5psi (after the setting value of flow control valve are met) by adjust-
ing LS relief valve (refer to adjustment for control valve).
If the above two places are set, the work system pressure is always less than 19±0.3MPa/ 2755±43.5psi,
which may be caused by the low cut-off pressure of working pump or low setting pressure of main safety
valve of control valve. Refer to Inspection and adjustment of cut-off pressure of working pump for cut-off
pressure adjustment of working pump, and refer to 6. Inspection and adjustment of main safety valve
pressure of control valve for main safety valve pressure adjustment of control valve.
Note: If the cause that the work system pressure is always less than 19±0.3MPa/ 2755±43.5psi isn't
determined, adjust that according to the following order:
a. First set the pressures of LS relief valve of control valve and the cut-off and setting pressure of
working pump to maximum, and see the respective adjustment for specific operations;
b. Second adjust the setting pressure of main safety valve of control valve to 21±0.3MPa\
3045±43.5psi in sequence (refer to Adjustment and inspection of main safety valve pressure of
control valve), the cut-off pressure of working pump to 20±0.3MPa\ 2900±43.5psi (refer to
Adjustment of cut-off pressure of working pump), and the pressure of LS relief valve to
16.5±0.3MPa\ 2392.5±43.5psi. After the above each pressure meets the adjusted value, refer to
Inspection and adjustment for pressure of work hydraulic system to control the constant pressure
value of pressure gauge in pressure measuring point 6 as 19±0.3MPa\ 2755±43.5psi. Refer to the
following flow chart:
4-82
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Test and adjustment procedures for working hydraulic system pressure

Steps Process Operation method

Standard pressure gauge
Connect the pressure gauge connector(M16X2), measuring
range: 0-6MPa(0-870psi)
Piston type Regulate the pressure of pistion pump LS valve LS relief valve adjusting method:
measure the working pump port unscrew the nut, adjust with inner
pump pressure at idle without operation. hexagon spanner, turn up in
△ P setting clockwise, vice versa.
NO Design pressure of the pistion pump
Whether the pressure LS valve is 2.6MPa(377psi).
is normal
YES
Standard pressure gauge connector
Regulate the pressure of piston pump cut-off valve
and LS valve to maximum, (M16X2), measuring range: 0-
tilt the bucket backward to limit positin, measure 40MPa(0-5800psi)
the working pump port pressure Pressure cut-off valve adjusting
Main safety method: unscrew the nut, adjust with
valve pressure inner hexagon spanner, turn up in
Whether the pressure of NO
of distribution clockwise, vice versa.
piston pump raise During measuring process, it needs
valve is set
YES Adjust the main safety to repeat adjusting and measuring to
Whether the pressure of valve pressure until make it confirm.
main safety valve is normal meets the standard Pressure value of main safety valve
YES is 21MPa(3045psi).
Regulate the pressure of piston pump cut-off valve to Standard pressure gauge
minimum, tilt the bucket backward to limit positin, connector(M16X2), measuring
Piston type range: 0-40MPa(0-5800psi)
measure the working pump port pressure
pump cut-off Tighten up cut-off valve inner
valve pressure hexagon spanner .
is set NO Pressure value of pistion pump cut-
Whether the cut-off valve pump off valve is 20MPa(2900psi).
port pressure is normal
YES

Regulate the pressure of LS relief valve to minimum, Standard pressure gauge

tilt the bucket backward to limit positin, measure the connector(M16X2), measuring
working pump port pressure (or connect pressure gauge range: 0- 40MPa(0-5800psi)
with LS oil passage for testing) Pressure value of LS relief valve is
LS relief valve 20MPa.
Design pressure value of LS
pressure is set NO overflow valve 16.5MPa(2392.5psi)
Whether the LS relief valve
pressure is normal Pressure value of pistion pump port
is 19MPa(2755psi).
YES Screw tighten LS valve and cut off
valve hexagon and nut.
Set completed
 4-83
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Adjustment of working pump Adjustment of control valve

1 1 2
2 3
3 4
5

P18H00077

1. Flow control valve 4. Flow control valve

2. Pressure shut-off valve screw rod
screw rod 5. Pressure shut-off valve
3. Pressure shut-off valve nut
6. Flow control valve nut

1. Working pump adjustment: setting method

for pressure of flow control valve 1: 6
4 5
a. Loosen the hexagon nut 6 with open-end P18H00078
wrench (13mm);
1. Overload valve of boom 4. Overload valve of boom
b. Set the adjusting screw rod 5 of flow con- big cavity small cavity
trol valve with inner hexagon spanner 2. Overload valve of 5. Overload valve of
bucket big cavity bucket small cavity
(3mm). It is turned up in clockwise and 3. Main safety valve of 6. LS Relief valve:
turned down in counterclockwise. control valve
2. Setting method for pressure of pressure shut- 1. Setting method for pressure of overload
off valve 2: valve of bucket big cavity:
a. Loosen the hexagon nut 3 with open-end a. Remove the plastic protective sleeve
wrench (13mm); installed outside of overload valve, and
b. Set the adjusting screw rod 4 of pressure loosen locknut with wrench;
compensation valve with inner hexagon b. Set the screw rod of overload valve with
spanner (3mm). It is turned up in clockwise inner hexagon spanner. It is turned up in
and turned down in counterclockwise. clockwise and turned down in counter-
clockwise.
The setting method of overload valve of boom
big cavity, overload valve of boom small cavity,
overload valve of bucket small cavity, main
safety valve of control valve is as above.
4-84
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Pressure inspection and adjustment of overload valve of bucket tilting large cham-
ber

1. Test method

Figures Operation instruction Tools

1. Remove the plug, install the
pressure measuring connec-
tor 30C3280; connect the
pressure gauge at pressure
measuring point;

Pressure gauge
(range 40MPa\
5800psi);

P18H00079
2. Start the machine and lift the
boom to the maximum posi-
tion (when diesel engine and
hydraulic oil is under normal
operating temperature, the
diesel engine will be in idle
running);

P18H00080
 4-85
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

3. Operate the pilot valve to
make it in the bucket tilting
back position so that the
bucket will rotate to the
maximum bucket tilting back
position;
4. The level returns to the
neutral position;

P18H00081
5. Operate the pilot valve to
make it in lowering position
of the boom to lower the
boom; check the pressure
gauge at the same time;

P18H00082

6. When taking step 5, the

maximum pressure value of
pressure gauge at pressure
measuring point shall be
23±0.3MPa\ 3335±43.5psi.

P18H00083

2. Adjusting step:
If the pressure is nonconforming, adjust it according to adjustment for pressure of control valve and
recheck whether the adjusting pressure is correct.
4-86
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Pressure inspection and adjustment of overload valve of bucket tilting small cham-
ber

1. Test method

Figures Operation instruction Tools

1. Remove the plug, install the
pressure measuring connec-
tor 30C3280; connect the
pressure gauge at pressure
measuring point;

Pressure gauge
(range 40MPa\
5800psi);

P18H00084

2. Start the machine, operate

the lever to lift boom to hori-
zontal position (when the
diesel engine and hydraulic
oil is under normal operating
temperature, the diesel
engine will be in idle run-
ning)

P18H00085
 4-87
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

3. Operate the lever to make
the bucket in maximum
dumping position;
4. The level returns to the
neutral position;

P18H00086

5. Operate the pilot valve to

make it in boom raising posi-
tion to lift the boom; mean-
while, observe the pressure
gauge;

P18H00087

6. When taking the step 5, the

maximum pressure value
that can be displayed by
pressure gauge at test point
shall be 23±0.3MPa\
3335±43.5psi.

P18H00088

2. Adjusting step:
If the pressure is nonconforming, adjust it according to adjustment for pressure of control valve and
recheck whether the adjusting pressure is correct.
4-88
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Pressure inspection and adjustment of main safety valve of control valve

1. Test method

Note: Set the pressures of LS relief valve and the cut-off pressure of working pump to maximum before
adjusting the main safety valve of control valve, and then perform the following steps. In fact, the safety
valve basically does not work in the work hydraulic system, so it is not be adjusted in general.

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point;

Pressure gauge
(range 40MPa\
5800psi);

P18H00089

2. Start the machine, operate

the lever to lift boom to
horizontal position (when the
diesel engine and hydraulic
oil is under normal operating
temperature, the diesel
engine will be in idle
running)

P18H00090

3. The level returns to the

neutral position;
 4-89
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

4. Operate the pilot valve to
make it in bucket tilt back so
as to rotate the bucket to the
maximum rear tilting back
position and keep it
suppressed;

P18H00091

5. When taking step 4, the

maximum pressure value of
pressure gauge at pressure
measuring point shall be
21±0.3Mpa\ 3045±43.5psi.

P18H00092

2. Adjusting step:

If the main safety valve pressure of control valve is nonconforming, adjust it according to the Adjustment
for pressure of control valve and recheck whether the adjusting pressure is correct. After the correct
adjustment is completed, recover the pressure of LS relief valve and the cut-off pressure of working
pump.
4-90
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Inspection and adjustment for cut-off pressure of working pump

1. Test method

Note: the pressures of LS relief valve of control valve should be adjusted to the maximum and the pres-
sure of main safety valve of control valve should also be adjusted properly before adjusting the cut-off
pressure of working pump.

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point
6;

Pressure gauge
(range 40MPa\
5800psi);

P18H00093

2. Start the machine, operate

the lever to lift boom to hori-
zontal position (when the
diesel engine and hydraulic
oil is under normal operating
temperature, the diesel
engine will be in idle run-
ning)

P18H00094

3. The level returns to the neu-

tral position;
 4-91
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

4. Operate the pilot valve to
make it in bucket tilt back so
as to rotate the bucket to the
maximum rear tilting back
position and keep it sup-
pressed;

P18H00095

5. When taking step 4, the

maximum pressure value of
pressure gauge at pressure
measuring point shall be 1-
2MPa\ 145-290psi.

P18H00096

2. Adjusting step:

If the cut-off pressure of working pump is nonconforming, adjust it according to the adjustment for pres-
sure of working pump and recheck whether the adjusting pressure is correct. After the correct adjust-
ment is completed, recover the working pressure of work hydraulic system.
4-92
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Adjustment for LS relief pressure of control valve

1. Test method

Note: the pressure of main safety valve of control valve and the cut-off pressure of working pump should
be adjusted properly before adjusting the pressure of LS relief of control valve.

LS Relief valve:
Adjustment method: using 2 open-
end wrenches of 17mm, one
wrench gets valve body stuck,
and the other unscrews the lock
nut. Adjust the valve rod with inner
hexagon wrench, turn it clockwise
for waxing and anticlockwise for
waning.

P18H00097

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point;

Pressure gauge
(range 40MPa\
5800psi);

P18H00098
 4-93
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

2. Start the machine, operate
the lever to lift boom to
horizontal position (when the
diesel engine and hydraulic
oil is under normal operating
temperature, the diesel
engine will be in idle
running)

P18H00099

3. The level returns to the

neutral position;
4. Operate the pilot valve to
make it in bucket tilt back so
as to rotate the bucket to the
maximum rear tilting back
position and keep it
suppressed;

P18H00100

5. When taking step 4, the

maximum pressure value of
pressure gauge at pressure
measuring point shall be
19±0.3MPa/ 2755±43.5psi.

P18H00101
4-94
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Pressure inspection and adjustment of the pilot oil supply valve

1. Test method

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point;

Pressure gauge
(range 6 MPa);

P18H00102

2. Start the machine, operate

the lever to lift boom to
horizontal position (when the
diesel engine and hydraulic
oil is under normal operating
temperature, the diesel
engine will be in idle
running)

P18H00103

3. The level returns to the neu-

tral position;
 4-95
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Figures Operation instruction Tools

4. Operate the pilot valve to
make it in bucket tilt back so
as to rotate the bucket to the
maximum rear tilting back
position and keep it
suppressed;

P18H00104

5. When taking step 4, the

pressure value of the
pressure gauge at pressure
measuring point 3 shall be
3.5±0.2MPa\507.5±29psi.

P18H00105

2. Adjustment method:

If the pressure is incorrect, adjust the pressure of the pressure reducing valve for the pilot oil supply
valve (for specific method, refer to the adjusting steps of the pressure reducing valve for the pilot oil sup-
ply valve) to make it reach 3.5±0.2MPa\ 507.5±29psi.
4-96
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Boom cylinder test

Temperature of test oil:50±5°C\ 122±41°F

P18H00106

Test items Test method Criterion

Adjust the pressure of test system to make the
tested hydraulic cylinder start without load condi-
The hydraulic cylinder operates smoothly with-
Commissioning tion and conduct full stroke reciprocating motion
out being stuck.
for more than 3 times to bleed the air from the
hydraulic cylinder.
Stop the tested hydraulic cylinder piston at both
ends of stroke respectively (single-acting hydrau-
Pressure tight External leakage and damaged parts are not
lic cylinder stopped at the limit position of stroke),
test allowed.
then apply 1.5 times rated pressure of oil to the
working chamber and keep for 10s.
Supply oil to the working chamber of tested
Internal leakage hydraulic cylinder, then increase the pressure to
Internal leakage≤0.28ml/min\ 0.000074US gpm
test the working pressure, measure the oil leakage at
port of small cavity for 2min.
Stop the tested hydraulic cylinder piston at the
Stroke test limit positions at both ends of stroke respectively, 727mm~729mm\ 28.6~28.7in
then measure its stroke length.
 4-97
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Bucket cylinder test

Temperature of test oil: 50±5°C\ 122±41°F

P18H00107

Test items Test method Criterion

Adjust the pressure of test system to make the
tested hydraulic cylinder start without load con-
The hydraulic cylinder operates smoothly without
Commissioning dition and conduct full stroke reciprocating
being stuck.
motion for more than 3 times to bleed the air
from the hydraulic cylinder.
Stop the tested hydraulic cylinder piston at both
ends of stroke respectively (single-acting
Pressure tight External leakage and damaged parts are not
hydraulic cylinder stopped at the limit position of
test allowed.
stroke), then apply 1.5 times rated pressure of
oil to the working chamber and keep for 10s.
Supply oil to the working chamber of tested
Internal leak- hydraulic cylinder, then increase the pressure to
Internal leakage≤0.30ml/min\ 0.000079US gpm
age test the working pressure, measure the oil leakage
at port of small cavity for 2min.
Stop the tested hydraulic cylinder piston at the
Stroke test limit positions at both ends of stroke respec- 519mm~521mm\ 20.4~20.5in
tively, then measure its stroke length.
4-98
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Steering hydraulic system test

CLG835H_T4f loader steering hydraulic system has set fast-connection pressure measuring connector
or pressure measuring plug at all key points of loops for the convenience of detecting hydraulic system
pressure and understanding the detection and maintenance of the steering condition and fault of the
hydraulic system. The followings are the detailed explanation and the instructions of these pressure
measuring points.

When installing testing instruments for hydraulic system, perform the pressure test and adjust-
ment, pressure shall be released. The pressure test and adjustment shall be performed by pro-
fessionals; non-professionals shall consult from the professionals and adjust in strict
accordance with instructions from the professionals, or adjustment is prohibited.

Measuring point position of steering hydraulic system

Layout of all measuring point position of steering hydraulic system

P18H00108
 4-99
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Description of measuring points of steering hydraulic system

Pressure Description of Theoretical

Interface
measuring pressure mea- pressure value Testing step
dimension
point suring point (Mpa\ psi)
Remove the plug, install the pressure measuring
Pressure Pressure of small
connector 30C3280 to take the test; after test,
measuring cavity of right 17.5\2537.5 M14×1.5-6H
remove the pressure measuring connector and re-
point 1 steering cylinder
assemble the original plug.
Remove the plug, install the pressure measuring
Pressure Pressure of small
connector 30C3280 to take the test; after test,
measuring cavity of left 17.5\2537.5 M14×1.5-6H
remove the pressure measuring connector and re-
point 2 steering cylinder
assemble the original plug.

Pressure testing and adjustment of steering hydraulic system

1. Testing method

Figures Operation instruction Tools

1. Install the pressure gauge at
pressure measuring point as
shown in figure;

Pressure gauge
(range 25MPa\
3625psi);

P18H00109
4-100
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Figures Operation instruction Tools

2. Start machine and operate
the steering wheel to make
machine turn to maximum
steering angle slowly and
suppress the steering.

P18H00110

P18H00111

3. During the process of step 2

suppress steering, the pres-
sure value of pressure
gauge at pressure measur-
ing point shall be
20±0.3MPa\ 2900±43.5psi
constantly.

P18H00112

Note: if the pressure measured at the end of oil cylinder may be about 1-2MPa\ 145-290psi more than
that of pump opening, the variable system pressure is subjected to the pressure of pump opening.
 4-101
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

2. Pressure adjustment:

a. Since the steering hydraulic system and work hydraulic system for this machine share the plunger
pump, if there is problem with pressure, test whether the pressure of the plunger pump is normal
according to “Pressure Test of Working Hydraulic System” and make correct adjustment.
b. LS relief pressure of priority valve can not be adjusted.

Steering cylinder test

Temperature of test oil: 50±5°C\

122±41°F

P18H00113

Test items Test method Criterion

Adjust the pressure of test system to make the tested hydraulic
cylinder start without load condition and conduct full stroke The hydraulic cylinder operates
Commissioning
reciprocating motion for more than 3 times to bleed the air smoothly without being stuck.
from the hydraulic cylinder.
Stop the tested hydraulic cylinder piston at both ends of stroke
Pressure tight respectively (single-acting hydraulic cylinder stopped at the External leakage and damaged parts
test limit position of stroke), then apply 1.5 times rated pressure of are not allowed.
oil to the working chamber and keep for 10s.
Supply oil to the working chamber of tested hydraulic cylinder,
Internal Internal leakage≤0.13ml/min\
then increase the pressure to the working pressure, measure
leakage test 0.000034US gpm
the oil leakage at port of small cavity for 2min.

Stop the tested hydraulic cylinder piston at the limit positions at

Stroke test both ends of stroke respectively, then measure its stroke 419mm~421mm\16.5~16.6In
length.
4-102
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Brake system test

CLG835H T4f loader brake hydraulic system has set pressure measuring connector at all key points of
loops for the convenience of the detecting hydraulic system pressure and understanding brake condi-
tions and the detection and maintenance of the faults of hydraulic system. The followings are the
detailed explanation and the instructions for these pressure measuring points.

When installing testing instruments for hydraulic system, perform the pressure test and adjust-
ment, pressure shall be released according to Pressure Release of Hydraulic System. The pres-
sure test and adjustment shall be performed by professionals; non-professionals shall consult
from the professionals and adjust in strict accordance with instructions from the professionals,
or adjustment is prohibited.

Layout of pressure measuring points of brake system

Layout of pressure measuring points of brake system

P18H00114
 4-103
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Description of pressure measuring points of brake system

Pressure Theoretical
Description of pres- Interface dimen-
measuring pressure value Test specification
sure measuring point sion
point (Mpa\ psi)
Pressure It can be measured directly by pressure
Rear axle brake
measuring 6±0.4\870±58 NPT 1/8 measuring connector 30C3281 mounted
pressure
point 1 on complete machine.
Pressure It can be measured directly by pressure
Front axle brake
measuring 6±0.4\870±58 NPT 1/8 measuring connector 30C3281 mounted
pressure
point 2 on complete machine.
Pressure It can be measured directly by pressure
Outlet pressure of
measuring 16\2320 M14×1.5-6g measuring connector 30C3278 mounted
brake pump
point 3 on complete machine.

Test method of rear axle brake pressure

The low pressure alarm switch is equipped for the rear axle brake pressure during design, in order to act
as low pressure alarm while the pressure decreasing. Therefore, under general conditions, when no low
pressure alarm and brake performance for complete machine can meet the service brake performance
described in 3.6, there is no need to adjust rear axle brake pressure.

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point;

Pressure gauge
(range 6 Mpa\
870psi);

P18H00115

2. Start the machine and warm

it for 3 minutes;
4-104
Testing and Adjustment January 24, 2017
Pressure test of work hydraulic system CLG835H

Figures Operation instruction Tools

3. Depress the brake pedal
and hold it to the maximum
angle; check the reading of
pressure gauge, which shall
be 6±0.4MPa\ 870±58psi at
this time.

P18H00116

P18H00117
 4-105
January 24, 2017 Testing and Adjustment
CLG835H Pressure test of work hydraulic system

Test method of front axle brake pressure

The low pressure alarm switch is equipped for the front axle brake pressure during design, in order to act
as low pressure alarm while the pressure decreasing. Therefore, under general conditions, when no low
pressure alarm and brake performance for complete machine can meet the service brake performance,
there is no need to adjust front axle brake pressure.

Figures Operation instruction Tools

1. Connect the pressure gauge
at pressure measuring point
2;

Pressure gauge
(range 6 Mpa\
870psi);

P18H00118

2. Start the machine and warm

it for 3 minutes;

P18H00116
4-106
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

3. Depress the brake pedal
and hold it to the maximum
angle; check the reading of
pressure gauge, which shall
be 6±0.4MPa\ 870±58psi at
this time.

P18H00117

Removal and Installation

Work hydraulic system

Removal and installation of hydraulic oil tank assembly

Removal for hydraulic oil tank assembly

Figures Operation instruction Tools

1. Loosen the plug at the top of
hydraulic oil tank breather
and press the bleed screw in
it to bleed the air;

P18H00121
 4-107
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

2. Find the drain plug at bottom
of right oil tank at rear frame,
and then wipe clean the cir-
cumference of drain plug;
3. Place a clean oil basin
below the drain plug for col-
Oil basin;
lecting the hydraulic oil;
screw off the drain plug; Open-end
wrench: 30mm

P18H00122

4. After the hydraulic oil in the

hydraulic oil tank is drained,
hang the lug welded on both
sides of the hydraulic oil
tank with a lifting rope;
Lifting rope

P18H00123

5. Loosen the oil suction hose

clamp of the plunger pump
and gear pump located at
lower part of back of oil tank,
remove the oil suction hose Open-end
and mask the oil ports; wrench: 8,
remove the oil suction hose 36mm;
joint of secondary steering
pump (option) and mask oil
P18H00124 ports.
4-108
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

6. Remove the oil return hose
1 2 5 located at upper part of back
3 4 6 of oil tank, mask oil ports;

7 Open-end
wrench: 13, 17,
22, 24, 32, 36,
41mm;

P18H00125

7. Unscrew out the 8 fastening

bolts on both edges of the
hydraulic oil tank side;

Open-end
wrench: 15 mm

P18H00126

8. Lift the hydraulic oil tank

slowly away; note that the 2T \4410lb
lifting process must be traveling crane;
smooth, it is not allowed to
damage the other areas of Lifting rope
the complete machine;
 4-109
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Installation for hydraulic oil tank assembly

Figures Operation instruction Tools

1. Check the oil tank for impuri-
ties, if any, it should be
cleaned before installation
2. Install one end of oil suction
hose to the oil suction steel
pipe with clamp and install
the steel pipe to the oil suc-
tion of oil tank

P18H00127

3. Hang the oil tank with travel-

ing crane and install the
other end of suction hose to
the oil suction steel pipe of
pump, meanwhile pre-
tighten the mounting bolt of Open-end
oil tank, and tighten the oil wrench: 8,
suction hose clamp 36mm;

P18H00128

4. Connect hoses to the oil

ports of oil tank according to
the connection in the
removal steps
4-110
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Removal and installation of the plunger pump

Removal of the plunger pump

Removal steps:

Figures Operation instruction Tools

1. Remove the driver seat and
the access port plate of the
bottom plate to expose the
access port at the bottom of
the driver seat;
2. Refer to the steps 3, 4 in
Installation Position and
Functional Structure for
draining the hydraulic oil;
3. Remove the hose assem-
bly, plate, check valve from
the plunger pump opening
and then mask the oil ports;

Open-end
wrench: 17, 21,
32mm

P18H00129
 4-111
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

4. Remove the oil suction steel
pipe of the plunger pump

Open-end
wrench: 15mm;

P18H00130

5. Install a lifting hook on the

beam at the bottom of the Hook;
cab, and tie and hang it on
the pump assembly with a Lifting rope
lifting rope;
6. Unscrew the 4 fastening
nuts of the plunger pump;
7. Take out the pump and block
the oil port.

Open-end
wrench: 21mm;

P18H00131
4-112
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Installation of plunger pump

The housing of assembled plunger pump must be filled with oil before starting the complete machine to
prevent the skid shoe from damage due to dry friction after starting.

Figures Operation instruction Tools

1. Check the pump for dam-
age, rusting and if qualified,
hang the pump to the
mounting position and install
the stud bolt to the gearbox;
2. Install the oil suction steel
pipe to the plunger pump,
tighten the bolts with the
tightening torque 90±12Nm\
66.4±8.9lbf·ft

Open-end
wrench: 15mm;

P18H00132
 4-113
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

3. When the spline shaft is
coupled with gearbox, install
the nut to the stud bolt and
tighten it with torque
160±20Nm\ 118±14.8lbf·ft
Open-end
wrench: 21mm;

P18H00133

4. Install the plate, check valve

to the plunger pump opening
with the tightening torque of
flange mounting bolt
145±15Nm\ 107±11.1lbf·ft
Open-end
wrench: 21mm;

P18H00134

5. Connect the return oil hose

of the plunger pump housing
with the tightening torque of
hose joint 89 ± 4Nm\ 65.6 ±
3.0lbf·ft
Open-end
wrench: 32mm;

P18H00135
4-114
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

6. Connect the LS hose of the
plunger pump with the tight-
ening torque of hose joint
16±1Nm\ 11.8±0.74lbf·ft

Open-end
wrench: 17mm;

P18H00136

7. Start the machine and idle it

for 2min
Note: If any abnormal noise or
shake is heard, please stop the
machine immediately and check
whether the pipe is normal or
not
8. Check the pipe connections
for oil leakage
9. Refer to the Seat and Bot-
tom Plate Overhaul Manual
for recovering the seat and
bottom plate
10. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-115
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Removal and installation of boom cylinder

Removal of boom cylinder

Place the machine in horizontal hard ground →lay flat the bucket →pull the hand brake →shut
down→release the pressure in the boom cylinder.
Removal steps (take the left boom oil cylinder as an example, and the removal steps of the right boom oil
cylinder are the same as those of the left boom oil cylinder):

Figures Operation instruction Tools

Warning: Refer to the
steps 3, 4 in Pressure
Release of Hydraulic System
for pressure relief of hydrau-
lic system.
1. Place an oil collecting con-
tainer under the bottom of Oil collecting
vehicle to prevent hydraulic container
oil from polluting ground;
2. Remove boom pin lubrica-
tion lines;

P18H00137
4-116
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

The boom shall be sup-
ported firmly before
removing the oil cylinder to
prevent the boom from fall-
ing.

P18H00138

3. Sleeve the lifting rope con-

forming to safety require- Lifting rope;
ments on the boom oil
cylinder and hang the boom 2T\4410lb
oil cylinder with a traveling traveling crane
crane.
4. Loosen the hose plate bolt
connected with the steel
pipe below the big and small
cavities of the boom oil cylin-
der, remove the hose
assembly and mask the
Open-end
hose joint.
wrench: 13mm

P18H00139

5. Remove the bolt tightening

the front pin shaft of the
Copper bar;
boom and knock out the pin
shaft with a copper bar. Open-end
wrench: 27mm
P18H00140

6. Remove the tightening bolt

of the rear pin shaft of the
boom cylinder and knock out
the pin shaft with a copper
bar.
P18H00141
 4-117
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

7. Lift out the boom cylinder
from the frame and place it
on a level ground.
8. Remove steel pipe clamp of Open-end
the big and small cavities of wrench: 13mm;
the boom cylinder and place
it together with the removed Inner hexagon
P18H00142 spanner: 6mm
bolts, nuts.
9. Remove the tightening bolt
of the steel pipe of big and
small cavities of the boom
cylinder and remove the
steel pipe; check whether
Open-end
the O-ring is aged or dam-
wrench: 16mm;
aged and replace it in time,
P18H00143 mask the oil ports of steel Shielding film
pipe.
10. Mask the big and small cav-
ity oil ports of boom cylinder
to avoid pollution.

Installation of boom cylinder

Figures Operation instruction Tools

1. Install the steel pipe of big
and small cavities of the
boom cylinder to the cylinder
and tighten 8 mounting bolts
Open-end
to 52±6Nm\ 38.4±4.4lbf·ft,
wrench: 16mm
check whether the O-ring is
P18H00144
aged or damaged and
replace it in time before
installation.
2. Install the pipe clamp,
tighten the bolts, shims, nuts
with the tightening torque Open-end
26±4Nm\ 19.2±3.0lbf·ft wrench: 13mm
P18H00145

The boom shall be sup-

ported firmly before
installing the oil cylinder to
prevent the boom from fall-
ing.
4-118
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

3. Lift and place the cylinder to
the proper position with
proper sling

P18H00146

4. Install rear pin shaft of boom

cylinder, and tighten mount-
ing bolt of pin shaft to
90±12Nm\ 66.4±8.9lbf·ft.
P18H00147

5. Align the pin hole of boom

cylinder piston rod connect-
ing fork with that of boom,
and then insert the pin shaft
into the pin hole, tighten
P18H00148 mounting bolt of pin shaft to
310±45Nm\ 228.6±33.2lbf·ft.
6. Connect the big and small
cavity hoses of boom cylin-
der, tighten the plate bolt to
72±6Nm\ 53.1±4.4lbf·ft.

P18H00149
 4-119
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

7. Install the centralized lubri-
cation line joint. Install the
centralized lubrication line
joint.

P18H00150

8. Start the machine, and run it

at idle speed, slowly lift and
lower the boom cylinder for
3-5 times to bleed the air in
the cylinder and line.
9. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level.
4-120
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Disassembly and assembly of boom cylinder

Disassembly of boom cylinder

Exploded view of boom cylinder

17
16
15
11
12
11
9

20
2 21
19 3
18
4
10 6
8
14
7
13
8
2
3
4

1
22

23
22 P18H00187

1. Cylinder block 5. Piston rod 9. O-ring 13.O-ring 17.Spring 21.Screw

2. Bolt 6. Piston 10.Cylinder head 14.Snap ring retainer 22.Seal ring
3. Cover 7. Seal ring 11.Support ring 15.Y-seal 18.Washer 23.Bushing
4. Cushion 8. Supporting ring 12.Seal 16.Dust ring 19.Screw
20.Steel ball
 4-121
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Removal steps

Figures Operation instruction Tools

1. Loosen the 12 M16×70-
10.9-Zn.D bolts diagonally
(as shown by arrows in fig-
ure) with blower gun and
then remove them one by
one together with washer. Blower gun
Link for
assembling
14mm hex bolt

P18H00152
2. Put one end of lifting rope
through the piston rod dual
lug (single lug for bucket cyl-
inder ) and fix it crosswise
with the other end on the lift-
ing equipment, and then
conduct slow, uniform and
vertical lifting, place the pis-
ton rod group horizontally on
special working position
Lifting
apparatus after it (see left
equipment
figure) separates from cylin-
der block completely (Note: Lifting rope
the contact surface of work-
ing position apparatus and
the cylinder shall be made of
soft material.
Note: Put clean cotton on the
P18H00153 contact surface of working
position apparatus and piston
rod to prevent the rod from
being scratched.
4-122
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Figure 1 3. Fix the lug of piston rod
group, unscrew setscrew on
piston using inner hexagon
spanner and take out the
screw and steel ball (see left
picture in figure 1).
4. Assemble the tightening
tooling for piston in auxiliary
hole on the piston (see right
Setscrew+steel picture in figure 1), unscrew
Auxiliary P18H00154 piston using blower gun via Inner hexagon
Figure 2 tightening tooling, and then spanner: 4mm
remove the piston from pis-
Tightening
ton rod group along with
tooling for piston
axial direction of piston rod.
Blower gun
5. Install protective sleeve
matched with thread at small Thread
end of piston rod on the protective sleeve
threaded position (see Fig-
ure 2) and remove the cylin-
der head from piston rod
group along with axial direc-
tion of piston rod.
Note: the protective sleeve is
used to prevent the seals from
Thread protective sleeve being scratched when removing
P18H00155
the cylinder head from piston
rod.
 4-123
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Inspection and clean of boom cylinder

Figures Operation instruction Tools

Piston group:

Fig. I

Glyd ring squeezed

out and crashed
Inspection of part:
1. Inspection of piston group:
1) Inspection of piston seal:
a. Check whether glyd ring
Support ring is scratched, worn,
burned and damaged extruded and collapsed
P18H00156
(Figure 1 and Figure 2).
Fig 2 b. Check whether support
ring is scratched,
strained, worn and burnt
(Figure 1 and Figure 3).
c. Check whether O-ring at
static seal of piston is
worn and trimmed.
4) Inspection of piston:
Glyd ring shows wear a. Check whether contour of
while the wear is average
P18H00157 piston is scratched and
strained (Figure 4).
Figure 3 b. Check whether two end
surfaces are compressed
seriously (Figure 5).

Part of support ring The inner rings of 2#

(locking end) shows two support ring shows
vertical scratch a round of wear
P18H00158
4-124
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Fig 4

Outer circle of
piston shows scratch
P18H00159

Fig 5
End surface of
lead plug shows
imprint

P18H00160
 4-125
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Cylinder head assembly 2. Inspection of cylinder head
assembly:
Fig. I
1) Inspection of cylinder head
seal:
Support ring
has paint a. Check whether the dust
cover is scratched, worn
and damaged.
b. Check whether Y-seal is
scratched, worn, dam-
aged and burnt.
c. Check whether support
P18H00161 ring is scratched,
strained, worn, burnt and
Fig 2 attached with foreign mat-
ter. (Figure 1)
d. Check whether the buffer
ring is worn and dam-
aged.
e. Check whether O-ring at
static seal of cylinder
head is worn and
Cylinder head inner trimmed.
hole has leaning wear
P18H00162 6) Inspection of cylinder head:
a. Check whether the cylin-
der head bore is
scratched, strained and
eccentrically worn (Fig-
ure 2).
b. Check each part of cylin-
der head for crack.
4-126
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Piston rod: 3. Inspection of piston rod:

Fig. I a. Check whether the piston

rod body (chrome plated
One draw mark crosses through area) is bumped,
the chrome plated area scratched, rusted and
dechromed (Figure 1).
b. Check whether the thread
at small end of piston rod
is rusted and damaged
(mess thread) (Figure 2).
c. Check whether small end
P18H00163
contour of piston rod is
rusted. Fig 3
Fig 2

Thread
has 17mm
damaged part

P18H00164

Figure 3

Small head
outer ring rusts

Rod shoulder
guide ring rusts P18H00165
 4-127
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Cylinder block 4. Inspection of cylinder block:

Fig. I a. Check inner wall of cylin-

der block for score or
scratch (Figure 1).
Cylinder score & scratch is distinct
b. Check whether the flange
thread is damaged (mess
thread).
c. Check whether the bush-
ing of cylinder head is
eccentrically worn and
cracked (Figure 2).
P18H00166

Fig 2

Bushing has leaning

wear & cranks

P18H00167

Cleaning of part:
Clean cylinder block, piston rod,
cylinder head and piston using
kerosene and detergent, and
then dry all parts with
compressed air.
4-128
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Assembly of boom cylinder

Figures Operation instruction Tools

Assembly of piston group: 1. Assembly of piston group
(assembly of seal):
Fig. I
a. Clean the piston, and
then place it horizontally
on the assembling stand.
b. Press the inner ring
(square ring) of glyd ring
into the middle groove
(figure 1) with special tool- Assembling
Square ring ing and then separate the tooling for glyd
outer ring (with opening) ring
of glyd ring by hands and
assemble it to the outside
of square ring.
c. Separate the supporting
ring (with opening) by
hands and assemble it to
the groove of supporting
P18H00168
ring.
 4-129
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Assembly of cylinder head assembly: 2. Assembly of cylinder head
assembly (assembly of
Fig. I seal):

1 a. Clean the cylinder head,

and place it on the
2 assembly stand as shown
in figure 1 (dust ring side
faces upward).
3
b. As shown in Figure 2,
assemble Y-ring into
green groove (shown in
Figure 1) with dual lip of
4
Y-ring facing downwards
5 (facing to the support
ring).
1. Pink: groove of dust ring
2. Green: Groove of Y-ring c. Press dust ring metal
3. Red: groove of support ring frame excircle vertically
4. Blue: groove of buffer ring
into pink groove (shown in
5. Groove of O-ring P18H00169
Figure 1) with special tool-
Fig 2 ing (shown in Figure 3) Assembling
with dual lip of dust ring tooling for dust
facing downwards (facing ring
to the support ring).
d. Turn over the cylinder
head with the dust ring
facing downwards.
e. Press the supporting ring
(with opening) slightly by
hands and install it to the
red groove shown in fig-
ure 1.
P18H00170 f. Install the O-ring of buffer
ring (formed by O-ring
and seal ring) to the blue
groove shown in figure 1
and then install the seal
ring to the outside of O-
ring.
g. Install the O-ring and
snap ring to the groove of
O-ring.
4-130
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Figure 3

P18H00171
 4-131
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Assembly of piston rod group 3. Assembly of piston rod
group:
Fig. I
a. Fix the lug (boom cylin-
der: dual-lug, bucket cyl-
inder: single lug) of piston
rod on the special tooling
to make it not rotate.
b. Put the thread protective
sleeve (red ring in figure
1) on the thread at small
end of piston rod to avoid
P18H00172 scratching the seal.
Fig 2 c. Apply clean hydraulic oil
on the surface of piston Fixing tooling for
rod and push the cylinder piston rod
head (dust ring side fac- Thread
ing towards the rod head) protective sleeve
into the rod body (green
ring in figure 1) along with Blower gun
axial direction of piston Tightening
rod. tooling for piston
P18H00173 d. Remove the thread pro- Inner hexagon
tective sleeve. wrench: 4mm
e. Install the piston to the
small end of piston rod
with the tightening tooling
for piston and then tighten
it with blower gun (figure
2).
f. Install the steel ball into
the threaded hole of the
piston.
g. Screw the setscrew to the
threaded hole of the pis-
ton with inner hexagon
spanner.
4-132
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Fig. I 4. Assembly of oil cylinder
assembly:
a. Fix the cylinder block on
the assembly stand (fig-
ure 1) to make it not
rotate, apply clean
hydraulic oil to the inner
chamber of cylinder block
about 300mm\11.8in from
top to bottom.
b. Lift the piston rod group
with sling and apply clean
hydraulic oil to the excir-
cle of piston, then install it Lifting rig
to the cylinder block verti-
Lifting rope
cally along with the axis of
P18H00174 inner chamber of cylinder Blower gun
block.
c. Screw 12 M16×70-10.9-
Zn.D screws to the
threaded hole (screwed
for at least 5 threads) by
hands, then tighten the
screws to the range
267±45Nm\196.9±33.2lbf·
ft one by one diagonally
with blower gun.
d. Seal the big and small
cavity of oil port with spe-
cial cap.
 4-133
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Removal and installation of bucket cylinder

Removal of bucket cylinder

Place the machine in horizontal hard ground → lay flat the bucket → pull the hand brake → shut
down → release the pressure in the rotating bucket cylinder.

Removal steps:

Figures Operation instruction Tools

Warning: Refer to the
steps 3, 4 in Pressure
Release of Hydraulic system
for pressure relief of hydrau-
lic system.
1. Place an oil collecting con-
tainer under the bottom of Oil collecting
vehicle to prevent hydraulic container
oil from polluting ground;
2. Remove the bucket pin lubri-
cation line; remove the har-
ness line of front frame;

P18H00175

P18H00176
4-134
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

3. Hold the bucket cylinder with Lifting rope;
lifting rope and traveling
2T\4410lb
crane;
traveling crane
4. Loosen the hose plate bolt
connected with the steel
pipe of the small cavity oil
Open-end
port of the bucket cylinder,
wrench: 13mm
and remove the hose
P18H00177 assembly and shield the
hose joint.
5. Loosen the hose plate bolt
connected with the steel
pipe of the big cavity oil port
Open-end
of the bucket cylinder and
wrench: 13mm
remove the hose assembly
P18H00178 and shield hose joint.

6. Remove the fastening bolt of

the front and rear pin shaft
Copper bar;
of the bucket cylinder and
knock out the pin shaft with Open-end
a copper bar; wrench: 15mm
P18H00179

7. Lift out the bucket cylinder Lifting rope;

from the frame to place it on
2T\4410lb
a level ground.
traveling crane
8. Remove the bolts tightening
the steel pipe clamp and
steel pipe of big cavity of the Open-end
bucket cylinder and remove wrench: 13mm
the steel pipe; check Inner hexagon
whether the O-ring is aged wrench: 6mm,
P18H00180 or damaged and replace it in 8mm
time, mask the oil ports of
steel pipe.
9. Mask the big and small cav-
ity oil ports of the bucket cyl- Shielding film
inder to avoid pollution.
 4-135
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Installation of bucket cylinder

Figures Operation instruction Tools

1. Install the steel pipe of big
cavity of bucket cylinder and
tighten the bolt to 52±6Nm\
Open-end
38.4 ± 4.4lbf·ft; install the
wrench: 13mm
pipe clamp and tighten the
bolt to 52±6Nm\ Inner hexagon
38.4±4.4lbf·ft; wrench: 6mm,
P18H00181 8mm
Check whether the O-ring is
aged or damaged and replace it
in time
2. Hang the bucket cylinder to
Sling, 2T\4410lb
the mounting position with
traveling crane
sling.
3. Install the rear pin shaft of
bucket cylinder, and tighten
the pin shaft mounting bolt
Copper bar;
to 90±12Nm\ 66.4±8.9lbf·ft
Open-end
4. Install the front pin shaft of
wrench: 15mm
P18H00182 bucket cylinder, and tighten
the pin shaft mounting bolt
to 90±12Nm\ 66.4±8.9lbf·ft.
5. Connect the big and small
cavity hoses of bucket cylin-
der, tighten the plate bolt to
52±6Nm\ 38.4±4.4lbf·ft.

P18H00183
Open-end
wrench: 13mm

P18H00184
4-136
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

6. Install the proximity switch
wire harness line of bucket
cylinder.

P18H00185

7. Install the centralized lubri-

cation system joint.

P18H00186

8. Start the machine, and run it

at idle speed, slowly deploy
and retract the bucket for 3-
5 times to bleed the air in the
cylinder and line.
9. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-137
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Disassembly and assembly of bucket cylinder

Disassembly of bucket cylinder

Exploded view of bucket cylinder

17
16
15
11
12
11
9

20
2 21
19 3
18
4
10 6
8
14
7
13
8
2
3
4

1
22

23
24 P18H00187

1. Bushing 6. Bolt 11.Piston rod 16.Snap ring 21.Screw

2. Seal ring 7. Piston 12.Cylinder head 17.Y-seal 22.Steel ball
3. Cylinder block 8. Seal ring 13.Support ring 18.Dust ring 23.Sleeve
4. Cushion 9. Supporting ring 14.Seal 19.Spring retainer 24.Seal ring
5. Cover 10.O-ring 15.O-ring 20.Washer
4-138
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Removal steps:

Figures Operation instruction Tools

1. Loosen the 12 M16×70-
10.9-Zn.D bolts diagonally
(as shown by arrows in fig-
ure) with blower gun and
then remove them one by Blower gun
one together with washer. Link for
assembling
14mm hex bolt

P18H00188

2. Put one end of lifting rope

through the piston rod dual
lug (single lug for bucket cyl-
inder ) and fix it crosswise
with the other end on the lift-
ing equipment, and then
conduct slow, uniform and
vertical lifting, place the pis-
ton rod group horizontally on
special working position
Lifting
apparatus after it (see left
equipment
figure) separates from cylin-
der block completely. The Lifting rope
contact surface of working
position apparatus and the
cylinder shall be made of
soft material.
Note: Put clean cotton on the
P18H00189 contact surface of working
position apparatus and piston
rod to prevent the rod from
being scratched.
 4-139
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Fig. I 3. Fix the lug of piston rod
group, unscrew setscrew on
piston using inner hexagon
spanner and take out the
screw and steel ball (see left
picture in figure 1).
4. Assemble the tightening
tooling for piston in auxiliary
hole on the piston (see right
Setscrew+ste Auxiliary picture in figure 1), unscrew
P18H00190 piston using blower gun via Inner hexagon
Fig 2 tightening tooling, and then spanner: 6mm
remove the piston from pis-
Tightening
ton rod group along with
tooling for piston
axial direction of piston rod.
Blower gun
5. Install protective sleeve
matched with thread at small Thread
end of piston rod on the protective sleeve
threaded position (see Fig-
ure 2) and remove the cylin-
der head from piston rod
group along with axial direc-
tion of piston rod.
Note: the protective sleeve is
Thread P18H00191 used to prevent the seals from
being scratched when removing
the cylinder head from piston
rod).
4-140
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Inspection and cleaning of bucket cylinder

Figures Operation instruction Tools

Piston group:

Fig. I

Glyd ring squeezed

out and crashed
Inspection of part:
1. Inspection of piston group:
1) Inspection of piston seal:
a. Check whether glyd ring
Support ring is scratched, worn,
burned and damaged extruded and collapsed
P18H00192
(Figure 1 and Figure 2).
Fig 2 b. Check whether support
ring is scratched,
strained, worn and burnt
(Figure 1 and Figure 3).
c. Check whether O-ring at
static seal of piston is
worn and trimmed.
4) Inspection of piston:
Glyd ring shows wear a. Check whether contour of
while the wear is average
P18H00193 piston is scratched and
strained (Figure 4).
Figure 3
b. Check whether two end
surfaces are compressed
seriously (Figure 5).

Part of support ring The inner rings of 2# two support

(locking end) shows ring shows a round of wear
vertical scratch
P18H00194
 4-141
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Fig 4

Outer circle of piston

shows scratch
P18H00195

Fig 5

End surface of
piston shows imprint

P18H00196
4-142
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Cylinder head assembly: 2. Inspection of cylinder head
assembly:
Fig. I
1) Inspection of cylinder head
seal:
Support ring
has paint a. Check whether the dust
cover is scratched, worn
and damaged.
b. Check whether Y-seal is
scratched, worn, dam-
aged and burnt.
c. Check whether support
P18H00197 ring is scratched,
strained, worn, burnt and
Figure 2 attached with foreign mat-
ter. (Figure 1)
d. Check whether the buffer
ring is worn and dam-
aged.
e. Check whether O-ring at
static seal of cylinder
head is worn and
Cylinder head inner trimmed.
hole has leaning wear
P18H00198 6) Inspection of cylinder head:
a. Check whether the cylin-
der head bore is
scratched, strained and
eccentrically worn (Fig-
ure 2).
b. Check each part of cylin-
der head for crack.
 4-143
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Piston rod: 3. Inspection of piston rod:

Fig. I a. Check whether the piston

rod body (chrome plated
One draw mark crosses through area) is bumped,
the chrome plated area scratched, rusted and
dechromed (Figure 1).
b. Check whether the thread
at small end of piston rod
is rusted and damaged
(mess thread) (Figure 2).
c. Check whether small end
P18H00199
contour of piston rod is
rusted. Figure 3
Figure 2

Thread
has 174mm
damaged part

P18H00200

Figure 3

Small head
outer ring rusts

Rod shoulder
guide ring rusts P18H00201
4-144
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Cylinder block: 4. Inspection of cylinder block:

Fig. I a. Check inner wall of cylin-

der block for score or
scratch (Figure 1).
Cylinder score & scratch is distinct
b. Check whether the flange
thread is damaged (mess
thread).
c. Check whether the bush-
ing of cylinder head is
eccentrically worn and
cracked (Figure 2).
P18H00202

Figure 2

Bushing has leaning

wear & cranks

P18H00203

Cleaning of part:
Clean cylinder block, piston
rod, cylinder head and piston
using kerosene and detergent,
and then dry all parts with
compressed air.
 4-145
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Assembly of bucket cylinder

Figures Operation instruction Tools

Assembly of piston group: 1. Assembly of piston group
(assembly of seal): clean the
Fig. I piston, and then place it hor-
izontally on the assembly
stand.
a. Press the inner ring
(square ring) of glyd ring
into the middle groove
(figure 1) with special tool- Assembling
ing and then separate the tooling for glyd
Square ring
outer ring (with opening) ring
of glyd ring by hands and
assemble it to the outside
of square ring.
b. Separate the supporting
ring (with opening) by
hands and assemble it to
the groove of supporting
P18H00204 ring.
4-146
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Assembly of cylinder head assembly: 2. Assembly of cylinder head 1. Assembling
assembly (assembly of tooling for
seal): dust ring
1 a. Clean the cylinder head,
2 and place it on the
assembly stand as shown
in figure 1 (dust ring side
3 faces upward).
4 b. As shown in Figure 2,
assemble Y-ring into
green groove (shown in
Figure 1) with dual lip of
5 Y-ring facing downwards
(facing to the support
ring).
c. Press dust ring metal
frame excircle vertically
1. Pink: groove of dust ring
into pink groove (shown in
2. Green: groove of Y-ring Figure 1) with special tool-
3. Red: groove of support ring ing (shown in Figure 3)
4. Blue: groove of buffer ring with dual lip of dust ring
5. Groove of O-ring facing downwards (facing
P18H00205
to the support ring).
d. Turn over the cylinder
head with the dust ring
facing downwards.
e. Press the supporting ring
(with opening) slightly by
hands and install it to the
red groove shown in fig-
ure 1.
f. Install the O-ring of buffer
ring (formed by O-ring
and seal ring) to the blue
P18H00206 groove shown in figure 1
and then install the seal
ring to the outside of O-
ring.
g. Install the O-ring and
snap ring to the groove of
O-ring.
 4-147
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

P18H00207
4-148
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

Assembly of piston rod group 3. Assembly of piston rod
group:
Fig. I
a. Fix the lug (boom cylin-
der: dual-lug, bucket cyl-
inder: single lug) of piston
rod on the special tooling
to make it not rotate.
b. Put the thread protective
sleeve (red ring in figure
1) on the thread at small
end of piston rod to avoid
P18H00208 scratching the seal.
Figure 2 c. Apply clean hydraulic oil
on the surface of piston Fixing tooling for
rod and push the cylinder piston rod
head (dust ring side fac- Thread
ing towards the rod head) protective sleeve
into the rod body (green
ring in figure 1) along with Blower gun
axial direction of piston Tightening
rod. tooling for piston
d. Remove the thread pro- Inner hexagon
P18H00209
tective sleeve. wrench: 6mm
e. Install the piston to the
small end of piston rod
with the tightening tooling
for piston and then tighten
it with blower gun (figure
2).
f. Install the steel ball into
the threaded hole of the
piston.
g. Screw the setscrew to the
threaded hole of the pis-
ton with inner hexagon
spanner.
 4-149
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

Fig. I 4. Assembly of oil cylinder
assembly:
a. Fix the cylinder block on
the assembly stand (fig-
ure 1) to make it not
rotate, apply clean
hydraulic oil to the inner
chamber of cylinder block
about 300mm\11.8in from
top to bottom.
b. Lift the piston rod group
with sling and apply clean
hydraulic oil to the excir-
cle of piston, then install it Lifting rig
to the cylinder block verti-
Lifting rope
cally along with the axis of
P18H00210 inner chamber of cylinder Blower gun
block.
c. Screw 12 M16×70-10.9-
Zn.D screws to the
threaded hole (screwed
for at least 5 threads) by
hands, then tighten the
screws to the range
267±45Nm\196.9±33.2lbf·
ft one by one diagonally
with blower gun.
d. Seal the big and small
cavity of oil port with spe-
cial cap.
4-150
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Removal and installation of control valve

Removal of control valve

Removal steps:

Figures Operation instruction Tools

Before removing, release
system pressure, support the
boom firmly and fix the bucket
1. Screw off the 4 fastening
bolts of the cover plate at
the access port of the con-
trol valve of the front frame
and remove the cover plate;

Open-end
wrench: 10mm

P18H00211

2. Mark the symbols: "X1-

boom big cavity linkage
pilot", "X2-boom small cavity
linkage pilot", "X3-bucket big
cavity linkage pilot", "X4-
bucket small cavity linkage
pilot" , "X5-multi-functional
big cavity linkage pilot", "X6- Open-end
multi-functional small cavity wrench: 19mm
linkage pilot" respectively on
the pilot hose connected to
the control valve; the marks
shall be firm.
P18H00212 3. Remove these 6 hoses
together; mask oil ports;
 4-151
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

4. Remove the control valve
LS, oil return port, boom big
and small cavity, bucket big
and small cavity, multi-func-
tional linkage big and small
cavity oil port joint and mask
oil ports, as shown in the fig- Open-end
ure; wrench: 17, 32,
41, 44, 46mm

P18H00213

5. Remove the oil inlet joint of

control valve and mask the
oil ports, as shown in the fig-
ure;

Open-end
wrench: 44mm

P18H00214

6. Tie the control valve assem-

Lifting rope
bly with lifting rope;
4-152
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

7. Unscrew the 4 fastening
bolts, nuts from control valve
and place it together with the
bolts, nuts.

Open-end
wrench:
15mm.

P18H00215

8. Lift the control valve slowly

and levelly and move out
Lifting rope,
from the access port of the
crane
control valve of the front
frame slowly;
9. Place the control valve on
the ground; remove the tran-
sition joint, mounting plate
installed on the valve body
and mask oil ports of control
valve.

Open-end
wrench: 13, 19,
41mm

P18H00216
 4-153
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

P18H00217
4-154
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Installation of control valve

Figures Operation instruction Tools

1. Install the transition joint,
mounting plate to the control
valve, check whether the O-
ring is aged or damaged and
replace it in time, tightening
torque for bolts on mounting
plate: 52±6Nm\
38.4±4.4lbf·ft

P18H00218
Open-end
wrench: 13, 19,
41mm

P18H00219

2. Hang the control valve to the

mounting position with Lifting rope
proper sling.
 4-155
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

3. Install the control valve fas-
tening bolts and nuts with
the torque of 90±10Nm\
66.4±7.4lbf·ft

Open-end
wrench: 15mm

P18H00220

4. Connect the multi-functional

small cavity hose, tighten
the hose joint to 89 ± 4Nm\
65.6 ± 3.0lbf·ft

Open-end
wrench: 32mm;

P18H00221

5. Connect the multi-functional

big cavity hose, tighten the
hose joint to 89 ± 4Nm\ 65.6
± 3.0lbf·ft

Open-end
wrench: 32mm;

P18H00222
4-156
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

6. Connect the boom small
cavity hose, tighten the hose
joint to 179±8Nm\
132±5.9lbf·ft

Open-end
wrench: 41mm

P18H00223

7. Connect the boom big cavity

hose, tighten the hose joint
to 179±8Nm\ 132±5.9lbf·ft

Open-end
wrench: 41mm

P18H00224

8. Connect the bucket small

cavity hose, tighten the hose
joint to 179±8Nm\
132±5.9lbf·ft

Open-end
wrench: 44mm

P18H00225
 4-157
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

9. Connect the bucket big cav-
ity hose, tighten the hose
joint to 179±8Nm\
132±5.9lbf·ft

Open-end
wrench: 41mm

P18H00226

10. Connect the oil return hose

of the control valve, tighten
the hose joint to 226±11Nm\
166.7±8.1lbf·ft

Open-end
wrench: 41mm

P18H00227

11. Connect the LS hose,

tighten the hose joint to
16±1Nm\ 11.8±0.74lbf·ft

Open-end
wrench: 17mm

P18H00228
4-158
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

12. Connect the oil inlet hose of
the control valve, tighten the
hose joint to 179±8Nm\
132±5.9lbf·ft

Open-end
wrench: 44mm

P18H00229

13. Connect the pilot hose to the

control valve by the symbols
during removal: "X1-boom
big cavity linkage pilot", "X2-
boom small cavity linkage
pilot", "X3-bucket big cavity
linkage pilot", "X4-bucket Open-end
small cavity linkage pilot" , wrench: 19mm
"X5-multi-functional big cav-
ity linkage pilot", "X6-multi-
functional small cavity link-
age pilot".

P18H00230

14. Fill the hydraulic oil, start the

machine and idle it for 5min
15. Tilt back and dump the
bucket, raise and lower the
boom slowly for at least 10
times to bleed the air in the
line.
16. Stop the machine and check
it for leakage.
17. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-159
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Removal and installation of pilot valve assembly

Removal of pilot valve assembly

Removal steps:

Figures Operation instruction Tools

Before removal, release the

system pressure, place the
boom at the lowest position, and
place the bucket flatwise on the
ground.

P18H00231

1. Turn the pilot shut-off valve

to the off-position (vertical
position);
Note: When turning the handle
to the vertical position, the work
implement will not work when
the driver operates the pilot
lever of the work implement.
Thus it can prevent mis-
operation of the control lever of
the work implement from
causing accidents.

P18H00232
4-160
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

2. Remove the upper and
lower cover plate from the
handrail group by referring
to the Console Overhaul
Manual;
1

On-position

2
1. Upper cover plate
2. Lower cover plate
P18H00233

3. Please mark the hose

assembly connected to the
pilot valve and shut-off valve
respectively with: "P_oil
inlet", "T_return oil",
"X1_raising", "X2_lowering",
"X3_bucket tilt-back",
"X4_dumping"; the marks
Open-end
should be firm.
wrench: 17,
4. Remove the above hose 24mm
assembly; mask oil ports;
1 5
1. X1-Raise
2. X3-Bucket tilting back
3. T-Oil return 2
4. X2-Lowering
5. X4-Dumping 6
3
6. P-Oil inlet P18H00234
4
 4-161
January 24, 2017 Removal and Installation
CLG835H Work hydraulic system

Figures Operation instruction Tools

5. Unscrew off the 4 tightening
bolts of the pilot valve
mounting board;

Open-end
wrench: 8mm

P18H00235

6. Remove the pilot valve from

the right console and place it
on the ground; mask the oil
ports. Remove the joint,
mounting plate from the pilot
valve and place them well to
spare.

Installation of pilot valve assembly

Figures Operation instruction Tools

1. Install the joint, mounting
plate to the pilot valve.
2. Install the pilot valve to the
mounting bracket of con-
sole from top to bottom, and
tighten the mounting bolt to
10.5±1.5Nm\ 7.7±1.1lbf·ft

Open-end
wrench: 8mm

P18H00236
4-162
Removal and Installation January 24, 2017
Work hydraulic system CLG835H

Figures Operation instruction Tools

3. Connect the hose by the
symbols: "P_oil inlet",
"T_return oil", "X1_raising",
"X2_lowering", "X3_bucket
tilt-back", "X4_dumping";
tightening torque for
"T_return oil" is: 37±2Nm\
27.3±1.5lbf·ft, while the oth-
Open-end
ers: 16±1Nm\
wrench: 17,
11.8±0.74lbf·ft;
24mm

1 5
1. X1-Raise
2. X3-Bucket tilting back
3. T-Oil return 2
4. X2-Lowering
5. X4-Dumping 6
3
6. P-Oil inlet P18H00234
4

4. Fill the hydraulic oil, start the

machine and idle it for 5min;
5. Tilt back and dump the
bucket, raise and lower the
boom slowly for at least 10
times to bleed the air in the
line;
6. Stop the machine and check
it for leakage.
7. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-163
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

8. Install the upper and lower
cover plate to the handrail
group by referring to the
Console Overhaul Manual;
1

On-position

1. Upper cover plate 2

2. Lower cover plate P18H00238

Steering hydraulic system

Removal and installation of metering pump

Removal of metering pump Removal steps

Figures Operation instruction Tools

1. Mark hoses installed on the
metering pump as: "T_ oil
return pipe of metering
pump", "P_ oil inlet pipe of
metering pump", "L_ left
steering pipe", "R_ right
steering pipe" and "LS_ LS
Marker:
pipe of metering pump", the
marks shall be clear, firm Open-end
and shall not fall off. wrench: 17, 32,
36mm
2. Remove hoses at T, P, L, R
and LS ports of metering
pump and mask oil ports;

T P L R LS
P18H00239
4-164
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

3. Remove the joints installed
on metering pump and
shield the oil port of meter-
ing pump.

Open-end
wrench: 17, 27,
32mm

P18H00240

4. Remove captive bolts of

metering pump on steering
column of cab and take out
the metering pump.

Open-end
wrench: 13mm

P18H00241
 4-165
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Installation of metering pump

Figures Operation instruction Tools

1. Install 4 captive bolts of
metering pump and tighten-
ing torque is 52±7Nm\
38.4±5.2lbf·ft.

Open-end
wrench: 13mm

P18H00242

2. Install T\P\R\L port joints of

metering pump and tighten-
ing torque is 80±12Nm

P18H00243
4-166
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

3. Install LS port joint and tight-
ening torque is 35±5Nm

P18H00244

4. Connect hose: "T_ oil return

pipe of metering pump" and
tightening torque is
116±5Nm
5. Connect hoses: "P_ oil inlet
pipe of metering pump", "L_
left steering pipe" and "R_
right steering pipe" and tight-
ening torque is 89±4Nm\
65.6±2.95lbf·ft
6. Connect hose: "LS_ LS pipe
of metering pump" and tight-
T P
ening torque is 16±1Nm\
L R LS
11.8±0.74lbf·ft
P18H00245

7. Fill the hydraulic oil, start the

machine and idle it for 5min;
8. Turn slowly for at least 10
times and bleed the air in
the line.
9. Stop the machine and check
it for leakage.
10. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-167
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Removal and installation of priority valve

Removal of priority valve

Removal steps

Figures Operation instruction Tools

1. Mark hoses installed on the
priority valve as T, P, LS, CF
and EF, which shall be clear,
firm and shall not fall off;

Marker:

P18H00246

2. Loosen the CF, LS, T hoses

joints with a open-end
wrench and remove the
hose joints by gentle knock-
down, mask the oil ports;
Open-end
wrench: 17,
32mm

P18H00247

3. Remove flange bolts of P

port and EF port and mask
oil ports;

Open-end
wrench: 13m

P18H00248
4-168
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

4. Remove bolts on mounting
plate of priority valve and
captive bolts of priority Open-end
valve, take out the priority wrench: 15,
valve and place it in a clean 18mm
container.
Inner hexagon
spanner: 10mm
P18H00249

Installation of priority valve

Figures Operation instruction Tools

1. Install priority valve on fixing
plate and tightening torque
of bolts is 90±12Nm\6
6.4±8.9lbf·ft
2. Install priority valve on lug of
rear frame and tightening
torque of bolts is 90±12Nm\
66.4±8.9lbf·ft
P18H00250

3. Connect hoses of P port and

EF port and tightening
torque of bolts is 72±6Nm\
53.1±4.4lbf·ft

Open-end
wrench: 13m

P18H00251
 4-169
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

4. Connect hoses of T port and Open-end
LS port and the tightening wrench: 17,
torque of hose joint is 32mm
16±1Nm\ 11.8±0.74lbf·ft
5. Connect hoses of CF port
and the tightening torque of
hose joint is 89±4Nm\
65.6±2.95lbf·ft

P18H00252

6. Fill the hydraulic oil, start the

machine and idle it for 5min;
7. Turn slowly for at least 10
times and bleed the air in
the line.
8. Stop the machine and check
it for leakage.
9. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
4-170
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Removal and installation of steering cylinder

Removal of steering cylinder

Place the machine in horizontal hard ground →lay flat the bucket →pull the hand brake →shut
down→fix the front and rear frame by bumper.

Removal steps (Take right steering cylinder as example, and the removal steps of left steering cylinder is
the same)

Figures Operation instruction Tools

1. Loosen and remove plate
bolts of big cavity of steering
cylinder by wrench and
mask the oil ports.

Open-end
wrench: 13mm

P18H00253

2. Loosen the hose joint of

small cavity of steering cylin-
der by wrench and remove
the hose joint by gentle
knockdown; mask the oil
ports. Open-end
wrench: 27mm

P18H00254
 4-171
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

3. Remove the tightening bolt
of rear pin shaft of steering
cylinder and knock out the
pin shaft by copper bar;

Copper bar;
Open-end
wrench: 15mm

P18H00255

4. Tie the steering cylinder with

lifting rope, remove the tight-
ening bolt of front pin shaft
of steering cylinder and
knock the pin shaft out with
copper bar.
Copper bar;
Open-end
wrench: 15mm

P18H00256

5. Lift the steering cylinder out Lifting rope;

of the frame using traveling
crane and place it on a level 2t\4410lb
ground. traveling crane
6. Mask the big and small cav-
ity oil ports of the steering Shielding film
cylinder to avoid pollution.
4-172
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Assembly of steering cylinder

Figures Operation instruction Tools

1. Hang the steering cylinder to Lifting rope;
the mounting position with
2t\4410lbtravelin
proper sling.
g crane
2. Install the front pin of steer-
ing cylinder and tighten the
pin shaft captive bolt to
90±12Nm\ 66.4±8.9lbf·ft

Copper bar;
Open-end
wrench: 15mm

P18H00257

3. Install the rear pin of steer-

ing cylinder and tighten the
pin shaft captive bolt to
90±12Nm\ 66.4±8.9lbf·ft

Copper bar;
Open-end
wrench: 15mm

P18H00258
 4-173
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

4. Connect the small cavity
hose of steering cylinder
with the tightening torque of
hose joint 47±2Nm\
34.7±1.5lbf·ft
Open-end
wrench: 27mm

P18H00259

5. Connect big cavity plate of

steering cylinder with the
tightening torque of bolts
72±6Nm\ 53.1±4.4lbf·ft

Open-end
wrench: 13mm

P18H00260

6. Fill the hydraulic oil, start the

machine and idle it for 5min;
7. Turn slowly for at least 10
times and bleed the air in
the line.
8. Stop the machine and check
it for leakage.
9. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
4-174
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Disassembly and assembly of steering cylinder

Disassembly of steering cylinder

Exploded view of steering cylinder

20

21

20
2
6 5

3 7
4 13
8 23
22

16
14
20 14 15

10 9
21 11
12

20
17 18 19
P18H00261

1. Piston rod 9. Plug 17.Cushion

2. Dust ring 10.O-ring 18.Cover
3. Cylinder head 11.Plug 19.Bolt
4. O-ring 12.Cylinder block 20.Stopper
5. Y-seal 13.O-ring 21.Knuckle bearing
6. Seal ring 14.Support ring 22.Screw
7. Supporting ring 15.Glyd ring 23.Steel ball
8. O-ring 16.Piston
 4-175
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Removal steps

Figures Operation instruction Tools

1. Fix the cylinder on assembly
stand using pin shaft hole of
cylinder head so that it can
not turn.
2. Install boosting rod on hook
spanner and unscrew cylin-
der head anticlockwise as
shown in the figure. Hook spanner
Copper bar
Boosting rod

P18H00262

3. Put one end of lifting rope

through the piston rod lug
and fix it crosswise with the
other end on the lifting
equipment, and then con-
duct slow, uniform and verti-
cal lifting, place the piston
rod group horizontally on
special working position
apparatus after it (see left
figure) separates from cylin-
Lifting
der block completely (Note:
equipment
the contact surface of work-
ing position apparatus and Lifting rope
the cylinder shall be made of
soft material.

P18H00263 Note: the contact surface of

working position apparatus and
the cylinder shall be made of
soft material. Put clean cotton
on the contact surface of
working position apparatus and
piston rod to prevent the rod
from being scratched.
4-176
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

Figure 1 4. Fix the lug of piston rod
group, unscrew setscrew on
piston using inner hexagon
spanner and take out the
screw and steel ball. (see
Figure 1-left)
5. Assemble the tightening
tooling for piston in auxiliary
Auxiliary hole P18H00264
hole on the piston (see right
Setscrew+steel ball
one of left Figure), unscrew
Figure 2 piston using blower gun via Inner hexagon
tightening tooling, and then spanner: 4mm
remove the piston from pis-
Tightening
ton rod group along with
tooling for piston
axial direction of piston rod.
Blower gun
6. Install protective sleeve
matched with thread at small Thread
end of piston rod on the protective sleeve
threaded position (see Fig-
ure 2) and remove the cylin-
der head from piston rod
group along with axial direc-
Thread protective sleeve
tion of piston rod.
P18H00265
Note: the protective sleeve is
used to prevent the seals from
being scratched when removing
the cylinder head from piston
rod).
 4-177
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Inspection and cleaning of steering cylinder

Figures Operation instruction Tools

Piston group picture: Cleaning of part:

Figure 1 Clean cylinder block, piston rod,

cylinder head and piston using
kerosene and detergent, and
then dry all parts with
compressed air.

Inspection of part:

Friction ring outer circle 1. Inspection of piston group:

has scratch
1) Inspection of piston seal:
a) Check whether glyd ring
is scratched, worn,
extruded and collapsed
(Figure 1).
Friction ring outer circle has scratch,
and one side angle has defects b) Check whether support
ring is scratched,
strained, worn and burnt
(Figure 2).
c) Check whether O-ring at
static seal of piston is
worn and trimmed.
O-ring surface shows
roughness and wear
2) Inspection of piston:
P18H00266
a) Check whether contour
Figure 2 of piston is scratched
Complete ring outer and strained (Figure 3).
circle grows black
b) Check whether two end
surfaces are com-
pressed seriously.

With light wear and scratch partially P18H00267

4-178
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

(Figure 3)

Outer circle of piston

shows scratch P18H00268
 4-179
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

Cylinder head assembly: 2. Inspection of cylinder head
assembly:
Figure 1
1) Inspection of cylinder head
seal:
a. Check whether the dust
ring is scratched, worn
Dust ring circle hole has and damaged (figure 1).
vertical scratch partially
P18H00269 b. Check whether Y-seal is
scratched, worn, dam-
Figure 2 aged and burnt (figure 2).
c. Check whether seal is
scratched, worn, dam-
aged and collapsed (Fig-
ure 3).
3 Deep and vertical Outer ring has
scratches are found radial wear d. Check whether support
ring is scratched, worn,
P18H00270 burnt and attached with
Figure 3 foreign matter.
e. Check whether O-ring at
static seal of cylinder
head is worn, trimmed
and burnt.

Inner ring of Stepseal friction

ring has vertical scratch partially

Inner and outer

surface wears lightly
P18H00271
4-180
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

Figure 4 6) Inspection of cylinder
head:
a. Check whether the cylin-
der head bore is
scratched, strained and
eccentrically worn.
Inner circle b. Check whether the thread
grows black
of cylinder head is dam-
aged (mess thread) (Fig-
ure 5).

Support ring (dust ring end) Inner circle grows black and
outer circle grows black has vertical scratch partially
P18H00272

Figure 5

Cylinder head threads are

squeezed and damaged P18H00273

Piston rod: 3. Inspection of piston rod:

a. Check whether the piston
rod body (chrome plated
area) is bumped,
scratched, rusted and
dechromed (Left figure).
b. Check whether the thread
Two vertical scratches at small end of piston rod
on chrome plated area P18H00274 is rusted and damaged
(mess thread).
c. Check whether knuckle
bearing of rod head is
damaged.
 4-181
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

Figure 1 4. Inspection of cylinder block:
a. Check inner wall of cylin-
der block for score or
One scratch (Figure 1).
transverse b. Check thread in cylinder
scratch in the block for burr or damage
(mess thread).
P18H00275
c. Check whether knuckle
Figure 2 bearing of cylinder head is
damaged.
d. Check oil port surface of
big & small cavity for
P18H00276 scratches (affecting seal-
ing) and oil port thread for
damage.
Cleaning of part:
Clean cylinder block, piston rod,
cylinder head and piston using
kerosene and detergent, and
then dry all parts with
compressed air.
4-182
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Assembly of steering cylinder

Figures Operation instruction Tools

Assembly of piston group: 1. Assembly of piston group
(assembly of seal):
Figure 1
a. Clean the piston, and
then place it horizontally
on the assembling stand.
b. Press the inner ring of gly-
ding (O-ring) into the mid-
dle groove using special
tooling (Figure I), and Assembling
Square ring then assemble the outer tooling for glyd
ring at the outside of O- ring
ring with tooling.
c. Separate the support ring
by hand (with opening)
and assemble it into its
groove.

P18H00277
 4-183
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

Assembly of cylinder head assembly: 1. Assembly of cylinder head
assembly (assembly of
Figure 1 seal):
1 a. Clean the cylinder head,
and place it on the
2 assembly stand as shown
5 3 in figure 1 (dust ring side
faces upward).
4 b. As shown in Figure 2,
assemble Y-ring into
green groove (shown in
Figure 1) with dual lip of
1. Pink: groove of dust ring 4. Blue: groove of buffer ring Y-ring facing downwards
2. Green: groove of Y-ring 5. Groove of O-ring
3. Red: groove of support ring (facing to the support
P18H00278
ring).
Figure 2 c. Assemble dust ring into
pink groove (shown in
Figure 1) with dual lip of
dust ring facing down-
wards (facing to the sup- Assembling
port ring) using the same tooling for dust
method of assembling Y- ring
ring.
d. Turn over the cylinder
head with the dust ring
facing downwards.
P18H00279 e. Press the supporting ring
(with opening) slightly by
hands and install it to the
red groove shown in fig-
ure 1.
f. Install the O-ring of buffer
ring (formed by O-ring
and seal ring) to the blue
groove shown in figure 1
and then install the seal
ring to the outside of O-
ring.
g. Assemble the O-ring into
its groove.
4-184
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

Assembly of piston rod group 2. Assembly of piston rod
group:
Figure 1
a. Fix the lug of piston rod
on special tooling so that
it can not turn.
b. Put the thread protective
sleeve (red ring in figure
1) on the thread at small
end of piston rod to avoid
scratching the seal.
P18H00280 c. Apply cleaning hydraulic
Fixing tooling for
oil on the surface of piston
Figure 2 piston rod
rod and push the cylinder
head (the side with dust Thread
ring facing rod head) into protective sleeve
rod body (green ring
Blower gun
shown in Figure I) along
with axial direction of pis- Tightening
ton rod. tooling for piston
d. Install the piston to the Inner hexagon
P18H00281 small end of piston rod spanner: 4mm
with the tightening tooling
for piston and then tighten
it with blower gun (figure
2).
e. Install the steel ball into
the threaded hole of the
piston.
f. Screw the setscrew to the
threaded hole of the pis-
ton with inner hexagon
spanner.
 4-185
January 24, 2017 Removal and Installation
CLG835H Steering hydraulic system

Figures Operation instruction Tools

Figure 1 3. Assembly of oil cylinder
assembly:
a. Fix the cylinder block on
assembly stand so that it
can not turn (As shown in
Figure I and Figure II) and
apply cleaning hydraulic
oil on inner cavity of cylin-
der block within the area
of 300mm\ 11.8in from up
to down.
b. Lift the piston rod group
with sling and apply clean Lifting rig
hydraulic oil to the excir- Lifting rope
cle of piston, then install it
to the cylinder block verti- Hook spanner
cally along with the axis of Copper bar
P18H00282 inner chamber of cylinder
block. Boosting rod
c. Tighten the cylinder head
clockwise using hook
spanner and knock the
hook spanner with cop-
per bar, and then install
boosting rod on the hook
spanner to tighten the cyl-
inder continuously (Fig-
ure II) to make tightening
torque of cylinder head
thread reach 332±20Nm\
244.9±14.8lbf·ft.
4-186
Removal and Installation January 24, 2017
Steering hydraulic system CLG835H

Figures Operation instruction Tools

Figure 2 d. Knock the locking edge of
cylinder block into 4
square grooves of cylin-
der head using a punch
(with one sharp end and
one blunt end) in the
arrow direction shown in
Figure III (effect: locking).
e. Seal the big and small
cavity of oil port with spe-
cial cap.

P18H00283

Figure 3

P18H00284
 4-187
January 24, 2017 Removal and Installation
CLG835H Brake system

Brake system

Removal and installation of brake pump

Removal of brake pump

Removal steps:

Refer to Installation Position and Functional

Structure to release the pressure of service
brake system and parking brake system
before removing the brake pump.

Since the brake pump is an integrated tandem

pump with cooling pump, its removal steps are
same as that of cooling pump.

Assembly of brake pump

Its installation steps are same as that of cooling

pump.

Removal and installation of brake valve

Removal of brake valve

Removal steps:

Refer to “Pressure Release of Hydraulic sys-

tem” to release the pressure of service brake
system and parking brake system before
removing the brake valve.
4-188
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

Remove the brake light switch
or clutch on/off switch in the
P2 P1 electrical system
T
F1 1. Mark the 5 hoses connect-
F2 ing brake valve as P1, P2,
Open-end
F1, F2, T respectively. Pay
wrench: 22mm
attention to that the mark-
ings shall be firm.
P18H00285 2. Remove the joints of 5
hoses and shield the oil
ports;
3. Unscrew the 4 bolts tighten-
ing the brake valve in the
cab;

Open-end
wrench: 13mm

P18H00286

4. Take out the brake valve

from the bottom of cab;
5. Shield the port of brake
valve and store it in dry and
clean place.
 4-189
January 24, 2017 Removal and Installation
CLG835H Brake system

Installation of brake valve

Figures Operation instruction Tools

1. Install the brake valve onto
the cab floor from the bot-
tom, tighten the bolt. Tight-
ening torque of bolt:
52±6Nm\ 38.4±4.4lbf·ft;

Open-end
wrench:
13mm

P18H00287

2. Tighten hose joints T, F2,

F1, P1 and P2 with tighten-
P2 P1 T ing torque 37±2Nm\
F1 27.3±1.5lbf·ft;
F2
3. Connect the brake light Open-end
switch and clutch on/off wrench: 22mm
switch well in the electrical
system by referring to Elec-
P18H00288
trical System Overhaul Man-
ual.
4-190
Removal and Installation January 24, 2017
Brake system CLG835H

Disassembly and assembly of brake valve

Disassembly of brake valve

Figures Operation instruction Tools

1. Take out cotter pin and two
cross pins

Wire cutter

P18H00289

2. Take down torsional spring

P18H00290
 4-191
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

3. Take down dust cover

P18H00291

4. Unscrew 4 hex bolts using

inner hexagon spanner and
take down the plate

Inner hexagon
spanner:

P18H00292
4-192
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

5. Unscrew spool group using
36# open-end wrench

36# Open-end
wrench

P18H00293

6. Take out the spool group

and gaskets on the group

P18H00294
 4-193
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

7. Take out two spools

P18H00295

8. Turn over the valve body

and remove hex head plug
from its bottom

Inner hexagon:

P18H00296
4-194
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

P18H00297

9. Push lightly spool and spring

out of the other end using
inner hexagon wrench

P18H00298

P18H00299
 4-195
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

10. Inner components of brake
valve are shown in the Fig-
ure

P18H00300

Inspection and cleaning of brake valve

The valve body and spool can be used if there are no obvious scratches, dents and corrosions on their
surfaces by visual inspection. The components needed to be reassembled shall be cleaned in detergent
(Loctite 755 detergent is recommended)

The cleaned components shall touch hydraulic oil before reassembly;

Figures Operation instruction Tools

1. Clean all parts needed to be
assembled

Use Loctite 755

detergent

P18H00301
4-196
Removal and Installation January 24, 2017
Brake system CLG835H

Assembly of brake valve

Figures Operation instruction Tools

1. Refer to left figure for inner
components of brake valve

P18H00302

2. Install spring and spool as

shown in the figure

P18H00303

P18H00304
 4-197
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

3. Mounting torque of hex head
plug: 13NM\ 9.6lbf

Inner hexagon
spanner:

P18H00305

4. Take over the valve body

and install two spools (pay
attention to the direction of
spools)

P18H00306
4-198
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

5. Stick the gasket onto valve
group using grease

P18H00307

6. Install the spool group into

valve body

P18H00308
 4-199
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

7. Tighten the spool group
using 36# open-end wrench
with torque 50NM\ 36.9lbf·ft

36# Open-end
wrench

P18H00309

8. Install the plate and 4 hex

bolts with tightening torque
10 NM\ 7.4lbf·ft

Inner hexagon
spanner

P18H00310
4-200
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

9. Install dust cover

P18H00311

10. Install torsional spring, cross

pin and cotter pin

Wire cutter

P18H00312
 4-201
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

P18H00313

P18H00314

Users can not remove and install the internal parts of brake valve on their own without authoriza-
tion of manufacturer POCLAIN, otherwise, POCLAIN will not be liable for the service of quality
assurance.
4-202
Removal and Installation January 24, 2017
Brake system CLG835H

Removal and installation of charge valve

Removal of charge valve

Removal steps:

Refer to Installation Position and Functional Structure to release the pressure of service brake
system and parking brake system before removing the charge valve.

Figures Operation instruction Tools

1. Mark 6 hoses connecting
T with charge valve respec-
tively as T, P, S, B3, A1, A2
P
and note that markings shall
S be firm;
2. Loosen the joints of 5 hoses
and mask the oil ports;
Open-end
wrench: 17, 24,
27mm

A2
B3

A1
P18H00315
 4-203
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

3. Unscrew the 3 bolts tighten-
ing the charge valve;

Open-end
wrench:
8mm

P18H00316

4. Take the charge valve out of

left housing;
5. Shield the joint of charge
valve and store it in dry and
clean place.

Installation of charge valve

Figures Operation instruction Tools

1. Tighten bolts, install the
charge valve onto the
mounting plate of left box,
tightening torque of bolts:
10.5±1.5Nm\ 7.7±1.1lbf·ft;

Open-end
wrench:
8mm

P18H00317
4-204
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

2. Assemble joints marked with
A2, A1 and B3 and tighten
the joints with torque
37±2Nm\ 27.3±1.5lbf·ft;

Open-end
wrench:
24mm

P18H00318

3. Assemble joints marked with

P and S and tighten the
joints with torque 47±2Nm\
34.7±1.5lbf·ft;

Open-end
wrench:
27mm

P18H00319

4. Assemble joint marked with

T and tighten the joint with
torque 16±1Nm\
11.8±0.74lbf·ft;

Open-end
wrench:
17mm

P18H00320
 4-205
January 24, 2017 Removal and Installation
CLG835H Brake system

Disassembly and assembly of charge valve

Disassembly of charge valve

Figures Operation instruction Tools

1. Fix the charge valve using
vise

P18H00321

2. Remove the plastic plugs

using straight screwdriver in
sequence (P, T, A1, A2, B3
and S);

Cross
screwdriver

P18H00322
4-206
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

3. Remove the charge valve
spool using 30# hexagon
socket wrench and note that
the O-ring shall return to
spool after removing the
spool (three layers of O-
rings)
30 hexagon
socket wrench

P18H00323

P18H00324
 4-207
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

4. Open the plug of switching
spool using large straight
screwdriver (special tool);

P18H00325

P18H00326
4-208
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

5. Remove spring gasket and
take out two springs and
gaskets under springs (take
out the components in
sequence shown in the fig-
ure)

P18H00327

P18H00328
 4-209
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

P18H00329

6. Remove small metal plug at

upper end using 6# inner
hexagon spanner and
remove large metal plug at
secondary layer with 32#
open-end wrench (or socket
wrench); take out long rod
spool by hand and attract
small steel ball using mag- 6# Inner
netized screwdriver; hexagon
spanner

P18H00330
4-210
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

32# Open-end
wrench

P18H00331

P18H00332
 4-211
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

P18H00333

P18H00334
4-212
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

P18H00335

P18H00336
 4-213
January 24, 2017 Removal and Installation
CLG835H Brake system

Inspection and cleaning of charge valve

The valve body and spool can be used if there are no obvious scratches, dents and corrosions on their
surfaces by visual inspection. The components needed to be reassembled shall be cleaned in detergent
(Loctite 755 detergent is recommended)

The cleaned components shall touch hydraulic oil before reassembly;

Figures Operation instruction Tools

Clean all parts needed to be Use Loctite 755

assembled detergent

P18H00337

Assembly of charge valve

Figures Operation instruction Tools

1. Steel ball and long rod valve
body is placed in the fixing
position of valve body;

P18H00338
4-214
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

P18H00339

2. Turn large metal plug at the

bottom to original position
using 32# open-end wrench
(or socket wrench) with
tightening torque 65N.M\
47.9lbf·ft

P18H00340
 4-215
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

3. Install hex head plug with
tightening torque 13N.M\
9.6lbf·ft

P18H00341

4. Install spring gasket, springs

and gaskets under springs
(take out the components in
sequence shown in the fig-
ure)

P18H00342
4-216
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

5. Install the plug

P18H00343

6. Tighten the plug using spe-

cial straight tooling with
torque 50N.M\ 36.9lbf·ft

P18H00344
 4-217
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

7. Install two cartridge valves
with torque 30NM\ 22.1lbf·ft

P18H00345

P18H00346
4-218
Removal and Installation January 24, 2017
Brake system CLG835H

Figures Operation instruction Tools

8. Install plugs using straight
screwdriver in sequence (P,
T, A1, A2, B3 and S);

P18H00347

Users can not remove and install the internal parts of brake valve on their own without authoriza-
tion of Liugong, otherwise, Liugong will not be liable for the service of quality assurance.
 4-219
January 24, 2017 Removal and Installation
CLG835H Brake system

Removal and installation of accumulator

Removal steps:

Refer to Pressure Release of Hydraulic system to release the pressure of service brake system
and parking brake system before removing the accumulator.

Figures Operation instruction Tools

Open door of left housing:

1. Mark accumulators respec-
tively as BR1, BR2 and BR3 Open-end
and hoses connecting with wrench: 10mm,
their lower parts as A1, A2 22mm and
and B3, note that markings 24mm;
shall be firm; remove hoses
and joints under accumula-
P18H00348
tors and mask oil ports;

2. Remove the 6 bolts from the

accumulator;

Open-end
wrench:
10mm

P18H00349

3. Take the accumulator out of

left housing;
4. Shield the joint of accumula-
tor and store it in dry and
clean place.

P18H00350

Assembly steps: assemble it in the reverse order of the removal steps.

4-220
Removal and Installation January 24, 2017
Brake system CLG835H

Removal and installation of brake cylinder

Removal steps:

Refer to Pressure Release of Hydraulic system to release the pressure of service brake system
and parking brake system before removing the brake cylinder.

Figures Operation instruction Tools

1. Remove the pin shaft
between the brake cylinder
and manual brake;

Pliers

P18H00351

2. Remove the hose from the

brake cylinder, and then
loosen the nuts from the
above end of brake cylinder;
3. Take out brake cylinder;
Open-end
4. Shield the port of brake cyl- wrench:
inder and store it in dry and
clean place. 24mm

P18H00352

Assembly steps: assemble it in the reverse order of the removal steps.

 4-221
January 24, 2017 Removal and Installation
CLG835H Brake system

Hydraulic cooling system

Removal and installation of cooling pump

Removal of cooling pump

Removal of gear pump:

Figures Operation instruction Tools

1. Remove 4 bolts at oil suction
port of gear pump and mask
oil ports;

Open-end
wrench: 15mm

P18H00353

2. Remove 2 oil outlet pipes

P1 shown in the figure, mark
P2 them respectively as P1 and
P2 and note that markings
shall be firm;
Open-end
Loosen the hose joint with
wrench: 27mm
wrench and remove the
and 32mm
hose joint after gentle knock-
down. Block the hose joint.

P18H00354

3. Remove the captive bolt

from the gear pump, and lift
the pump body to the clean
container; avoid collisions to
ensure the personnel secu-
rity during removal; mask
the pump opening to prevent Open-end
it from being contaminated. wrench: 24mm

P18H00355
4-222
Removal and Installation January 24, 2017
Brake system CLG835H

Assembly of cooling pump

Make sure the connection of hose connector oil port is correct. During disassembly process,
guarantee the cleanliness of pipeline and components and check whether O-ring is aged, dam-
aged and replace timely.

Figures Operation instruction Tools

1. Hang the gear pump to the
mounting position with
proper sling;
2. Install gear pump and seal
gasket on gear box;

P18H00356

3. Connect the P1 hose with

P1 the tightening torque of hose
P2 joint 89±4Nm\
65.6±2.95lbf·ft
4. Connect the P2 hose with
the tightening torque of hose
joint 47±2Nm\ 34.7±1.5lbf·ft

P18H00357
 4-223
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

5. Connect steel pipe of oil
suction port and tightening
torque of bolts is 90±10Nm\
66.4±7.4lbf·ft

P18H00358

6. Fill the hydraulic oil, start the

machine and idle it for 5min
to bleed the air in the line;
7. Stop the machine and check
it for leakage.
8. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
4-224
Removal and Installation January 24, 2017
Brake system CLG835H

Removal and installation of cooling motor

Removal of motor

Figures Operation instruction Tools

1. Remove fan guard and
bracket by referring to the
Power System - Radiator
Overhaul Manual;
2. Mark the hoses on the motor
respectively as: A port hose,
B port hose and T port hose.
The identification should be
clear, firm and not fall off.

P18H00359

3. Remove the plates of A port

and B port and T port hose.
Loosen the T hose joint with
wrench and remove the
hose joint after gentle knock-
down. Block the hose joint.
Unscrew A and B plate bolts
with wrench and then place
plate and bolt well after put- Open-end
ting them together and mask wrench: 13mm
joints. and 17mm

P18H00360
 4-225
January 24, 2017 Removal and Installation
CLG835H Brake system

Figures Operation instruction Tools

4. Remove lock nut of motor;

Open-end
wrench: 17mm

P18H00361

5. Remove the captive bolt

from the motor, and hang it
to the clean container; avoid
collisions to ensure the per-
sonnel security during
removal;

Open-end
wrench: 13mm

P18H00362
4-226
Removal and Installation January 24, 2017
Brake system CLG835H

Installation of motor

Figures Operation instruction Tools

1. Install the motor on the
bracket with tightening
torque of bolts 72±6Nm\
53.1±4.4lbf·ft, and then
install locknut;

P18H00363

2. Connect the T hose with the

tightening torque of hose
joint 16±1Nm\
11.8±0.74lbf·ft;
3. Connect A port hose and B
port hose and tighten bolts
to 72±6Nm\ 53.1±4.4lbf·ft;
4. Install fan guard and bracket
by referring to the Power
System - Radiator Overhaul
Manual;
5. Fill the hydraulic oil, start the
machine and idle it for 5min
to bleed the air in the line;
6. Stop the machine and check
it for leakage;

P18H00364 7. Check whether the hydraulic

oil level is normal, and if not,
please fill the hydraulic oil to
the specified level.
 4-227
January 24, 2017 Removal and Installation
CLG835H Brake system

Removal and installation of solenoid directional valve

Removal of solenoid directional valve

Figures Operation instruction Tools

1. Mark the hoses on the sole-
noid directional valve
respectively as: A, B, P and
T. The identification should
be clear, firm and not fall off.
P T

Marker

B
A

P18H00365
2. Remove A port hose, B port
hose, P port hose and T port
hose; Loosen the hose joints
with wrench and remove the
hose joints after gentle
knockdown. Mask joints; Open-end
wrench: 32m,
41mm

P18H00366

3. Remove the captive bolt

from the solenoid direc-
tional valve mounting plate,
and place it in the clean con-
tainer; avoid collisions to
ensure the personnel secu- Inner hexagon
rity during removal; spanner: 8mm

P18H00367
4-228
Removal and Installation January 24, 2017
Brake system CLG835H

Assembly of solenoid directional valve

Figures Operation instruction Tools

1. Install the solenoid direc-
tional valve to its original
position and tighten 2 bolts
to 52±6Nm\ 38.4 ± 4.4lbf·ft

P18H00368

2. Connect the T hose with the

tightening torque of hose
joint 137±6Nm\ 101±4.4lbf·ft
3. 3Connect hoses of B port, A
port and P port and the tight-
P T
ening torque of hose joints is
89±4Nm\ 65.6±3.0lbf·ft

B
A

P18H00365
4. Fill the hydraulic oil, start the
machine and idle it for 5min
to bleed the air in the line
5. Stop the machine and check
it for leakage.
6. Check whether the hydraulic
oil level is normal, and if not,
please fill the hydraulic oil to
the specified level
 4-229
January 24, 2017 Removal and Installation
CLG835H Secondary steering system

Secondary steering system

Removal and installation of secondary steering pump

Removal of secondary steering pump

Figures Operation instruction Tools

1. Open rear hood of engine,
remove 4 plate bolts at right
side of the machine and take
down side hood.

Open-end
wrench

P18H00370

2. Unplug electrical connector

at outside of steering pump
bracket

P18H00371
4-230
Removal and Installation January 24, 2017
Secondary steering system CLG835H

Figures Operation instruction Tools

3. Unplug electrical connector
of secondary steering pump

P18H00372

4. Remove oil inlet & outlet

pipe joint of secondary
steering pump

Open-end
wrench

P18H00373

5. Fix the secondary steering

pump on the frame using lift-
ing rope, and then remove 2
anchor bolts from side plate,
move them out slowly and
place them on level ground. Open-end
wrench
Lifting rope

P18H00374

Installation of secondary steering pump

Assemble the secondary steering pump in reverse order of disassembly.

 4-231
January 24, 2017 Removal and Installation
CLG835H Pilot system of electronic control third linkage

Pilot system of electronic control third linkage

Removal and installation of proportional valve

Removal of proportional valve

Figures Operation instruction Tools

1. Remove two electrical con-
nectors and make marks on
them;

P18H00375

2. Mark the hoses on the pro-

portional valve respectively
as: A port hose, B port hose,
P port hose and T port hose.
The identification should be
clear, firm and not fall off.

P18H00376
4-232
Removal and Installation January 24, 2017
Pilot system of electronic control third linkage CLG835H

Figures Operation instruction Tools

3. Remove A port hose, B port
hose, P port hose and T port
hose. Loosen the A, B, P, T
port hose joints with wrench
and remove the hose joint
after gentle knockdown.
Block the hose joint.
Open-end
wrench: 17mm

P18H00377

4. Remove the bolts;

Open-end
wrench: 10mm

P18H00378

Assembly of proportional valve

Assemble the proportional valve in reverse order of removal.

 4-233
January 24, 2017 Fault Diagnosis and Troubleshooting
CLG835H Common troubleshooting for brake system

Fault Diagnosis and Troubleshooting

Common troubleshooting for brake system

S/N Fault features Reason Troubleshooting methods

1. Air in brake line 1. Bleed the brake line
2. Brake valve fault 2. Check the brake valve and measure the
pressure at port BR1, BR2
Insufficient foot 3. Pump failure 3. Check the pump
1
braking force
4. Leakage in brake line 4. Check the brake line
5. Accumulator damaged 5. Check the pressure of the accumulator
6. Wheel brake friction plate worn to limit 6. Replace the friction plate
7. Brake valve fault 1. Check the brake valve and measure the
Incapable of put- pressure at B3 port
2
ting into gear 8. Parking brake cylinder leakage 2. Check the pressure switch under the
accumulator BR3
1. Brake valve fault 1. Check the brake valve and measure the
No normal release pressure at port BR3
3
of parking brake
2. Parking brake cylinder leakage 2. Replace cylinder oil seal parts
1. Large clearance between brake drum and 1. Readjust the clearance according to the
Insufficient parking brake shoe requirements of use
4
braking force
2. Oil on brake shoe 2. Clean up brake shoe
1. Air valve leakage 1. Check air valve, and supplement nitrogen
Accumulator
5 2. Diaphragm is damaged resulting in nitro- 2. Replace the accumulator
doesn't work
gen leakage
6 No inching braking 1. Brake valve fault 1. Check the pressure at port BR1, BR2
1. Insufficient system oil pressure in a short 1. Please wait
Service or emer- period of time for machine starting
gency brake low
7 2. The machine has system failure and oil 2. Stop the machine for inspection
pressure alarm light
pressure drop during operation
comes on
3. Air leakage in accumulator 3. Check the pressure of the accumulator
4-234
Fault Diagnosis and Troubleshooting January 24, 2017
Common troubleshooting for brake system CLG835H
 5-1
January 24, 2017 Air Conditioning System
CLG835H

Air Conditioning System

Basic Information ............................................................................................................5-3
Safety .....................................................................................................................................................5-3
Universal tool, tooling list .......................................................................................................................5-3
Special tool, tooling list ..........................................................................................................................5-4
Tightening torque for lines connectors of A/C system............................................................................5-4

Structure Function Principle ..........................................................................................5-4

Components and position ......................................................................................................................5-4
System technical parameters.................................................................................................................5-5
Description of principle diagram and working principle ..........................................................................5-6

Testing and Adjustment..................................................................................................5-9

Air conditioning system test ...................................................................................................................5-9

Removal and Installation ..............................................................................................5-11

Introduction of air conditioner system main parts.................................................................................5-11
Removal and installation of A/C components ......................................................................................5-12
Removal of compressor ...................................................................................................................5-12
Removal and installation of evaporator mounting assembly............................................................5-19
Replacement of A/C control panel ...................................................................................................5-24
Inspection and replacement of A/C fuse ..........................................................................................5-25
Removal and replacement of reservoir ............................................................................................5-25
Removal and installation of condenser ............................................................................................5-26
Removal and installation of pressure switch ....................................................................................5-27

Fault Diagnosis and Judgment ....................................................................................5-29

Classification of common faults ...........................................................................................................5-29
Overhauling method.............................................................................................................................5-29
Maintenance method when backlight of A/C panel is not on and button does not work ..................5-29
Maintenance method when no air comes out of air conditioner or air outlet volume is obviously smaller
than the normal volume....................................................................................................................5-30
Maintenance method when natural air comes out when heating is switched on .............................5-36

System Maintenance .....................................................................................................5-37

A/C system regular maintenance .........................................................................................................5-37
Cleaning of recirculating air strainer.................................................................................................5-37
Cleaning of fresh air strainer ............................................................................................................5-38
5-2
Air Conditioning System January 24, 2017
CLG835H

Adjustment of compressor belt.........................................................................................................5-39

A/C refrigerant filling method............................................................................................................5-42
 5-3
January 24, 2017 Basic Information
CLG835H Safety

Basic Information

Safety

Drain refrigerant in air conditioning system as required in Release (recover) refrigerant in air conditioning
system before removing compressor, condenser, reservoir, pressure switch, air conditioner coils, etc.
Seal up the removed pipe joints through a reliable method to prevent moisture in the air from entering air
conditioning system.

If liquid refrigerant splashing into eyes may lead to blind; and spraying on the skin may cause
frostbite. In addition, the container for storing refrigerant can neither be exposed to ambient tem-
perature above 50°C or placed near a heat radiating device or object, nor be exposed to direct
sunlight. In this case, the temperature of the refrigerant easily rises to cause increase in pressure
in the container. When the pressure reaches high enough, the container may have leakage or
explosion.
The refrigerant itself is non-toxic, but it cannot be in direct contact with open flames or heated
metal, otherwise toxic gases will be produced.
In order to avoid the injury from refrigerant, the goggles and gloves should be worn and open fire
or smoking is prohibited.

Universal tool, tooling list

Specifications Main functions

It is used for removal and installation of captive bolts of the pipeline, joint box and
10# Open-end wrench
cover plate
13# Open-end wrench It is used for removal and installation of captive bolts (nuts) of the compressor
It is used for removal and installation of hold-down nuts (screw rods) of tension pul-
14# Open-end wrench
ley
It is used for removal and installation of air conditioning pipe joint in the evaporator
19# Open-end wrench
assembly
It is used for removal and installation of air conditioning pipe joint in the evaporator
21# Open-end wrench
assembly
It is used for removal and installation of air conditioning pipe joint in the evaporator
24# Open-end wrench
assembly
27# Open-end wrench It is used for removal and installation of water hose joint of the evaporator
Cross screwdriver It is used for removal and installation of evaporator mounting assembly
Ratchet wrench It is used for removal and installation of captive bolts of evaporator
13# Socket It is used for removal and installation of captive bolts of evaporator
Extended rod It is used for removal and installation of captive bolts of evaporator
Plastic bag, tape It is used for sealing up the pipe joints
Marking pen It is used for marking the removed joints
5-4
Structure Function Principle January 24, 2017
Special tool, tooling list CLG835H

Special tool, tooling list

Specifications Main functions

Manifold gauge It is used for the drainage and filling of refrigerant
Vacuum pump It is used for the filling of refrigerant

Tightening torque for lines connectors of A/C system

Thread size Tightening torque

5/8-18UNF, M16×1.5 12~15Nm/1.2~1.5kgf•m
3/4-16UNF, M22×1.5 19.6~24.5Nm/1.96~2.45 kgf•m
7/8-14UNF, M24×1.5 29.4~34.3Nm/2.94~3.43 kgf•m
Water inlet and outlet threads 19.6~24.5Nm/1.96~2.45 kgf•m

Structure Function Principle

Components and position

(1) Compressor
Compressor is installed on the fan side of engine, at lower left side of complete machine, and is
driven by engine through belt to operate.
(2) Evaporator assembly
A/C evaporator assembly of this machine is placed in the right of seat, parts inside evaporator
assembly include expansion valve, air door, servo motor, blower unit, and pressure switch.
(3) Air duct assembly and inlet and outlet air vents
Air conditioner of this machine has 2 front vents, 2 rear vents, 4 defroster vents and 2 foot vents, and
vents are connected with evaporator via air duct assembly. Meanwhile, air duct assembly also com-
prises new vents and strainers and accessories. Arrange inside the decoration in the front of, at the
side of and behind the cab.
(4) Control panel
The air conditioner control panel lies on the right side of the cab's roof.
 5-5
January 24, 2017 Structure Function Principle
CLG835H System technical parameters

(5) Condenser&refrigerant reservoir assembly

It is located at the rear of the cooler.
The compressor keeps rotating, the above refrigeration process is cycled continuously. The heat in
the car is taken away by refrigerant in the evaporator, so as to complete cooling and dehumidification
of the complete vehicle.

P18A00001

System technical parameters

Working medium Engine cooling water Unit

Heating module
Heating capacity 5000/6.80 W/PS
Refrigerant R134a
Air conditioner module Refrigerating capacity 5000/6.80 W/PS
Refrigerant filling quantity 1200±30/2.65±0.07 g/lb
Voltage 24 V
5-6
Structure Function Principle January 24, 2017
Description of principle diagram and working principle CLG835H

Description of principle diagram and working principle

Air conditioner of this machine is vapor compression type refrigeration air conditioner, refer to
its working process and principle as follows:

(1) Compression process

Refrigerant absorbs heat in the evaporator and then changes into low-temperature low-pressure
refrigerant vapor, which is sucked into the compressor, where it is compressed into high-temperature
high-pressure refrigerant vapor, and then is discharged into the condenser.
(2) Condensation process
After high-temperature and high-pressure gaseous refrigerant enters condenser, the air, driven by
the engine radiator fan, passes across condenser surface to bring away heat of refrigerant. The
refrigerant is condensed into medium-temperature and high-pressure liquid type.
(3) Throttling process
Medium-temperature and high-pressure refrigerant liquid is filtered by dryer and then throttled
through the expansion valve (refrigerant is sprayed from the pores of expansion valve and expanded
suddenly). It changes into low-temperature and low-pressure refrigerant mist for entering the evapo-
rator.
(4) Evaporator process
Low-temperature and low-pressure refrigerant liquid formed by the throttling of expansion valve is
vaporized in the evaporator, the air in the car is driven by the evaporator fan unit to flow through the
evaporator surface. The refrigerant absorbs the heat of air in the car, thus to reduce the air tempera-
ture, and dissolve out condensate water. Refrigerant absorbing heat is evaporated into low-tempera-
ture and low-pressure refrigerant vapor, which is sucked into the compressor and compressed again,
so that one refrigeration cycle is completed.
The compressor keeps rotating, the above refrigeration process is cycled continuously. The heat in
the car is taken away by refrigerant in the evaporator, so as to complete cooling and dehumidification
of the complete vehicle.
 5-7
January 24, 2017 Structure Function Principle
CLG835H Description of principle diagram and working principle

Fig.1 Schematic diagram for A/C system

Principle->cooling principle
ŚCompressor
High temperature & high pressure gas state Low temperature & śCondenser
low pressure gas state ŜReceiver dryer
ŝExpansion valve
ŞEvaporator

Heat
Cooling absorption
state
low pressure liquid
Low temperature &

Medium temperature &

high pressure liquid state

P18A00002

Refer to the attachment figure in Chapter 9 for the A/C system electrical principle.
5-8
Structure Function Principle January 24, 2017
Description of principle diagram and working principle CLG835H

Connector view direction

Connect the control panel

Blade-type socket 5556-PT

Technical requirements
1.It needs to add wire number on the wire correspondingly;
2.Pull-out force fits ZB/T36003;
3.Dashed line shows the insulating tape wraps compactly,
and other protection jackets shall be wrapped discontinuously
with insulating tape;
4. Apply the AVSS wire to produce.

Connect the evaporator harness

Plastic connnector
Copper part

Wire
No.
Terminal1

Terminal2
Wire
length
Section
Red/ Black/ Blue/ Blue/
Color Red Black Brown gray White yellow Gray White black Gray Blue Yellow Green White green

P18A00003
 5-9
January 24, 2017 Testing and Adjustment
CLG835H Air conditioning system test

Testing and Adjustment Step 4

Check whether the refrigeration function is

Air conditioning system test normal according to the following steps

● Check whether outlet air temperature of cab

vent is obviously lower than outside air tem-
perature. If not, the air conditioner system
works abnormally.
It is suggested to check air conditioning sys-
tem at air temperature above 28°C, since air ● Observe sight glass beside reservoir. In nor-
conditioning system may not be started nor- mal circumstances, no air bubbles or only
mally at too low air temperature. few air bubbles shall be seen through sight
glass. If a large number of air bubbles can be
The above steps are used for simply judging seen, or refrigerant appears like foam, it
whether air conditioning system works means air conditioning system is out of order.
normally and is in good conditions. Where
appropriate, it is more accurate to connect ● Respectively touch the air inlet part near
the pressure gauge for judging. If air upper part of condenser and air outlet part
conditioning system works obviously near lower part by hand, as shown in the fig-
abnormally, refer to Fault Diagnosis and ure below. In normal circumstances, the air
Judgment of the instructions for treatment inlet part shall be hot to some extent, and the
method air outlet part shall be close to air tempera-
ture. The temperature near air inlet is not
high, which means the refrigerant is insuffi-
Step 1 cient, or compressor doesn’t work normally; If
the temperature in normal temperature zone
Park the complete machine on a flat ground, and is not obviously different from high tempera-
check to make sure parking brake is applied. ture zone, it means condenser has poor cool-
Start engine, and let a companion to depress the ing. Please clean up the dirt on condenser
accelerator so that the engine operates at high surface.
idle speed.

Step 2
Areas of high-
temperature
Turn on the A/C switch, adjust the air conditioner
to the cooling mode, and control the air supply
speed at high speed by adjusting the air speed
switch. Select the minimum temperature.
Areas of
Step 3 proximal room
temperature
Keep the air conditioning system operating sta-
bly for 2 min. Observe the end face of A/C com-
pressor belt pulley. In normal circumstances, the
P18A00004
clutch shall be engaged, and the end face of belt
pulley shall rotate along with belt. If the end face
of the pulley is still, then the compressor is out of
work. Confirm the working state of the compres-
sor, then perform the following steps.
5-10
Testing and Adjustment January 24, 2017
Air conditioning system test CLG835H

● Observe sight glass beside reservoir, and

touch lower end of reservoir by hand. If the
lower end of reservoir is cold while bubbles
appear through sight glass, it means strainer
inside reservoir is blocked. In normal circum-
stances, the temperatures at all parts of res-
ervoir are basically the same to that of
condenser outlet.
● Touch air intake hose joint (thick joint) of
compressor by hand. If it is not cold, it means
refrigerant is insufficient or refrigerating sys-
tem is blocked or compressor valve block is
damaged. Further inspection is needed.
● If air cooler is switched on for about 20~50
minutes, air at the outlet is getting hot, air
outlet volume becomes smaller. The cooling
capacity and air outlet volume return to nor-
mal when the cooler is switched off (but air
ON) and then switched on 10~15 minutes
later, it means defrosting sensor in evapora-
tor is out of order.
● If the refrigeration is operated normally for
several minutes, and stops for several min-
utes, and then restores to normal for several
minutes, so repeatedly, please observe the
operation condition of compressor: If com-
pressor operates in both cases of refrigera-
tion and no ,refrigeration, it means there is
too much water in the system; If compressor
only operates in the condition of refrigeration
and does not operate in the condition of no
refrigeration, the reason may be that the air
temperature at that time is lower than or
close to set temperature, or control panel is
out of order.
● If the refrigeration operates for several sec-
onds to tens of seconds, and stops for sev-
eral seconds to tens of seconds, so
repeatedly, it means there is too much refrig-
erant or air is mixed in refrigerating system,
or the condenser is too dirty, the system
enters automatic protection due to overhigh
pressure, so that further check and treatment
are needed.
 5-11
January 24, 2017 Removal and Installation
CLG835H Introduction of air conditioner system main parts

Removal and Installation 5. Expansion valve

The expansion valve is a throttling unit, used for

Introduction of air conditioner throttling and step-down as well as flow adjust-
ment; meanwhile, it can also prevent wet com-
system main parts
pression, liquid impact and abnormal
overheating. The air conditioning of this machine
1. Compressor adopts the H-type thermal expansion valve.

The compressor is a core component of the air 6. A/C pipe

conditioning system. It is used to compress low-
temperature and low-pressure refrigerant vapor The connection lines of air conditioning system
into high-temperature and high-pressure refriger- include high-pressure pipes and low-pressure
ant vapor. The compressor used for the system pipes. Among them, compressor-to-condenser
is a swash plate one. Model: 10P17, displace- hose and reservoir-to-evaporator hose are high
ment: 178cm³, and refrigerant oil brand: PAG46. pressure hoses, and evaporator-to-compressor
hose is low pressure hose.
2. Evaporator
7. Pressure switch
The evaporator is used to allow throttled low-
temperature and low-pressure refrigerant to The engagement and disengagement of com-
absorb large heat from the surrounding air during pressor clutch are controlled by pressure of pres-
evaporation therein, so as to realize the purpose sure switch monitoring system to realize the
of cooling or dehumidification in the vehicle. The purpose of protecting refrigerating system. A
evaporator of air conditioning system is a double high/low-pressure combination switch is used in
laminated type evaporator. this system, the upper limit value of high pres-
sure is 3.14 Mpa, and the lower limit value of low
3. Receiver dryer pressure is 0.196 Mpa.

The receiver drier is a unit as required to ensure 8. A/C control panel

the normal operation of compressor and refriger-
ating system. Its functions includes: 1. storage, It has the action of controlling the ventilation, air
2. filtration, 3. drying. change, refrigeration, heating, defrosting and
other functions of air conditioning system. Auto-
4. Condenser matically switch on/off air conditioner or heater
through internal control program so as to main-
The condenser is a heat-exchange unit which tain temperature inside cab to be around setting
absorbs the heat of high-pressure overheated temperature.
refrigerant vapor from the compressor, con-
denses into liquid type for over cool heat
exchanger. The air conditioner of the vehicle
adopts parallel-flow type condenser and others.
5-12
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Removal and installation of A/C components

Removal of compressor

Release (recover) refrigerant in air conditioning system

Only the release of refrigerant is described in this manual. It is recommended to use special equipment
to recover and recycle refrigerant if available.
Incorrect release of refrigerant will cause adverse effect on air conditioning system, especially service
life of compressor.

Figures Removal and installation Tools

1. Stop the machine or switch
off the air conditioning sys-
tem for at least more than
one hour, then close the
negative switch, and put up
"DO NOT OPERATE" warn-
ing decal.

P18A00006

2. First close the high and low

pressure valve at the place
of manifold gauge.

3. Close the valve of high and

low pressure connector.
P18A00007 Manifold gauge

P18A00008
 5-13
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Figures Removal and installation Tools

4. Open rear cover to the
extent of sufficiently expos-
ing compressor and lines
thereof.
5. Unscrew the plugs from the
high and low-pressure fillers
of compressor, and connect
the high and low-pressure
valves of manifold meter
respectively to fillers of high
and low-pressure pipes.
Open the valve of joint after
connection.
Note: The pipeline is very thick.
The one with thinner interface is
P18A00009
low pressure pipe; The pipeline
is very thin, but the one with
thicker interface is high pres-
sure pipe. This part interface
has a design to avoid being con-
nected wrongly, it cannot be
connected if connected wrongly.
5-14
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Figures Removal and installation Tools

6. Slowly loosen low pressure
valve on manifold gauge so
as to slowly eject refrigerant.
Note the opening of control
valve. Too large flow rate
may easily cause refriger-
ant oil to be ejected out
along with refrigerant. Con-
trol the flow rate to the
extent that no refrigerant oil
is ejected out (released
refrigerant is gaseous, and
refrigerant oil is liquid. Aim
refrigerant outlet at one
piece of white paper, and
observe whether there are
P18A00010 liquid drops to be ejected
out). After 10 minutes,
slowly open high pressure
valve, and continue control-
ling flow rate to avoid refrig-
erant oil from losing. The
whole release process
should keep 15-30 minutes.
WARNNING: It is forbid-
den to release refrigerant
from high pressure end at the
beginning, since high pres-
sure end is easy to cause
refrigerant oil to be ejected
out along with refrigerant.
7. Close the high and low pres-
sure connector and remove
it.

P18A00011
 5-15
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Remove lines connecting the compressor and compressor

If interior of compressor is damaged or refrigerant oil becomes grey or black, receiver must be
replaced while replacing compressor. Otherwise it will shorten service life of compressor.

Figures Removal and installation Tools

1. Loosen M6 captive bolts of
compressor line with a
wrench, and remove the
line.

10# Open-end
wrench

P18A00012

2. Wrap two removed line con-

nectors with clean and
unbroken plastic bags, tie
them up with adhesive tapes Plastic bag, tape
to prevent air and foreign
matter from entering the
line.
3. Disassemble the harness
#13 Open-end
connector of compressor
wrench
clutch.
4. Remove belt as specified in
Removal and Installation of
Belt and Tension Pulley.
Loosen the idler disassem-
bly belt first.
P18A00013
5-16
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Figures Removal and installation Tools

5. Remove 4 M8 bolts fixing
compressor, and remove
compressor.

P18A00014
 5-17
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Figures Removal and installation Tools

Installation method: Torque spanner
1. Tighten 4 M8 captive bolts of 10# Open-end
A/C compressor with torque wrench
spanner, and control the
torque to 22~30Nm.
2. Install the belt as specified in
Removal and Installation of
Belt and Tension Pulley of
the book.
3. Connect the compressor
clutch connectors, and fix
the compressor line on the
A/C compressor with the
bolts of M6X30-8.8.

P18A00014

P18A00015
5-18
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Removal and installation of belt and tension pulley

Figures Removal and installation Tools

1. Loose the hold-down nut of 13# Open-end
tension wheel with a wrench
wrench.
10# Open-end
wrench
2. Loosen tension screws, and
14# Open-end
remove A/C compressor
wrench
belt.
3. Continue to loosen hold-
down nut and tension screw
14# Open-end
rod of tension pulley and
wrench
until it is disengaged, and
remove tension pulley.

Installation method:
P18A00016
1. Tighten the hold-down nut
and tension of screw rod of
tension pulley with wrench
first, and fix the tension pul-
ley at a position.
2. Install A/C compressor belt
among tension pulley, A/C
compressor belt pulley and
engine belt pulley, and then
adjust gradually tension
screw rod and tighten hold-
down nut to preliminarily fix
belt.
3. Adjust the belt tension
according to the Adjustment
of Compressor Belt.

P18A00016
 5-19
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Removal and installation of evaporator mounting assembly

The following operation sequence is used for removing evaporator as from cab as. Most actual
failures are failures of certain components (such as fan, circuit, etc.) in evaporator, so it is sug-
gested to carry out selective removal, repair and replacement after failure judgment in Chapter
Fault Diagnosis and Judgment of this manual in order to avoid unnecessary operations.

Figures Removal and installation Tools

1. Drain refrigerant in air condi-
tioning system as required in
Release (recover) refriger-
ant in air conditioning sys-
tem.
2. Remove the cab-rh cover (
install flange bolt whose bolt
is M8)
#13 Open-end
wrench

P18A00017

3. Remove the left evaporator

fresh air filter which is fixed
by three butterfly bolts.

P18A00018
5-20
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Figures Removal and installation Tools

4. Remove the pipelines under
evaporator and mark that
with marker. Seal the con-
1 3 nectors with plastic bags
2
4 and adhesive tape after
removal, in order to prevent
foreign matter from entering 19#, 21#, 24#,
the line. 27# Open-end
wrenches
Plastic bags,
marker and
5 6 adhesive tape

1. Water drain pipe 5. The hose from

2. Warm water inlet pipeline evaporator to compressor
3. Warm water return pipeline 6. The hose from resevior
4. Water drain pipe bottle to evaporator
P18A00019

5. Open the cover plate of right

shutter inside cab.

P18A00020
 5-21
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Figures Removal and installation Tools

6. Remove two connectors,
which connected with evap-
orator and electrical system
One connector lies behind
the shutter of recirculating
air filter element, and the
other lies beside fresh air fil-
ter.

P18A00021

P18A00022
5-22
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Figures Removal and installation Tools

7. Remove 4 M8 mounting 13# Open-end
bolts, two of which are in wrench
inner cab, another two are in
the cab's right.

P18A00023

P18A00024
 5-23
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Figures Removal and installation Tools

8. Remove the the seal plate 10# Open-end
outside the evaporator. (4 wrench
M6 bolts)

P18A00025

9. Take out the entire evapora-

tor from left to right, and fin-
ish the removal.
Installation sequence is in
reverse order of removal
sequence. The pipe connec-
tor torque should be based
on the tightening torque
requirements of the respec-
tive A/C pipe connector.

P18A00026

Each lower part location of evaporator assembly

During the actual use, in general, motor, circuit and other faults of evaporator assembly appear. There-
fore, please make an analysis and then disassemble the evaporator according to Fault Diagnosis and
Judgment Fault Diagnosis in this manual. Each lower part location of evaporator assembly will be pro-
vided, so that it is easy to remove and install.
5-24
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Evaporator assembly

11

10

6
4
7

9
3
2
2
5 1 2

2
2

8
P18A00027

1. Damper motor 5. Temp sensor 9. Strainer

2. Relay 6. Evaporator core 10.Heater core
3. Expansion valve 7. Temp sensor 11.Blower unit
4. Shell 8. A/c harness
 5-25
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Replacement of A/C control panel

Figures Removal and installation Tools

1. Remove the cover of control
panel. (Cover is buckled on
decoration through plastic
buckle and can be directly
plugged out.)

P18A00028

2. Remove four bolts fixing Cross screw-

control panel. driver
3. Pull out the connector on the
control panel and then take
off the control panel.

P18A00029

Inspection and replacement of A/C fuse

When there is no display on A/C panel and A/C is inoperative after starting the machine, check whether
A/C fuse is burned out. Refer to the part of electric appliance in this Instruction for detail
5-26
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Removal and replacement of reservoir

Figures Removal and installation Tools

1. Open the cover
2. Drain refrigerant in air condi-
tioning system as required in
Release (recover) refriger-
ant in air conditioning sys-
tem.
3. Remove the captive bolt of 10# Wrench
the hose from condenser to
Plastic bag, tape
reservoir, and the captive
bolt of the hose from reser-
voir to evaporator. Remove
the hose from condenser to
reservoir, and the hose from
reservoir to evaporator. Seal
the open interfaces well with
plastic bags and adhesive
P18A00030 tapes.
4. Loosen the captive bolt on
the fluid receiver bracket
clamp. The refrigerant reser-
voir can be removed.
Installation method: 10#Wrench
1. Place refrigerant reservoir in
the bracket, and tighten the
bolts on the bracket with
wrench.
2. Install the hose from con-
denser to reservoir and the
hose from reservoir to evap-
orator to the refrigerant res-
ervoir, and control the torque
to 4~7Nm.

P18A00030
 5-27
January 24, 2017 Removal and Installation
CLG835H Removal and installation of A/C components

Removal and installation of condenser

Figures Removal and installation Tools

1. Open the rear cover by
operating the step 1-3 of
Removal and Replacement
of Reservoir
2. Remove captive bolt of com- 10#Wrench
pressor-to-condenser hose
Plastic bag, tape
and condenser-to-reservoir
hose, and seal open joints
with plastic bags and adhe-
sive tapes.

P18A00031

3. Remove the captive bolts of 13#Wrench

condenser (4 total on left
and right side).

P18A00031
5-28
Removal and Installation January 24, 2017
Removal and installation of A/C components CLG835H

Removal and installation of pressure switch

Figures Removal and installation Tools

1. Drain refrigerant in air condi-
tioning system as required in
Release (recover) refriger-
ant in air conditioning sys-
tem.
2. Pull out connector of pres-
sure switch.

P18A00032

3. Unscrew the pressure 27# Wrench

switch.
Installation sequence is in
reverse order of removal
sequence.

P18A00032
 5-29
January 24, 2017 Fault Diagnosis and Judgment
CLG835H Classification of common faults

Fault Diagnosis and Judgment

Classification of common faults

Common fault of air conditioning system includes:

1. The air conditioning panel neither display nor function.
2. No air comes out of air conditioner or air outlet volume of air conditioner is small (in the circumstance
that correct position is selected).
3. It generates heater or natural wind under cooling mode.
4. It generates natural air blowing under heating mode.

Overhauling method

Maintenance method when backlight of A/C panel is not on and button does not work

Note: If the first item is normal, go to the second one, and the like.

Items Inspection items Description Troubleshooting methods

The air conditioner cannot be used Use the air conditioning when the
1 Check if the machine is started
until the whole vehicle is started complete engine is started
If fuse is burned, check whether
Replace, repair short circuit ele-
2 Whether the A/C fuse is burned wiring and each load are short-
ments or parts
circuited
Connector XL8 is connected or not
Whether there are problems such
Whether the connectors at both
3 as poor contact and exit of contact Repair the damaged parts
ends of control panel harness is
pin
properly connected
Wire 220 (gray) should be earthed
Line #138 (orange) should be high It indicates failure of complete
level engine circuit in case of any anom-
Pull out connector XL8 and check
4 Line #800 (white) should be high aly. Refer to the part of electric
every pin with a multimeter
level appliance in this Instruction for
Wire #484 (white) should be sus- maintenance
pended

5 Replace control panel

If failure is not eliminated by the above steps, it means control panel harness or evaporator harness is
out of order. Please refer to schematic diagram of air conditioning system for troubleshoot procedures .
5-30
Fault Diagnosis and Judgment January 24, 2017
Overhauling method CLG835H

Maintenance method when no air comes out of air conditioner or air outlet volume is
obviously smaller than the normal volume

Firstly, set air outlet volume to maximum, and listen whether there is a sound of blower operation.
If the blower doesn’t operate, overhaul it in the following order

Blower unit is
not working.

Check
whether
the A/C fuse
is blown
No
Yes

Measure if
Check every connector clip
line and load of blower unit
for short is electrified
Yes No
circuit.

Yes No Check Select low, medium

whether the and high positions on
negative pole is corresponding panel,
grounding and respectively check
No
Yes whether pins #13, #14
Check whether
Wire or load the evaporator and #16 on control
repaired or blower impeller panel are live.
replaced The blower unit The negative wiring
is seized is faulty, replace it of blower unit is off Yes No

Yes No The relay or lines of

corresponding gear Control panel or its
on the evaporator circuit failure
Remove foreign The blower unit malfunctions.
materials is faulty, replace it

P18A00033
 5-31
January 24, 2017 Fault Diagnosis and Judgment
CLG835H Overhauling method

If the blower operate normally, overhaul it in the following order

Low air flow or

none air flow

Whether the return

air and fresh air
sensors are blocked
Yes seriously No

Check if
Clean or voltage of
replace the blower unit
relative is too low
Yes No
filters

The voltage of
complete machine
Check whether the is insufficient
condensed water drained or resistance of
from the a/c evaporator out of circuit board is
over large
vehicle drips slowly
or does not drip
Yes No

Switch off refrigeration, The blower

open doors and windows, unit is faulty
set air outlet volume in high position,
and observe for 5~-10 minutes to
see whether evaporator drains
water too quickly and air
volume is restored.

Yes No

The blower
unit is faulty
Whether air then is
too moist or low air
speed position
is used.

Yes No

Increase air Check whether

speed, and select defrosting
temperature
the temperature of sensor is damaged
slightly high position by measuring
(such as 26°C, resistance (see
cold enough is ok.) attached table).

Yes No

Replace control
Replacement panel P18A00034
5-32
Fault Diagnosis and Judgment January 24, 2017
Overhauling method CLG835H

Maintenance method when warm air or natural air comes out when refrigeration is switched on

Heating or natural
air blowing under
cooling mode

Check
compressor
running
conditions
Compressor The compressor
runs normally is not working.

Turn off
the water valve
connecting the warm
water pipe on the
engine, check for
Yes malfunctions No Measure whether
the connector of
compressor clutch
has electricity
Yes No
Solenoid water valve Check the
is stuck in the open refrigerant from
position, or circuit sight glass
problems cause the
solenoid valve start
to be powered. No air bubble can be
seen from the fluid in Lots of bubbles
spection mirror or only a in sight glass Check
small amount can be seen whether Check the
there is the ground control panel
Replace the solenoid connection of Pin #18 for
water valve or check compressor electricity
the circuit Connect the manifold Check follow the housing
meter, measure pressures item 1 in the table
at high and low pressure
ends, and compare them
with normal pressure (see Yes No
table attached hereinafter). Yes No
Check follow
the item 2 in the table The refrigeration relay
on the evaporator
The electromagnetic Check
or its related lines
clutch coil is tripping whether
Repair and malfunctions
off and replace the two wires of pins
make it
clutch or No.6 and No.8 on
earthed well
the compressor control panel are
conducted.

No
Yes

Check whether the

Check the defrost pressure switch is
sensor for break circuit or breakover/connected
short circuit
Yes No
Yes No

Check the
Pressure switch high pressure of
wiring fault refrigerant
Defrost sensor or its Control panel fault
circuit failure

ψ 0. 196 Mpa ϊ 0.23 Mpa

Few refrigerant or Pressure switch or its

none refrigerant circuit failure
P18A00035
 5-33
January 24, 2017 Fault Diagnosis and Judgment
CLG835H Overhauling method

Troubleshooting meth-
Items Fault conditions Cause
ods
Air bubbles persistently exist in sight glass, com-
pressor air intake hose joint is not cold enough Check and repair leakage
Refrigerant leakage.
and even warm, the upper end and lower end of parts, and refill refrigerant.
1 Insufficient refrigerant fill-
reservoir do not have temperature difference, and Refer to A/C Refrigerant Fill-
ing amount.
temperature is higher than or equal to ambient ing Method
temperature
Compare the pressures of air conditioning system
operating at high and low pressures with normal
pressures (see table attached hereinafter)
1. Normally refrigerate for several min-
utes, stop refrigerating for several
minutes, and normally refrigerate for There is too much water Replace reservoir, vacuum
several minutes…repeat like this. in refrigerating system to pumping for more than 1 h,
2. Compressor is operating continu- cause ice blockage in and fill refrigerant once again
ously.
expansion valve (orifice is as specified in Removal and
3. The pressure at the beginning of
refrigeration is normal, and pressures frozen due to water accu- Installation of A/C Compo-
at low pressure side and high pres- mulation to block orifice) nents
sure side when refrigeration stops
are obviously low.
1. Touch compressor air intake hose 1. Switch on refrigeration for
joint (thick joint) by hand to feel no about 1 minute and switch
coldness. off refrigeration for about
3~5 minutes with doors
Pressure of low pressure

2. There are no big differences in tem-

side and high pressure

perature of the high temperature and windows open under

side are both low

zone and the low temperature zone high engine speed (engine
2 of a condenser. can be at idle speed but air
3. The temperature of each part of res- volume shall be in highest
ervoir is basically the same to that of The interior part of refrig- position), then step on
condenser outlet and close to ambi- erating system is very accelerator to refrigerate
ent temperature. for about 1 minute…repeat
dirty, and the expansion like this for three times so
valve orifice is blocked by that contamination and
dirt blockage may be elimi-
nated.
2. If the above methods are
ineffective, clean or
replace expansion valve; If
gray black or brown black
color appears in sight
glass, please make sure to
replace reservoir.
Replace the expansion
The expansion valve con-
valve; If gray black or brown
trol head leaks and the
black color appears in sight
valve hole switches
glass, please make sure to
smaller automatically
replace reservoir.
5-34
Fault Diagnosis and Judgment January 24, 2017
Overhauling method CLG835H

Troubleshooting meth-
Items Fault conditions Cause
ods
1. Touch compressor air intake hose
joint (thick joint) by hand to feel no
coldness.
2. There are no big differences in tem-
perature of the high temperature
zone and the low temperature zone Line between sight glass
of a condenser. outlet and compressor air
3. The temperature of each part of res- intake port is blocked or
ervoir is basically the same to that of crushed by foreign matter Remove blocked pipelines,
condenser outlet and close to ambi-
ent temperature. blow out foreign matters or
4. There is obvious temperature differ- release the one being
ence at both ends of the blocked pressed to flat; If gray black
part.
or brown black color appears
1. Touch compressor air intake hose in sight glass, please make
joint (thick joint) by hand to feel no sure to replace reservoir.
coldness.
2. There are no big differences in tem- Line between condenser
perature of the high temperature outlet and sight glass
zone and the low temperature zone
of a condenser. inlet is blocked by for-
3. There is obvious temperature differ- eign matter
ence at both ends of the blocked
part.
4. Bubble visible in sight glass.
1. Touch compressor air intake hose
joint (thick joint) by hand to feel no
coldness.
2. There are no big differences in tem-
perature of the high temperature Filter of reservoir is Replace the refrigerant res-
zone and the low temperature zone blocked by dirt ervoir
of a condenser.
3. Bubble visible in sight glass.
4. The bottom of the reservoir is cold
and even has condensing dew.
5. Bubble visible in sight glass.
6. Touch compressor air intake hose
joint (thick joint) by hand to feel no
coldness. Detect leakage, repair and
Less refrigerant
7. The upper end and lower end of res- add refrigerant
Pressure of low pressure side and high

ervoir do not have temperature differ-

ence, and temperature is higher than
pressure side are both high

or equal to ambient temperature.

1. Observe sight glass in the case of
compressor operation, and no air
bubble in sight glass within 5~10 sec-
onds after refrigeration is switched
off. Release or recycle some
Redundant refrigerant
2. Temperature in the condenser nor- refrigerant
mal temperature zone almost has no
difference with ambient temperature.
3. The condenser high temperature
zone is hotter than normal situation.
1. Observe air bubbles in sight glass in Release refrigerant, vacuum
the case of compressor operation. The cooling system has pumping, and fill refrigerant
2. The pointer of high pressure gauge non-condensing gas such once again as specified in
vibrates sharply and frequently.
as air Removal and Installation of
A/C Components
 5-35
January 24, 2017 Fault Diagnosis and Judgment
CLG835H Overhauling method

Troubleshooting meth-
Items Fault conditions Cause
ods
High temperature zone of condenser is
hotter than that in normal circumstance,
Dirty surface of the con- Clean the surface of the con-
and normal temperature zone of con-
denser denser
denser is hotter than that in normal cir-
cumstance.
1. There is too much condensed water Expansion valve has too
on surface of low pressure pipe, and large opening degree or
middle housing of condenser is not Clean or replace expansion
hot or cold and even has condensed is stuck in large opening
valve
water. degree position by for-
2. There are bubbles in sight glass. eign matter
1. The air intake hose joint of compres- Compressor air suction
Voltage of low voltage side

sor is under normal temperature or valve block is damaged

warm.
is high, vice versa

or cylinder body, piston or Replace the compressor

2. The pointer of low pressure gauge
swings. piston ring leaks air due
to wear
1. The compressor exhaust pipe joint is
hotter than usual. The exhaust valve plate
2. The pointer of high pressure gauge of compressor is dam- Replace the compressor
vibrates sharply. aged
5-36
Fault Diagnosis and Judgment January 24, 2017
Overhauling method CLG835H

Maintenance method when natural air comes out when heating is switched on

Note: Please check warm water valve on engine has been opened first, and engine coolant temperature
has been far above air temperature. Or it is common to have no warm wind, it is not a malfunction.

Natural air blowing

under heating mode

Turn on and
turn off the heater,
touch the solenoid water
valve for
Yes operation No

Measure and warm air

connector of waterpipe for
solenoid water valve. It blocking or flating
shall be live at one end and bending
and be grounded
Yes No
at the other.

Solenoid water
valve fault, replace
solenoid water valve Measure
connector of
solenoid water valve.
It shall be live at one
Yes end and be grounded No
at the other.

Solenoid water valve

fault, replace solenoid
water valve
Check the output
of the control panel
pin 11 for high voltage
Yes No

Heating relay error Control panel fault,

or its circuit failure control panel
P18A00036
 5-37
January 24, 2017 System Maintenance
CLG835H A/C system regular maintenance

System Maintenance

A/C system regular maintenance

Cleaning of recirculating air strainer

Figures Operation step Tools

1. Open the shutter on the right
of inner cab's plate.

P18A00037

2. Screw off the two butterfly

bolts of the filter, and then
remove the recirculating air
strainer.
3. Blow off dust from air outlet
surface to air inlet surface of
recirculating air strainer with
compressed air.

P18A00038
5-38
System Maintenance January 24, 2017
A/C system regular maintenance CLG835H

Cleaning of fresh air strainer

Figures Operation step Tools

1. Remove the shutters on the
right of the cab's cover.

P18A00039
2. Unscrew the three butterfly
bolts fixing the new air filter
of air conditioning.

P18A00040
 5-39
January 24, 2017 System Maintenance
CLG835H A/C system regular maintenance

Figures Operation step Tools

3. Remove the fresh air
strainer.
4. Blow off dust from air outlet
surface to air inlet surface of
fresh air strainer with
compressed air. (The
arrowhead in the Figure is
the air intake direction)

P18A00041

Adjustment of compressor belt

Figures Operation step Tools

1. When a load W=1.5 Kg is
applied to perpendicular belt
edge at neutral point of
tangential edge between
belt and two belt pulleys (a/c
compressor belt pulley and
belt pulley on engine) by
hand, the deflection f of belt
shall be 5±1 mm.
If belt deformation is too large or
too small, it means belt has
inappropriate tension and needs
to be adjusted
P18A00042
5-40
System Maintenance January 24, 2017
A/C system regular maintenance CLG835H

Figures Operation step Tools

2. Loosen the hold-down nut of
tension pulley.

14# Wrench

P18A00042
3. Tighten tension bolt, and
belt becomes taut; While
loosen tension bolt, and belt
becomes loose. Constantly
adjust tension bolt, and test
belt deformation until belt
tension becomes
appropriate. 14# Wrench

P18A00042
4. Tighten the hold-down nut of
tension pulley.

14# Wrench

P18A00042
 5-41
January 24, 2017 System Maintenance
CLG835H A/C system regular maintenance

A/C refrigerant filling method

Even though there is only little water in air conditioning system, water vapor at low temperature
part may be frozen to cause refrigerant circulation blockage or compressor valve corrosion, etc.
Therefore, when refrigerant is refilled after parts are replaced or air conditioning system is rein-
stalled in complete machine, strictly vacuum pumping, maintain pressure to check leakages and
continue to refill refrigerant after system airtightness is confirmed to be good.

Because air conditioning system is not an absolutely airtight system, the problem of deficient refrigerant
may occur after it is used for a period of time. At the moment, if refrigerant in the system is confirmed not
to completely lose, start the operation of refilling refrigerant starting from step X of the instructions.

Figures Operation step Tools

1. Connect manifold gauge
and A/C filler according to
the sequence specified in
Release (Recover) Refriger-
ant in Air Conditioning Sys-
tem, and make sure there is
no refrigerant in the system.

1.Low pressure gauge

2.High pressure gauge
3.Low pressure valveδLOε
4.High pressure valveδHIε
P18A00043

2. Connect the hose connect-

ing port A on the manifold
gauge to vacuum pump.

Vacuum pump,
manifold meter

P18A00044
5-42
System Maintenance January 24, 2017
A/C system regular maintenance CLG835H

Figures Operation step Tools

3. Start vacuum pump to vacu-
umize for 5 minutes, and
make sure indications of
high and low pressure
gauges are about -750 mm
Hg (or -0.1 MPa/14.5psi).
Note: In general, high pressure
gauge and its connector are red,
and low pressure gauge and its
connector are blue.
P18A00045

4. First close high pressure

valve (HI) and low pressure
valve (LO) of line pressure
testing device, and then turn
off vacuum pump.
5. Wait for 5 minutes in this
status, and observe that the
reading of low pressure
gauge shall have no
change. The pick up of pres-
P18A00046
sure indicates there is a
leakage in the system.
Check and repair leaking
areas, repeat the 3-5 steps.
The steps 6-8 below are opera-
tions when portable canned
refrigerant is used. It may
change as the packaging type of
cold media changes. Please
confirm the refrigerant con-
tainer is properly connected to
the manifold gauge.
6. Install the plug clock to
refrigerant container.
7. Connect hose connecting
point A of manifold gauge to
the screw plug of refrigerant
container.
 5-43
January 24, 2017 System Maintenance
CLG835H A/C system regular maintenance

Figures Operation step Tools

8. Rotate handle of screw plug
clockwise so that pintle
punctures refrigerant con-
tainer, and then rotate screw
plug handle counterclock-
wise so that the pintle exits.
9. Loosen nut on manifold
gauge connecting refriger-
ant receiver connecting
hose, drain air in the filling
P18A00047
hose by using refrigerant
pressure, and tighten nut
immediately after listening
"Hissing" sound.
10. Open high pressure valve 4
so that refrigerant enters
high pressure side of air
conditioning system.
11. Observe high pressure
gauge, and close high pres-
P18A00048
sure valve 4 until pressures
does not rise any more.
CAUTION: At the
1 2 moment, make sure high
pressure valve has been
closed, or else subsequent
operations may cause dam-
ages to compressor.
12. Start the engine to idle state
and open the cab's door and
window. And turn on the air
conditioner to cooling mode.
3 4 Adjust to the maximum
1.Low pressure gauge wind.
2.High pressure gauge
3.Low pressure valve（LO）
4.High pressure valve（HI）
P18A00049
5-44
System Maintenance January 24, 2017
A/C system regular maintenance CLG835H

Figures Operation step Tools

13. Open low pressure valve 3,
depress accelerator with the
aid of a companion, maintain
the accelerator to be 80% or
so, and observe high pres-
sure gauge and sight
glasses until the pressure
reaches an appropriate
value (refer to attached
table). And there are no bub-
bles in sight glass.
14. First turn off all the valves,
then remove the inflating
unit.
The table below gives reference values about corresponding relation between pressure and tempera-
ture. Because the actual working pressure of air conditioning system is related to compressor speed,
sunlight intensity, evaporator air volume and other factors. Data in the table below are only for reference:

Indicating range of the high Indicating range of the low

Ambient temperature
pressure gauge pressure gauge
°C Kg.f/cm2 Kg.f/cm2
15.5°C 8.4~10.5 1.57~1.9
21.1°C 10.5~12.6 1.57~1.9
26.6°C 12.6~14 1.67~2.1
32.2°C 14~15.4 1.67~2.1
35°C 15.4~16.4 1.77~2.1
37.7°C 16.1~17.5 1.77~2.1
40.5°C 17.5~19.3 1.9~2.4
43.3°C 18.2~21.8 1.9~2.6
 6-1
January 24, 2017 Driver's Cab System
CLG835H

Driver's Cab System

Structure Function Principle ..........................................................................................6-3
Driver cab system ..................................................................................................................................6-3
Engine hood ...........................................................................................................................................6-3
Engine hood assembly.......................................................................................................................6-3
Opening and closing of engine hood..................................................................................................6-5
Lifting mechanism of engine hood torsion bar .......................................................................................6-7

Removal and Installation ..............................................................................................6-11

Installation requirements for shock cushion of cab ..............................................................................6-11
Removal and installation of cab ...........................................................................................................6-11
Disassembly order of cab lifting .......................................................................................................6-11
Removal of air conditioning components in cab...............................................................................6-11
Disassembly of hydraulic components in cab ..................................................................................6-11
Disassembly of power components in cab.......................................................................................6-18
Replacement and installation for lifting rings of head cover.............................................................6-23
Removal of shock cushion ...............................................................................................................6-23
Lift ....................................................................................................................................................6-24
Removal of the seat .............................................................................................................................6-24
Exploded view of driver seat ............................................................................................................6-24
Removal of the seat .........................................................................................................................6-26
Removal of console .............................................................................................................................6-29
Removal of decoration .........................................................................................................................6-33
Removal of the rear right positioning lock trim cover in the cab.......................................................6-33
Removal of left decoration of cab.....................................................................................................6-34
Removal of right decoration of cab ..................................................................................................6-37
Removal of decoration of rear plate .................................................................................................6-38
Removal of decoration and platform and attachment ......................................................................6-40
Top decorations of cab.....................................................................................................................6-41
Assemble the glass of cab ...................................................................................................................6-43
Installation of the left door lock in cab ..................................................................................................6-45
Removal and installation of engine hood .............................................................................................6-50
Removal and installation of the engine hood torque mechanism.........................................................6-57
6-2
Driver's Cab System January 24, 2017
CLG835H
 6-3
January 24, 2017 Structure Function Principle
CLG835H Driver cab system

Structure Function Principle

Driver cab system

The cab system mainly consists of cab assembly, steering column assembly, driver seat assembly,
protective cover console, console assembly and rear view mirror assembly. Among which some parts of
hydraulic system, electrical system and air conditioning system are assembled on cab assembly.

Engine hood

Engine hood assembly

Overview of engine hood assembly

The engine hood mainly consists of two parts: one part is that can open round the engine hood hinge;
and the other part is that fixed on the frame and radiator. The engine hood is front-hinged. The lifting
mechanism mainly includes air spring and torsion spring. The maximum opening angle of engine hood is
about 50°.

Hood

P18C00001
6-4
Structure Function Principle January 24, 2017
Engine hood CLG835H

Main components of engine hood

P18C00002

1. Bracket 15.Angle block 29.Washer

2. Bolt 16.Rear cover 30.Rod as
3. Nut 17.Plate 31.Bushing
4. Cushion 18.Rope 32.Bracket
5. Side plate-rh 19.Lock 33.Washer
6. Step 20.Bolt 34.Bushing
7. Bolt 21.Mounting plate 35.Push rod
8. Nut 22.Bolt 36.Push rod
9. Plate 23.Nut 37.Bracket
10.Pin 24.Plate 38.Torsion spring
11.Bushing 25.Side plate-lh 39.Torsion spring
12.Angle block 26.Side plate-lh 40.Bracket
13.Side plate-rh 27.Bracket
14.Bolt 28.Pin
 6-5
January 24, 2017 Structure Function Principle
CLG835H Engine hood

Precautions on removal and installation:

1. The operator for special equipments shall have corresponding operation certificate.
2. The measuring equipment and tools shall be provided with inspection certificates from metrological
service;
3. Because many other related components on the complete machine are concerned during the
removal and installation of each component, removed components (especially standard parts) shall
be reasonably placed to avoid wrong installation, neglected installation, part missing, etc. during
reassembly.
4. If the removal and installation of other components on the complete machine are concerned in the
removal and installation of each component, tools are referred to the tool list for the removal and
installation of other components and not listed in the tool list of this component;
5. If the expected effect can be reached in the ways of using open-end wrench, blower gun and socket
as well as ratchet wrench and socket to remove and install, anyone can be chosen.

Opening and closing of engine hood

Opening of engine hood

Reference picture Operation step

1. Open the lock on both sides of engine rear
hood by hand.

P18C00003

2. Grab and lift the bottom handrail of rear hood

P18C00004
6-6
Structure Function Principle January 24, 2017
Engine hood CLG835H

Reference picture Operation step

3. After the hood rises automatically, hold the
rope at the hood bottom with hand to control
the hood opening speed until it opens com-
pletely.

P18C00005

Closing of engine hood

Reference picture Operation step

1. Grab and pull down the rope until the hood bot-
tom matches with the counterweight.

P18C00006

2. Tighten the locks on the both sides.

P18C00007
 6-7
January 24, 2017 Structure Function Principle
CLG835H Engine hood

Lifting mechanism of engine hood

torsion bar

1. Overview-components and position

The components and position of lifting mecha-

nism of engine hood torsion bar used in com-
plete machine are as shown in the figure below
and mainly composed of rear cover, bracket and
torsion spring. The torsion bar-assist type turn-
over mechanism involved in the mechanism is
able to solve effectively the problem of difficult
closing caused by large turning torque during the
turning of torsion bar turnover mechanism, and
the provided torsion bar-assist type turnover
mechanism includes the base and the turning 9 P18C00009
parts hinged on the base. The base is provided
with torsion bar, which is mutual parallel to the 1. Rear cover 6. Torsion spring - left
2. Bracket 7. Bracket
center of rotation of mentioned turning parts with 3. Plate 8. Push rod
its one end permanently connected to the base, 4. Push rod 9. Rod as
while the other end rotates relative to base and 5. Torsion spring - right
permanently connected to lever arm; moreover, it
includes link, one end of which is hinged with 2. Overview - part working principle
lever arm, while the other end hinged with turn-
ing parts. The base, lever arm, link and turning When the torsion bar-assist type turnover mech-
parts in the torsion bar turnover mechanism anism used in this model is used on the engine
forms four-bar mechanism. hood of machine,the base acts as frame and the
turning parts act as hood; the base, lever arm,
1
link and turning parts forms four-bar mechanism;
the distance between point A and C increases
2 gradually to improve the torque in the later stage
3 during the turning process for opening the hood;
4 while the distance between point A and C
decreases gradually to reduce the torque of the
torsion bar against the turning part, i.e reducing
the tensile force necessary for closing the engine
hood to make easy closing of hood during the
turning process for closing the hood.
5
6 Figure 1 is the structure diagram that the torsion
7 bar-assist type turnover mechanism is used on
8
9 P18C00008 the hood of machine;
Figure 2 is the structure diagram of the torsion
bar-assist type turnover mechanism;
Figure 3 is the structure diagram of link with
adjustable length;
Figure 4 is the relation diagram of rear cover
opening angle vs required torque.
6-8
Structure Function Principle January 24, 2017
Engine hood CLG835H

Component name and serial number in the fig- Figure 2

ure;
Rear cover 1, torsion bar 2, base 3, lever arm 4,
link 5, turning part 7.
Figure 1

P18C00011

Figure 3

1 P18C00012

P18C00010

Figure 4
rear cover and output torque of lifting mechanism
Difference between gravity moment of

Rear cover opening angle

P18C00013
 6-9
January 24, 2017 Structure Function Principle
CLG835H Engine hood

As shown in the figure 2, the torsion bar-assist In this example, under the condition that the
type turnover mechanism includes base 3, the specification of torsion bar is not changed, sev-
turning part 7 hinged on the base 3, which is pro- eral opening and closing force requirements of
vided with torsion bar2, which is mutual parallel rear cover can be met through changing the
to the center of rotation of turning part 7, one end effective length of lever arm, and in case of used
of torsion bar 2 is permanently connected to for opening the different weight of rear cover, the
base 3, and the device for adjusting the initial change of effective length of lever arm can be
torque of torsion bar can be installed at this end, achieved through the two methods below.
while the other end rotates relative to base and is
First method: the size of lever arm can be
provided with spline by which permanently con-
changed through changing the length of link 5
nected to lever arm 4; the link 5 is connected
and if the link 5 uses screw mouth, whose struc-
between the free end of lever arm 4 and turning
ture is as shown in figure 3, the distance L
part 7, one end of link 5 is hinged with lever arm
between left U screw rod (left-handed thread)
5 and the other end is hinged with turning part 7.
and right U screw rod (right-handed thread) of
As shown in figure 2, the connection point of tor- the thread can be adjusted by rotating the screw
sion bar 2 and lever arm 4 is point A, the articu- bushing and thus to change the length of link 5.
lated joint of lever arm 4 and link 5 is point B,
Second method: the adjusting mechanism is pro-
articulated joint of link 5 and turning part 7 is
vided with long round hole at end of lever arm
point C, articulated joint of turning part 7 and
and locking mechanism, the length direction of
base 3 is point D, and this four points form con-
long round hole is the same with that of lever
vex quadrangle. The included angle formed by
arm, articulated shaft of link and lever arm is
link 5 and lever arm 4 is acute angle. When the
located in the mentioned long round hole and
lever arm 4 rotates counterclockwise around the
can move along the length direction of long
point A, i.e the hood is being opened, the dis-
round hole, and the mentioned locking mecha-
tance between point A and C increases gradu-
nism is used for locking the position of position-
ally, and included angle formed between CB and
ing articulated shaft in the long round hole.
DC is reduced gradually to right angle from
obtuse angle and thus to improve the torque in The Figure 4 shows the difference between grav-
the later stage during the turning process for ity moment of rear cover and output torque of lift-
opening the hood; when the lever arm rotates ing mechanism, and the difference refers to the
clockwise around point A, i.e the hood is being force applied by operator when opening or clos-
closed, the distance between point A and C ing the rear cover. 0°indicates the close state of
decreases gradually, and included angle formed rear cover, 55°indicates the open state of rear
between CB and DC is increased gradually from cover. As can be seen from the figure, when the
obtuse angle to reduce the torque of the torsion rear cover is closed from 55°to 0°, the difference
bar against the turning part, i.e reducing the ten- between both is decreased gradually to make
sile force necessary for closing the engine hood easy closing of engine hood.
to make easy closing of hood. When the rear
cover is opened and closed, the torsion bar-
assist type turnover mechanism can provide the
turning part of stable torque, whose curve has
the good consistency of matching with gravity
moment of turning part.
6-10
Removal and Installation January 24, 2017
Installation requirements for shock cushion of cab CLG835H

Removal and Installation Removal of air conditioning

components in cab
Installation requirements for Disassembly of air conditioning connector
shock cushion of cab

The cushion of cab is installed with M30 bolts

and #46 torque wrench, torque value: tightening
torque (dry state) = 1055 N·m.

Removal and installation of cab

Disassembly order of cab lifting

1. Remove A/C components →remove hydrau- When removing

lic components → remove power compo- the driver cab,
nents → remove electrical components → these four A/C
poles shall be
replace lifting rings of head cover → remove removed
cushion → lift.
2. Step of installing cab onto machine: install it P18C00014
by the opposite steps of removal.
Fluoridation of air conditioning

For fluoridation of air conditioning, refer to the

section of air conditioning in this manual.

Disassembly of hydraulic components

in cab

Remove brake pedal

1. Removal steps of brake valve from the

machine:

Before removing brake valve, make sure that

the machine is in parking brake state.
 6-11
January 24, 2017 Removal and Installation
CLG835H Removal and installation of cab

Figures Operation step Tools

1. Mark the two hoses con-
necting brake valve as "P1"
and "P2" respectively. Pay
attention to that the mark-
ings shall be firm.
Tool: 27# Open-
2. Loosen the joints of two end wrench
hoses.

P18C00015

3. Unscrew the 4 bolts tighten-

ing the brake valve.

Tool:
16#Wrench

P18C00016

4. Take out the brake valve

from the bottom of cab.
5. Shield the port of brake
valve and store it in dry and
clean place.

P18C00017

2. Step of installing brake valve onto machine: install it by the opposite steps of removal.
6-12
Removal and Installation January 24, 2017
Removal and installation of cab CLG835H

Remove console hydraulic system

1. Steps to remove the pilot valve from the machine:

First, remove all the pilot lines.

Figures Operation step Tools

1. Pull out the housing

P18C00018

2. Remove the parking brake

solenoid switch

P18C00019
 6-13
January 24, 2017 Removal and Installation
CLG835H Removal and installation of cab

Figures Operation step Tools

3. Remove the operating han-
dle and take out the armrest
upward

P18C00020

4. Screw off 4 screws and 2

bolts, and then remove the
upper housing.
Tool: cross
screwdriver, M6
inner hexagon
spanner

P18C00021
5. Remove 4 M6 captive bolts
with #10 open-end wrench,
and remove the pilot valve
from the console housing.

Tool:
10#Wrench

P18C00022
6-14
Removal and Installation January 24, 2017
Removal and installation of cab CLG835H

Figures Operation step Tools

6. Screw out pilot shutoff valve
nuts as tightened in the left
lower figure, and remove
shut-off valve.

Tool: 21# wrench

P18C00023

2. Step of installing pilot operating valve onto machine: install it by the opposite steps of
removal.

Removal of metering pump

Figures Operation step Tools

1. Screw out 4 M10 bolts tight-
ening metering pump,
remove the metering pump
and move it out of cab.

Tool:
16#Wrench

P18C00024
 6-15
January 24, 2017 Removal and Installation
CLG835H Removal and installation of cab

Maintenance of hydraulic parts

Seat needs to be removed for maintenance of hydraulic parts. The procedures are as follows:

Figures Operation step Tools

1. Screw out 4 M8 bolts tight-
ening seat and remove seat.

Tool:
13#Wrench

P18C00025

2. Screw out 4 M10 bolts tight-

ening shield and remove the
shield.

Tool:
16#Wrench

P18C00026

3. Screw out 8 M8 bolts tight-

ening shield and remove the
bottom plate.

Tool: #13 wrench

P18C00027
6-16
Removal and Installation January 24, 2017
Removal and installation of cab CLG835H

Figures Operation step Tools

4. Repair the hydraulic compo-
nents

P18C00028

Disassembly of power components in cab

Removal of accelerator control system

Figures Operation step Tools

1. Unplug the harness connec-
tor of electronic accelerator

P18C00029

2. Lift up floor mat, remove 4

captive bolts on accelerator
control system, and remove
the accelerator control sys-
tem.
Tool:
Open-end
wrench 16#

P18C00030
 6-17
January 24, 2017 Removal and Installation
CLG835H Removal and installation of cab

Installation of accelerator control system

Installation of accelerator control system: install it by the opposite steps of removal.

Adjustment of accelerator control system

Normally, after the accelerator pedal is installed, the accelerator pedal can be operated smoothly and the
normal operating condition of engine can be guaranteed. For the cases that the accelerator pedal is diffi-
cult to operate, the accelerator pedal cannot reach its maximum position or accelerator pedal does not
return, check the installation procedures above until it can be operated smoothly.

Removal of electric appliance components in cab

The power of vehicle must be turned off before disassembling the electric appliance compo-
nents. The power (-) of the whole machine is disconnected when the negative switch is turned to
"O" (OFF). The power (-) of the whole machine is connected when the negative switch is turned to
"I" (ON).

P18C00031
6-18
Removal and Installation January 24, 2017
Removal and installation of cab CLG835H

Figures Operation step Tools

1. Screw out the earthing cable
on the front cab mounting
bracket-rh.

P18C00032

2. Pull out the ZF transmission

speed sensor on the trans-
mission-lh.

P18C00033
3. Pull out the connecting
water pipe of the washer
reservoir at the left ladder
case.

P18C00034
 6-19
January 24, 2017 Removal and Installation
CLG835H Removal and installation of cab

Figures Operation step Tools

4. Pull out the shift control
solenoid connector on the
transmission-rh.

P18C00035
5. Unplug the 4 rear frame har-
ness connectors on the left
mounting bracket of cab and
loosen the fixing ring nut fix-
ing the harness.

Tool:
Open-end
wrench 16#

P18C00036

6. Unplug the 1 front frame

harness connectors on the
right mounting bracket of
cab and loosen the fixing
ring nut fixing the harness.

Tool:
Open-end
wrench 16#

P18C00037
6-20
Removal and Installation January 24, 2017
Removal and installation of cab CLG835H

Replacement and installation for lifting rings of head cover

Figures Operation step Tools

Tool:
Loosen 4 M16 bolts and replace
and install M16 lifting rings. Open-end
wrench 24#

P18C00038

Removal of shock cushion

1. Steps to removing the shock cushion from the machine:

Before removing cushion, make sure that the machine is in parking brake state.

Figures Operation step Tools

The cushion of cab is installed

with M30 bolts which are Tool:
screwed out with #46 torque
wrench. Mounting torque value: Open-end
tightening torque (dry state) = wrench 46#
1055 N.m.

P18C00039

2. Step of installing shock cushion onto machine: install it by the opposite steps of removal.
 6-21
January 24, 2017 Removal and Installation
CLG835H Removal of the seat

Lift

Install M16 lifting rings on the cover of cab and lift the cab.

Removal of the seat

Exploded view of driver seat

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35C0877
2

3 ᢬ᢁ
34C3671

4
ᓝ䶖ᙱᡆ
14A7067

5ࠅ䴽ᷬ
47C1358

᭥ᓝ 1 6᭥ᓝᓋᶵ
14A7069
14A706B
7 ┇䖞
2048536
8 ᆿ㻻ᓋᶵ
LZY-LGZ6804001-1

P18C00040

1. Bracket(14A7068) 4. Backrest as(14A7067) 7. Slide rail(2048536)

2. Headrest(35C0877) 5. Shock absorption frame(47C1358) 8. Install the floor mat(LZY-
3. Handrail(34C3671) 6. Bracket bottom plate(14A7069) LG6804001-1)
6-22
Removal and Installation January 24, 2017
Removal of the seat CLG835H

P18C00041

The seat consists of headrest, handrail, base assembly, shock mount, bracket, bracket bottom plate,
slide rail and mounting bottom plate.
 6-23
January 24, 2017 Removal and Installation
CLG835H Removal of the seat

Removal of the seat

1. Removal steps of the seat:

Figures Operation step Tools

1. As the headrest is not lim-
ited by any fasteners and
bayonets, so it can be
removed by pulling out by
hands directly.
2. Insert the rod of headrest
aligning with the hole during
assembly.

P18C00042

3. Screw out two M8 cap nuts

on the side of handrail, and
the handrail can be
removed.

Tool:
13#Wrench

P18C00043
6-24
Removal and Installation January 24, 2017
Removal of the seat CLG835H

Figures Operation step Tools

4. Remove the clamp from the
dust cover by hand.
5. Remove four M8 bolts from
shock mount with #13
wrench and the backrest
assembly can be removed.

P18C00044 Tool:
13#Wrench

P18C00045

6. Slide the seat forward;

remove the two M8 inner
hexagon bolts from the
shock mount lower part.
7. Slide the seat rearward;
remove the two M8 inner Tool:
hexagon bolts from the M8 inner hexa-
shock mount lower part. The gon spanner
shock mount can be
removed then.

P18C00046
 6-25
January 24, 2017 Removal and Installation
CLG835H Removal of the seat

Figures Operation step Tools

8. Unscrew the upper bolts of
slide rail. (Slide the slide rail
forward and remove the two
front bolts; slide backward
and remove the two rear
bolts.)

Tool:
13#Wrench

P18C00047

9. Unscrew the lower bolts of

slide rail. (Bolt head is under
mounting base plate)

Tool:
#5 inner hexa-
gon spanner

P18C00048
6-26
Removal and Installation January 24, 2017
Removal of console CLG835H

Figures Operation step Tools

10. Unscrew the upper M12
bolts of slide rail. (Slide the
slide rail forward and
remove the two front bolts;
slide backward and remove
the two rear bolts.)

Tool:
18# Socket
wrench

P18C00049

2. Step of installing seat onto machine: install it by the opposite steps of removal.

Removal of console

1. Removal steps of armrest:

Figures Operation step Tools

1. Remove the M10 bolts on
seat support and the con-
sole can be removed
entirely.

Tool:
13#Wrench

P18C00050
 6-27
January 24, 2017 Removal and Installation
CLG835H Removal of console

Figures Operation step Tools

2. Pull out the housing,
3. Remove the parking brake
solenoid

P18C00051

P18C00052
6-28
Removal and Installation January 24, 2017
Removal of console CLG835H

Figures Operation step Tools

4. Remove adjusting lever on
the side of console and then
the armrest cushion can be
removed by pulling upward.

P18C00053

5. Screw out two M6 bolts on

support angle block of hand-
rail.

Tool:
10#Wrench

P18C00054

6. Remove the 4 screws and 2

bolts around housing, and
then the upper housing can
be removed.
Tool:
cross screw-
driver, M6 inner
hexagon span-
ner

P18C00055
 6-29
January 24, 2017 Removal and Installation
CLG835H Removal of console

Figures Operation step Tools

7. Screw out the 4 screws on
the lower housing and the
lower housing can be
Tool:
removed.
M6 inner hexa-
gon spanner, 8#
open-end
wrench

P18C00056

8. Screw out 4 M6 bolts as

tightened in the left figure,
and then remove the pilot
lever.

Tool:
10# Open-end
wrench

P18C00057

9. Screw out pilot shutoff valve

nuts as tightened in the left
lower figure.

Tool:
21# Open-end
wrench

P18C00058

2. Step of installing console onto machine: install it by the opposite steps of removal.
6-30
Removal and Installation January 24, 2017
Removal of decoration CLG835H

Removal of decoration

Removal of the rear right positioning lock trim cover in the cab

Figures Operation step Tools

1. Screw out three setscrews
on window-rh fixing lock
cover and remove the cover.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00059
2. Screw out two countersunk
bolts on window-rh position-
ing lock cover.

Tool:
Screwdriver for
countersunk bolt
2 100P QB/
T2564.5-2002

P18C00060
3. Screw out the set inflating
screws on cover and
remove the cover.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00061
 6-31
January 24, 2017 Removal and Installation
CLG835H Removal of decoration

Removal of left decoration of cab

Figures Operation step Tools

1. Loosen and remove the
mounting bolt of fire extin-
guisher.

Tool:
10#Wrench

P18C00062
2. Remove the floor mat
directly from the cab.

P18C00063
6-32
Removal and Installation January 24, 2017
Removal of decoration CLG835H

Figures Operation step Tools

3. Screw off the 2 cross
recessed screws from the
cup mounting support.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00064

4. Screw off the screws from

the left front and left rear
decoration and then remove
the decoration.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00065
 6-33
January 24, 2017 Removal and Installation
CLG835H Removal of decoration

Figures Operation step Tools

5. Remove the left door plate.
Left door plate

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00066

6. Remove the set inflating

screws and setscrews on
Shield-lh door shield-lh and remove
the shield-lh.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00067
6-34
Removal and Installation January 24, 2017
Removal of decoration CLG835H

Removal of right decoration of cab

Figures Operation step Tools

1. Remove the set inflating
screws on right front&rear
decorations and remove the
right front&rear decorations.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00068

2. Remove the set inflating

screws and mounting bolts
on the right side decorations
and remove the right side
decorations.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002, 6# Open-
end wrench

P18C00069
 6-35
January 24, 2017 Removal and Installation
CLG835H Removal of decoration

Figures Operation step Tools

3. Remove the set inflating
screws on the right front side
decorations and remove the
right side decorations.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00070

Removal of decoration of rear plate

Figures Operation step Tools

1. Remove two setscrews on
access door by hands and
remove the access door.

P18C00071
2. Remove the 8 inflating
screws on the rear wall
guard plate decoration and
remove the rear wall guard
plate decoration. Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00072
6-36
Removal and Installation January 24, 2017
Removal of decoration CLG835H

Figures Operation step Tools

3. Remove the 3 set inflating
screws on the decorations of
rear plate-lh and remove the
decorations of rear plate-lh.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00073

4. Remove the 4 bolts and 3

inflating screws on the deco-
rations of rear plate-rh and
remove the decorations of Tool:
rear plate-rh. Cross-screw-
driver 2 100P
QB/T2564.5-
2002, 6# Open-
end wrench

P18C00074

5. Remove the 5 bolts and 3

inflating screws on the deco-
rations of rear plate-lh and
remove the decorations of
rear plate-lh.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002, 6# Open-
end wrench

P18C00075
 6-37
January 24, 2017 Removal and Installation
CLG835H Removal of decoration

Removal of decoration and platform and attachment

Figures Operation step Tools

1. Remove the 7 set inflating
screws on front decorations-
lh and remove the front dec-
orations-lh.

Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00076

2. Remove the 6 set inflating

screws on front decorations-
rh and remove the front dec-
orations-rh.
Tool:
Cross-screw-
driver 2 100P
QB/T2564.5-
2002

P18C00077

3. Remove the captive bolts on

the platform decoration and
remove the platform.

Tool:
Screwdriver for
countersunk bolt

P18C00078
6-38
Removal and Installation January 24, 2017
Removal of decoration CLG835H

Top decorations of cab

Figures Operation step Tools

Tool:
Cross-screw-
driver 2 100P
Remove the 12 setscrews on
QB/T2564.5-
the top decorations and remove
2002
the top decorations.
Tool: Clean non-
woven, Sika
primer.

P18C00079
 6-39
January 24, 2017 Removal and Installation
CLG835H Assemble the glass of cab

Assemble the glass of cab

1. Installation steps for glass:

Before installing the glass, be sure that the machine is in parking brake state.

Figures Operation step Tools

1. Cleaning: dip a few amount
of special activating agent
with clean non-woven
fabrics, and wipe the
bonding position of steel
window frame in one
direction.
2. Prime coat: Shake the Sika Tool: Clean non-
primer sufficiently until the woven, Sika
rolling of small ball inside the primer.
bottle can be heard, and
continue shaking for another
one minute. Wear protective
gloves and apply a circle of
Clean and apply the base coat on it. primer evenly on the glass-
P18C00080 bonded surface of window
frame with a clean brush
free of dead hairs.
3. Apply adhesive: wear
protective gloves, apply Sika
adhesive evenly to the glass
bonding position or the
bonding position of steel
window frame with the
surface treated along glass
border, and make
continuous triangular Tool:
adhesive bead. Sika glue

Gluing
P18C00081
6-40
Removal and Installation January 24, 2017
Assemble the glass of cab CLG835H

Figures Operation step Tools

4. Put rubber blocks: insert
rubber blocks at the inside of
adhesive applying layer
along the bottom at an inter-
val of 30~35cm

Tool:
Rubber limit
block

Limit gommures Assist to affix the glass with

sucker
P18C00082

5. Bond glass: assist in install-

ing the side glass with glass
sucker and then installing
the middle glass. Bond the
glass to the steel window
frame symmetrically, and
apply pressure to bond
glass, rubber blocks and
steel window frame together
closely. Pay attention that Tool:
the gap between middle
Glass sucker
glass and side glass shall be
about 8mm. Meanwhile fix Seal
all the glass with adhesive
tape until the viscose dries.

Fix with adhesive tape after stickup

P18C00083
 6-41
January 24, 2017 Removal and Installation
CLG835H Installation of the left door lock in cab

Figures Operation step Tools

6. Glass joint filler: bond the
color separation paper on
both sides of adjacent glass
edge, about 5mm away from
the glass edge, and keep
the spacing formed by color
separation papers on both
sides consistent from up to
down; Meanwhile, seal the
inside of glass joint with
color separation paper to Tool:
avoid rugged adhesive on
the back when filling Seal
adhesive. After applying
adhesive, flatten with self-
made rubber plate.

Glass gap filling sealant: One

line each on left and right for
both front and rear glasses

P18C00084

Technical requirements: The speed of applying adhesive shall be even and the triangular adhesive
bead shall be uniform without lumps or breakpoints. Insertion depth is 2mm. The rubber blocks shall not
be placed within the scope of 10cm from corner point. The block shall not separate the adhesive bead.
Flatten excessive glue of sheet metal side not receiving filler treatment, and no excessive adhesive
shall remain.

Installation of the left door lock in cab

Before installing the left door lock, be sure that the machine is in parking brake state.
6-42
Removal and Installation January 24, 2017
Installation of the left door lock in cab CLG835H

Figures Operation step Tools

1. Check: check whether the
left door lock parts are com-
plete and in good condition
or not.
2. Installation of lock block:
Install lock block in the
appropriate location of the Tool:
door, and fix it with M6×16 Cross screw-
screw. driver
Caution: The setscrews
must be tightened with-
out looseness.

P18C00085

3. Installation of outside han-

dle, mounting plate and pad:
Install outside handle and
mounting plate, pad in the
appropriate location of the
door together, and then fix Tool:
them with M6×20 screw. The Cross screw-
setscrews must be tightened driver
without looseness.

P18C00086

4. Installation of adapter plate:

Fix it with M6×16 screw, and
setscrews must be tightened
without looseness.

Tool:
Cross screw-
driver

P18C00087
 6-43
January 24, 2017 Removal and Installation
CLG835H Installation of the left door lock in cab

Figures Operation step Tools

5. Installation of shim and lock
buckle: Fix it with M8×20
screw after adjusting the
lock buckle to the best lock-
ing position. Setscrews must
be tightened without loose-
ness. Tool:
Cross screw-
driver

P18C00088

6. Installation of inside handle

in the left door locating lock:
Fix it with screw, and set-
screws must be tightened
without looseness.
Tool:
Cross screw-
driver

P18C00089

7. Adjust the mounting plate:

Install the link in natural
state into the mounting
plate.
Caution: Adjust the
screw cap to the best
position, and install it into the
mounting plate. The link
needs to be left the movement
clearance as 1-1.5mm.
After installing the link, test
the opening flexibility of out-
side handle by hand, and
P18C00090 locking and opening in natu-
ral state should be flexible
and spontaneous.
6-44
Removal and Installation January 24, 2017
Installation of the left door lock in cab CLG835H

Figures Operation step Tools

8. Adjustment of the inside
handle in the left door
locating lock: Connect the
inside handle cable with the
left door locating lock with
adapter plate.
Caution:The setscrews
must be tightened
without looseness.
After fixing the cable and
adapter plate, the adapter
P18C00091 plate should be left the
natural movement clearance
as 1-2mm.
9. After installation, thoroughly
check whether transmission,
opening and locking of each
parts of door lock are flexible
or not.

P18C00092
 6-45
January 24, 2017 Removal and Installation
CLG835H Removal and installation of engine hood

Removal and installation of engine hood

Removal of engine hood:

Reference picture Operation step Tools required

1. Remove the mounting bolts
of the left/right shield (sym-
metrical on both sides, 6 in
total) with wrench, remove
the left/right shield and place
them on the level ground.

P18C00093
Tool:
16#Wrench

P18C00094

2. Open the engine hood to the

maximum angle, remove the
harness connectors of
license plate light, rear view
camera.
Hold the rear lifting points of Tool:
rear cover with crane, lifting Sling (1t), lifting
rings, etc. ring (2×M16)

P18C00095
6-46
Removal and Installation January 24, 2017
Removal and installation of engine hood CLG835H

Reference picture Operation step Tools required

3. Remove the bolt assembly
of torsion spring at left and
right sides of engine hood.

P18C00096 Tool:
24# Wrench

P18C00097

4. Remove the link bolts at left

and right sides of engine
rear hood and 4 in total.
Remove the captive bolts (2
in total) of hinge pin at left
and right sides of engine
rear hood and knock out the
pin.

P18C00098
 6-47
January 24, 2017 Removal and Installation
CLG835H Removal and installation of engine hood

Reference picture Operation step Tools required

5. Lift the engine rear hood out
slowly and place it on the
level ground.

Tool:
Traveling crane
Sling

P18C00099

6. Remove the 4 captive bolts

from exhaust pipe tail sec-
tion and remove the exhaust
pipe.

Tool:
Open-end
wrench 13#

P18C00100

7. Remove the anchor bolts (4

in total) at left front and right
front sides of engine upper
hood bracket.

Tool:
Open-end
wrench 19#

P18C00101
6-48
Removal and Installation January 24, 2017
Removal and installation of engine hood CLG835H

Reference picture Operation step Tools required

8. Remove the captive bolts (4
in total) at left rear and right
rear sides of engine upper
hood bracket.

Tool:
Open-end
wrench 19#

P18C00102

9. Lift up the upper hood slowly

and place it on the level
ground

Tool:
Traveling crane
Sling

P18C00103
 6-49
January 24, 2017 Removal and Installation
CLG835H Removal and installation of engine hood

Installation of engine hood

Step of installing engine hood onto machine: install it by the opposite steps of removal.

Reference picture Operation step Tools required

1. Lift and install the rear hood
and hinge support together
to the complete machine
with a sling, a overhead
crane, etc.

Sling (1t)

P18C00104

2. After adjusting the position

of hood, install the bolts of
hood hinge support to the
brackets on the left and right
sides of hood with 16#
wrench and tighten them.

16# Wrench

P18C00105

3. Operate the overhead crane

to lift and open the rear hood
to an angle about 50°

Sling (1t)

P18C00106
6-50
Removal and Installation January 24, 2017
Removal and installation of engine hood CLG835H

Reference picture Operation step Tools required

4. Pass the torsion spring
through the hinge support
from both sides respec-
tively,where the torsion
spring- left is at bottom while
the torsion spring - right is at
top.

P18C00107

5. Adjust the position of torsion

spring and slowly lock the
torsion spring with bolts and
nuts, during which try to
loosen the lifting point and
the overhead crane can be
removed when the opening
angle of hood is kept
between 50°-52°without #Wrench
changing.

P18C00108
 6-51
January 24, 2017 Removal and Installation
CLG835H Removal and installation of engine hood

Reference picture Operation step Tools required

6. Pull down the lock along
with the direction of arrow to
close the engine hood
slowly until the pull force is
nearly the same with that of
hood before removal and
installation and the hood
adjustment is completed,
and if the pull force is too
large, the nut and bolt lock-
ing the torsion spring can be
properly loosened under the
condition of ensuring about
50° opening of engine hood
and if the hood is opened
less than 50°, the nut and
bolt locking the torsion
P18C00109 spring can be further tight- #Wrench
ened

P18C00110
6-52
Removal and Installation January 24, 2017
Removal and installation of the engine hood torque mechanism CLG835H

Reference picture Operation step Tools required

7. Install the pedals-lh and rh
and shields-lh and rh and
tighten the mounting bolts
with 13# wrench (symmetri-
cal on both sides, 4 in total).

13#Wrench

P18C00111

Removal and installation of the engine hood torque mechanism

Disassembly of lifting mechanism of torsion bar

Reference picture Operation step Tools required

1. Refer toRemoval of engine
hood:
2. Remove the left and right
torsion spring from both
sides respectively.

P18C00112
 6-53
January 24, 2017 Removal and Installation
CLG835H Removal and installation of the engine hood torque mechanism

Reference picture Operation step Tools required

3. Remove the push rod at left
and right sides

P18C00113

4. Remove the bolts from the

engine hood hinge support
with 16# wrench (symmetri-
cal on both sides, 10 in
total).

16#Wrench

P18C00114

5. Lift and place the left and

right support on the level
ground with overhead crane.

Overhead crane
(1t), Manila rope

P18C00115
6-54
Removal and Installation January 24, 2017
Removal and installation of the engine hood torque mechanism CLG835H

Installation of lifting mechanism of torsion

bar

Reference picture Operation step Tools required

1. Lift and place the left and
right support on the
mounting position with
overhead crane.

Overhead crane
(1t), Manila rope

P18C00116

2. Tighten the bolts of the

engine hood hinge support
with 16# wrench
(symmetrical on both sides,
10 in total).

16#Wrench

P18C00117

3. Place the left and right push

rods at the mounting
position.

P18C00118
 6-55
January 24, 2017 Removal and Installation
CLG835H Removal and installation of the engine hood torque mechanism

Reference picture Operation step Tools required

4. Pass the torsion spring
through the hinge support
from left and right sides
respectively,where the
torsion spring- left is at
bottom while the torsion
spring - right is at top.
Copper bar

P18C00119

5. Refer toInstallation of engine

16#Wrench
hood
6-56
Removal and Installation January 24, 2017
Removal and installation of the engine hood torque mechanism CLG835H
 7-1
January 24, 2017 Structure
CLG835H

Structure
Structure Function Principle ..........................................................................................7-3
Frame system ........................................................................................................................................7-3
Articulated hitch .....................................................................................................................................7-4
Counterweight assembly........................................................................................................................7-5
Work implement .....................................................................................................................................7-6
The parameters of work implement....................................................................................................7-6
Overview and configuration scheme of work implement system ......................................................7-6
Work implement limit system .................................................................................................................7-8

Removal and Installation ................................................................................................7-9

Removal and installation of hinge assembly ..........................................................................................7-9
Removal and installation of counterweight assembly ..........................................................................7-21
Removal and installation of work implement system ...........................................................................7-23
Removal and installation of linkage..................................................................................................7-23
Removal and installation of bucket lever..........................................................................................7-27
Removal and installation of the boom ..............................................................................................7-31
Replacement of work implement bushing ........................................................................................7-36
Removal and installation of accessory system ................................................................................7-39
Removal and installation of quick coupler bucket and quick coupler frame.....................................7-46
Replacement of bucket movable blade, movable tooth and tip........................................................7-55
Option work implement and accessory system....................................................................................7-57
Option of work implement system ....................................................................................................7-57
Option of accessory system .............................................................................................................7-57
7-2
Structure January 24, 2017
CLG835H
 7-3
January 24, 2017 Structure Function Principle
CLG835H Frame system

Structure Function Principle

Frame system

Frame overview

The frame system includes front frame and rear frame. Front frame is of a welded frame structure, which
is mainly used for installing front axle system, work implement system, etc. Rear frame is of a welded
frame structure, which is mainly used for installing engine system, transmission & torque converter
system, rear axle assembly, cooling system, engine hood assembly, counterweight, etc.

Frame configuration scheme

Frame system

1 2

P18S00001
1. Front frame 2. Rear frame
7-4
Structure Function Principle January 24, 2017
Articulated hitch CLG835H

Articulated hitch

Overview and configuration scheme of hinge assembly

The hinge assembly is the key part to connect front frame and rear frame and make front and rear
frames to function in relatively steering.

P18S00002
1. Bolt 10.Bolt 19.Bearing cover
2. Washer 11.Bolt 20.Shim
3. Plate 12.Bearing cover 21.Seal ring
4. Lower hinge pin 13.Shim 22.Spacer sleeve
5. Hinge pin 14.Seal ring 23.Tapered roller bearing
6. Shim 15.Tapered roller bearing 24.Spacer sleeve
7. Pin-on-disk 16.Grease fitting 25.Seal ring
8. Bolt 17.Bearing cover 26.Bearing cover
9. Washer 18.Bolt
 7-5
January 24, 2017 Structure Function Principle
CLG835H Counterweight assembly

Counterweight assembly

Overview and configuration scheme of counterweight assembly

Counterweight assembly is mainly connected and installed on both sides of rear frame tail by bolts, and
mainly used for installing the battery, disconnect switch, rear floodlight, etc.

4
4

4
4

1 2 3
P18S00003
1. Counterweight assembly 3. Washer
2. Bolt 4. Plug

Note: If it is necessary to remove and install left and right battery boxes, first take out plug (4), and then
install 4 M24 lifting screws that are used for lifting left and right battery boxes.
7-6
Structure Function Principle January 24, 2017
Work implement CLG835H

Work implement

The parameters of work implement

Standard Extension
Standard boom+1.9 Extension boom
boom+general boom+general
Items square quick cou- +1.9 square quick
bucket of 1.9 cubic bucket of 1.9 cubic
pler bucket coupler bucket
meters meters
Dumping height 2650mm/ 104in 2762mm/ 108in 2930mm/ 115 in 3043mm/ 120in
Dumping reach 1150mm/ 45in 1050mm/ 41in 1157mm/ 45in 1058mm/ 42in
Breakout force of the
85KN/ 19kips 100KN/ 22kips 83KN/ 18kips 98KN/ 22kips
bucket
Breakout force of the
71KN/ 16kips 78KN/ 17kips 64KN/ 14kips 70KN/ 16kips
boom

Overview and configuration scheme of work implement system

Work implement is a reverse six-link mechanism, which is critical part for the whole loader to finish the
motions of loading, transportation, discharge, etc., the bucket is installed on the front end of work
implement, and the rear end is connected with front frame by the pin.
 7-7
January 24, 2017 Structure Function Principle
CLG835H Work implement

Work implement system

P18S00004

1. Boom 5. The middle pin of rocker arm 9. Cushion cover

2. Rocker arm 6. Pin assembly 10.Bolt
3. Linkage 7. Washer 11.O-ring
4. Pin 8. Bolt 12.Oil cup

Notes: For each hinge pin of work implement, the shim with appropriate thickness shall be selected
according to assembly clearance to make sure clearance at one side is less than 1mm/0.04in.
7-8
Structure Function Principle January 24, 2017
Work implement limit system CLG835H

Work implement limit system

Work implement limit system is mainly to limit cylinder stroke so as to protect the cylinder and overall
work implement.
Diagram of standard boom limit system

P18S00005
1. Plate group 4. Block 6. Block group
2. Rubber 5. Bolt 7. Bolt
3. Socket

Notes: For each hinge pin of work implement, the shim with appropriate thickness shall be selected
according to assembly clearance to make sure clearance at one side is less than 1mm/0.04in.
Assembly requirements for limiting system of work implement (Note: take standard boom as an example
here):
 7-9
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

1. When the lower pin of bucket is 500mm/20in from the ground, turn up the bucket to form an angle of
48° with horizontal plane, then select the plate with appropriate thickness in plate groups (1) to install
it on plane C according to the clearance between planes C and D, and guarantee block group (4)
clings with plane D after installation.
2. When the pin is 3,660mm/144in from the ground, and the discharge angle is 45°, select block with
appropriate thickness in block groups (6) to install it on plane A according to the clearance between
planes A and B, and guarantee it clings with plane B.

Removal and Installation

Removal and installation of hinge assembly

Removal of hinge assembly

Removal description:Before removing hinge assembly, please remove bucket assembly, work implement
assembly, front axle assembly, cab assembly, engine assembly, transmission assembly, radiator assem-
bly, cover assembly, counterweight assembly, hydraulic system, electrical system, etc., and only reserve
front frame, rear frame, rear axle assembly and tire.

Figures Operation instruction Tools

1. Pad the front and rear ends
of rear frame with special
firm tooling to make sure
rear frame is in level, safe
and steady state (the front
end of rear frame is 660mm/
25.98in from the ground,
Ground
and the rear end is 980mm/
P18S00006
38.58in from the ground)
2. Hook the front frame by a
lifting appliance and tighten
the hanger slightly
CAUTION: The
personnel operating Hoisting equip-
lifting equipment shall have ment (over 5ton)
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7-10
Removal and Installation January 24, 2017
Removal and installation of hinge assembly CLG835H

Figures Operation instruction Tools

3. Install steering fixed link to
prevent front and rear
frames rotating.
Nipping pliers

P18S00007

4. Remove upper hinge pin

1) Remove the upper hinge
captive bolt and take down
the cover plate

18# Wrench

P18S00008

2) Knock out the upper hinge

pin with pin knocking tooling
and sledge hammer

Pin knocking
tooling and
sledge hammer

P18S00009
 7-11
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

Figures Operation instruction Tools

5. Remove lower pin
1) Remove the captive bolt of
the lower hinge lock plate
and take off the plate

18#, 24#
Wrench

P18S00010

2) Knock out the lower hinge

pin with pin knocking tooling
and sledge hammer

Pin knocking
tooling and
sledge hammer

P18S00011
3) Remove the spacer sleeve

Removal tooling
of spacer sleeve

P18S00012
7-12
Removal and Installation January 24, 2017
Removal and installation of hinge assembly CLG835H

Figures Operation instruction Tools

6. Remove steering fixed link,
and lift the front frame out
with lifting equipment and
place on firm ground
CAUTION: The
personnel operating Hoisting equip-
lifting equipment shall have ment (over 5ton)
relevant qualifications, and
P18S00013
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7. Remove 6 captive bolts from
upper hinge and remove the
upper and lower end cover

18# Wrench

P18S00014
8. Remove eight captive bolts
from lower hinge, and
remove upper cover and
lower end cover

18# Wrench

P18S00015
 7-13
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

Figures Operation instruction Tools

9. Knock out the bearings of
upper and lower hinge with
bearing knocking tooling and
sledge hammer.

Bearing knock-
ing tooling and
sledge hammer

P18S00016

Installation of hinge assembly

Figures Operation instruction Tools

1. Lift rear frame with lifting
equipment and put it on spe-
cial firm tooling to make sure
it is in level, safe and steady
state (the front end of rear
frame is about 660mm/
25.98in from the ground,
and the rear end is about
980mm/38.58in from the Hoisting equip-
ground) ment (over 5ton)
CAUTION: The
Ground personnel operating
P18S00017 lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
2. Put two pairs of bearing
cone cups into liquid nitro-
Liquid nitrogen,
gen for freezing until there is
hook fixture
not a lot of smoke coming
out.
7-14
Removal and Installation January 24, 2017
Removal and installation of hinge assembly CLG835H

Figures Operation instruction Tools

3. Install dust rings into upper
and lower covers respec-
tively, and apply grease to
the lip of dust ring and the
inner walls of upper and
lower hinge hole.
Copper bar

P18S00018

4. Fix the lower hinge lower

cover on the rear frame with
bolts.

18# Wrench

P18S00019
 7-15
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

Figures Operation instruction Tools

5. Install one frozen tapered
roller bearing cone cup into Copper bar and
lower hinge hole bearing knock-
ing tooling

6. Install two tapered roller

bearing cones into lower
hinge holes, and pay atten-
Copper bar
tion that two tapered roller
bearing cones are in oppo-
P18S00020 site directions.
7. Install another frozen taper
roller bearing cone cup into
lower hinge hole.

Copper bar and

bearing knock-
ing tooling

P18S00021

8. Select the shim with

appropriate thickness, install
the shim and upper and
lower covers, tighten
mounting bolts, and
tightening torque is: 18# Wrench
120±10N.m/ 88.5±7.375
lbf·ft. Torque wrench

P18S00022
7-16
Removal and Installation January 24, 2017
Removal and installation of hinge assembly CLG835H

Figures Operation instruction Tools

9. Install the tooling for Bearing torque
measuring bearing torque tooling
10. Measure the torque needed
to rotate upper hinge
bearing, and normal torque
is: 2.3~13.6N.m/ 1.7~10.03
Torque wrench,
lbf·ft. If the torque is not
18# wrench
within the scope, it can
decrease or increase the
shims to reach normal
rotating torque.
P18S00023 11. Install the lower hinge
referring to Steps 4~10.
12. Install the lower hinge
spacer sleeve

Copper bar

P18S00024

13. Measure the torque needed

to rotate lower hinge bear-
ing, and normal torque is:
7.9~22.6N.m/ 5.83~16.67
lbf·ft. If the torque is not Torque wrench
within the scope, it can
decrease or increase the
shims to reach normal rotat-
ing torque.
 7-17
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

Figures Operation instruction Tools

14. Install the lower bushing

Copper bar

P18S00025

15. Lift front frame to mounting

position with lifting equip-
ment, and align the hinge
hole of front frame with that
of rear frame
WARNNING: Fingers
cannot be put into the
hole when aligning with the
hole, otherwise it may cause Hoisting equip-
personal injury! ment (over 5ton)
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7-18
Removal and Installation January 24, 2017
Removal and installation of hinge assembly CLG835H

Figures Operation instruction Tools

16. Install lower hinge pin

Copper bar

P18S00026
17. Install upper hinge pin

Copper bar

P18S00027
 7-19
January 24, 2017 Removal and Installation
CLG835H Removal and installation of hinge assembly

Figures Operation instruction Tools

18. Select the shim with appro-
priate thickness, install the
shim and lock plate, tighten
mounting bolts and the
torque of bolts fixing the
hinge pin is 68±14Nm/ 18#, 24#
50.15±10.325lbf·ft. spanner, torque
spanner

P18S00028
19. Install the upper hinge
cover, tighten mounting bolt,
and tightening torque is:
90±12N.m/ 66.375±8.85
lbf·ft
18#
Wrench,torque
wrench

P18S00029
20. Install the joint of lubrication
pipe

P18S00030
7-20
Removal and Installation January 24, 2017
Removal and installation of counterweight assembly CLG835H

Removal and installation of counterweight assembly

Removal of the left and right battery box (take left battery box as an example)

Removal description: Before removing left and right battery box, please remove cooling system, fuel
tank assembly and DEF lines assembly.

Figures Operation instruction Tools

1. Remove rear floodlight and
battery, and please refer to
removal steps for rear flood-
light and battery of electrical
system.
2. First take out plug (4), and
Straight
then install 2 M24 lifting
screwdriver
screws
4 4
3. Hook the loop screw by a lift-
ing appliance and tighten
the hanger slightly
CAUTION: The
personnel operating Hoisting
lifting equipment shall have equipment (over
relevant qualifications, and 3ton)
only can operate on the
P18S00031 premise that equipment and
lifting sling are normal and
safety is guaranteed!
4. Remove 3 mounting bolts,
lift the counterweight out
with lifting equipment and
put on firm ground.
CAUTION: The 36# socket
personnel operating wrench, lifting
lifting equipment shall have equipments
relevant qualifications, and (over 3 tons)
only can operate on the
premise that equipment and
P18S00032 lifting sling are normal and
safety is guaranteed!
 7-21
January 24, 2017 Removal and Installation
CLG835H Removal and installation of counterweight assembly

Installation of left and right battery box (take left battery box as an example)

Figures Operation instruction Tools

1. First take out plug (4), and
4
4 then install 2 M24 lifting
screws

Straight screw-
driver

P18S00033

2. Lift lifting screws with lifting

equipment, lift the counter-
weight to mounting position,
and align with bolt mounting
hole.
WARNNING: Fingers
cannot be put into the
hole when aligning with the
hole, otherwise it may cause Hoisting equip-
personal injury! ment (over 3ton)
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3. Install 3 mounting bolts and
shims. Tightening torque:
410±50N.m/
302.375±36.875lbf·ft
36# Socket
wrench,torque
wrench

P18S00034
7-22
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Removal and installation of work implement system

Removal and installation of linkage

Removal of linkage

Figures Operation instruction Tools

1. Remove linkage front pin
By referring to the steps for
removing linkage front pin in
removal of bucket, remove link-
age front pin.
2. Remove linkage rear pin
1) Remove captive bolt of rear
pin of linkage

18# Wrench

P18S00035

2) Hook the linkage by a lifting

appliance and tighten the
hanger slightly.
CAUTION: The
personnel operating Hoisting
lifting equipment shall have equipment (over
relevant qualifications, and 1ton)
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
 7-23
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

3) Knock out the rear pin of
linkage with pin knocking
tooling and sledge hammer

Pin knocking
tooling and
sledge hammer

P18S00036
4) Lift the linkage to the firm
ground with the lifting equip-
ment
CAUTION: The
personnel operating Hoisting
lifting equipment shall have equipment (over
relevant qualifications, and 1ton)
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7-24
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Installation of linkage

Figures Operation instruction Tools

1. Install linkage rear pin
1) Install two O-rings at the
rear end of linkage(connect
with the end of rocker arm)
P18S00037

2) Lift the linkage to mounting

position with lifting equip-
ment, and align the front
end hole of rocker arm with
the rear end hole of linkage.
WARNNING: Fingers
cannot be put into the
hole when aligning with the
Hoisting
hole, otherwise it may cause
equipment (over
personal injury!
1ton)
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3) Install lever rear pin, and
simultaneously select the
shim with appropriate thick-
ness according to clearance
of rocker arm and linkage to
make sure the clearance at
one side is less than 1mm/
0.04in. Sledge hammer

P18S00038
 7-25
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

4) Install captive bolt

18# Wrench

P18S00039
2. Install linkage front pin
By referring to the steps for
installing linkage front pin in
installation of bucket, install
linkage front pin.

Removal and installation of bucket lever

Removal of rocker arm

Figures Operation instruction Tools

1. Remove the linkage
By referring to the steps for
removing the linkage in removal
and installation of linkage,
remove the linkage.
2. Remove bucket tilting
cylinder
By referring to the steps for
removing bucket tilting cylinder
in hydraulic system, remove the
bucket tilting cylinder from the
machine
3. Remove the middle pin of
rocker arm
1) Remove middle pin captive
bolt of rocker arm

18# Wrench

P18S00040
7-26
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

2) Hook the rocker arm by a
lifting appliance and tighten
the hanger slightly
CAUTION: The
personnel operating Hoisting
lifting equipment shall have equipment (over
relevant qualifications, and 1ton)
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3) Knock out the middle pin of
rocker arm with pin
knocking tooling and sledge
hammer

Pin knocking
tooling and
sledge hammer

P18S00041
4) Lift the rocker arm to the
firm ground with the lifting
equipment
CAUTION: The
personnel operating Hoisting
lifting equipment shall have equipment (over
relevant qualifications, and 1ton)
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
 7-27
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Installation of rocker arm

Figures Operation instruction Tools

1. Lift rocker arm to mounting
position with lifting equipment,
and align the middle pin hole of
rocker arm with arm mounting
hole on the boom.
WARNNING: Fingers cannot
be put into the hole when
aligning with the hole, otherwise Hoisting equip-
it may cause personal injury! ment (over 1ton)
CAUTION: The personnel
operating lifting equipment
shall have relevant
qualifications, and only can
operate on the premise that
equipment and lifting sling are
normal and safety is guaranteed!
2. Install rocker arm middle pin,
and simultaneously select the
shim with appropriate thick-
ness according to clearance of
rocker arm and boom to make
sure clearance at one side is
less than 1mm/0.04in.
Sledge hammer

P18S00042
3. Install captive bolt

18# Wrench

P18S00043
7-28
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Removal and installation of the boom

Removal of boom

Figures Operation instruction Tools

1. Remove the bucket
By referring to steps for removal
of bucket , remove the bucket.
2. Remove the linkage
By referring to the steps for
removing the linkage in removal
and installation of linkage,
remove the linkage.
3. Remove the rocker arm
By referring to the steps for
removing the rocker arm in
removal and installation of rocker
arm, remove the rocker arm.
4. Remove bucket tilting cylinder
By referring to the steps for
removing bucket tilting cylinder in
hydraulic system, remove bucket
tilting cylinder.
5. Remove boom cylinder
By referring to the steps for
removing boom cylinder in
hydraulic system, remove boom
cylinder.
6. Remove lubrication pipe

16# Wrench

P18S00044
 7-29
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

7. Remove the boom pin
1) Lift boom beam with lifting
equipment, and tension lifting
sling for holding the boom.
CAUTION: The personnel
operating lifting Hoisting equip-
equipment shall have relevant ment (over
qualifications, and only can 3ton)
operate on the premise that
equipment and lifting sling are
normal and safety is
guaranteed!

P18S00045
2) Remove the captive bolts of
boom pin at left and right
sides

18# Wrench

P18S00046
7-30
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

3) Knock out boom pins on right
and left sides with pin knock-
ing tooling and sledge ham-
mer.

Pin knocking
tooling and
sledge hammer

P18S00047
4) Lift out the boom with lifting
equipment gently and place it
on firm ground.
CAUTION: The personnel
operating lifting Hoisting equip-
equipment shall have relevant ment (over
qualifications, and only can 3ton)
operate on the premise that
equipment and lifting sling are
normal and safety is
guaranteed!
 7-31
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Installation of boom

Figures Operation instruction Tools

1) Lift the boom to mounting position
with lifting equipment, and align
boom hole with the boom mount-
ing hole on front frame.
WARNNING: Fingers cannot be
put into the hole when aligning
Hoisting
with the hole, otherwise it may
equipment (over
cause personal injury!
3ton)
CAUTION: The personnel
operating lifting equipment
shall have relevant qualifications,
and only can operate on the premise
that equipment and lifting sling are
P18S00048
normal and safety is guaranteed!
2) Install boom pin, and
simultaneously select the shim
with appropriate thickness
according to clearance of boom
and front frame to make sure
clearance at one side is less than
1mm/0.04in.
Sledge hammer

P18S00049

3) Install captive bolt

18# Wrench

P18S00050
7-32
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Replacement of work implement bushing

Replacement of linkage bushing
Figures Operation instruction Tools
Replace the linkage bushing
5 Straight
1. Remove seal rings (4, 5) with a screwdriver
straight screwdriver
1 3 2. Knock out the linkage bushing (2, Shaft bushing
5 3) with bushing knocking tooling knocking tooling,
and sledge hammer sledge hammer
3. Put new linkage bushing (2, 3)
4 into liquid nitrogen for freezing Liquid nitrogen,
until there is not a lot of smoke hook fixture
coming out
2
4 4. Install frozen linkage shaft bush-
ing (2, 3) into linkage (1) with
Shaft bushing
1. Linkage shaft bushing knocking tooling
knocking tooling,
2. Bushing and sledge hammer , and
sledge hammer
3. Bushing reserve mounting position for
4. Seal ring seal rings on both sides.
5.Seal ring 5. Knock new seal ring (4, 5) into
P18S00051 Copper bar
linkage (1) gently with copper bar

Replacement of rocker arm bushing

Figures Operation instruction Tools
Replace the rocker arm shaft bushing
Straight
1. Remove the seal ring (3) with a screwdriver
straight screwdriver
2. Knock out rocker arm bushing (2) Shaft bushing
with bushing knocking tooling and knocking tooling,
11 sledge hammer. sledge hammer
3. Put new rocker arm bushing (2)
3
3 into liquid nitrogen for freezing Liquid nitrogen,
22
until there is not a lot of smoke hook fixture
33 coming out.
4. Install frozen rocker arm bushing
(2) into rocker arm (1) with
Shaft bushing
bushing knocking tooling and
knocking tooling,
sledge hammer, and reserve
sledge hammer
mounting position for seal rings
1. Rocker arm on both sides.
2. Rocker arm bushing 5. Knock seal ring (3) into rocker
3. Seal ring arm (1) gently with copper bar. Copper bar
P18S00052
 7-33
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Replacement of boom shaft bushing

Figures Operation instruction Tools

Replace the boom bushing
Straight
1. Remove seal rings (3, 6) screwdriver
with a straight screwdriver
2. Knock frame bushing (2),
boom bushing (4) and Shaft bushing
bushing (5) out in sequence knocking tooling,
with bushing knocking sledge hammer
tooling and sledge hammer.
3. Put new frame bushing (2),
boom bushing (4) and
bushing (5) into liquid Liquid nitrogen,
nitrogen for freezing until hook fixture
there is not a lot of smoke
coming out.
4. Install frozen frame shaft
bushing (2), boom shaft
bushing (4) and shaft
bushing (5) into the boom Shaft bushing
1. Boom (1) in sequence with shaft knocking tooling,
2. Frame bushing bushing knocking tooling sledge hammer
3. Boom bushing and sledge hammer, and
4. Bushing
reserve mounting position
5. Seal ring P18S00053
for seal rings on both sides.
5. Knock seal rings (3, 6) into
the boom (1) gently with Copper bar
copper bar
7-34
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Removal and installation of accessory system

Removal and installation of bucket

Bucket removal

Figures Operation instruction Tools

1. Remove linkage front pin
1) Start the machine, put the
boom in the lowest position;
lay flat the bucket and then
switch off.
2) Disassemble the captive
bolt of linkage front pin.

18# Wrench

P18S00054
 7-35
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

3) Lift linkage front end with
lifting equipment, tension
lifting tool gently, and
remove linkage front pin
with sledge hammer and
pin knocking tooling.
CAUTION: The Sledge hammer,
personnel operating pin knocking
lifting equipment shall have tooling, and a
relevant qualifications, and lifting appliance
only can operate on the more than 3 tons
premise that equipment and
lifting sling are normal and
safety is guaranteed!

P18S00055
4) Gently put linkage front end
to ground with lifting equip-
ment, and pad rubber or
paperboard on the contact
place with ground to pre-
vent bumping against the
ground. Hoisting
CAUTION: The equipment (over
personnel operating 3ton)
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
2. Remove the lower pin of the
bucket
1) Hook the bucket by a lifting
appliance and tighten the
hanger slightly.
Hoisting
CAUTION: The
equipment (over
personnel operating
3ton)
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7-36
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

2) Remove the captive bolts of
the bucket lower pin on the
left and right sides.

18# Wrench

P18S00056
3) Remove the bucket lower
pins on left and right sides
with sledge hammer and
pin knocking tooling.

Sledge hammer
and pin knocking
tooling

P18S00057
4) Lift the bucket out gently
with lifting equipment, and
put it on firm ground, and
wait for repair or replace-
ment.
CAUTION: The Hoisting
personnel operating equipment (over
lifting equipment shall have 3ton)
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
 7-37
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Installation of bucket

Description: In order to guarantee the traceability of the machine and bucket, the bucket cannot be
replaced when installed!

Figures Operation instruction Tools

1. Install the lower pin of the
bucket
1) Install front O-ring of boom.

P18S00058
2) Lift the bucket to mounting
position with lifting equip-
ment, and align the lower
pin hole of bucket with the
front end hole of boom.
WARNNING: Fingers
cannot be put into the
hole when aligning with the
Hoisting
hole, otherwise it may cause
equipment (over
personal injury!
3ton)
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
7-38
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

3) Install the bucket lower pins
on left and right sides, and
simultaneously select the
shim with appropriate
thickness according to the
clearance of bucket and
boom to make sure the Sledge hammer
clearance at one side is
less than 1mm/0.04in.

P18S00059
4) Install captive bolts at left
and right sides.

18# Wrench

P18S00060
2. Install linkage front pin
1) Install front O-ring of link-
age.

P18S00061
 7-39
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

2) Lift linkage front end to
mounting position with lift-
ing equipment, start the
machine, operate control
lever to adjust linkage posi-
tion, and align the upper
hole of bucket with linkage
front pin hole.
WARNNING: Fingers
cannot be put into the Hoisting
hole when aligning with the equipment (over
hole, otherwise it may cause 3ton)
personal injury!
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3) Install the front pin of link-
age, and simultaneously
select the shim with appro-
priate thickness according
to clearance of bucket and
linkage to make sure the
clearance at one side is
less than 1mm/0.04in.
Sledge hammer

P18S00062
7-40
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

4) Install the captive bolt of
linkage front pin.

18# Wrench

P18S00063
 7-41
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Removal and installation of quick coupler bucket and quick coupler frame

Removal of quick coupler bucket and quick coupler frame

Figures Operation instruction Tools

1. Remove the quick coupler
bucket
1) Start the machine, put the
boom in the lowest position,
lay flat the bucket
2) Operate the third linkage of
pilot lever, and then retract
the quick coupler bucket pin
to the quick coupler frame.
3) Separate the quick coupler
P18S00064 frame from the bucket.

P18S00065
2. Remove the quick coupler
multi-functional pipe joint
1) Operate the complete
machine, lower the boom to
the lowest position and lean
forward the quick coupler
frame for a proper angle,
then shut it off. 30# Wrench
2) Remove the quick coupler
multi-functional pipe joint at
left and right sides, and
then collect the hydraulic oil
drained from the pipe with a
P18S00066
drip pan to prevent contami-
nating the ground.
7-42
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

3. Remove linkage front pin
1) Pad the upper pipe of quick
coupler frame with a tooling
with proper height to pre-
vent the quick coupler
frame rotating forward, then
remove the captive bolt of
linkage front pin. 18# Wrench

P18S00067
2) Lift linkage front end with
lifting equipment, tension
lifting tool gently, and
remove linkage front pin
with sledge hammer and
pin knocking tooling. Sledge hammer,
CAUTION: The pin knocking
personnel operating tooling, and a lift-
lifting equipment shall have ing appliance
relevant qualifications, and more than 3 tons
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
P18S00068
3) Gently put linkage front end
to ground with lifting equip-
ment, and pad rubber or
paperboard on the contact
place with ground to pre-
vent bumping against the
ground.
Hoisting equip-
CAUTION: The ment (over 3ton)
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
 7-43
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

4. Remove the lower pin of the
bucket
1) Hook the quick coupler
frame by a lifting appliance
and tighten the hanger
slightly.
Hoisting
CAUTION: The equipment (over
personnel operating 3ton)
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
2) Remove the captive bolts of
the bucket lower pin on the
left and right sides.

18# Wrench

P18S00069
3) Remove the bucket lower
pins on left and right sides
with sledge hammer and
pin knocking tooling.

Sledge hammer
and pin knocking
tooling

P18S00070
7-44
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

4) Lift the quick coupler frame
out gently with lifting equip-
ment, and put it on firm
ground, and wait for repair
or replacement.
CAUTION: The Hoisting
personnel operating equipment (over
lifting equipment shall have 3ton)
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!

Installation of quick coupler bucket and quick coupler frame

Description: In order to guarantee the traceability of the machine and bucket, the quick coupler bucket
and quick coupler frame cannot be replaced when installed!

Figures Operation instruction Tools

1. Install the lower pin of the
bucket
1) Install front O-ring of boom.

P18S00071
 7-45
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

2) Lift the quick coupler frame
to mounting position with
lifting equipment, and align
the lower pin hole with the
front end hole of boom.
WARNNING: Fingers
cannot be put into the
hole when aligning with the
hole, otherwise it may cause Hoisting equip-
personal injury! ment (over 3ton)
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3) Install the bucket lower pins
on left and right sides, and
simultaneously select the
shim with appropriate thick-
ness according to the clear-
ance of quick coupler frame
and boom to make sure the
Sledge hammer
clearance at one side is
less than 1mm/0.04in.

P18S00072
4) Install captive bolts at left
and right sides.
5) Pad the upper pipe of quick
coupler frame with a tooling
with proper height to pre-
vent the quick coupler
frame rotating forward, then 18# Wrench
loosen the quick coupler
frame sling.

P18S00073
7-46
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

2. Connect the quick coupler
multi-functional pipe joint at
left and right sides

30# Wrench

P18S00074
3. Install linkage front pin
1) Install front O-ring of link-
age.

P18S00075
 7-47
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Figures Operation instruction Tools

2) Lift linkage front end to
mounting position with lift-
ing equipment, start the
machine, operate control
lever to adjust linkage posi-
tion, and align the upper
hole of quick coupler frame
with linkage front pin hole.
WARNNING: Fingers
cannot be put into the Hoisting
hole when aligning with the equipment (over
hole, otherwise it may cause 3ton)
personal injury!
CAUTION: The
personnel operating
lifting equipment shall have
relevant qualifications, and
only can operate on the
premise that equipment and
lifting sling are normal and
safety is guaranteed!
3) Install the linkage front pin,
and simultaneously select
the shim with appropriate
thickness according to
clearance of quick coupler
frame and linkage to make
sure the clearance at one
side is less than 1mm/
0.04in. Sledge hammer

P18S00076
7-48
Removal and Installation January 24, 2017
Removal and installation of work implement system CLG835H

Figures Operation instruction Tools

4) Install the captive bolt of
linkage front pin.

18# Wrench

P18S00077

4, Install the quick coupler

bucket
1) Operate the machine, and
align the upper mounting
pin of quick coupler frame
with upper mounting hole of
quick coupler bucket

P18S00078
2) Operate the machine, align
the lower pin hole of quick
coupler frame with the
lower mounting hole of
quick coupler bucket, and
operate the third linkage of
pilot lever, then extend the
pin of quick coupler bucket,
lock the quick coupler
bucket.
P18S00079
 7-49
January 24, 2017 Removal and Installation
CLG835H Removal and installation of work implement system

Replacement of bucket movable blade, movable tooth and tip

Figures Operation instruction Tools

1. Replace the tip:
1) Use hammer and pin
knocking tooling to remove
the pin (9) connecting tip
and tooth.
2) Take out the tip (8) and the Hammer and pin
retainer (10). knocking tooling
3) Install new retainer (10) and
tip (8).
(4) Align the tip with tip mount-
ing hole, and install new pin
(9).
2. Replace the middle tooth of
bucket:
1. Lock bolt 8. Gear sleeve
2. Nut 9. Pin 1) Remove the nut (2) and
3. Nut 10.Retainer lock bolt (1) fixing tooth.
4. Washer 11.Movable Blade 50# Socket
2) Take out the tooth (13).
5. Bolt 12.Cutting edge wrench
6. Lock bolt 13.Gear body 3) Install new tooth (13) on
7. Side gear body P18S00080 cutting edge (12).
4) Install new lock bolt (1) and
nut (2).
3. Replace the side tooth of
bucket:
1) Remove the nut (2) and
lock bolt (6) fixing side
tooth.
50# Socket
2) Take out the side tooth (7). wrench
3) Install new side tooth (7) on
cutting edge (12).
4) Install new lock bolt (6) and
nut (2).
7-50
Removal and Installation January 24, 2017
Option work implement and accessory system CLG835H

Figures Operation instruction Tools

4. Replace the movable blade:
1) Remove nut (3), washer (4)
and bolt (5) fixing movable
blade.
2) Take down movable blade
(No.11).
50# Socket
3) Place new movable blade wrench
(11) on corresponding posi-
tion of cutting edge.
4) Align the mounting holes of
movable blade and cutting
edge, and install new bolt
(5), washer (4) and nut (3).

Option work implement and accessory system

Option of work implement system

Work implement system has standard boom and extension boom for selection, please refer to "Work
Implement Parameters", and select according to practical use and needs of working conditions.

Option of accessory system

Procedure of selecting and assembling the bucket:

1. Identify the target condition.

2. According to working condition, select suitable bucket type according to Attached Table 1 - Bucket
Classification Table.
3. Look up the Attached Table 3 Bulk Density of Bulk Materials to obtain the corresponding density of
material of working condition.
4. According to material density value, select corresponding bucket capacity by checking Attached
Table 2 - Recommendation List for Bucket Selection.

Attached table 1: The classification table of bucket

Acceptable range of
Types of Buckets Main purposes
density
Applicable to various working conditions, provided with excel-
GP bucket 1.2~1.9t/m3 lent insertion performance and material holding performance.
Light loading hopper 0.8~1.25t/m3 It is mainly used in condition of loose light load material
Rock bucket 1.8~2.0t/m3 It is under heavy load condition, such as rocks, etc.
 7-51
January 24, 2017 Removal and Installation
CLG835H Option work implement and accessory system

Attached table 2:

BUCKET SELECTION CHARTS

Bucket full rate
Bucket capacity(m3)

Density of the materials(Kg/dm3)

P18S00081

Attached Table 3 Bulk density and repose angle of loose materials

Bulk Repose angle Bulk Repose angle

Material density Material density
/t•m-3 Motion Rest /t•m-3 Motion Rest

Anthracite (Dry
0.7~1.0 27°~30° 27°~45° Zinc flue dust 0.7~1.5
and small)
Bitumite 0.8 30° 35°~45° Pyrite cinder 1.7~1.8
Plumbum-zinc con-
Lignite 0.6 ~0.8 35° 35°~50° 1.3~1.8
centrate
Peat 0.29~0.5 40° 45° Pyrite pellet 1.2~1.4
Slag of the open
Peat (damp) 0.55~0.65 10° 45° hearth furnace 1.6~1.85 15°~50°
(coarse)
Coke 0.36~0.53 35° 50° Blast furnace slag 0.6~1.0 35° 50°
Lead and zinc
Charcoal 0.2~0.4 granulated slag 1.5~1.6 42°
(wet)
Anthracite culm 0.84~0.89 37°~45° Dry coal ash 0.64~0.72 35°~45°
bitumite powder 0.4~0.7 37°~45° Coal ash 0.70 15°~20°
Graphite powder 0.45 40° ~45° Grit (dry) 1.4~1.9 50°
7-52
Removal and Installation January 24, 2017
Option work implement and accessory system CLG835H

Bulk Repose angle Bulk Repose angle

Material density Material density
/t•m-3 Motion Rest /t•m-3 Motion Rest

Magnet ore 2.5~3.5 30° ~35° 40° ~45° Fine sand (dry) 1.4~1.65 30°
Hematite 2.0~2.8 30°~35° 40° ~45° Fine sand (wet) 1.3~2.1 30°~35°
Limonite 1.2~2.1 30°~35° 40° ~45° Moulding sand 0.8~1.3 30° 45°
Limestone (large
Manganese ore 1.7~1.9 35°~45° 1.6~2.0 30°~35° 40°~45°
block)
Magnesia Limestone
2.2~2.5 40°~42° 1.2~1.5 30°~35° 40°~45°
(agglomerate) (medium block)
Magnesia
2.1~2.2 45°~50° Quicklime 1.7~1.8 25° 45°~50°
powder
Copper ore 1.7~2.1 35°~45° Gravel 1.32~2.0 35° 45°
Copper
1.3~1.8 40° Dolomite (block) 1.2~2.0 35°
concentrate
Plumbum
1.9~2.4 40° Dolomite fragment 1.8~1.9 35°
concentrate
Zinc concentrate 1.3~1.7 40° Gravel 1.5~1.9 30° 30°~45°
Plumbum-zinc
1.3~2.4 40° Clay (small block) 0.7~1.5 40° 50°
concentrate
Sintered iron 1.7~2.0 45°-50° Clay (wet) 1.7 27°~45°
Sinter fragment 1.4~1.6 35° Concrete 0.9~1.7 35° 40°~45°
Sintered Slaked lime (pow-
1.8~2.2 0.5
plumbum der)
Sintered
plumbum and 1.6~2.0 Slaked lime (block) 2.0
zinc
 8-1
January 24, 2017 Electrical System
CLG835H

Electrical System
Basic Information ............................................................................................................8-5
Instructions of service manual ...............................................................................................................8-5
Notes for welding ...................................................................................................................................8-5
The introduction of signs on the electrical schematic.............................................................................8-7

Structure Function Principle ..........................................................................................8-9

Power System ........................................................................................................................................8-9
Power System ....................................................................................................................................8-9
Electric lock .....................................................................................................................................8-11
Fuse .................................................................................................................................................8-12
Disconnect switch ............................................................................................................................8-15
Battery..............................................................................................................................................8-16
Power supply relay...........................................................................................................................8-18
Starting module ....................................................................................................................................8-21
Start Contactor .................................................................................................................................8-24
Relay ................................................................................................................................................8-24
Starting Motor...................................................................................................................................8-25
Alternator..........................................................................................................................................8-26
Monitoring system ................................................................................................................................8-28
Circuit for engine water temperature indication................................................................................8-28
Circuit for torque converter oil temperature indication .....................................................................8-28
Circuit for oil pressure alarm ............................................................................................................8-30
Circuit for transmission oil pressure alarm .......................................................................................8-30
Circuit for fuel level indication ..........................................................................................................8-31
Circuit for DEF level indication .........................................................................................................8-33
Circuit for vehicle speed indication...................................................................................................8-33
Service brake indication circuit.........................................................................................................8-33
Wiring schematic diagram of braking ...............................................................................................8-34
Circuit for parking brake power cut-off .............................................................................................8-36
Circuit for service brake clutch on/off ...............................................................................................8-39
Circuit for air filter blockage alarm....................................................................................................8-40
Circuit for alternator charging indication...........................................................................................8-40
Circuit for voltage indication .............................................................................................................8-42
Circuit of preheat indicator ...............................................................................................................8-43
8-2
Electrical System January 24, 2017
CLG835H

Circuit for seatbelt indicator..............................................................................................................8-44

Circuit for lube system failure indicator ............................................................................................8-44
Circuit for lube system activated indicator........................................................................................8-45
Circuit for steering system failure indicator ......................................................................................8-45
Circuit for secondary steering indicator............................................................................................8-46
Circuit of ride control indicator..........................................................................................................8-48
Circuit for radiator fan reverse indicator ...........................................................................................8-51
Circuit for engine indicator ...............................................................................................................8-52
Circuit for engine diesel particle filter indicator.................................................................................8-52
Circuit for latency shut-down indicator .............................................................................................8-52
Instrument ........................................................................................................................................8-53
Sound and Light Alarm System/Audible and Visual Alarm System/Acousto-optic alarm system ........8-57
Circuit for electric horn .....................................................................................................................8-57
Circuit for backup alarm ...................................................................................................................8-59
Wiper and washer system....................................................................................................................8-60
Circuit diagram for wiper and cleaning system ................................................................................8-60
Wiper motor......................................................................................................................................8-61
Washer reservoir..............................................................................................................................8-62
Positioner and kickout system .............................................................................................................8-63
Principle for auto reset system.........................................................................................................8-63
Lighting system ....................................................................................................................................8-65
Circuit for front frame illumination ....................................................................................................8-65
Circuit for cab lighting.......................................................................................................................8-68
Circuit for rear frame illumination .....................................................................................................8-71
Shift control system..............................................................................................................................8-73
Principle for shift control...................................................................................................................8-74
Electronic control unit.......................................................................................................................8-77
Shift selector ....................................................................................................................................8-77
Audio system .......................................................................................................................................8-79
Audio system principle .....................................................................................................................8-79
Radio................................................................................................................................................8-80
Speaker............................................................................................................................................8-80
Antenna............................................................................................................................................8-80
Engine electric control module .............................................................................................................8-81
DEF heater pipe ...............................................................................................................................8-81
Principle for exhaust disposal .........................................................................................................8-82
 8-3
January 24, 2017 Electrical System
CLG835H

Electronic throttle line.......................................................................................................................8-82

DEF pump supply module line .........................................................................................................8-83
Radiator fan control module .................................................................................................................8-83
Control strategy................................................................................................................................8-83
Electrical schematic diagram ...........................................................................................................8-83
Electric proportional controller module of the third linkage ..................................................................8-84
Seat heater ..........................................................................................................................................8-86
Backup monitoring system ...................................................................................................................8-87
Display screen..................................................................................................................................8-88
Power cable ...................................................................................................................................8-88
Appendix ..............................................................................................................................................8-89
Distribution diagram of front frame harness connector ....................................................................8-89
Distribution diagram of work light harness connector ......................................................................8-91
The distribution diagram of cab harness connector .........................................................................8-93
Distribution diagram of rear frame harness connector ....................................................................8-95
8-4
Electrical System January 24, 2017
CLG835H
 8-5
January 24, 2017 Basic Information
CLG835H Instructions of service manual

Basic Information The module failure diagnosis and test introduced

in the Manual does not cover all the faults, thus
please rack your brain and focus on the accumu-
Instructions of service manual lation of experience during the troubleshooting.
In order to describe the electrical principles intui-
The Manual is written by introducing the different tively, colored filling lines are applied to present
modules divided by the main functions of electri- the current flow when introducing the electrical
cal system, whereby, the maintenance opera- system principles in the Manual.
tions of maintenance technicians are facilitated Full consideration to the relationship between the
as they are enabled to promptly find the chapters general and the individual (system and compo-
and sections corresponding to the failure at any nent) when determining the failures will contrib-
time. Besides, the professional descriptions are ute to the rapid, accurate and facilitated
compiled to be accessible in the Manual, none- troubleshooting.
theless, the maintenance personnel shall be pro-
vided with necessary professional knowledge to On condition that digital multimeter (hereinafter
understand the Maintenance Manual. referred to as DMM) is applied to detect faults,
the inherent measuring errors might result in a
When dividing the modules, the Manual starts value slightly differing from that described in the
from introducing the functions of the module, Manual. For instance, when selecting the 200Ω
then presents the main components of the func- of Ω gear of DMM, the values described in the
tions, including the principles, functions an elec- Manual are comparable through shorting out the
trical diagrams of main components. Whereafter, red and black probes, measuring the lead resis-
operation of module function and the diagnosis tance and subtracting such lead resistance from
and test of module failure are introduced. the measured resistance of other circuits.
The component symbols on the schematic dia-
gram indicate the representing methods of com-
Notes for welding
ponents on the diagram. The majority of
component symbols signify the actual schematic
diagram of the components, whereas, the excep- Be sure to comply with the correct welding pro-
tions are specified when introducing the compo- cedures, so as to safeguard the electrical com-
nents. It will help to judge the failure symptom of ponents and bearings against potential
components. damages. When welding on a loader or diesel
engine equipped with electrical components,
The component failure detection methods are
please follow the operating steps below:
also included in the component descriptions
herein. In particular, such methods are only for 1. Place machine on level ground.
the components, whereby, the failures are
2. Put the electrical lock at "OFF" position, and
detected through dismounting the components
shut down the diesel engine.
from the complete machine. As it is unfeasible to
detect the failures in accordance with the above- 3. Pull up the handbrake.
mentioned methods if the components are 4. Turn off the battery disconnect switch, and
mounted on the complete machine. Then deter- shut off the connection between battery and
mine in line with the failure detection methods frame.
described behind the system, or disassemble the
components if necessary, to judge the condition
of components based on the component trouble-
shooting method.
8-6
Basic Information January 24, 2017
Notes for welding CLG835H

5. Clamp the parts to be welded with the 7. Perform the weldment according to the nor-
grounding cable of the welder tightly. The mal welding safe performing procedure.
closer the grounding position with the weld-
ing, the better. Check from earthing cable to
circuit of welding assembly, to verify any of
the below components has not been passed
During welding, the earthing point of welder
through:
on the frame shall be close to the welding
● Bearing point to the greatest extent, for which a reli-
able large-area earthing shall be guaranteed.
● Hydraulic cylinder
Do not use the earth point of any electric
● Internal circuits of the controller or other elec- component on the machine as the earth point
trical units. of the welding machine!
● Doing in this way is to keep the following For welding near the earth point of the elec-
parts away from the possible damage: tric appliance, you must not perform welding
operation until you disconnect the earth
● Bearing
point of the electric appliance and make sure
● Hydraulic parts that the welding circuit of the welding
machine does not pass through the electric
● Electronic component appliance. Otherwise, it will damage the com-
● Other available components of the machine ponents of the electric appliance, and even
lead to a fire!
6. Keep the inflammables away from the weld-
ing site while protect the cables, to safeguard To prevent possible losses, for the machine
them against the loss and damage resulted equipped with electronic control compo-
from the fire caused by splashing sparks and nents, such as the control unit EST-117 of ZF,
welding slag. control box, instrument, and engine ECM
etc., ensure that the welding circuit is discon-
nected from that of the aforementioned elec-
tronic control components before weldment,
while the connectors closest to such control
components shall be unplugged to cut the
circuit off.
 8-7
January 24, 2017 Basic Information
CLG835H The introduction of signs on the electrical schematic

The introduction of signs on the electrical schematic

Graphic symbol of double position manual

Graphic symbol of the control switch
control switch
Descrip-
S/N Name Graphic symbol S/N Name Graphic symbol Description
tion

Normally Emergency stop

1 Pressure switch 1 Keeping
open switch

Normally Instanta-
2 Pressure switch 2 Button switch
closed neous acting

Temperature
3 3 Knob switch Keeping
switch

Instanta-
4 Liquid level switch 4 Knob switch
neous acting

Induction proxim-
5
ity switch

Magnetic induc-
6 tion proximity
switch

Graphic symbol of the relay Graphic symbol of the electromagnet

Descrip
S/N Name Graphic symbol Description S/N Name Graphic symbol
tion

One group of
Electromagnet
1 GP relay normally-open 1
of the switch
contacts
8-8
Basic Information January 24, 2017
The introduction of signs on the electrical schematic CLG835H

Graphic symbol of the relay Graphic symbol of the electromagnet

Descrip
S/N Name Graphic symbol Description S/N Name Graphic symbol
tion

A group of break-
before-make
With Contact Relay changeover con- Proportional
2 2
normally closed tacts, coil in par- electromagnet
allel to restrain
diode

Double-coil
3
electromagnet

Light and signal graphic symbol Graphic symbol of the sensor

Descrip- Descri
S/N Name Graphic symbol S/N Name Graphic symbol
tion ption

1 Lamp 1 Rheostat sensor

Temp sensor with

2 Rotating beacon 2
alarm switch

Pressure sensor
3 Electric horn 3
with alarm switch

Inductive Speed
4 Buzzer 4
sensor

5 Speaker

6 Flash relay
 8-9
January 24, 2017 Structure Function Principle
CLG835H Power System

Structure Function Principle

Power System

Power System

Introduction of the function

The power system equipped in CLG835H-T4F supplies power to the electrical appliances of the com-
plete vehicle. The diesel engine is powered by battery separately before starting, which is then jointly
powered by battery and alternator during running.
Under normal operating circumstances, the normal power supply is available through switching on the
electric lock or starting the diesel engine.
The electrical components, including dome lights, rotating beacons, hazard flashers, clearance light and
electric horn work properly once the negative switch is closed.
Other than the backup alarm and air conditioning function module, the electrical components are ready
for normal use once the electric lock is turned to Gear IGN.
Schematic diagram of Power System

P18E00001
8-10
Structure Function Principle January 24, 2017
Power System CLG835H

Analysis of the electrical schematic diagram

1. After closing the negative switch, the circuit is shown as below. The bus fuse, which does not pass
through the electric lock, is powered. Red part represents the powered section, while the arrows
indicate the current directions, the same representing methods are applied to the sections below.

P18E00002

2. The power relay contacts turn on once the electric lock is turned to Position IGN, and the bus fuse,
which passes through the electric lock, is powered.

P18E00003
 8-11
January 24, 2017 Structure Function Principle
CLG835H Power System

Electric lock Description of pin definition:

Pins 1, 2, 3, 4, 5, 6;
The pins 3, 5 are normally not used;
Steering Pins 1 and 6 - power supply, pin 4 - ignition (con-
column trol power relay coil), pin 2 - starter;

Specification of the positions of the electric

lock

"OFF"-the position to insert and extract the

electrical lock key. At this gear, cut off the power
P18E00004
the electrical equipment on the vehicle. Except
for some electrical equipment (such as dome
light), which are controlled by the battery
disconnect switch instead of the electric lock.
"IGN"-the first gear of the clockwise rotating key
after inserting the key to electric lock. "IGN"
connects the powers of electrical equipment
throughout the machine, which are powered by
battery.
"START"-the second gear of the clockwise
rotating key after inserting the key to electric
P18E00005
lock. Such gear starts the diesel engine, which is
incapable of self-hold. The key to electric lock
returns automatically to "IGN" once it is
loosened.

Precautions

After starting the oil engine, loosen the key of the

electrical lock immediately to make it return to its
position. Otherwise it will lead to serious
electrical fault.
Switch off the electric lock if it fails to start for the
first time, then proceed on to second starts. First
turn the electrical lock key to "OFF" position.
P18E00006 Second turn it to the "IGN" position; Finally to
"START" position, which completes a startup
PIN CIRCUIT
circle.
2 START
If the diesel engine fails to start within 15S,
3 ACCESSARY
switch off the electric lock. Continual starting
4&5 IGNITION should be less than three times. Each start time
1&6 BATTERY shall be controlled within 15S, or else power loss
PINS 1&6 CONNECTED TOGETHER INTERNALLY may be resulted in for the continuous high-power
PINS 4&5 CONNECTED TOGETHER INTERNALLY output of battery.
8-12
Structure Function Principle January 24, 2017
Power System CLG835H

If the diesel engine fails to start in three Fuse

consecutive trials, switch off the electric lock, and
implement the second starting round after 30 Fuse acts as protecting terminal equipment dur-
minutes. Inspect the battery and start circuit, if ing short circuit or overcurrent. Different series of
necessary, to see whether there are failures in fuses are applied in the power system, such as
the way of starting. plug-in fuse and bolt fuse. The specifications of
A majority of the start difficulties happen plug-in fuse diversified from 20A to 15A, 10A,
outdoors in the cold winter, where the ambient 7.5A and 5A, for the branch circuits. The specifi-
temperature may be even lower than 5°C. If cations of bolt fuse ranges from 30A, 50A, 60A,
possible, try to start the diesel engine indoors 80A, 150A, for the main circuit.
instead, or improve the start with auxiliary Location diagram of complete bolt type fusing
heating. machine
For the disassembly of other components of the
machine induced by the electric lock removal or
installation, please refer to the corresponding
tool lists which are excluded from the section
hereof.

Procedures of failure detection for electric

lock

1. Unplug the connectors connected with the

electric lock, to separate the electric lock
from the machine circuit.
2. Turn the digital multimeter to 200 Ω of Ω posi- P18E00007
tion.
3. According to the electric lock gear logical Location diagram of complete inserting disk fus-
table, pins corresponding to "●" marked in ing machine
each gear should be connected, and the dis-
play value of multimeter should be "0" when
measuring; pins between "●" marked and "●"
unmarked should be disconnected, and the
value of multimeter should be "1" when mea-
suring. Otherwise, it can be judged as electric
lock fault.
Note: "0" indicates the resistance between the
two pins is measured as zero; "1" indicates the
resistance between the two pins is infinite.
Electric lock gear logical table
Gears
1 2 3 4 5 6
Pin
OFF ● ●
IGN ● ● ● ● P18E00008
START ● ● ● ● ●
 8-13
January 24, 2017 Structure Function Principle
CLG835H Power System

The colors of plug-in fuse vary in accordance

with the specifications, the specifications and
colors of plug-in fuses applied in the machine,
together with the corresponding LiuGong part
numbers are listed in the table below for
reference only.

LiuGong com-
Specification Color
ponent number
37B2023 5A Brown
37B2024 7.5A Brown
37B2025 10A Red
37B2026 15A Blue
37B2027 Running time Yellow
8-14
Structure Function Principle January 24, 2017
Power System CLG835H

Definition table for function of plug-in fuse is as follows:

P18E00009

1. Aux control 4 13.Standby 12 25.Standby 1

2. DC-DC 14.Electric lock 26.Standby 3
3. Aux control 2 15.Fuel lift pump 27.Standby 5
4. Headlight 16.Aux control 1 28.Standby 7
5. Standby 6 17.Flasher/small lamp 29.Electric horn / backup alarm
6. Seats 18.Emergency steering system 30.ECM power
7. Front work light 19.Radio and tape player/cigar Lighter 31.Standby 13
8. Standby 2 20.Aux control 3 32.Brake light
9. Standby 4 21.Instrument 33.Right brake light
10.ECM power 22.Rear work light 34.Left brake light
11.Left small lamp 23.Defroster
12.Right small lamp 24.Wiper system
 8-15
January 24, 2017 Structure Function Principle
CLG835H Power System

Precautions Disconnect switch

The specifications of different fuses are available Negative switch regulates the connection
from calculation during the circuit design, accord- between battery (-) and the machine frame. The
ingly, the blown fuse shall be replaced with that power (-) of the whole machine is disconnected
of the same series and specifications. Don’t when the negative switch is turned to "O" (OFF).
replace the fuse with a fuse of different specifica- The complete vehicle electrical equipment can-
tions. not work even turn on the electrical lock. Turn the
On condition that the replacement of blown fuse negative switch to "I" (ON), the power (-) of the
break down again, proceed on replacing after whole machine is connected. Whereby, the elec-
inspecting the circuit under the jurisdiction of the tric lock controls the connections between the
fuse and troubleshooting. electrical components and powers throughout
the machine, as well as starts the diesel engine.
The troubleshooting method of fuse

Remove the plug-in fuse from the fuse holder, to

determine the condition of fuse visually. The
inspection methods of bolt fuses can also be
applied in the judgment.
Adjustment steps for blowout of bolting type fuse:
1. Turn the digital multimeter to 200 Ω of Ω posi-
tion.
2. Connect both terminals of the fuse with the
P18E00010
DMM probes respectively.
3. The indicated value "1" of the DMM signifies
that the fuse is blown and replacement is
needed, while the value "0" displayed on the
DMM indicates the good service condition of
fuse.
8-16
Structure Function Principle January 24, 2017
Power System CLG835H

Precautions

1. Be sure to turn off the negative switch at the

end of each operation or driving, or else
severe consequences (such as electric leak-
age) might be resulted in;
2. Don’t close the negative electrode switch
during engine’s running. Such error has a
severe influence on the electrical systems of
the complete machine.
3. Turn off the electric lock and then the nega- P18E00011
tive switch to halt the machine.
State detection of battery
4. Turn on the negative switch and then the
electric lock to start the machine. Observe the built-in hydrometer of the battery
5. Be sure to turn off the negative switch before cover in well-lighted condition, to figure out the
connecting battery cable, fastening the pile charge state of battery or take appropriate mea-
tip of battery cable or disassembling battery sures in accordance with the color displayed in
cable. the hydrometer, in particular:
6. Be sure to turn off the negative switch before Indicator
Green Black Transparent
implementing welding operation on the whole color
machine. State or
Good
Need be Need be
solution charged replaced
Battery
Battery charging
The machine obtains +24 V power through the
For the batteries whose hydrometer is black,
series connection of 2 batteries. The rate capac-
recharging is required.
ity is 55Ah, and cold-starting current is 850CCA.
For the batteries whose hydrometer has trans-
As reversible DC (direct current), the battery con-
parently light color, there might be bubbles in the
nects in parallel with the alternator to jointly
hydrometer. Whereupon, remove all the battery
power the electrical equipments of the complete
connecting cables and shake the battery gently
machine. Battery supplies great current in a short
after it is fully cooled. The battery shall be
time, to start the motor and further drive the die-
scrapped, provided that the above-mentioned
sel engine to start. Besides, the battery serves
transparently light color remains.
as an electrical appliance, which safeguards
electrical equipment of the machine through 1. Turn the negative switch to state "0". Turn the
absorbing the overvoltage arising from the circuit electrical lock to "OFF", and extract the key.
at any moment.
2. Disassemble the battery from the machine.
Turn off the battery cable (-) and battery
cable (+) successively before disassembling
the battery.
3. Wipe the battery terminal and surface with a
clean cloth, to remove the oxide scale on the
surface.
 8-17
January 24, 2017 Structure Function Principle
CLG835H Power System

4. Connect the charger positive (+) clip to the 9. Check the hydrometer state once every hour
battery positive (+) terminal, while charger during battery charging. The green battery
negative (-) clip to the battery negative (-) ter- hydrometer indicates that the battery has
minal at room temperature. Confirm that the been fully charged, and stops charging at this
battery terminals are clean, and the charging time.
circuit is in good connection.
10. Coat the terminal with Vaseline after the
5. Charge the battery with the charger of 16.0V charging is completed, to prevent galvanic
(within 16.2V) constant voltage until the bat- corrosion.
tery hydrometer turns green. The green
hydrometer indicates that the battery is fully Precautions for battery charging
charged.
1. Never charge two batteries in series.
6. On condition that constant voltage is unavail-
able, use constant current instead. Charge 2. Maintain a ventilated environment during
the battery with 12A charging current until the charging, and charge at a normal tempera-
battery hydrometer turns green. The green ture.
hydrometer indicates that the battery is fully 3. If acid is sprayed from the battery vent during
charged. charging, the charging shall be stopped
The relative relationship of auxiliary charging immediately.
time with voltage of battery: 4. Charge the battery in well-ventilated area,
Battery 12.45~12 12.45~12 12.45~12 12.45~12
and pay attention to the electrical safety.
voltage .55V .35V .20V .05V 5. Any battery that leaks or has a broken hous-
Recharg- ing, shall rather be scrapped than recharged.
2 hours 3 hours 4 hours 5 hours
ing time
6. Any battery that has a broken terminal, shall
Battery 12.45~11 11.95~11. 11.80~11. 11.65~11.
rather be scrapped than recharged.
voltage .95V 80V 65V 50V
Recharg- 7. Any battery that is inflated or bulged for over-
6 hours 7 hours 8 hours 9 hours
ing time discharge or overcharge, shall rather be
Battery 11.50~11. 11.30~11. Below scrapped than recharged.
voltage 30V 00V 11.00V 8. If the hydrometer remains black after being
Recharg- charged for a period of time, check whether
10 hours 12 hours 14 hours
ing time the charging cable is well connected, the joint
point is clean, or the charging voltage
7. For the battery suffering severe power loss, it
reaches 16V.
may be non-chargeable at the beginning of
charging. As battery charging proceeds, the Steps of battery troubleshooting
charging current of battery can return to nor-
mal gradually. It takes about 14 hours to com- The machine is in braking state, while the shift
plete the charging process. control lever is in neutral position. The densime-
8. If the battery temperature gets too high ter mounted inside the battery cover is green.
(approximately 45 °C) during the charging The test in this step need assist of partner.
process, stop charging the battery until the 1. Turn the negative switch to position "0".
battery is cooled to room temperature, then
recharge it through halving the charging cur- 2. Turn the digital multimeter to 50 V of voltage
rent. position.
8-18
Structure Function Principle January 24, 2017
Power System CLG835H

3. Connect the red probe of DMM to the positive The relay is assembled around the centralized
terminal of one battery, while the black probe control box of electric appliance.
to the negative terminal of the other battery.
Be sure not to connect them to the cable ter-
minals. The value displayed on the DMM
shall be controlled within "24" to "32" V.
4. Keep the two pointers of the digital multime-
ter still. Put disconnect switch in the position
of "I". Switch on the electrical lock and start
the diesel engine.
5. The value displayed on the DMM is between
"20" to "24"V at the moment the cranking
motor starts running. The value returns to
that described in step 3 once the diesel
engine starts smoothly.
Any battery that is capable of completing the
above steps and successfully starting the diesel P18E00012
engine, is in good service condition; otherwise,
test by following steps.
1. Disconnect all the battery connecting cables,
thereby, two batteries are completely discon-
nected.
2. Turn the digital multimeter to 50 V of voltage
position.
3. Connect the red probe of DMM to the positive
terminal of one battery, while the black probe
to the negative terminal, the value displayed
on the DMM is around "12" to "16" V.
4. Inspect the other battery according to step3.
The displayed value is the same as the step
3. Any battery that fails to implement the test P18E00013
procedures, shall be charged or replaced.
Precautions
Power supply relay
+A1 indicates the current input direction, and -A2
The machine is equipped with a relay for power shows the current output direction. In the case of
control, besides, other than normally closed connection error, the inoperative magnetic
contacts, a group of normally open contacts is blowout function of contactor will shorten its
also provided. Both the relay parameters and service life.
internal schematics are labeled on the relay Socket relay is concentrated on the control box,
housing. The rated current of normally open of which the location schematic and function
contacts on the relay contact circuit is 100A. diagram are as shown below. The location and
Apply +24 V voltage to the relay coil, then the function definitions of socket relay will not appear
electromagnetic force generated by the hereinafter.
energized attracts the armature inside the relay,
whereby, the normally open contracts switch on.
 8-19
January 24, 2017 Structure Function Principle
CLG835H Power System

P18E00014
8-20
Structure Function Principle January 24, 2017
Power System CLG835H

S/N Definition PDM number S/N Definition PDM number

K1 Electric horn 31B0173 K13 Front window washer 31B0173
K2 Brake light 31B0173 K14 Auto swing arm shock absorber 31B0173
K3 Fan reversing 31B0173 K15 Back-up Alarm 31B0173
K4 Defroster 31B0173 K16 G Relay 31B0173
K5 Secondary steering 31B0173 K17 D Relay 31B0173
K6 Standby 31B0173 K18 Starting protection 31B0173
K7 Standby 31B0173 K19 Neutral startup interlock 31B0173
K8 Ready to regenerate 31B0173 K20 Boom limit 31B0173
K9 Fuel lift pump 31B0173 K21 Bucket positioning 31B0173
K10 Standby 31B0173 K22 Standby 31B0173
K11 Wiper Position 2 31B0173 K23 DCU power 31B0095
K12 Wiper Position 1 31B0173 K24 Heating valve 31B0095
FL1 Flasher 31B0005

Troubleshooting procedures of power relay

1. Remove the relay from the relay socket.

2. Turn the digital multimeter to 200 Ω of Ω position.
3. Connect the red probe of DMM to the relay terminal "86", while the black probe to terminal "85", the
value displayed on DMM shall be around "330Ω" thereby.
4. Turn the digital multimeter to 200 Ω of Ω position.
5. Connect the one probe of DMM to the relay terminal "30", while the other to terminal "87", the value
displayed on DMM shall be "1" thereby;
6. Apply +24V external power (+) to the terminal "86" of relay, while (-) to terminal "85"; on the other
hand, connect one probe of DMM to the terminal "30" of relay, the other probe to terminal "87",
thereby, the DMM displayed value shall be "0".
After completing the above steps, if the values displayed on DMM conform to that described in the steps,
the relay is in good service condition.
The above steps are inapplicable to the operating contacts where the abrasion is very severe.
 8-21
January 24, 2017 Structure Function Principle
CLG835H Starting module

Starting module

Schematic diagram of starting module

P18E00015
8-22
Structure Function Principle January 24, 2017
Starting module CLG835H

Analysis of the electrical schematic diagram

1. Turn on negative switch and switch electric lock to "IGN", the analysis of the schematic diagram
hereof can be found in the power supply system;
2. Turn the shift control lever to neural position, No.584 wire of the ZF shift controller outputs a high
level signal of (+24V); No.800 wire of engine D+ outputs a low level;

P18E00016
 8-23
January 24, 2017 Structure Function Principle
CLG835H Starting module

3. After the electric lock is rotated to START;

P18E00017

4. After the machine starts, No.800 wire of alternator D+ outputs high level signal, and starter protection
function is enabled, at the same time release electric lock from "START" to "IGN".

P18E00018
8-24
Structure Function Principle January 24, 2017
Starting module CLG835H

Start Contactor Troubleshooting procedures of contactor

1. Turn the digital multimeter to 200 Ω of Ω posi-
A contactor of 100A is equipped in the machine tion.
to control the start. The rated load current of the
contactor contact circuit is 100A, only a group of 2. Connect both probes of DMM to the connec-
operating contacts are provided as normally tor terminals of the contactor respectively, the
open contacts. Apply +24V voltage to the contac- value displayed on DMM shall be around
tor coil, and the generated electromagnetic force "96Ω" thereby.
drives the internal armature to switch on the 3. Connect both probes of DMM to the bolts
operating contact-normally open contact against (the operating contact terminals) of the con-
the spring force. Whereby, the external circuit, of tactor respectively, the value displayed on
which the rated load current is 100A, is con- DMM shall be around "1" thereby.
nected. Disconnect +24V applied voltage to the
contactor coil, the contactor recovers to reset 4. Apply +24 V power to the connector (coil ter-
condition. minal) of contactor, while connect both
probes of DMM to the bolts of contactor
respectively, the value displayed on DMM
shall be around "0" thereby.
After completing the above steps, if the values
displayed on DMM conform to that described in
the steps, the contactor is in good service condi-
tion. The above steps are inapplicable to the
operating contacts (normally open) where the
abrasion is very severe.

P18E00019 Relay

The rated load current of MINI relay is 10A/20A

with two groups of operating contacts equipped,
therein, the load current of normally open contact
is 20A, while that of normally closed contact is
10A. Apply +24V voltage to the relay coil, and
the generated electromagnetic force switches on
the operating contact-normally open contact.
Whereby, the external circuit, of which the rated
load current is 20A, is connected. Disconnect
+24V voltage to the relay coil, the relay recovers
to reset condition.
P18E00020

Precautions
A1+ indicates the current input direction, and A2-
shows the current output direction. In the case of
connection error, the inoperative magnetic blow-
out function of contactor will shorten its service
life.
 8-25
January 24, 2017 Structure Function Principle
CLG835H Starting module

MINI relay is concentrated on the control box. Starting Motor

The starter motor equipped in the machine is

configured for 24V/5.5kw. The DC motor within
the starter motor translates the electrical energy
of battery into mechanical energy, whereby the
internal transmission gear drives the motor fly-
wheel to start the engine.

P18E00021

Steps of relay troubleshooting

1. Turn the digital multimeter to 200 Ω of Ω posi-
tion.
2. Connect the red probe of DMM to the relay P18E00022
terminal "1", while the black probe to terminal
"2", the value displayed on DMM shall be
around "155" thereby.
3. Connect the one probe of DMM to the relay
terminal "5", while the other to terminal "3",
the value displayed on DMM shall be "1"
thereby; change the probe on the terminal "5"
to the terminal "4" , the value displayed on
DMM shall be "0".
4. Apply +24V external power (+) to the terminal
"1" of relay, while (-) pole to terminal "2"; on
the other hand, connect one probe of DMM to
the terminal "5" of relay, the other probe to
terminal "3", thereby, the DMM displayed
value shall be "0". Shift the probe at terminal
"5" to terminal"4", the value displayed on
DMM shall be "1".
After completing the above steps, if the values
displayed on DMM conform to that described in
the steps, the relay is in good service condition.
The above steps are inapplicable to the operat-
ing contacts (both normally open and closed con-
tacts) where the abrasion is very severe.
8-26
Structure Function Principle January 24, 2017
Starting module CLG835H

Connect
positive cable

After #460

Connect with
the cable (-)
P18E00023

Alternator

As the main power unit of the machine, the alternator translates the energy from diesel engine into ser-
viceable electric energy of electrical equipment. The electrical components are configured for 24V/100A,
with electronic voltage regulator equipped inside. The alternator is connected in parallel with the battery
to power the machine. The battery supplies power to the electrical components before the diesel engine
starts; then after it starts, alternator powers the electrical components while charging the battery. Once
the energy of alternator fails to meet the needs of the electrical components, the alternator and battery
jointly power the machine.
This machine uses three terminals of generator, i,e. 1. Battery Positive;2. Ground;3.LAMP (D+).

M8×1.25 THREAD
BATTERY TERMINAL

M5×0.8 THREAD
LAMP TERMINAL

M5×0.8 THREAD
PHASE TERMINAL M6×1.0
THREAD
GROUND
TERMINAL

P18E00024
 8-27
January 24, 2017 Structure Function Principle
CLG835H Starting module

Precautions
The alternator of the machine is strictly prohibited to power the electrical equipments on the machine
separately in the absence of battery.
Metal tools or other metal conductors shall be kept away from the "B +" (Battery Positive) terminal and
"Ground" terminal of generator during operating the diesel engine. In order to avoid short-circuit. Short
circuit on the engine will lead serious results.
Troubleshooting procedures of alternator
Differing from the introduced fault detection methods for other components, the alternator fault detection
is implemented on the entire machine, which shall not be removed for individual inspection.
The following detection steps are inapplicable to the cases where the battery is fully charged and the ter-
minal voltage reaches 25V or above.
1. Turn the digital multimeter to 200V of voltage position.
2. Turn on disconnect switch of the machine, do not start the diesel engine, put red probe of a digital
multimeter over "B+" end of an alternator, put black probe over "Ground" terminal of the alternator,
and write down displayed value of the digital multimeter. The normal value is about 24-25 V.
3. Start diesel engine, step on accelerator, follow the measuring method described in step 2, and note
down the value on DMM again. Such value shall be higher than the measured value in step 2,
whereby, the alternator is in normal condition.
The above test procedures shall be implemented on unloaded machine (unload: the condition that the
electric lock is switched on, yet all the electrical switches or components on the machine are switched
off).
If the value on DMM is unchanged through the tests in steps 2 and 3, switch off the electric lock to
inspect the alternator as per the following steps.
1. Inspect the transmission belt of alternator in accordance with the methods introduced in the specifi-
cation. Readjust if it is too loose.
2. Check the security of alternator terminal, and fasten it with a wrench if necessary.
If the above-mentioned methods fail to solve the problem, please contact maintenance service sites of
LiuGong and Perkins.
8-28
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Monitoring system

Circuit for engine water temperature indication

P18E00025

This machine uses Perkins Electric Injection Engine whose ECM sends the water temperature (WT) sig-
nal to the meter by CAN bus. The meter microcontroller processes information after reading WT data,
and finally to actuate the engine water-thermometer.

Circuit for torque converter oil temperature indication

P18E00026

The temperature sensor used in the machine is resistance thermometer of contact type and negative
temperature coefficient. The resistance of its internal temperature sensitive elements changes along with
the temperature variation of measured medium, and the higher temperature of measured medium, the
lower resistance of temperature sensitive elements. Once the circuit is connected, the characteristics of
resistance changing with temperature are converted to that of voltage varying with temperature. The
changing voltage signal enters into the microcontroller of combination instrument, which outputs signal
through the operation processing of microcontroller, to drive the stepping motor-type instrument for tem-
perature indication.
 8-29
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Torque converter oil temp sensor

P18E00027

Precautions
Switch off the electric lock, and replace the tem-
perature sensor until the machine is completely
cooled if necessary. Therein, measured liquid
overflows once the temperature sensor is loos-
ened, which shall be supplemented timely after
the replacement.
The detection of torque converter oil temp
sensor
1. Unplug the connector, through which the rear
frame harness connects to the temperature
sensor;
2. Disassemble the temperature sensor from
the complete machine;
3. Place the temperature probe of temperature
sensor into the liquid (water/ torque converter
oil), and heat the liquid, to evaluate the tem-
perature sensor performance based on the
parameters below.
Temperature Resistance Error± Max
Min value
(°C) (Ω) % value
0 33650 8.8 30700 36600
25 10000 7 9304 10700
90 865.5 2.1 847.3 883.7
8-30
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for oil pressure alarm

This machine uses Perkins Electric Injection Engine whose oil pressure signal is acquired and pro-
cessed by ECM. If ECM decides the oil pressure falls below a specified value after processing, it will
send alarm signal to the meter by CAN bus. The microcontroller actuates the appropriate alarm indicator
light to ON after reading this signal.

P18E00028

Circuit for transmission oil pressure alarm

For monitoring the pressure of shift control valve, the shifting oil pressure alarm indicator is lit once the
pressure of shift control valve is lower than 1.45Mpa.

P18E00029
 8-31
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Transmission oil pressure switch Test on pressure switch failures

1. Unplug the connector, through which the rear
Transmission oil pressure switch frame harness connects to the engine oil
pressure switch;
2. Remove the pressure switch from the com-
plete machine;
3. Assess the operating value of pressure
switch with pressure test bed, and the oper-
ating value of its normally closed contact is
1.45Mpa.
P18E00030

Precautions

Be sure to switch off the electric lock and wait

until the machine is fully cooled, to replace the
pressure switch if necessary.
Therein, measured liquid overflows once the
pressure switch is loosened, which shall be
supplemented timely after the replacement.

Circuit for fuel level indication

It is used to monitor the oil quantity of diesel tank.

P18E00031
8-32
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Fuel level sensor 2. Remove the fuel level sensor from the fuel
tank;
Floaters are applied in the sensor, which shift up
3. Turn the digital multimeter to 1000Ω of Ω
and down along with the oil level of the fuel tank.
position.
The floater influences the resistance value pass-
ing through the sensor. Once the circuit is con- 4. Connect the red probe to the terminal at #1
nected, the characteristics of resistance hole site of the sensor connector, while black
changing with oil level are converted to that of probe to #2 hole site;
voltage varying with oil level. The changing volt-
5. Measure the varied resistance values of fuel
age signal enters into the microcontroller of com-
level sensor corresponding to the different
bination instrument, which outputs signal through
positions of the floater;
the operation processing of microcontroller, to
drive the stepping motor-type instrument for oil
level indication.

Sealing washer

Oil level

Fuel level sensor

P18E00032

Precautions
Switch off the electric lock, and replace the fuel
P18E00033
level sensor until the machine is completely
cooled if necessary. When replacing, prevent for-
Earthing cable (black)
eign matters from getting into the diesel tank.
Sensor signal terminal (green)
Test steps of fuel oil level sensor faults
1. Disconnect the wiring harness of fuel level
sensor and the wiring harness of the com- P18E00034
plete vehicle;

Technical parameters (After floater rises to the top, then drop to test)
Floater position (H) Gear Resistance (Ω)
<65 Full level 68
65 8/9 136
94 7/9 204
123 6/9 272
152 5/9 340
181 4/9 408
210 3/9 476
242 2/9 544
277 1/9 612
316 0 level 680
 8-33
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Circuit for DEF level indication

It is used for monitoring the liquid level of DEF pot. This machine uses Perkins Electric Injection Engine
whose ECM sends the DEF liquid level signal to the meter by CAN bus. The meter microcontroller pro-
cesses information after reading liquid level data, and finally to actuate the DEF liquid level gauge.

P18E00035

Circuit for vehicle speed indication

For monitoring the machine speed condition. The output speed sensor, installed on the gearbox housing,
is used to detect the speed of gearbox output gear. The speed sensor consists of coil, permanent mag-
net and pole. The coil is wound outside the pole, and the pole is connected with the permanent magnet.
The magnetic field is formed around the permanent magnet, magnetic lines of force pass through air gap
and act on the teeth of gear, forming a closed magnetic circuit. When the gear is rotating, the magnetic
field acts on the tooth gap and tooth repeatedly, so the change in air gap is sometimes big and some-
times small; the flux changes with the air gap, and the changing flux induces sinusoidal signal in the coil,
which is in proportion to speed. Connect to ZF harness, followed by being processed in the electrical
control unit, the processed signal therefrom is sent to the instrument.

P18E00036

Service brake indication circuit

When sercive brake pressure is less than 9MPa, the pressure switch turns on and brake low pressure
indicator turns on.

P18E00037
8-34
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Low pressure alarm pressure switch of Test on pressure switch failures

service braking
1. Unplug the connector connected to pressure
switch in the rear frame harness;
2. Remove the pressure switch from the com-
plete machine;
3. Assess the action value of pressure switch
with pressure test bed, and its contact type is
normally closed with action value up to 9Mpa.

P18E00038

Wiring schematic diagram of braking

When parking brake switch is pressed down, connect pin 3 and 4. When brake pressure is less than
11MPa, the low pressure alarm switch of parking brake turns on and indicator turns on.
When brake pressure is less than 7MPa, control pressure switch of parking brake turns off, parking
brake valve is outage and tyre is locked by action of brake.

P18E00039
 8-35
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

XE7 Parking brake low pressure alarm Parking brake control pressure switch
switch

P18E00041
P18E00040
Test on pressure switch failures
Test on pressure switch failures
1. Unplug the connector connected to pressure
1. Unplug the connector connected to pressure switch in the rear frame harness;
switch in the rear frame harness;
2. Remove the pressure switch from the com-
2. Remove the pressure switch from the com- plete machine;
plete machine;
3. Assess the action value of pressure switch
3. Assess the action value of pressure switch with pressure test bed, and its contact type is
with pressure test bed, and its contact type is normally open with action value up to 7Mpa.
normally closed with action value up to
11Mpa.
8-36
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for parking brake power cut-off

P18E00042

When the parking brake switch is pulled up, pin 1 and 2 is connected, the input signal of gearbox power
cut-off is high, and the complete machine lie in the status of power cut-off, at the same time power cut-off
indicator turns on.

P18E00043
 8-37
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

When the brake pressure is less than 6MPa, parking brake clutch on/off switch turns on, the input signal
of gearbox power cut-off is high, and the complete machine lie in the status of power cut-off, at the same
time power cut-off indicator turns on.

P18E00044
8-38
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Parking brake power cut-off Switch Parking brake button

This switch includes a button and two contact

modules (one is normally open, the other is nor-
mally closed). Press up the button, the normally-
closed contact (1,2) is active, the normally-open
contact (3,4) is inactive. When pressing down the
button, the normally-closed contact is in active
and normally-open contact active.

P18E00045

Test on pressure switch failures

1. Unplug the connector connected to pressure
switch in the rear frame harness; P18E00046
2. Remove the pressure switch from the com-
plete machine;
3. Assess the action value of pressure switch
with pressure test bed, and its contact type is
normally closed with action value up to 6Mpa.

P18E00047
 8-39
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Circuit for service brake clutch on/off

Turn the clutch on/off switch to "on/off", the service clutch shutoff pressure switch is turned on once the
brake pedal is pressed during the service, and the indicator of clutch shutoff switch on instrument is lit.
This function is active only when the position selector is at I or II position.

P18E00048

Pressure switch for service power cutoff Clutch on/off switch

POS3 indicates to select the service clutch shut-

off function, while on the other hand, POS1 signi-
fies not to select such function.

P18E00050
P18E00049

Precautions
Be sure to switch off the electric lock and wait
until the machine is fully cooled, to replace the
pressure switch if necessary.
Test on pressure switch failures
1. Unplug the connector connected to pressure
switch in the cab harness;
2. Remove the pressure switch from the com- P18E00051
plete machine;
3. Assess the action value of pressure switch
with pressure test bed, and its contact type is
normally open with action value up to
1.5Mpa.
8-40
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for air filter blockage alarm

The intake air filter alert indicator is lit if the intake resistance exceeds 6.3KPa. The type of air filter block-
age alarm switch is normally open.

P18E00052

Circuit for alternator charging indication

It is used for monitoring whether the alternator supplies power to the external circuit after the machine
starts. The indicator goes out, which means the engine is in the state of supplying power outward.

P18E00053
 8-41
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Analysis of the schematic diagram

1. When the complete vehicle is energized but not started, D+ terminal of alternator is under low level,
at which the relay acts due to the voltage difference at the end 85 and 86, pin 30 and 87 of relay is
connected to make No.802 wire suspend and indicator turns on.

P18E00054

2. After entire vehicle starts, if engine is normal, D+ terminal should output high level, at which the relay
stays at normally-closed contact due to "Zero" voltage difference at the end 85 and 86, pin 30 and
87a is connected to make No.802 wire energize and indicator turns off.

P18E00055
8-42
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for voltage indication

For monitoring the machine system voltage, lights when the machine power voltage is lower than 24.8V,
extinguishes when within 24.8-29.5 V, lights when within 29.5-31.5 V, and blinks when greater than
31.5V.
The machine uses Perkins Electric Injection Engine whose ECM sends the voltage parameter of com-
plete machine to the meter by CAN bus after monitoring and reading. The meter judge the range of volt-
age by analysis of CAN agreement, eventually to control the ON/OFF of voltage indicator.

P18E00056
 8-43
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Circuit of preheat indicator

The Perkins Electric Injection Engine equipped in this machine, whose preheating uses glow plug sys-
tem plan. When glow plug works before starting, WTS indicator of meter turns on.
Control flow diagram of glow plug

P18E00057
8-44
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Schematic diagram

P18E00058

Circuit for seatbelt indicator

When the seatbelt is not buckled up, this indicator is active.

When the seatbelt is buckled up, this indicator turns off. At the same time, the rear seatbelt indicator of
cab roof turns on.

P18E00059

Circuit for lube system failure indicator

When the failure occurs in the lube system, the appropriate indicator light is active.

P18E00060
 8-45
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Circuit for lube system activated indicator

When the centralized lube function is activated, this indicator light is ON.

P18E00061

Circuit for steering system failure indicator

When the pressure of steering system is less than 0.6Mpa, the pressure switch contact is closed. If the
instrument indicator is active. it indicates the steering system failure.

P18E00062

Failure detection for steering system low-voltage alarm switch

1. Unplug the connector connected to pressure

switch in the rear frame harness;
2. Remove the pressure switch from the com-
plete machine;
3. Assess the action value of pressure switch
with pressure test bed, and its contact type is
normally closed with action value up to
0.6Mpa.

P18E00063
8-46
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for secondary steering indicator

When the secondary steering function is active, this indicator light is ON. The secondary steering func-
tion has two kinds of enabled methods: manual and automatic.

P18E00064

Manual method is controlled by secondary steering switch, schematic analysis:

P18E00065
 8-47
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Automatic method controls signal by instrument output, schematic analysis:

P18E00066

Timing diagram of secondary steering control signal output by instrument:

Power on or hang

Earthing Ground (failure)

Steering system failure signal
Vehicle speed >5km/h

Vehicle speed =0km/h

Speed signal
Power voltage

Secondary steering output signal

P18E00067
8-48
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Troubleshooting for secondary steering pressure switch

1. Unplug the connector connected to pressure switch in the rear frame harness;
2. Remove the pressure switch from the complete machine;
3. Assess the action value of pressure switch with pressure test bed, and its contact type is normally
open with action value up to 0.6Mpa.

P18E00068

Circuit of ride control indicator

You can select manual and automatic methods according to actual situations. In auto mode, it is active
when the speed is greater than 7 km/h.

P18E00069
 8-49
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Manual method, move the ride control switch to manual gear, schematic analysis:

P18E00070

Automatic method, move the ride control switch to automatic gear and instrument output control signal
according to vehicle speed, schematic analysis:

P18E00071
8-50
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Ride control switch

POS1 is in manual mode, while POS3 is in auto

mode.

P18E00072

P18E00073
 8-51
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Circuit for radiator fan reverse indicator

When the radiator fan reverse indicator switch is pressed down, this indicator is ON. If the reverse signal
is not received within 1 s, this indicator is out.

P18E00074

Fan reversing switch, manual

This switch is active instantly. When in POS1

mode, the fan reverse function is active.

P18E00076

P18E00075
8-52
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Circuit for engine indicator

The Perkins Electric Injection Engine equipped in this machine, whose ECM transports to failure indica-
tor, stop indicator, preheating indicator, and alarm indicator of low fuel pressure to the meter by CAN bus,
and the meter drive indicator to be active.

P18E00077

Circuit for engine diesel particle filter indicator

The Perkins Electric Injection Engine equipped in this machine, whose ECM transports to the emission
system failure indicator related to diesel particulate filter system and DEF liquid level indicator to the indi-
cator module by CAN bus, and the indicator module drive indicator to be active.

P18E00078

Circuit for latency shut-down indicator

The indicator is active, which indicates engine DEF system still works. Therefore, the disconnect switch
cannot be turned off until indicator turns off, otherwise, which may cause DEF pipeline failure.

P18E00079

Latency shut-down indicator

P18E00080
 8-53
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Instrument

Two instruments equipped in this machine are main instrument and accessory instrument (indicator
module), which both are electronic combination instrument.

Main instrument

Main instrument is divided into three indicator zones: pointer type instrument zone, indicator alarm zone
and LCD display zone.
Pointer type instrument zone

Engine water
Fuel level gauge
temp gauge
Torque converter oil
DEF level gauge
temperature gauge

P18E00081

Indicating area
Items
The first region The second area (green) The third area (red)
Engine water temp
40-70°C(Yellow) 70-101°C 101-120°C
gauge
Torque converter oil
40-60°C(Yellow) 60-116°C 116-140°C
temperature gauge
Fuel level gauge 0-0.2(red) 0.2-1
DEF level gauge 0-0.2(red) 0.2-1
8-54
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Indicator alarm zone

Color of Whether The input sig- The input sig-
S/N Name the warn- it flashes nal level under nal level under Icon
ing light or not normal state alarm state

Flashing and
1 Left turn indicator Green Yes Hang intermittent
signal

Flashing and
2 Right turn indicator Green Yes Hang intermittent
signal

Front floodlight high beam indi-

3 Blue No Hang +24V
cator

4 Power-off indicator Yellow No Hang +24V

5 Parking brake indicator Red No Hang +24V

Engine oil pressure alarm

6 Red No CAN bus actuated
lights

Brake low pressure warning

7 Red No Hang +24V
lights

Transmission oil pressure

8 Red No Hang Earthing
warning lights

Engine air filter blockage indi-

9 Red No Hang Earthing
cator

Set the D+ or L terminals of the

10 Alternator charging indicator Red No alternator as charging indicating
control

11 Preheating indicator lamp Amber No CAN bus actuated

12 Heater activated indicator Yellow No Hang +24V

 8-55
January 24, 2017 Structure Function Principle
CLG835H Monitoring system

Indicator alarm zone

Color of Whether The input sig- The input sig-
S/N Name the warn- it flashes nal level under nal level under Icon
ing light or not normal state alarm state

13 State indicator Red Yes

14 Transmission alert indicator Red No Hang +24V

15 FNR state indicator Yellow No Hang +24V

16 Voltage indicator Yellow Yes CAN bus actuated

17 Stop indicator Red No CAN bus actuated

18 Warning indicator Amber No CAN bus actuated

19 Water in fuel indicator Amber No CAN bus actuated

Sub instrument

P18E00082
8-56
Structure Function Principle January 24, 2017
Monitoring system CLG835H

Whether The input signal The input signal

Color of the
S/N Name it flashes level under level under Icon
warning light
or not normal state alarm state

Lube system activated

1 Green No Hang +24V
indicator

2 Lube system fault indicator Red No Hang Earthing

DPF regeneration disabled

3 Amber No CAN bus actuated
indicator

4 DPF regenerating indicator Amber Yes CAN bus actuated

DPF regeneration activated

5 Amber No CAN bus actuated
indicator

6 DEF low indicator Red No CAN bus actuated

7 Seatbelt warning light Red No +24V Hang

Steering system failure

8 Red No Hang Earthing
indicator

9 Secondary steering indicator Yellow No Hang +24V

Ride control activated

10 Green No Hang +24V
indicator

11 Radiator fan reverse indicator Yellow No CAN bus actuated

12 Hydraulic oil temp alarm light Red No Hang Earthing

 8-57
January 24, 2017 Structure Function Principle
CLG835H Sound and Light Alarm System/Audible and Visual Alarm System/Acousto-optic alarm system

Whether The input signal The input signal

Color of the
S/N Name it flashes level under level under Icon
warning light
or not normal state alarm state

Emission system failure

13 Red No CAN bus actuated
indicator

If any one of the parking brake, brake low pressure, engine oil pressure, engine air filter block-
age, lube system failure, gearbox oil pressure and gearbox failure alert indicators is active, the state indi-
cator flickers; when and one of the parking brake, brake low pressure and engine oil pressure alarm
indicators is active, and the signal that the engine is activated is detected, the buzzer sounds.

Sound and Light Alarm System/Audible and Visual Alarm System/

Acousto-optic alarm system

Circuit for electric horn

Three horn buttons are connected in parallel in the machine, locating on the steering column, combina-
tion lever and pilot-operated lever.

P18E00083
8-58
Structure Function Principle January 24, 2017
Sound and Light Alarm System/Audible and Visual Alarm System/Acousto-optic alarm system CLG835H

Electric horn Detection procedure of combination lever

1. Disconnect the wiring harness of the combi-
Electrical parameters: 1. rated voltage 24V; 2.
nation lever and the cab;
maximum working current 3A; 3. basic frequency
400±20Hz; 4. sound level 105dB-118dB(A) 2. Separate the combination lever from the
steering column;
3. Turn the digital multimeter to 200Ω of Ω posi-
tion.
4. Measure whether the pins are energized cor-
responding to the different function positions
of the lever based on the function wiring dia-
gram;

Wipers reset Red

P18E00084
OV Output Yellow
Steps of electric horn troubleshooting
Wipers at
position2 Green
1. Connect the 24V DC power (+) to the termi-
Wipers at Black
nal at #1 hole bit of the horn, thereby, while position1 yellow
DC power (-) to the terminal at #2 hole bit;
2. Turn on the DC power;
Horn Brown/yellow
3. The horn alarms at a sound level within Water spray Blue
105dB-118dB(A).

Combination lever Left turning White black

Right turning :KLWH
It integrates the functions of horn, front wiper,
front washer, turn signal light and dimmer switch.
Blue white
Floodlight
power Yellow green

Low beam Blue yellow

High beam Purple yellow
Flashing power supply Black
P18E00086

Input terminal of the handle

Blue Green
Yellow Black yellow

White black Purple yellow

Black Yellow green

P18E00085 White Blue yellow

Brown yellow Red

P18E00087
 8-59
January 24, 2017 Structure Function Principle
CLG835H Sound and Light Alarm System/Audible and Visual Alarm System/Acousto-optic alarm system

Circuit for backup alarm

P18E00088

Backup alarm

An intermittent buzzer is applied as the backup The electrical parameters of backup alarm
alarm, which works together with the backup light
during the operator's backup operation. 1. Rated voltage 24V; 2. working current 0.3A;
3. sound level 107dB±4dB(A).

The detection procedures of backup alarm

1. Connect the 24V DC power (+) to the termi-

nal at #1 hole site of the backup alarm, while
the (-) to the terminal at #2 hole site;
2. Turn on the DC power;
P18E00089 3. Back up alarm makes alarm sound and the
sound level is in the range of 107dB±4dB(A).

P18E00090
8-60
Structure Function Principle January 24, 2017
Wiper and washer system CLG835H

Wiper and washer system

Circuit diagram for wiper and cleaning system

The functions of front wiper and front washer are implemented through the combination lever.

P18E00091

Rear wiper, rear window washer are all enabled by rocker switch.

P18E00092
 8-61
January 24, 2017 Structure Function Principle
CLG835H Wiper and washer system

Wiper motor
Rear wiper motor
Front wiper motor

P18E00095
P18E00093

Surface of the connector

Low speed (green)
Surface of the connector
High speed (blue wire)
Low speed (green)

High speed (blue wire) Cathode (black wire)

Anode (red wire)

Cathode (black wire)

Anode (red wire) Reset (white wire)

P18E00096
Reset (white wire)
P18E00094
8-62
Structure Function Principle January 24, 2017
Wiper and washer system CLG835H

Washer reservoir

P18E00097

Surface of the connector

Negative cable Positive cable

(Black) (Redε
P18E00098
 8-63
January 24, 2017 Structure Function Principle
CLG835H Positioner and kickout system

Positioner and kickout system

No matter the operator lower or lift the boom through pushing the control lever forward or backward, the
control lever remains automatically in a forward or backward position, which returns to the neutral posi-
tion automatically if the boom is lifted to the limit; on the other hand, when the boom is lowered to the
limit, it requires the operator to move the control lever back to the neutral position instead of its automatic
return. If the operator withdraws the bucket by pushing the control handle to the left, the control handle
will remain in the position towards the left, which returns to the neutral position automatically once the
bucket is leveled.

Principle for auto reset system

P18E00099
8-64
Structure Function Principle January 24, 2017
Positioner and kickout system CLG835H

Test on bucket and boom proximity switches

Approach switch
1. Connect the 24V DC power (+) to the termi-
Boom limit nal at #1 hole of the proximity switch, while
approach switch the (-) to the terminal at #2 hole;
Bucket limit
approach switch 2. Turn on the DC power;
3. Draw the metal induction board to the induc-
tive surface of proximity switch, the proximity
distance shall be less than or equal to 12mm,
while the induction area shall be equal or
greater than 2/3;
4. At this moment, the LED at the end of the
switch is lighted up;
5. Turn the digital multimeter to 200V of voltage
position.
P18E00100 6. Connect the black probe to the DC power (-),
while the red probe to the terminal at #3 hole
site of the parking brake switch, thereby, the
value displayed on the DMM shall be 24V.

P18E00101

Shaded area is the

effective induction part

P18E00102
 8-65
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Lighting system

The reverse light is used to illuminate the area behind the vehicle when reversing. The machine is
equipped with backup alarm, which works together with the backup light during backup operation. The
brake light is used to alarm vehicles behind that this vehicle is braking.
The turn signal light indicates the direction to that the vehicle is turning, and the potential danger signals
(when used as parking light).
The position lights are used for driving or operating at night, which indicate the relative location of the
machine. The front headlamp and the rear headlamp are used to illuminate for the whole vehicle driving
and working. The working light is mainly applied to lighting of complete machine. Dome light is used for
illuminating and reading in the cab at night.

Circuit for front frame illumination

P18E00103
8-66
Structure Function Principle January 24, 2017
Lighting system CLG835H

Position light & floodlight sw

P18E00104

P18E00105

P18E00106
 8-67
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Hazard flasher switch

P18E00107

P18E00108

POS3 indicates the closed parking function, while POS1 signifies the enabled parking function.

P18E00109
8-68
Structure Function Principle January 24, 2017
Lighting system CLG835H

Front combination light

Function of integrated steering, high/low beam

and clearance light.

Right front
combination light Left front
combination light

Turn
High beam lightφ Position lightφ signal lightφ
24V/75W 24V/5W 24V/21W
P18E00110 Low beam lightφ24V/70W P18E00111

Circuit for cab lighting

P18E00112
 8-69
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Work light switch

Front working light switch: POS3 means the

working light is turned Off; POS1 means the
working light is turned ON.

P18E00116
P18E00113

P18E00114

Rear working light switch: POS3 means the

working light is turned OFF; POS1 means the
working light is turned ON.

P18E00115
8-70
Structure Function Principle January 24, 2017
Lighting system CLG835H

P18E00117

Work light

This machine is equipped with six work lights, front; four lights, rear: two lights. Electrical equipment
parameters: 1. Rated working voltage is 24 V; 2. Rated power 70W.

Rear work light

Rear work light

Front work light

Front work light

P18E00118
 8-71
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Dome light

Electrical equipment parameters: 1. Rated working voltage is 24 V; 2. Rated power 10W.

P18E00119

Circuit for rear frame illumination

P18E00120
8-72
Structure Function Principle January 24, 2017
Lighting system CLG835H

Brake light switch

P18E00121

After pressing the brake pedal, 1. The brake light switch acts, 2. Brake light is lit, 3. Brake light is lit.

P18E00122

Precautions
Be sure to switch off the electric lock and wait until the machine is fully cooled, to replace the pressure
switch if necessary. Therein, measured liquid overflows once the pressure switch is loosened, which
shall be supplemented timely after the replacement.
Test on pressure switch failures
1. Unplug the connector, through which the rear frame harness connects to the engine oil pressure
switch;
2. Remove the pressure switch from the complete machine;
3. Assess the action value of pressure switch with pressure test bed, and its contact type is normally
open with action value up to 0.5Mpa.
 8-73
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Rear combination light Shift control system

Integrate functions of steering, driving/braking
and backup light. The electronic control unit EST 125 of the shift
control system receives the external signals from
Rear right gear selector, speed sensor and KD button, pro-
combination light cess such signals and send them to CPU for
Rear left computing. Eventually, CPU drives the shift con-
combination light
trol valve combination located on the transmis-
sion by virtue of the output circuit, to get the
operator selected gear.
The 4WG-158 transmission assembled in the
machine is 4-speed transmission, with 4 gears
for forward and 3 for reverse. DW-3 gear selector
P18E00123 shifts reverse 4 gears, the electronic control unit
EST125 actually outputs the control signal of
Stop and
Reversing light (P21W) position reverse 3 gears.
Turn signal indicator (21W) light
(P21/5W)
190
The electronic control unit EST125 of the shift
control system receives the external signals from
gear selector, speed sensor and KD button, pro-
cess such signals and send them to CPU for
computing, where the driving state of vehicle is
determined by comparison signal between the
two speed sensors and other signals. Eventually,
CPU drives the shift control valve combination
located on the transmission by virtue of the out-
put circuit, to get the operator selected gear. Cer-
Reflex reflector P18E00124
tainly, as required by driving speed, this gear is
possibly lower than that selected by the operator,
but not higher than it.

P18E00125
8-74
Structure Function Principle January 24, 2017
Lighting system CLG835H

Principle for shift control

Shift control system is provided with the functions of neutral start interlock, clutch shutoff, backup alarm,
KD, FNR speed displays and manual/automatic shift.

Neutral start interlock function

If the DW-3 gear selector is shifted to gear N, the electronic control unit EST125 will output a high level
(24V) of #584, and the neutral interlock relay enabled. The exploded electrical schematic as follows:

P18E00126

KD functions

Apart from the KD button on DW-3 gear selector, another KD button is assembled on the pilot-operated
lever of the machine. The exploded electrical schematic as follows:

P18E00127
 8-75
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Function of backup alarm

If the DW-3 gear selector is shifted to gear R, #588 outputs a high level, and the backup alarm relay
enabled. The exploded electrical schematic as follows:

P18E00128

Power cut-off function

The power shutoff consists of parking clutch shutoff and service clutch shutoff, both of which shut off the
powers at gear I and II of the transmission. The parking power cutoff system is started once the stop
brake switch is pulled up, as shown below:

P18E00129

If the clutch on/off switch is turned on, the service clutch shutoff will start through press the brake pedal
during the service, schematics as follows:

P18E00130
8-76
Structure Function Principle January 24, 2017
Lighting system CLG835H

Function of indicating the speed

For the circuit of this part, please refer to Vehicle Speed Indicating Line Schematic Diagram.

Manual/automatic shift function

When the rocker switch is pressed down, turning on switch indicates automatic shift mode, and turning
off switch indicates manual shift mode

A/M SHIFT MODE SW

P18E00131

Manual/automatic shift rocker switch

P18E00132
 8-77
January 24, 2017 Structure Function Principle
CLG835H Lighting system

Electronic control unit Shift selector

As the core of the shift control system, the elec- The internal part of a gear selector consists of
tronic control unit EST125 processes and oper- many mini switches. When the operator selects
ates the signals of operator-selected gear, speed gears and directions, the internal micro switch
sensor, KD and engine shutoff. Whereby, works, and the changed gear and direction sig-
EST125 drives the solenoid valve group combi- nals ultimately enter into the electronic control
nation through outputting control signals, to unit EST125 through the connecting of harness.
implement the gear selection and shift of trans-
mission. Besides, EST125 also outputs neutral
signals, to drive the gear/neutral interlock relay to
act when the DW-3 gear selector is in neutral
position. Output the reversing alarm signal and
drive the reversing alarm relay to work.

P18E00133
P18E00135

Gear positions

P18E00136

Fault detection procedures of DW-3 shift

selector

1. Turn the digital multimeter to 200 Ω of Ω posi-

tion.
2. Move DW-3 gear selector to N1 position;
3. Test if only [B1, B3], [B1, AS], [B3, AS] are
pairwise energized;
4. Shift the gear selector to other appropriate
gears, and check the parallelism in accor-
dance with the gear logic diagram;
P18E00134
8-78
Structure Function Principle January 24, 2017
Lighting system CLG835H

5. The gear selector is in normal condition, provided that all the gears conform to the gear logic dia-
gram.

AUSGABE OUTPUT SIGNAL

YOWAERTS FORWARD RUECKWAERTS REVERS NEUTRAL
GANG GEAR
1 2 3 4 1 2 3 4 1 2 3 4 KD
AD1 B1 ● ● ● ● ● ●
AD2 B2 ● ● ● ● ● ●
AD3 B3 ● ● ● ● ● ● ● ● ● ● ● ●
AD4 V ● ● ● ●
AD5 R ● ● ● ●
AD6 AS ● ● ● ●
AD7 KD ●

AD3 (B3)

AD2 (B2)

AD1 (B1)

AD7 (KD)

ED1 (+/VP)

AD6 (N)

AD4 (V,F)
(VORWAERTS, FORWARD)

AD5 (R)
(RUECKWAERTS,REVERSE)
P18E00137
 8-79
January 24, 2017 Structure Function Principle
CLG835H Audio system

Audio system

Audio system principle

P18E00138
8-80
Structure Function Principle January 24, 2017
Audio system CLG835H

Radio

P18E00141

Antenna

P18E00139

Speaker

P18E00142

P18E00140
 8-81
January 24, 2017 Structure Function Principle
CLG835H Engine electric control module

Engine electric control module

DEF heater pipe

P18E00143
8-82
Structure Function Principle January 24, 2017
Engine electric control module CLG835H

Principle for exhaust disposal

P18E00144

Electronic throttle line

P18E00145
 8-83
January 24, 2017 Structure Function Principle
CLG835H Radiator fan control module

DEF pump supply module line

P18E00146

Radiator fan control module

Control strategy
Water temperature: 90°C~100°C, target temperature: 95°C, PID regulation, i.e. fan begins to accelerate
when the temperature is more than 95°C, or vice versa
Torque oil temperature: 105°C~110°C, linear adjustment, i.e. fan operates at the minimum speed when
the temperature is not more than 105°C and other temperatures are not in the adjustable range; fan
operates at the maximum speed when the temperature is more than 110°C; when the temperature is
between 105°C~110°C, an corresponding speed can be achieved through linear scale calculation.
Air-air intercooler: temperature control node: 40,Fmin; 55,F80%; 70,80%; 75,Fmax;
Electrical schematic diagram

Torque converter oil

temperature signal
Air-air intercooler (spare)

Hydraulic oil temperature signal

Direction-changing output
Auto reverse rotating signal
Manual reverse rotating signal

Water temperature (spare)

Proportional output

P18E00147
8-84
Structure Function Principle January 24, 2017
Electric proportional controller module of the third linkage CLG835H

Electric proportional controller module of the third linkage

The operation of the third linkage of pilot lever for grapple accessories can be achieved flexibly.
Principle interpretation: signal is input to the controller by the roller on scroll handle, and controller output
control signal to proportional valve according to input signal, eventually to control the opening of valve to
control accessories. Add a lock switch at the end of controller output signal to achieve safety protection.

Quick coupler handle 1 (1)

Quick coupler handle 2 (1)
Bucket tilting buffer sensing switch

Bucket angle signal (spare)

Attached
+5V Power supply output way 1 valve
Attached
way 2 valve
Bucket tilting
buffer relief valve

P18E00148

Electronic p.r controller

P18E00149
 8-85
January 24, 2017 Structure Function Principle
CLG835H Electric proportional controller module of the third linkage

Switch

P18E00150

Control lever

P18E00151
8-86
Structure Function Principle January 24, 2017
Seat heater CLG835H

Seat heater

Supply power to the sear after the complete machine is energized, and seat heater is controlled the ON/
OFF by the switch on the seat.

P18E00152

Seat
heater switch

P18E00153
 8-87
January 24, 2017 Structure Function Principle
CLG835H Backup monitoring system

Backup monitoring system

Backup monitoring system is composed of display screen, camera, power cable and connection cable.

Display
screen

Power cable

Connection cable Camera

P18E00154
Connection diagram

Power input line (green) (backup trigger line) camera 1

Power input line (white) camera 2

Power input line
(red) (DC power input)

Ground (black)
Black 13 core connector
connects to display

Connect camera V2 (V2 normal)

Connect camera V1 (V1 rear view camera)

P18E00155
8-88
Structure Function Principle January 24, 2017
Backup monitoring system CLG835H

Display screen 2. Switch

Switch button "POWER" controls the on/off of
the monitoring system, while the switch button is
unavailable at the triggered state.
Menu
Camera
Camera option
Switch

P18E00156 Infrared LED display

Audio receiver
1. Camera Option
When the monitoring system is active, whether
triggered, the camera 1 or 2 can be selected by
P18E00157
button "CAM SELECT".

Power cable

CAM1

CAM2

White Trigger CAM2

Green Trigger CAM1
Red DC 12/24 V
Black Ground P18E00158

Circuit principle of the cab wire terminal power supply

P18E00159
 8-89
January 24, 2017 Structure Function Principle
CLG835H Appendix

Appendix

Distribution diagram of front frame harness connector

P18E00160
8-90
Structure Function Principle January 24, 2017
Appendix CLG835H

XQ6

XQ5

XQ1

XR4b

XQ4
XQ8 XQ3

XQ7b

XR2b

XR4、XR5

P18E00161
 8-91
January 24, 2017 Structure Function Principle
CLG835H Appendix

Distribution diagram of work light harness connector

P18E00162
8-92
Structure Function Principle January 24, 2017
Appendix CLG835H

XJ6、XJ0、XH3b

XK5b XJ8b

XJ2、XJ4

XJ5

XJ1、XJ3 XK4b

XK1b
P18E00163
 8-93
January 24, 2017 Structure Function Principle
CLG835H Appendix

The distribution diagram of cab harness connector

P18E00164
8-94
Structure Function Principle January 24, 2017
Appendix CLG835H

XZ5
XK6、
XK7
XM5 XS7
YS5、XU9 XM4
YS4
XZ9、XV5
XV6、XU8
XL7、XL9a
XZ2、XZ3

XV2、XV3 XS8a

XM1a
XL8a XN3 XN4
XL5 XL8b

XT8、XT9 X8、X9 X2、X3、X4、X7 XN7、XN8

X5a、X12a、X13a
XV4、XU6、XU5
XU3、XU4、XU7

XN6b
XL4 XP3
XM2a、XH5 XM9
XS2
XL2、XM3 XS3a、XS4a、
XL6
XS5a
XT4、XT6、X2b、X3b

XF1b
XE6
XN1

XM6、XM7 XE8 XK1a

XR2a XX7a、XX8a、
XX6a、XX9a
P18E00165
 8-95
January 24, 2017 Structure Function Principle
CLG835H Appendix

Distribution diagram of rear frame harness connector

P18E00166
8-96
Structure Function Principle January 24, 2017
Appendix CLG835H

XA11

XA26
XD6 XD5
XA1 XB2

XA23
XD7
XC6b

XB7

XA15
XE4
XA28
XA3、XA22
XB1
XE3

XD8
XA27 XA18
XB6
XX6b、XX7b XY3
XX8b、XX9b
XE7

XE9
XB8、XB9
XE8
XF1
XE6
P18E00167
 9-1
January 24, 2017 Appendix
CLG835H

Appendix
Schematic Diagram of Hydraulic System......................................................................9-3
Schematic Diagram of Brake System ............................................................................9-4
A/C System Schematic Diagram ....................................................................................9-5
Electrical Schematic Diagram ........................................................................................9-6
9-2
Appendix January 24, 2017
CLG835H
9-3
January 24, 2017 Schematic Diagram of Hydraulic System
CLG835H

Schematic Diagram of Hydraulic System

9-4
January 24, 2017 Schematic Diagram of Brake System
CLG835H

Schematic Diagram of Brake System

9-5
January 24, 2017 A/C System Schematic Diagram
CLG835H

A/C System Schematic Diagram

Control panel

Red Red
Blue/white Compressor relay Control panel relay
Air speed switch gear 3
Yellow
White White White Blower unit
Rheostat
Yellow Yellow Black

Blue/
white Blue/white

Black Black

Red/blue

Red/blue
White (gray)

White (gray)
gray

Black

gray
Black
Mode switch
Cooling Red/blue Red/blue

Venting
Heating lamp Earthing
Heating
Blue/yellow Blue/yellow Ignition signal

Blue/black Blue/black
Cooling adjust button

Cooling lamp

Outer circulation switch

Blue/yellow
Blue/black

Red/blue
White

Green
Black
White
White
Outer circulation lamp Green
Green Green

Black

Black

White
black
Blue/
yellow
Blue/

Red

Black

Blue
Compressor

Air vent fan Air vent fan Temperature

sensor Thermostat

Pressure switch Aluminum housing grounded

9-6
January 24, 2017 Electrical Schematic Diagram
CLG835H

Electrical Schematic Diagram

电喇叭
HORN

左前组合灯 FRONT COMBINATION LIGHT-LH

前左转向灯
FRONT LEFT TURN SIGNAL LIGHT
左前小灯
FRONT POSITION LIGHTLH
左远光灯
FRONT FLOODLIGHT HIGH BEAMLH

左近光灯
FRONT FLOODLIGHT LOW BEAMLH

右前组合灯 FRONT COMBINATION LIGHT-RH

前右转向灯
FRONT RIGHT TURN SIGNAL LIGHT
右前小灯
FRONT POSITION LIGHTRH
右远光灯
FRONT FLOODLIGHT HIGH BEAMRH

右近光灯
FRONT FLOODLIGHT LOW BEAMRH

右铲斗示廓灯(选装)
POSITION LIGHTRH(OPTIONAL)

左铲斗示廓灯(选装)
POSITION LIGHTLH(OPTIONAL)

接至驾驶室线束
TO CAB HARNESS
至第2页
TO PAGE 2

动臂限位开关
BOOM LIFT KICKOUT SW

铲斗限位开关
BUCKET POSITIONING SW

PK
S2
BU
DK
BR/GN
S1
集中润滑系统(选装) RD/BK
B+
CENTRALIZED LUBRICATION BR
GND
SYSTEM(OPTIONAL)

动臂减震电磁阀
RIDE CONTROL SOLENIOD

附加联A阀
ADDITIONAL A SOLENOID A

附加联B阀
ADDITIONAL B SOLENOID B
9-7
January 24, 2017 Electrical Schematic Diagram
CLG835H

GPS模块 GPS MODEL 散热控制器

仪表总成 INSTRUMENT AS
COOLING FAN CONTROLLER 应急转向开关 SECONDARY STEERING SW
J1
J2 变矩器油温信号(I) 钥匙开关电源 +24V KEY-ON +24V
J3 空空中冷(备用) 蓄电池电源 +24V BATTERY SUPPLY +24V
前雨刮电机
J4 GND5 壁灯 DOME LIGHT 地 GND
FRONT WIPER MOTOR
CAN_L 液压油温信号(I) SAE J1939 SHIELD
CAN_H 换向输出(O) SAE J1939(-)
电源(蓄电池) 自动反转信号(I) SAE J1939(+)
收放机 RADIO 音响系统 RADIO SYSTEM 集中润滑开关(选装) CENTR LUBRICATION SW(OPTIONAL)
GND 手动反转信号(I) 预热控制输出 PERHEATING CONTROL OUTPUT
GND6 仪表背光灯电源 +24V INSTRUMENT SUPPLY +24V
电源 水温(备用) IGNITION 电源1 计时信号 TIMER
比例输出(O) BATTERY 电源2 车速信号 VEHICHE SPEED
后雨刮电机(选装)
GROUND 地 转速信号 ENGINE SPEED
REAR WIPER MOTOR(OPTIONAL) (灰)
发电机D+ RS232/RXD
KEY-ON 发动机水温传感器 ENGINE COOLANT TEMP
GND1 风扇手动反转开关 FAN MMODE SW 变矩器油温传感器 TORQUE CONVERTER OIL TEMP
SPEAKER-RH 右扬声器(+)
BATTERY SPEAKER-RH 右扬声器(-) 气压传感器 BRAKE AIR PRESSURE
120Ω1W
总线网络端电阻 CAN_L 燃油油位传感器 FUEL LEVEL SENSOR
SPEAKER-LH 左扬声器(+)
CAN-BUS TERMINATION RESISTOR CAN_H SPEAKER-LH 左扬声器(-) 环境温度 AMBIENT TEMP
除霜装置(选装) GND2 液晶屏切换开关 MONITOR SHIFT SW
DEFROSTER(OPTIONAL) GND3 发动机空滤堵塞指示 INTAKE AIR FILTER IND
TXD 变速箱故障报警灯 TRANS. FAILURE IND
喇叭开关(方向机柱) HORN SW(ON STEERING COLUMN) 左扬声器
RXD SPEAKER-LH 变速油压压力开关 TRANS OIL PRESSURE SW
第三联锁止开关 THIRD SOLENOID LOCKOUT SW 预热输入 PERHEATING INPUT
地 串口GND
30A电源 加热器运行指示 HEATER RUNNING IND
发动机运行信号 SF_MODE 右扬声器 制动低压报警灯 BRAKE OIL PRESSURE IND
压缩机离合器 (黑) SPEAKER-RH 停车制动指示 PARKING BRAKE IND
空调控制单元 等待起动指示灯 WAIT TO START IND
组合开关手柄 COMBINATION SW LEVER
A/C CONTROLLER 停机指示灯 STOP IND 接至后车架线束
电磁水阀 警告指示灯 WARNNING IND TO REAR FRAME HARNESS
指示灯模块 INDIC AS 发动机机油压力开关 ENGINE OIL PRESSURE SW
电磁水阀 至第3页
自动/手动模式选择开关 A/M SHIFT MODE SW 发电机充电指示 ALTERNATOR CHARGE IND TO PAGE 3
钥匙开关电源 +24V KEY-ON +24V
动力切断指示 TRANS CLUTCH CUT-OFF IND
地 GND
前大灯远光指示 HIGH BEAM IND
制动灯开关 地 GND
右转向指示 RIGHT TURN IND
BRAKE LIGHT PSW SAE J1939 SHIELD 左转向指示 LEFT TURN IND
LG通讯口 SAE J1939(+)
LG COMMUNICATION SAE J1939(-)
动臂减震输出 PAYLOAD OUTPUT
120Ω1W 总线网络端电阻
行车制动动力切断开关 CAN-BUS TERMINATION RES.
SERVICE BRAKE CLUTCH CUTOFF PSW

电锁 START SW
后窗喷水开关(选装) REAR WASHER SW(OPTIONAL)
应急转向输出控制 SECONDARY STEERING CONTROL
转向系统故障开关 STEERING FAILURE SW
液压油污开关 HYDRAULIC OIL FILTER SW

安全带指示 SAFE BELT IND

停车制动开关 PARKING BRAKE SW 润滑系统运行指示 LUBRICATION RUNNING IND 后雨刮开关(选装) REAR WIPER SW(OPTIONAL)
润滑系统故障指示 LUBRICATION FAILURE IND
液压油温开关 HYDRAULIC OIL TEMP SW
尿素液位低指示灯 DEF LOW IND 接至后车架线束
点烟器 LIGHTER
TO REAR FRAME HARNESS
动臂浮动电磁阀 至第3页
BOOM FLOAT SOLENOID TO PAGE 3
动臂减震指示 RIDE CONTROL IND
动臂限位电磁阀 应急转向运行开关 SECONDARY STEERING SW 前工作灯开关 FRONT WORK LIGHT SW
BUCKET POSITIONER
铲斗限位电磁阀 座椅电源(选装)
电子油门踏板 LIFT KICKOUT SOLENOID SEAT(OPTIONAL) 12V电源插座(选装)
ACCELERATOR PEDAL
12V SUPPLY SOCKET(OPTIONAL)
除霜开关(选装) DEFROSTER SW(OPTIONAL)
APS1 FNR手柄 FNR HAND LEVER
安全带开关 SAFETY BELT SW

POWER 后退监视/称重系统(选装) 后工作灯开关 REAR WORK LIGHT SW

COM4 REARVIEW/WEIGHING SYSTEM(OPTIONAL)
SIGNAL1
RESERVED SIGNAL2
IVS2 HORN
冷却液加热开关(选装) HYDRONIC HEATER SW(OPTIONAL)
IVS1 COM3 动臂减震开关(选装) RIDE CONTROL SW(OPTIONAL)
接驾驶室地
F TO GROUND
N 小灯及大灯开关 POSITION LIGHT AND FLOODLIGHT SW
电液比例控制器
R ELECTRONIC PROPORTIONAL CONTROLLER 接至后车架线束
COM2 TO REAR FRAME HARNESS
GND RXD 至第3页
GND TXD TO PAGE 3
九针数据诊断口 KD
GND CAN_H 液晶屏切换开关 DISPLAY SHIFT SW
DIAGNOSTIC CONNETOR COM1
BATTERY +24V CAN_L
BATTERY +24V
IGNITION 快换手柄1(I) GND
GND1 快换手柄2(I) RS232_GND
DC-DC转换器(选装)
GND2 收斗缓冲感应开关 GND
DC-DC CONVERTER(OPTIONAL)
OUTPUT GND GND
铲斗角度信号（备用） GND 后视镜除霜开关(选装) R-MIRROR DEFROSTER SW(OPTIONAL)
GND3 GND 驻车灯开关 HAZARD FLASHER SW
+5V电源输出 附加联1阀（O）
GND 附加联2阀（O）
GND 收斗缓冲溢流阀
CAN_SHIELD
KEY_ON
接驾驶室地
TO GROUND
接驾驶室地 接至后车架线束
旋转信号灯开关(选装) ROTATING BEACON SW(OPTIONAL)
TO GROUND TO REAR FRAME HARNESS
至第3页
TO PAGE 3

动力切断选择开关 CLUTCH ON/OFF SW

接驾驶室地
TO GROUND

4WG 158全自动箱变速操纵系统
4WG 158 TRANS. SHIFT CONTROL SYSTEM
FNR控制器
FNR CONTROLLER

ZF-KD
FNR-KD ZF-F
FNR-R ZF-N
+24V ZF-R 接至前车架线束
GND CAN_H
TO FRONT FRAME HARNESS
SFMO_DE R
CAN_L N 至第1页
TO PAGE 1
串口GND F
TXD KD
RXD ZF-B3
FNR-N ZF-B2
FNR-F ZF-B1

（黑） （灰）

SD1
AS
RF
KD
ED9 SPARE CONNECTOR TO GEAR
换档手柄
AD9 GEAR SELECTOR SELECTOR WHEN FNR
FUNCTION IS UNABLE.
KD FNR功能失效时备用插接头
(+)1 B1
接至顶灯线束
(+)2
AD7 接至电器集中控制盒线束 TO VEC HARNESS 接至电器集中控制盒线束 TO VEC HARNESS TO DOME LIGHT HARNESS
接至电器集中控制盒线束 TO VEC HARNESS
至第4页 TO PAGE 4 至第4页 TO PAGE 4
AD8 B2 至第4页 TO PAGE 4 至第5页
(-)1 B3 TO PAGE 5
(-)2

N
ED3 R
B3 FS F
S5 (+)VP
ED4

接至ZF线束
TO ZF HARNESS

SD1

(-)
(+)
9-8
January 24, 2017 Electrical Schematic Diagram
CLG835H

发动机电控模块 ENGINE ECM

电锁信号（+）（KEYSWITCH（DCU）HS）
电锁信号（-）KEYSWITCH（DCU) LS）
DCU供电继电器（+）DCU POWER RELAY(+)
发动机燃油泵继电器 ENGINE FUEL LIFT PUMP RELAY 尾气处理控制单元 TENNECO XNOX DCU
辅助起动加热塞继电器 GLOW PLUGS START AID RELAY
左后组合灯 REAR COMBINATION LIGHT-LH ACU供电+ ACU SUPPLY B+
3.75A 开/关电源地 3.75A ON/OFF SOURCING RETURN
ACU供电+ ACU SUPPLY B+
风扇比例电磁阀 左后小灯 2A PWM 源地
ACU供电+ ACU SUPPLY B+
COOLING FAN PROPORTION SOLENIOD REAR POSITION LIGHT-LH 等待起动灯 WAIT TO START LAMP
电锁 IGNITION
CAN C+ （与NOX等传感器通讯）
左制动灯 ACU供电- ACU SUPPLY B-
BRAKE LIGHT-LH CAN C-
ACU供电- ACU SUPPLY B-
风扇换向电磁阀 CAN C SHIELD
左倒车信号灯 ACU供电- ACU SUPPLY B-
COOLING FAN REVERSE SOLENIOD BACKUP LIGHT-LH PDL+
选择性催化还原反应前（PRE-SCR）温度
PDL-
后左转向灯 PRE DOC 温度
机油压力指示灯 （OIL PRESSURE LAMP）可以装，也可以通过CAN传输
REAR LEFT TURN SIGNAL LIGHT PRE DEF 温度
等待关断指示灯 WAIT TO DISCONNECT INDICATOR
右后组合灯 REAR COMBINATION LIGHT-RH CAN A+ 应用数据连接(诊断） PH 喷射阀+
CAC温传感器
CAC TEMPERATURE SENSOR CAN A- PH 喷射阀-
右后小灯
CAN A SHIELD DRVP2
REAR POSITION LIGHT-RH
被动模拟量返回 PASSIVE ANALOGUE RETURN 尿素加热管1（抽液）
右制动灯 DRVP3
主动模拟量返回 ACTIVE ANALOGUE RETURN
BRAKE LIGHT-RH
变矩器油温传感器(散热控制用) 发动机报警灯 WARNING/DERATE LAMP 尿素加热管2（传输）
TORQUE CONVERTER OIL TEMPERATURE 右倒车信号灯 关断/停止指示灯 SHUTDOWN/STOP LAMP DRVP4
BACKUP LIGHT-RH
SENSOR(FOR COOLING FAN CONTROLLER) 进气温度传感器 INLET AIR TEMP SENSOR 尿素加热管3（返回）
后右转向灯 STG 反馈 STG RETURN 冷却液分流阀控制(起加热功能）
REAR RIGHT TURN SIGNAL LIGHT 尿素液位低指示灯 LOW DEF LEVEL INDICATOR CAN A+
排放系统维修指示灯 EMISSIONS MAL INDICATOR CAN A-
液压油温报警开关 2A 开/关 电源返回 2A ON/OFF SOURCING RETURN CAN C+
HYDRAULIC TEMPERATURE PSW CAN C-
8v 供电 PWM温度传感器/PWM 油门 PWM TEMP SENSOR，PWM THROTTLE
牌照灯 LICENCE LIGHT
增压涡轮输出处氮氧化合物传感器开/关 NOX EO ON/OFF XDRG (0V)
冷却水位开关 COOLANT LEVEL SWITCH
电磁水阀 脉宽调制/数字传感器地 PWM/DIGITAL SENSOR RETURN
SOLEOID WATER VALVE 倒车报警器 尾管输出氮氧化合物开/关 NOX TO ON.OFF
BACKUP ALARM 电锁信号 IGNITION KEY STWICH
后处理系统 ID1 -DPF/SCR (OR DPF ONLY)
5V模拟电源 5V ANALOGUE POWER
变矩器油温传感器(仪表用)
再生就绪 REGEN READENESS
TORQUE CONVERTER OIL TEMPERATURE
怠速有效1/顾客风扇优先 REGEN VALIDATION 1/CUSTOMER FAN OVERRIDE
SENSOR(FOR INSTRUMENT) 前窗水洗马达 燃油含水开关 WATER IN FUEL SWITCH
FRONT WINDOW WASHER MOTOR
模式开关2/空滤堵塞开关 MODE SWITCH 2/INLET AIR RESTRICTION SWITCH
模拟油门1/脉宽调制油门1 ANALOGUE THROTTLE 1/PWM THROTTLE 1
BAT-
接至驾驶室线束 变速油压报警开关
BAT- XRDG (0V)
TO CAB HARNESS TRANSMISSION OIL PRESSURE ALERT PSW 后窗水洗马达 SCR 进气温度传感器
BAT-
REAR WINDOW WASHER MOTOR SCR INLET TEMP SCR INLET TEMP SENSOR
TO CAB HARNESS BAT+
至第2页 BAT+
TO PAGE 2 BAT+
燃油油位传感器 XRDG (0V) DOC 进气温度传感器
空调压缩机离合器
FUEL LEVEL SENSOR DOC INLET TEMP DOC INLET TEMP SENSOR
A/C COMPRESSOR CLUTCH

停车制动动力切断开关 REGULATED BAT+

PARKING BRAKE CLUTCH CUTOFF PSW 120Ω 1W 总线网络C端电阻 CAN C+ AMMONIA SENSOR
CAN C- 氨气传感器
空滤堵塞报警开关
BAT-
INTAKE AIR FILTER ALERT SW

停车制动低压报警开关
PARKING BRAKE LOW PRESSURE ALERT PSW 120Ω 1W 总线网络C端电阻 ECM CONTR BAT+

涡轮增压输出处氮氧化合物传感器
GROUND TURBO OUT NOx SENSOR
行车制动低压报警开关 CAN C-
SERVICE BRAKE LOW PRESSURE ALERT PSW 120Ω 1W 总线网络A端电阻 CAN C+

ECM CONTR BAT+

停车制动控制开关
PARKING BRAKE CONTROL PSW 尾管输出处氮氧化合物传感器
LIFT PUMP BAT- 燃油提升泵
LIFT PUMP BAT+ FUEL LIFT PUMP TAILPIPE OUT NOx SENSOR
GROUND
CAN C-
接至驾驶室线束 停车制动电磁阀 CAN C+
TO CAB HARNESS PARKING BRAKE SOLENOID SIGNAL 燃油含水开关
至第2页 GND WATER_IN_FUEL SW
TO PAGE 2
VS +8V
5V
二极管DIODE
后处理识别模块
SIGNAL AFTER TREATMENT ID MODUL

GROUND

AIR INLET TEMP 环境空气温度传感器

0V AIR INLET TEMP SENSOR VALVE HS 冷却液分流阀
COOLANT DIVERTER VALVE
接至驾驶室线束 VALVE LS
TO CAB HARNESS
至第2页 起动接触器
TO PAGE 2 START RELAY LINE HEATER1 HS 加热管路1
LINE HEATER1 LS HOSEHEATING 1

等待关断指示灯
LINE HEATER2 HS 加热管路 2
WAIT TO DISCONNECT INDICATOR
LINE HEATER2 LS HOSEHEATING 2
应急转向运行指示开关
SECONDARY STEERING RUNNING
加热塞
INDICATOR PSW LINE HEATER3 HS 加热管路 3
GLOW PLUG
起动电机 LINE HEATER3 LS HOSEHEATING 3
START MOTOR
转向系统低压报警开关
STEERING SYSTEM LOW INJECTOR HS DEF 流体喷射器
PRESSURE ALERT PSW INJECTOR LS DEF FLUID INJECTOR

CAN C-
CAN C+ 尿素罐顶部单元
GROUND TANK HEADER UNIT
+12V DC +12V DC
REGULATED BAT+

接至驾驶室线束 蓄电池组 BATTERY GP

TO CAB HARNESS 应急转向电机
至第2页
SECONDARY STEERING MOTOR
TO PAGE 2

负极开关 DISCONNECT SW

发电机 ALTERNATOR

应急转向系统(选装) SECONDARY STEERING SYSTEM(OPTIONAL)

ECM保险30A
ECM FUSE 30A
接负极地
TO GROUND
发电机保险80A
ALTERNATOR FUSE 80A
主电源保险60A
MAIN SUPPLY FUSE 60A
接后车架地 主电源保险60A 加热塞保险30A
TO GROUND MAIN SUPPLY FUSE 60A GLOW PLUG FUSE 30A
发电机保险80A
电器集中控制盒保险50A ALTERNATOR FUSE 80A
CONTROLLER FUSE 50A 电器集中控制盒保险50A
CONTROLLER FUSE 50A
空调保险30A 空调保险30A
接后车架地 A/C FUSE 30A A/C FUSE 30A
TO GROUND
ECM保险30A
发动机后处理DCU保险30A ECM FUSE 30A
DCU FUSE 30A 发动机后处理DCU保险30A
DCU FUSE 30A

加热塞保险30A
GLOW PLUG FUSE 30A

保险组 FUSE GP
9-9
January 24, 2017 Electrical Schematic Diagram
CLG835H

非过电锁电源总线 UNSWITCHED BUS

电锁 KEY START SW 7.5A

ECM电源 ECM UNSWITCHED PWR 7.5A

二极管 D3
DIODE D3
闪光器/小灯 FLASHER/POSITION LAMP 7.5A
闪光继电器
FLASHER

B 二极管 D2
辅助功能1 AUX. FUNC.1 10A DIODE D2
L
接至驾驶室线束
E TO CAB HARNESS
二极管 D1 至第2页
制动灯 STOP LAMP 7.5A 电喇叭继电器
DIODE D1 TO PAGE 2
HORN RELAY

电喇叭/倒车报警 HORN/BACK-UP ALARM 10A D继电器

86
D RELAY
87A
87
燃油提升泵 FUEL LIFT PUMP 7.5A DCU 电源继电器
30 86
DCU MAIN POWER RELAY
85 87A
87
制动灯继电器
86 30
BRAKE LIGHT RELAY
87A 85
87
86 30
87A 85
87
过电锁电源 SWITCHED BUS
30 前雨刮2档继电器
85 2ND POSITION FRONT WIPER RELAY
收放机/点烟器 RADIO/LIGHTER 10A
风扇换向阀继电器
COOLING FAN REVERSE SOLENIOD RELAY 86
辅助功能4 AUX. FUNC.2 7.5A 87A
87 起动保护继电器
86
30 START PROTECTION RELAY
87A
85
87
应急转向系统 SECONDARY STEERING SYSTEM 10A
30 前雨刮1档继电器 86
85 IST POSITION FRONT WIPER RELAY 87A
87
ECM电源 ECM SWITCHED PWR 10A 除霜装置继电器
DEFROSTER RELAY 86 30

87A 85

87 空档起动联锁继电器
86
仪表 INSTRUMENT 7.5A 30 NEUTRAL START INTERLOCK RELAY
87A
85
87
30 前窗喷水继电器 86
辅助功能2 AUX. FUNC.2 10A
85 FRONT WASHER RELAY 87A
87
应急转向继电器
辅助功能3 AUX. FUNC.3 7.5A SECONDARY STEERING RELAY 86 30

87A 85

87
大灯 FRONT FLOODLAMP 10A 86
30
87A 燃油提升泵供电控制继电器
85
87 FUEL LIFT PUMP SUPPLY CONTROL RELAY 接至驾驶室线束
后工作灯 REAR WORK LAMP 10A 30 自动动臂减震继电器 TO CAB HARNESS
85 AUTOMATIC RIDE CONTROL RELAY 至第2页
86
TO PAGE 2
除霜装置 DEFROSTER 20A 87A
86 87
DC-DC 10A 87A 30
87 85
座椅 SEAT 15A 30
85 加热塞继电器
雨刮系统 WIPER SYSTEM 20A GLOW PLUG RELAY
倒车报警继电器
BACK UP ALARM RELAY
前工作灯 FRONT WORK LAMP 15A
86

86 87A

87A 87

87 30

30 85

左制动灯 BRAKE LAMP LH 5A 85

动臂限位继电器
G继电器 BOOM LIFT KICKOUT RELAY
右制动灯 BRAKE LAMP RH 5A
G RELAY

86
86 87A
左小灯 POSITION LAMP LH 5A 87A 87
87 30
右小灯 POSITION LAMP RH 5A 30 85
85

铲斗限位继电器
BUCKET POSITIONER RELAY 接至驾驶室线束 至第2页
TO CAB HARNESS TO PAGE 2

86
电源接触器
87A
POWER RELAY
87
30
85

发动机再生就绪继电器
REGEN READINESS RELAY

86
87A
87
30
85
9-10
January 24, 2017 Electrical Schematic Diagram
CLG835H

左前工作灯一
FRONT WORK LIGHTLH

右前工作灯一
FRONT WORK LIGHTRH

左前工作灯二 (选装)
FRONT WORK LIGHTLH(OPTIONAL)

右前工作灯二 (选装)
FRONT WORK LIGHTRH(OPTIONAL)

左后工作灯一
REAR WORK LIGHTLH

右后工作灯一 接至驾驶室线束
REAR WORK LIGHTRH TO CAB HARNESS
至第2页
TO PAGE 2

左后视镜除霜装置(选装)
REARVIEW MIRROR
DEFROSTERLH(OPTIONAL)

右后视镜除霜装置(选装)
REARVIEW MIRROR
DEFROSTERRH(OPTIONAL)

旋转信号灯(选装)
ROTATING BEACON(OPTIONAL)

安全带信号灯(选装)
SAFE BELT BEACON(OPTIONAL)

环境温度传感器
ENVIR TEMP SENSOR