CONTENTS

SECTION 1 GENERAL

Group 1 Safety Hints ---------------------------------------------------------------------------------------------------- 1-1

Group 2 Specifications ------------------------------------------------------------------------------------------------- 1-9

SECTION 2 STRUCTURE AND FUNCTION

Group 1 Pump Device -------------------------------------------------------------------------------------------------- 2-1

Group 2 Main Control Valve ----------------------------------------------------------------------------------------- 2-9
Group 3 Swing Device ------------------------------------------------------------------------------------------------- 2-31
Group 4 Travel Device -------------------------------------------------------------------------------------------------- 2-41
Group 5 RCV Lever ------------------------------------------------------------------------------------------------------ 2-50

SECTION 3 HYDRAULIC SYSTEM

Group 1 Hydraulic Circuit --------------------------------------------------------------------------------------------- 3-1

Group 2 Main Circuit ----------------------------------------------------------------------------------------------------- 3-2
Group 3 Pilot Circuit ------------------------------------------------------------------------------------------------------ 3-5
Group 4 Single Operation -------------------------------------------------------------------------------------------- 3-10
Group 5 Combined Operation ------------------------------------------------------------------------------------- 3-25

SECTION 4 ELECTRICAL SYSTEM

Group 1 Component Location ------------------------------------------------------------------------------------- 4-1

Group 2 Monitoring system ------------------------------------------------------------------------------------------ 4-3
Group 3 Electrical Circuit ---------------------------------------------------------------------------------------------- 4-63
Group 4 Electrical Component Specification ------------------------------------------------------------- 4-80
Group 5 Connectors ----------------------------------------------------------------------------------------------------- 4-87
Group 6 Fault codes ----------------------------------------------------------------------------------------------------- 4-104

SECTION 5 TROUBLESHOOTING

Group 1 Before Troubleshooting ---------------------------------------------------------------------------------- 5-1

Group 2 Hydraulic and Mechanical System --------------------------------------------------------------- 5-4
Group 3 Electrical System ------------------------------------------------------------------------------------------- 5-24
SECTION 6 MAINTENANCE STANDARD

Group 1 Operational Performance Test ----------------------------------------------------------------------- 6-1

Group 2 Major Components ---------------------------------------------------------------------------------------- 6-21
Group 3 Track and Work Equipment ---------------------------------------------------------------------------- 6-30

SECTION 7 DISASSEMBLY AND ASSEMBLY

Group 1 Precaution ------------------------------------------------------------------------------------------------------ 7-1

Group 2 Tightening Torque ------------------------------------------------------------------------------------------ 7-4
Group 3 Pump Device -------------------------------------------------------------------------------------------------- 7-7
Group 4 Main Control Valve ----------------------------------------------------------------------------------------- 7-38
Group 5 Swing Device -------------------------------------------------------------------------------------------------- 7-51
Group 6 Travel Device -------------------------------------------------------------------------------------------------- 7-72
Group 7 RCV Lever ------------------------------------------------------------------------------------------------------ 7-100
Group 8 Turning Joint ---------------------------------------------------------------------------------------------------
7-114
Group 9 Boom, Arm and Bucket Cylinder ------------------------------------------------------------------ 7-119
Group 10 Undercarriage ------------------------------------------------------------------------------------------------ 7-138
Group 11 Work Equipment -------------------------------------------------------------------------------------------- 7-150

SECTION 8 COMPONENT MOUNTING TORQUE

Group 1 Introduction Guide ------------------------------------------------------------------------------------------ 8-1

Group 2 Engine System ----------------------------------------------------------------------------------------------- 8-2
Group 3 Electric System ---------------------------------------------------------------------------------------------- 8-4
Group 4 Hydraulic System ------------------------------------------------------------------------------------------- 8-5
Group 5 Undercarriage ------------------------------------------------------------------------------------------------ 8-7
Group 6 Structure --------------------------------------------------------------------------------------------------------- 8-8
Group 7 Work Equipment -------------------------------------------------------------------------------------------- 8-10
 SECTION 1 GENERAL

Group 1 Safety Hints ---------------------------------------------------------------------------------------------------- 1-1

Group 2 Specifications ------------------------------------------------------------------------------------------------- 1-9
 SECTION 1 GENERAL
GROUP 1 SAFETY

FOLLOW SAFE PROCEDURE

Unsafe wor k practices are dangerous.
Understand service procedure before doing
work; Do not attempt shortcuts.

WEAR PROTECTIVE CLOTHING

Wear close fitting clothing and safety equipment
appropriate to the job.

13031GE01

WARN OTHERS OF SERVICE WORK

Unexpected machine movement can cause
serious injury.
Before performing any work on the excavator,
attach a 「DoDo Not Operate
Operate」 tag on the right
side control lever.

13031GE02

USE HANDHOLDS AND STEPS

Falling is one of the major causes of personal
injury.
When you get on and off the machine, always
maintain a three point contact with the steps
and handrails and face the machine. Do not
use any controls as handholds.
Never jump on or off the machine. Never mount
or dismount a moving machine.
Be careful of slippery conditions on platforms, 13031GE03

steps, and handrails when leaving the machine.

1-1
PREPARE FOR EMERGENCIES
Be prepared if a fire starts.
Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for doctors,
ambulance ser vice, hospital, and fire
department near your telephone.

13031GE04

PROTECT AGAINST FLYING DEBRIS

Guard against injury from flying pieces of metal
or debris; Wear goggles or safety glasses.

13031GE05

PROTECT AGAINST NOISE

Prolonged exposure to loud noise can cause
impairment or loss of hearing.
Wear a suitable hearing protective device such
as earmuffs or earplugs to protect against
objectionable or uncomfortable loud noises.

13031GE06

AVOID POWER LINES

Serious injury or death can result from contact
with electric lines.
Never move any part of the machine or load
closer to electric line than 3m(10ft) plus twice the
line insulator length.

13031GE07

1-2
KEEP RIDERS OFF EXCAVATOR
Only allow the operator on the excavator. Keep
riders off.
Riders on excavator are subject to injury such
as being struck by foreign objects and being
thrown off the excavator. Riders also obstruct
the operator's view resulting in the excavator
being operated in an unsafe manner.
13031GE08

MOVE AND OPERATE MACHINE SAFELY

Bystanders can be run over. Know the location
of bystanders before moving, swinging, or
operating the machine.
Always keep the travel alarm in working
condition. It warns people when the excavator
starts to move.
Use a signal person when moving, swinging, or
operating the machine in congested areas. 13031GE09

Coordinate hand signals before starting the

excavator.

OPERATE ONLY FORM OPERATOR'S SEAT

Avoid possible injury machine damage. Do not
star t engine by shor ting across star ter
terminals.
NEVER start engine while standing on ground.
Start engine only from operator's seat.

13031GE26

PARK MACHINE SAFELY

Before working on the machine:
·Park machine on a level surface.
·Lower bucket to the ground.
·Turn auto idle switch off.
·Run engine at 1/2 speed without load for 2
minutes.
·Turn key switch to OFF to stop engine.
Remove key from switch.
·Move pilot control shutoff lever to locked position.
·Allow engine to cool.

1-3
SUPPORT MACHINE PROPERLY
Always lower the attachment or implement to the
ground before you work on the machine. If you
must work on a lifted machine or attachment,
securely support the machine or attachment.
Do not support the machine on cinder blocks,
hollow tiles, or props that may crumble under
continuous load.
Do not work under a machine that is supported
13031GE10
solely by a jack. Follow recommended
procedures in this manual.

SERVICE COOLING SYSTEM SAFELY

Explosive release of fluids from pressurized
cooling system can cause serious burns.
Shut off engine. Only remove filler cap when
cool enough to touch with bare hands.

13031GE11

HANDLE FLUIDS SAFELY-AVOID FIRES

Handle fuel with care; It is highly flammable.
Do not refuel the machine while smoking or
when near open flame or sparks. Always stop
engine before refueling machine.
Fill fuel tank outdoors.

13031GE12

Store flammable fluids away from fire hazards.

Do not incinerate or puncture pressurized
containers.
Make sure machine is clean of trash, grease,
and debris.
Do not store oily rags; They can ignite and burn
spontaneously.

13031GE13

1-4
BEWARE OF EXHAUST FUMES
Prevent asphyxiation. Engine exhaust fumes
can cause sickness or death.
If you must operate in a building, be positive
there is adequate ventilation. Either use an
exhaust pipe extension to remove the exhaust
fumes or open doors and windows to bring
enough outside air into the area.

REMOVE PAINT BEFORE WELDING OR

HEATING
Avoid potentially toxic fumes and dust.
Hazardous fumes can be generated when paint
is heated by welding, soldering, or using a torch.
Do all work outside or in a well ventilated area.
Dispose of paint and solvent properly.
Remove paint before welding or heating:
· If you sand or grind paint, avoid breathing the dust.
Wear an approved respirator.
· If you use solvent or paint stripper, remove
stripper with soap and water before welding.
Remove solvent or paint stripper containers
13031GE14
and other flammable material from area.
Allow fumes to disperse at least 15 minutes
before welding or heating.

ILLUMINATE WORK AREA SAFELY

Illuminate your work area adequately but safely.
Use a portable safety light for working inside or
under the machine. Make sure the bulb is
enclosed by a wire cage. The hot filament of an
accidentally broken bulb can ignite spilled fuel
or oil.

13031GE15

1-5
SERVICE MACHINE SAFELY
Tie long hair behind your head. Do not wear a
necktie, scarf, loose clothing or necklace when
you work near machine tools or moving parts.
If these items were to get caught, severe injury
could result.
Remove rings and other jewelry to prevent
electrical shorts and entanglement in moving
parts.
13031GE16

STAY CLEAR OF MOVING PARTS

Entanglements in moving parts can cause
serious injury.
To prevent accidents, use care when working
around rotating parts.

13031GE17

AVOID HIGH PRESSURE FLUIDS

Escaping fluid under pressure can penetrate the
skin causing serious injury.
Avoid the hazard by relieving pressure before
disconnecting hydraulic or other lines. Tighten
all connections before applying pressure.
Search for leaks with a piece of cardboard.
Protect hands and body from high pressure
fluids. 13031GE18

If an accident occurs, see a doctor immediately.

Any fluid injected into the skin must be
surgically removed within a few hours or
gangrene may result.

13031GE19

1-6
AVOID HEATING NEAR PRESSURIZED
FLUID LINES
Flammable spray can be generated by heating
near pressurized fluid lines, resulting in severe
burns to yourself and bystanders. Do not heat
by welding, soldering, or using a torch near
pressurized fluid lines or other flammable
materials.
Pressurized lines can be accidentally cut when
13031GE20
heat goes beyond the immediate flame area.
Install fire resisting guards to protect hoses or
other materials.

PREVENT BATTERY EXPLOSIONS

Keep sparks, lighted matches, and flame away
from the top of battery. Battery gas can
explode.
Never check battery charge by placing a metal
object across the posts. Use a volt-meter or
hydrometer.
Do not charge a frozen battery; It may explode.
Warm battery to 16˚C (60˚F). 13031GE21

PREVENT ACID BURNS

Sulfuric acid in battery electrolyte is poisonous. It
is strong enough to burn skin, eat holes in
clothing, and cause blindness if splashed into
eyes.
Avoid the hazard by:
1. Filling batteries in a well-ventilated area.
2. Wearing eye protection and rubber gloves.
3. Avoiding breathing fumes when electrolyte
is added.
4. Avoiding spilling of dripping electrolyte.
5. Use proper jump start procedure.
If you spill acid on yourself:
1. Flush your skin with water.
2. Apply baking soda or lime to help neutralize
the acid.
3. Flush your eyes with water for 10-15
minutes. Get medical attention immediately.
If acid is swallowed:
1. Drink large amounts of water or milk.
13031GE22
2. Then drink milk of magnesia, beaten eggs,
or vegetable oil.
3. Get medical attention immediately.

1-7
USE TOOLS PROPERLY
Use tools appropriate to the work. Makeshift
tools, parts, and procedures can create safety
hazards.
Use power tools only to loosen threaded tools
and fasteners.
For loosening and tightening hardware, use the
c o r r e c t s i ze t o o l s. D O N OT u s e U. S.
measurement tools on metric fasteners. Avoid
bodily injury caused by slipping wrenches.
13031GE23
Use only recommended replacement parts.(aee
Parts catalogue.)

DISPOSE OF FLUIDS PROPERLY

Improperly disposing of fluids can harm the
environment and ecology. Before draining any
fluids, find out the proper way to dispose of
waste from your local environmental agency.
Use proper containers when draining fluids. Do
not use food or beverage containers that may
mislead someone into drinking from them.
DO NOT pour oil into the ground, down a drain,
or into a stream, pond, or lake. Observe
13031GE24
relevant environmental protection regulations
when disposing of oil, fuel, coolant, brake fluid,
filters, batteries, and other harmful waste.

REPLACE SAFETY SIGNS

Replace missing or damaged safety signs. See
the machine operator's manual for correct
safety sign placement.

13031GE25

LIVE WITH SAFETY

Before returning machine to customer, make
sure machine is functioning properly, especially
the safety systems. Install all guards and
shields.

1-8
 GROUP 2 SPECIFICATIONS

1. MAJOR COMPONENT

Tool box Swing motor Fuel tank Hydraulic tank

Oil cooler

Radiator

Engine

Main pump

Tooth Bucket Main control valve Turning joint

Arm cylinder Boom Boom cylinder Swing post Cab Muffler

Arm Side cutter Track Sprocket Counterweight

Control link Idler Track roller Carrier roller Travel motor

Bucket cylinder Control rod Dozer blade

559A2SP01

1-9
2. SPECIFICATIONS
1) 3.0 m ( 9' 10") MONO BOOM, 1.6 m ( 5' 3") ARM, WITH BOOM SWING SYSTEM

I(I') D

E
C

H
P
F
O
J

Q
N
K M
A B(L)
559A2SP02

Description Unit Specification

Operating weight kg (lb) 5650 (12460)
Bucket capacity (SAE heaped), standard m3 (yd3) 0.18 (0.24)
Overall length A 5900 (19' 4")
Overall width, with 380 mm shoe B 1920 (6' 4")
Overall height C 2550 (8' 4")
Superstructure width D 1850 (6' 1")
Overall height of cab E 2550 (8' 4")
Ground clearance of counterweight F 690 (2' 3")
Engine cover height G 1690 (5' 7")
Minimum ground clearance H 380 (1' 3")
Rear-end distance I 1650 (5' 5")
mm (ft-in)
Rear-end swing radius I' 1650 (5' 5")
Distance between tumblers J 1990 (6' 6")
Undercarriage length K 2530 (8' 4")
Undercarriage width L 1880 (6' 2")
Track gauge M 1500 (4' 11")
Track shoe width, standard N 380 (15")
Height of blade O 350 (1' 2")
Ground clearance of blade up P 390 (1' 3")
Depth of blade down Q 590 (1' 11")
Travel speed (low/high) km/hr (mph) 2.2/4.2 (1.4/2.6)
Swing speed rpm 9.1
Gradeability Degree (%) 35 (70)
Ground pressure (380 mm shoe) kgf/cm2(psi) 0.34 (4.83)
Max traction force kg (lb) 5300 (11680)

1-10
3. WORKING RANGE
1) 3.0 m (9' 10") MONO BOOM WITH BOOM SWING SYSTEM

A
A'
F

D
E
C
B'
B

8ft 559A2SP03

Description 1.6 m (5' 3") Arm

Max digging reach A 6150 mm (20' 2")

Max digging reach on ground A' 6010 mm (19' 9")
Max digging depth B 3820 mm (12' 6")
Max digging depth (8ft level) B' 3420 mm (11' 3")
Max vertical wall digging depth C 3200 mm (10' 6")
Max digging height D 5780 mm (19' 0")
Max dumping height E 4050 mm (13' 3")
Min swing radius F 2350 mm ( 7' 9")
Boom swing radius (left/right) 80˚/50˚
37.7 kN
SAE 3850 kgf
8490 lbf
Bucket digging force
42.4 kN
ISO 4330 kgf
9550 lbf
28.4 kN
SAE 2900 kgf
6390 lbf
Arm crowd force
31.9 kN
ISO 3260 kgf
7190 lbf

1-11
4. WEIGHT

Item kg lb
Upperstructure assembly 2710 5970
Main frame weld assembly 600 1320
Engine assembly 270 595
Main pump assembly 30 70
Main control valve assembly 45 100
Swing motor assembly 75 165
Hydraulic oil tank assembly 90 200
Fuel tank assembly 60 130
Boom swing post 110 240
Counterweight 235 520
Cab assembly 350 770
Lower chassis assembly 2150 4740
Track frame weld assembly 700 1540
Swing bearing 90 200
Travel motor assembly 80 180
Turning joint 30 70
Track recoil spring 20 45
Idler & tension body 60 130
Carrier roller 12 26
Track roller 12 26
Sprocket 20 40
Track-chain assembly (380 mm standard triple grouser shoe) 320 710
Dozer blade assembly 210 460
Front attachment assembly (3.0 m boom,1.6 m arm, 0.18 m3
790 1740
SAE heaped bucket)
3.0 m boom assembly 240 530
1.6 m arm assembly 114 251
0.18 m3 SAE heaped bucket 170 370
Boom cylinder assembly 78 172
Arm cylinder assembly 65 143
Bucket cylinder assembly 37 82
Bucket control link assembly 40 90
Dozer cylinder assembly 40 90
Boom swing cylinder assembly 40 90

1-12
 5. LIFTING CAPACITIES

Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger

MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 235 380 - Down - - -

・ : Rating over-front ・ : Rating over-side or 360 degree

Load radius At max. reach

Load point 2.0 m (7 ft) 3.0 m (10 ft) 4.0 m (13 ft) 5.0 m (16 ft) Capacity Reach
height
m (ft)
5.0 m kg *950 *950 4.12
(16 ft) lb *2090 *2090 (13.5)
4.0 m kg *1020 *1020 *980 780 5.08
(13 ft) lb *2250 *2250 *2160 1720 (16.7)
3.0 m kg *1090 *1090 *1010 650 5.60
(10 ft) lb *2400 *2400 *2230 1430 (18.4)
2.0 m kg *3050 *3050 *1690 *1690 *1320 1100 *1170 760 *1050 590 5.84
(7 ft) lb *6720 *6720 *3730 *3730 *2910 2430 *2580 1680 *2310 1300 (19.2)
1.0 m kg *2360 1610 *1600 1040 *1280 740 *1100 580 5.85
(3 ft) lb *5200 3550 *3530 2290 *2820 1630 *2430 1280 (19.2)
Ground kg *2350 *2350 *2700 1540 *1790 1000 *1350 720 *1140 610 5.63
Line lb *5180 *5180 *5950 3400 *3950 2200 *2980 1590 *2510 1340 (18.5)
-1.0 m kg *3600 3020 *2670 1530 *1800 990 *1180 700 5.13
(-3 ft) lb *7940 6660 *5890 3370 *3970 2180 *2600 1540 (16.8)
-2.0 m kg *3770 3060 *2300 1540 *1140 960 4.23
(-7 ft) lb *8310 6750 *5070 3400 *2510 2120 (13.9)
-3.0 m kg *2040 *2040
(-10 ft) lb *4500 *4500

※ Note
1. Lifting capacity are based on SAE J1097 and ISO 10567.
2. Lifting capacity of the ROBEX series does not exceed 75% of tipping load with the machine on
firm, level ground or 87% of full hydraulic capacity.
3. The lift-point is bucket pivot mounting pin on the arm (without bucket mass).
4. *indicates load limited by hydraulic capacity.

※ Lifting capacities are based upon a standard machine conditions.

Lifting capacities will vary with different work tools, ground conditions and attachments.
The difference between the weight of a work tool attachment must be subtracted.
Consult your Hyundai dealer regarding the lifting capacities for specific work tools and attachments.
Failure to comply to the rated load can cause possible personal injury or property damage.
Make adjustments to the rated load as necessary for non-standard configurations.

1-13
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 235 380 - Up - - -

・ : Rating over-front ・ : Rating over-side or 360 degree

Load radius At max. reach

Load point 2.0 m (7 ft) 3.0 m (10 ft) 4.0 m (13 ft) 5.0 m (16 ft) Capacity Reach
height
m (ft)
5.0 m kg *950 *950 4.12
(16 ft) lb *2090 *2090 (13.5)
4.0 m kg *1020 *1020 *980 740 5.08
(13 ft) lb *2250 *2250 *2160 1630 (16.7)
3.0 m kg *1090 *1080 890 610 5.60
(10 ft) lb *2400 *2380 1960 1340 (18.4)
2.0 m kg *3050 *3050 *1690 1630 *1320 1030 1040 710 810 550 5.84
(7 ft) lb *6720 *6720 *3730 3590 *2910 2270 2290 1570 1790 1210 (19.2)
1.0 m kg 2250 1510 1430 980 1010 690 800 540 5.85
(3 ft) lb 4960 3330 3150 2160 2230 1520 1760 1190 (19.2)
Ground kg *2350 *2350 2170 1440 1390 940 990 670 840 570 5.63
Line lb *5180 *5180 4780 3170 3060 2070 3180 1480 1850 1260 (18.5)
-1.0 m kg *3600 2780 2150 1420 1370 930 970 600 5.13
(-3 ft) lb *7940 6130 4740 3130 3020 2050 2140 1460 (16.8)
-2.0 m kg *3770 2830 2170 1440 *1140 900 4.23
(-7 ft) lb *8310 6240 4780 3170 *2510 1980 (13.9)
-3.0 m kg *2040 *2040
(-10 ft) lb *4500 *4500

1-14
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO ANGLE DOZER Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM BLADE 3000 1600 235 380 - Down - - -

・ : Rating over-front ・ : Rating over-side or 360 degree

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg
(16 ft) lb
4.0 m kg *1240 1140 *1290 1020 4.26
(13 ft) lb *2730 2510 *2840 2250 (14.0)
3.0 m kg *1290 1120 *1260 810 4.87
(10 ft) lb *2840 2470 *2780 1790 (16.0)
2.0 m kg *1980 1660 *1510 1080 *1340 770 *1270 720 5.17
(7 ft) lb *4370 3660 *3330 2380 *2950 1700 *2800 1590 (17.0)
1.0 m kg *2620 1550 *1780 1030 *1430 750 *1360 700 5.24
(3 ft) lb *5780 3420 *3920 2270 *3150 1650 *3000 1540 (17.2)
Ground kg *2880 1490 *1940 1000 *1470 730 *1440 720 5.08
Line lb *6350 3280 *4280 2200 *3240 1610 *3170 1590 (16.7)
-1.0 m kg *3100 2880 *2780 1480 *1910 990 *1500 800 4.66
(-3 ft) lb *6830 6350 *6130 3260 *4210 2180 *3310 1760 (15.3)
-2.0 m kg *3640 2940 *2310 1510 *1550 1050 3.89
(-7 ft) lb *8020 6480 *5090 3330 *3420 2310 (12.8)
-3.0 m kg
(-10 ft) lb

1-14-1
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO ANGLE DOZER Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM BLADE 3000 1600 235 380 - Up - - -

・ : Rating over-front ・ : Rating over-side or 360 degree

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg
(16 ft) lb
4.0 m kg 1210 1050 1080 940 4.26
(13 ft) lb 2670 2310 2380 2070 (14.0)
3.0 m kg 1190 1030 860 750 4.87
(10 ft) lb 2620 2270 1900 1650 (16.0)
2.0 m kg 1800 1520 1150 990 810 700 760 660 5.17
(7 ft) lb 3970 3350 2540 2180 1790 1540 1680 1460 (17.0)
1.0 m kg 1680 1410 1100 940 790 680 730 640 5.24
(3 ft) lb 3700 3110 2430 2070 1740 1500 1610 1410 (17.2)
Ground kg 1620 1350 1060 910 770 670 760 650 5.08
Line lb 3570 2980 2340 2010 1700 1480 1680 1430 (16.7)
-1.0 m kg *3100 2570 1610 1340 1050 900 850 730 4.66
(-3 ft) lb *6830 5670 3550 2950 2310 1980 1870 1610 (15.3)
-2.0 m kg 3350 2620 1630 1370 1120 960 3.89
(-7 ft) lb 7390 5780 3590 3020 2470 2120 (12.8)
-3.0 m kg
(-10 ft) lb

1-14-2
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 285 400 - Down - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

4.0 m kg *1240 1130 *1290 1010 4.26

(13.1 ft) lb *2730 2490 *2840 2230 (14.0)
3.0 m kg *1290 1110 *1260 810 4.87
(9.8 ft) lb *2840 2450 *2780 1790 (16.0)
2.0 m kg *1980 1650 *1510 1070 *1340 760 *1270 720 5.17
(6.6 ft) lb *4370 3640 *3330 2360 *2950 1680 *2800 1590 (17.0)
1.0 m kg *2620 1530 *1780 1020 *1430 740 *1360 690 5.24
(3.3 ft) lb *5780 3370 *3920 2250 *3150 1630 *3000 1520 (17.2)
Ground kg *2880 1480 *1940 990 *1470 730 *1440 710 5.08
Line lb *6350 3260 *4280 2180 *3240 1610 *3170 1570 (16.7)
-1.0 m kg *3100 2860 *2780 1470 *1910 980 *1500 800 4.66
(-3.3 ft) lb *6830 6310 *6130 3240 *4210 2160 *3310 1760 (15.3)
-2.0 m kg *3640 2920 *2310 1490 *1550 1040 3.89
(-6.6 ft) lb *8020 6440 *5090 3280 *3420 2290 (12.8)
-3.0 m kg
(-9.8 ft) lb

1-14-3
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 285 400 - Up - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

4.0 m kg *1240 1030 1140 930 4.26

(13.1 ft) lb *2730 2270 2510 2050 (14.0)
3.0 m kg 1260 1020 910 740 4.87
(9.8 ft) lb 2780 2250 2010 1630 (16.0)
2.0 m kg 1910 1500 1220 980 860 690 810 650 5.17
(6.6 ft) lb 4210 3310 2690 2160 1900 1520 1790 1430 (17.0)
1.0 m kg 1780 1380 1170 930 840 670 780 630 5.24
(3.3 ft) lb 3920 3040 2580 2050 1850 1480 1720 1390 (17.2)
Ground kg 1730 1330 1130 890 820 660 810 640 5.08
Line lb 3810 2930 2490 1960 1810 1460 1790 1410 (16.7)
-1.0 m kg *3100 2530 1720 1320 1120 880 910 720 4.66
(-3.3 ft) lb *6830 5580 3790 2910 2470 1940 2010 1590 (15.3)
-2.0 m kg 3600 2580 1740 1350 1190 940 3.89
(-6.6 ft) lb 7940 5690 3840 2980 2620 2070 (12.8)
-3.0 m kg
(-9.8 ft) lb

1-14-4
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1900 285 400 - Down - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 1.0 m (3.3 ft) 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg *1210 *1210 3.64

(16.4 ft) lb *2670 *2670 (11.9)
4.0 m kg *1070 *1070 *1090 890 4.63
(13.1 ft) lb *2360 *2360 *2400 1960 (15.2)
3.0 m kg *1150 1130 *1180 780 *1030 730 5.19
(9.8 ft) lb *2540 2490 *2600 1720 *2270 1610 (17.0)
2.0 m kg *1750 1680 *1400 1080 *1250 770 *1040 660 5.47
(6.6 ft) lb *3860 3700 *3090 2380 *2760 1700 *2290 1460 (18.0)
1.0 m kg *2460 1560 *1690 1030 *1380 740 *1100 640 5.53
(3.3 ft) lb *5420 3440 *3730 2270 *3040 1630 *2430 1410 (18.2)
Ground kg *1490 *1490 *2840 1490 *1910 990 *1460 720 *1230 650 5.38
Line lb *3280 *3280 *6260 3280 *4210 2180 *3220 1590 *2710 1430 (17.7)
-1.0 m kg *1930 *1930 *2720 *2720 *2850 1470 *1940 970 *1400 720 5.00
(-3.3 ft) lb *4250 *4250 *6000 *6000 *6280 3240 *4280 2140 *3090 1590 (16.4)
-2.0 m kg *3150 *3150 *4120 *2890 *2510 1480 *1690 980 *1460 900 4.30
(-6.6 ft) lb *6940 *6940 *9080 *6370 *5530 3260 *3730 2160 *3220 1980 (14.1)
-3.0 m kg *2480 *2480 *1440 *1440 *1430 *1430 3.01
(-9.8 ft) lb *5470 *5470 *3170 *3170 *3150 *3150 (9.9)

1-14-5
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1900 285 400 - Up - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 1.0 m (3.3 ft) 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg *1210 1200 3.64

(16.4 ft) lb *2670 2650 (11.9)
4.0 m kg *1070 1050 1010 820 4.63
(13.1 ft) lb *2360 2310 2230 1810 (15.2)
3.0 m kg *1150 1030 880 720 830 670 5.19
(9.8 ft) lb *2540 2270 1940 1590 1830 1480 (17.0)
2.0 m kg *1750 1530 1230 990 870 700 750 600 5.47
(6.6 ft) lb *3860 3370 2710 2180 1920 1540 1650 1320 (18.0)
1.0 m kg 1820 1410 1180 940 840 680 720 580 5.53
(3.3 ft) lb 4010 3110 2600 2070 1850 1500 1590 1280 (18.2)
Ground kg *1490 *1490 1740 1340 1140 900 820 660 740 590 5.38
Line lb *3280 *3280 3840 2950 2510 1980 1810 1460 1630 1300 (17.7)
-1.0 m kg *1930 *1930 *2720 2520 1720 1320 1120 880 820 650 5.00
(-3.3 ft) lb *4250 *4250 *6000 5560 3790 2910 2470 1940 1810 1430 (16.4)
-2.0 m kg *3150 *3150 3580 2560 1730 1340 1130 890 1020 810 4.30
(-6.6 ft) lb *6940 *6940 7890 5640 3810 2950 2490 1960 2250 1790 (14.1)
-3.0 m kg *2480 *2480 *1440 1400 *1430 1400 3.01
(-9.8 ft) lb *5470 *5470 *3170 3090 *3150 3090 (9.9)

1-14-6
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 335 400 - Down - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

4.0 m kg *1240 1160 *1290 1040 4.26

(13.1 ft) lb *2730 2560 *2840 2290 (14.0)
3.0 m kg *1290 1140 *1260 830 4.87
(9.8 ft) lb *2840 2510 *2780 1830 (16.0)
2.0 m kg *1980 1690 *1510 1100 *1340 780 *1270 740 5.17
(6.6 ft) lb *4370 3730 *3330 2430 *2950 1720 *2800 1630 (17.0)
1.0 m kg *2620 1570 *1780 1050 *1430 760 *1360 710 5.24
(3.3 ft) lb *5780 3460 *3920 2310 *3150 1680 *3000 1570 (17.2)
Ground kg *2880 1520 *1940 1010 *1470 750 *1440 730 5.08
Line lb *6350 3350 *4280 2230 *3240 1650 *3170 1610 (16.7)
-1.0 m kg *3100 2940 *2780 1510 *1910 1000 *1500 820 4.66
(-3.3 ft) lb *6830 6480 *6130 3330 *4210 2200 *3310 1810 (15.3)
-2.0 m kg *3640 2990 *2310 1540 *1550 1070 3.89
(-6.6 ft) lb *8020 6590 *5090 3400 *3420 2360 (12.8)
-3.0 m kg
(-9.8 ft) lb

1-14-7
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1600 335 400 - Up - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

4.0 m kg *1240 1060 1170 950 4.26

(13.1 ft) lb *2730 2340 2580 2090 (14.0)
3.0 m kg *1290 1050 940 760 4.87
(9.8 ft) lb *2840 2310 2070 1680 (16.0)
2.0 m kg 1950 1540 1250 1000 880 710 840 670 5.17
(6.6 ft) lb 4300 3400 2760 2200 1940 1570 1850 1480 (17.0)
1.0 m kg 1830 1420 1200 960 860 690 800 650 5.24
(3.3 ft) lb 4030 3130 2650 2120 1900 1520 1760 1430 (17.2)
Ground kg 1770 1370 1160 920 850 680 830 660 5.08
Line lb 3900 3020 2560 2030 1870 1500 1830 1460 (16.7)
-1.0 m kg *3100 2600 1760 1360 1150 910 930 750 4.66
(-3.3 ft) lb *6830 5730 3880 3000 2540 2010 2050 1650 (15.3)
-2.0 m kg *3640 2650 1790 1390 1220 970 3.89
(-6.6 ft) lb *8020 5840 3950 3060 2690 2140 (12.8)
-3.0 m kg
(-9.8 ft) lb

1-14-8
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1900 335 400 - Down - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 1.0 m (3.3 ft) 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg *1210 *1210 3.64

(16.4 ft) lb *2670 *2670 (11.9)
4.0 m kg *1070 *1070 *1090 920 4.63
(13.1 ft) lb *2360 *2360 *2400 2030 (15.2)
3.0 m kg *1150 *1150 *1180 800 *1030 750 5.19
(9.8 ft) lb *2540 *2540 *2600 1760 *2270 1650 (17.0)
2.0 m kg *1750 1730 *1400 1110 *1250 790 *1040 680 5.47
(6.6 ft) lb *3860 3810 *3090 2450 *2760 1740 *2290 1500 (18.0)
1.0 m kg *2460 1600 *1690 1060 *1380 770 *1100 660 5.53
(3.3 ft) lb *5420 3530 *3730 2340 *3040 1700 *2430 1460 (18.2)
Ground kg *1490 *1490 *2840 1530 *1910 1020 *1460 750 *1230 670 5.38
Line lb *3280 *3280 *6260 3370 *4210 2250 *3220 1650 *2710 1480 (17.7)
-1.0 m kg *1930 *1930 *2720 *2720 *2850 1510 *1940 1000 *1400 740 5.00
(-3.3 ft) lb *4250 *4250 *6000 *6000 *6280 3330 *4280 2200 *3090 1630 (16.4)
-2.0 m kg *3150 *3150 *4120 2970 *2510 1530 *1690 1010 *1460 920 4.30
(-6.6 ft) lb *6940 *6940 *9080 6550 *5530 3370 *3730 2230 *3220 2030 (14.1)
-3.0 m kg *2480 *2480 *1440 *1440 *1430 *1430 3.01
(-9.8 ft) lb *5470 *5470 *3170 *3170 *3150 *3150 (9.9)

1-14-9
 Type Boom Arm Counterweight Shoe Wheel Dozer Outtriger
MONO Length [mm] Length [mm] weight [kg] width [mm] width [mm] Front Rear Front Rear
BOOM 3000 1900 335 400 - Up - - -

· : Rating over-front · : Rating over-side or 360 degree A

Load radius At max. reach

Load point 1.0 m (3.3 ft) 2.0 m (6.6 ft) 3.0 m (9.8 ft) 4.0 m (13.1 ft) 5.0 m (16.4 ft) Capacity Reach
height
m (ft)

5.0 m kg *1210 *1210 3.64

(16.4 ft) lb *2670 *2670 (11.9)
4.0 m kg *1070 *1070 1030 840 4.63
(13.1 ft) lb *2360 *2360 2270 1850 (15.2)
3.0 m kg *1150 1060 910 740 850 690 5.19
(9.8 ft) lb *2540 2340 2010 1630 1870 1520 (17.0)
2.0 m kg *1750 1570 1260 1020 890 720 770 620 5.47
(6.6 ft) lb *3860 3460 2780 2250 1960 1590 1700 1370 (18.0)
1.0 m kg 1860 1450 1210 970 870 700 740 600 5.53
(3.3 ft) lb 4100 3200 2670 2140 1920 1540 1630 1320 (18.2)
Ground kg *1490 *1490 1790 1380 1170 930 850 680 760 610 5.38
Line lb *3280 *3280 3950 3040 2580 2050 1870 1500 1680 1340 (17.7)
-1.0 m kg *1930 *1930 *2720 2590 1760 1360 1150 910 840 670 5.00
(-3.3 ft) lb *4250 *4250 *6000 5710 3880 3000 2540 2010 1850 1480 (16.4)
-2.0 m kg *3150 *3150 3670 2630 1780 1380 1160 920 1050 840 4.30
(-6.6 ft) lb *6940 *6940 8090 5800 3920 3040 2560 2030 2310 1850 (14.1)
-3.0 m kg *2480 *2480 *1440 *1440 *1430 *1430 3.01
(-9.8 ft) lb *5470 *5470 *3170 *3170 *3150 *3150 (9.9)

1-14-10
6. BUCKET SELECTION GUIDE

0.07m3 SAE 0.18 m3 SAE

heaped bucket heaped bucket

Recommendation
Capacity Width
3.0 m (9' 10") boom
Weight
SAE CECE Without With
1.6 m (5' 3") arm
heaped heaped side cutter side cutter
0.07 m3 0.06 m3 315 mm 360 mm 115 kg
(0.09 yd3) (0.08 yd3) (12.4") (14.2") (255 lb) Applicable for materials with density of 1600 kgf/m3
0.18 m3 0.15 m3 670 mm 740 mm 170 kg (2700 lb/yd3) or less
(0.24 yd3) (0.20 yd3) (26.4") (29.1") (375 lb)

1-15
7. UNDERCARRIAGE

1) TRACKS
X-leg type center frame is integrally welded with reinforced box-section track frames. The design
includes dry tracks, lubricated rollers, idlers, sprockets, hydraulic track adjusters with shock
absorbing springs and assembled track-type tractor shoes with triple grousers.
2) TYPES OF SHOES
Triple grouser Rubber shoe

Model Shapes

Shoe width mm (in) 380 (15) 400 (16)

Operating weight kg (lb) 5650 (12460) 5670 (12500)
R55-9A
Ground pressure kgf/cm2 (psi) 0.34 (4.83) 0.33 (4.69)
Overall width mm (ft-in) 1880 (6' 2") 1900 (6' 3")

3) NUMBER OF ROLLERS AND SHOES ON EACH SIDE

Item Quantity
Carrier rollers 1 EA
Track rollers 5 EA
Track shoes (steel) 40 EA

1-16
8. SPECIFICATIONS FOR MAJOR COMPONENTS

1) ENGINE
Item Specification
Model Yanmar 4TNV98C
Type 4-cycle diesel engine, low emission
Cooling method Water cooling
Number of cylinders and arrangement 4 cylinders, in-line
Firing order 1-3-4-2
Combustion chamber type Direct injection type
Cylinder bore×stroke 98×110 mm (3.85"×4.33")
Piston displacement 3319 cc (203 cu in)
Compression ratio 18.5 : 1
Rated gross horse power (SAE J1995) 66.9 Hp at 2400 rpm (49.9 kW at 2400 rpm)
Maximum torque at 1550 rpm 24 kgf·m (173.6 lbf·ft)
Engine oil quantity 11.6ℓ(3.1 U.S. gal)
Dry weight 270 kg (595 lb)
High idling speed 2300+50 rpm
Low idling speed 1000±100 rpm
Rated fuel consumption 176 g/Hp·hr at 2400 rpm
Starting motor 12 V-3.0 kW
Alternator 12 V-60 A
Battery 1×12 V×100 Ah

2) MAIN PUMP
Item Specification
Type Variable displacement tandem axis piston pumps
Capacity 2×27.5 cc/rev
Maximum pressure 220 kgf/cm2 (3130 psi)
Rated oil flow 2×57.8ℓ/min (15.3 U.S. gpm / 12.7 U.K. gpm)
Rated speed 2100 rpm

1-17
 3) GEAR PUMP
Item Specification
Type Fixed displacement gear pump single stage
Capacity 18.3 + 4.5 cc/rev
Maximum pressure 220/30 kgf/cm2 (3130/430 psi)
Rated oil flow 38.4/9.5ℓ/min (10.1/2.5 U.S. gpm / 8.4/2.1 U.K. gpm)

4) MAIN CONTROL VALVE

Item Specification
Type Sectional, 9 spools
Operating method Hydraulic pilot system
Main relief valve pressure 220 kgf/cm2 (3130 psi)
Overload relief valve pressure 240 kgf/cm2 (3410 psi)

5) SWING MOTOR
Item Specification
Type Fixed displacement axial piston motor
Capacity 32.3 cc/rev
Relief pressure 220 kgf/cm2 (3130 psi)
Braking system Automatic, spring applied hydraulic released
Braking torque 14 kgf·m (101 lbf·ft)
Brake release pressure 20~40 kgf/cm2 (284~570 psi)
Reduction gear type 2 - stage planetary

6) TRAVEL MOTOR
Item Specification
Type Variable displacement axial piston motor
Relief pressure 220 kgf/cm2 (3130 psi)
Reduction gear type 2-stage planetary
Braking system Automatic, spring applied hydraulic released
Brake release pressure 9 kgf/cm2 (128 psi)
Braking torque 8.4 kgf·m (61 lbf·ft)

1-18
 7) CYLINDER
Item Specification
Bore dia×Rod dia×Stroke Ø110×Ø65×715 mm
Boom cylinder
Cushion Extend only
Bore dia×Rod dia×Stroke Ø90×Ø55×850 mm
Arm cylinder
Cushion Extend and retract
Bore dia×Rod dia×Stroke Ø80×Ø50×660 mm
Bucket cylinder
Cushion Extend only
Bore dia×Rod dia×Stroke Ø110×Ø60×219 mm
Dozer blade
Cushion Extend only
※ Discoloration of cylinder rod can occur when the friction reduction additive of lubrication oil spreads on
the rod surface.
※ Discoloration does not cause any harmful effect on the cylinder performance.

8) SHOE
Item Width Ground pressure Link quantity Overall width
Steel 380 mm (15") 0.34 kgf/cm2 (4.83 psi) 40 1880 mm (6' 2")
R55-9A
Rubber 400 mm (16") 0.33 kgf/cm2 (4.69 psi) - 1900 mm (6' 3")

9) BUCKET
Capacity Tooth Width
Item
SAE heaped CECE heaped quantity Without side cutter With side cutter

STD 0.18 m3 (0.24 yd3) 0.15 m3 (0.20 yd3) 5 670 mm (26.4") 740 mm (29.1")
R55-9A
OPT 0.07 m3 (0.09 yd3) 0.06 m3 (0.08 yd3) 3 315 mm (12.4") 360 mm (14.2")

1-19
9. RECOMMENDED OILS
HYUNDAI genuine lubricating oils have been developed to offer the best performance and service life for
your equipment. These oils have been tested according to the specifications of HYUNDAI and, therefore, will
meet the highest safety and quality requirements.
We recommend that you use only HYUNDAI genuine lubricating oils and grease officially approved by
HYUNDAI.
Ambient temperature˚C(˚F)
Capacity
Service point Kind of fluid
ℓ (U.S. gal) -50 -30 -20 -10 0 10 20 30 40
(-58) (-22) (-4) (14) (32) (50) (68) (86) (104)
★SAE 5W-40
SAE 30
Engine SAE 10W
Engine oil 11.6 (3.1)
oil pan
SAE 10W-30

SAE 15W-40

★NLGI NO.1
Grease 0.2 (0.1)
Swing drive NLGI NO.2

1.5 (0.4) ★SAE 75W-90

Gear oil
1.2×2 SAE 80W-90
Final drive
(0.3×2)

Tank; ★ISO VG 15
Hydraulic 70 (18.5) ISO VG 32
Hydraulic oil
tank System; ISO VG 46, HBHO VG 46★3
120 (31.7)
ISO VG 68

★ASTM D975 NO.1

Fuel tank Diesel fuel★1 120 (31.7)
ASTM D975 NO.2

Fitting ★NLGI NO.1

Grease As required
(grease nipple) NLGI NO.2
Mixture of
Radiator Ethylene glycol base permanent type
antifreeze
(reservoir 9.5 (2.5)
and water ★Ethylene glycol base permanent type (60 : 40)
tank)
50 : 50★2
SAE : Society of Automotive Engineers ★: Cold region
API : American Petroleum Institute Russia, CIS, Mongolia
★1 : Ultra low sulfur diesel
ISO : International Organization for Standardization
- sulfur content  15 ppm
NLGI : National Lubricating Grease Institute
★2 : Soft water
ASTM : American Society of Testing and Material
City water or distilled water
UTTO : Universal Tractor Transmission Oil ★3 : Hyundai Bio Hydraulic Oil
- For more information, contact HYUNDAI dealers.
※ Using any lubricating oils other than HYUNDAI genuine products may lead to a deterioration of performance
and cause damage to major components.
※ Do not mix HYUNDAI genuine oil with any other lubricating oil as it may result in damage to the systems of
major components.
※ Do not use any engine oil other than that specified above, as it may clog the diesel particulate filter(DPF).
※ For HYUNDAI genuine lubricating oils and grease for use in regions with extremely low temperatures, please
contact HYUNDAI dealers.
1-20
 SECTION 2 STRUCTURE AND FUNCTION
Group 1 Pump Device -------------------------------------------------------------------------------------------------- 2-1
Group 2 Main Control Valve ---------------------------------------------------------------------------------------- 2-9
Group 3 Swing Device ------------------------------------------------------------------------------------------------- 2-31
Group 4 Travel Device -------------------------------------------------------------------------------------------------- 2-41
Group 5 RCV Lever ------------------------------------------------------------------------------------------------------ 2-50
 SECTION 2 STRUCTURE AND FUNCTION
GROUP 1 HYDRAULIC PUMP

1. GENERAL
This is a variable displacement double-piston pump for discharge with equal displacements from one
cylinder block. This pump is so compact as to appear a single pump though this is actually a double
pump.
Because this pump has one swash plate, the tilting angle is the same for two pumps. Tilting of the
pump changes in response to the total pressure of P1 + P2. Namely, the output is controlled to the
constant value so that the relationship between the discharge pressure and flow rate Q becomes
constant, (P1 + P2)×Q =Constant.
The third pump and pilot pump can be connected to the same shaft via a coupling.

A1 A2
A1G A2G A3G PPG
R1 A1 A2 A3 A4

ENG

S1

PPG Hydraulic circuit

R1 A3 A1G A2G

A4 A3G S1
555C92MP01

Description of the ports

Port Name Bore
S1 Suction port SAE 1 1/2 (standard)
A1, A2 Discharge port PF 1/2
A3 Discharge port PF 1/2
A4 Discharge port PF 1/4
A1G, A2G Gauge port PF 1/4 With quick coupler
A3G Gauge port PF 1/8 With quick coupler
A4G Gauge port PF 1/4 With quick coupler
R1 Air bleeder port M10×1.0 (with bleeder valve)

2-1
2. PRINCIPAL COMPONENTS AND FUNCTIONS

1 2 5 8

3 6 4 7 R5572SF02

1 Drive shaft 5 Control spring

2 Hanger 6 Control piston
3 Rotary group 7 Gear pump
4 Cover 8 Housing

SPECIFICATIONS
● Capacity : 2×27.5+18.3+4.5 cc/rev
● Rated oil flow : 2×57.8+38.4+9.5 ℓ/min
● Rated pressure : 3×220+30 kgf/cm2

This is a variable displacement double-piston pump for discharge with two equal displacements
from one cylinder block. Because this is one rotary group, there is only one suction port.
The oil is divided into two equal flows by the control plate in the cover and directed to two
discharge ports provided in the cover.
The discharge pressure directed to the control piston tilts the hanger by overcoming the spring
force.
Since the piston stroke changes according to the tilting angle of the hanger, the flow can be
changed.
The simultaneous tilting angle constant-output control method is employed.
The third pump and pilot pump can be connected to the same shaft via a coupling.

2-2
1) PRINCIPLE OF OPERATION
(1) Function of pump

Piston α
Lower dead point
Hanger
Cylinder block (Swash plate)

Control plate
Discharge port

P1

P2

Upper dead point

Discharge
process

Suction process

Suction port

R5572SF03

The cylinder block is connected via spline and can rotate together with the drive shaft.
The piston assembled into the cylinder block performs reciprocal operation while following the
swash plate on the hanger.
The piston moves in a direction to increase the displacement during a stroke from the lower to the
upper dead points. The oil flows from the suction port via a port plate into the cylinder block
(suction process).
During a stroke from the upper to the lower dead points, the piston moves in a direction to
decrease the displacement. The oil is discharged to the discharge port (discharge process).
The displacement can be changed by changing the tilting of the hanger (swash plate).
The oil sucked through the port in the cylinder block is discharged from the discharge port in the
port plate.
The oil sucked through the port on the outside of the cylinder block is discharged from the
discharge port on the outside of the port plate.

2-3
2) CONTROL FUNCTIONS

Spring A Spring B

Hanger D D
Piston
P

A+B P1
pressure

Piston P3
Total

A
Piston
for P3 shift
Shifting line

Piston
Pi
Q max P2
Flow rate
Section D-D
R5572SF04

The discharge pressures P1 and P2 are directed to the pistons of equal area act on the hanger.
The spring is provided to act against the discharge pressure. When the oil pressure acting on the
piston is less than the installation load of the spring A (outer spring), the hanger is fixed to the
maximum tilting position. When the oil, pressure acting on the piston exceeds the installation load
of the spring A the hanger is tilted and kept tilted at a position where the oil pressure is balanced
with the spring force. (region A in the middle of the figure above)
When the oil pressure acting on the piston rises further to reduce the tilting angle, the spring B
which has been inactive up to now becomes active.
To overcome the spring force of two springs, the oil pressure must be higher and the shifting line
becomes more steep. (regions A + B in the middle of the figure above)
When the P3 oil pressure acts on the shift piston, the control shifting line is shifted.

2-4
3) CONTROL / ADJUSTMENT PROCEDURE
(1) Loosen the hexagonal nut.
(2) Tighten or loosen the adjusting screw to set the power shifting line.

Spring seat Cover

Adjusting screw

Tighten

Total pressure
P (P1+P2)
Loosen

Nut
Q max
Flow rate
Tighten Loosen
R5572SF05

2-5
3. ADJUSTMENT
This hydraulic pump has been set and inspected according to your specified input power and control.
Readjustment of all the adjusting portions may lead to the loss of functions specified for each control
and the pump proper may be excluded from the scope of guarantee. Never attempt operating the
adjusting screw, etc.

4. INSTALLATION
(1) Install the pump so that the input shaft becomes horizontal.
(2) Install the pump in a position lower than the lowest oil level in the tank to allow continuous flow of
the oil into the pump.
(3) Since the pump is installed directly to the diesel engine, always use a flexible hose. Install the
suction pipe firmly to prevent suction of an air.
(4) Use the high-pressure type flexible hoses for the discharge ports P1 and P2.
(5) After installation, fill the pump housing with the hydraulic oil.
(6) Do not direct the external drain piping from within the oil.

5. DRIVE
(1) Use a flexible coupling for connection to the motor.
(2) Insert the coupling firmly onto the input shaft. Do not hammer the coupling during insertion.
(3) The input shaft must rotate clockwise when viewed from the shaft end.

6. HYDRAULIC OIL
The hydraulic oil to be used must be a general petroleum, hydraulic oil or wear-resistant hydraulic oil
(ISO 3448, VG 32 ~ 56 or equivalent).
The applicable viscosity range is as follows :
Maximum allowable viscosity : 1000 mm2/s
Minimum allowable viscosity : 10 mm2/s
Recommended viscosity range : 15 ~ 150 mm2/s

7. STARTING PROCEDURE
※ Before start up, check the following points and observe the cautions :
(1) Check if the tank has been washed clean.
(2) Check if the piping is clean and installed in such a manner as to prevent stress on the pump.
(3) Check if the piping is connected correctly according to the piping (circuit) diagram.
(4) Check if the joint and flange are correctly tightened.
(5) Check if the joint between the motor and pump is correctly installed.
(6) Check if the motor rotation direction agrees with the pump rotation direction.
(7) Check if the specific hydraulic oil is supplied though the filter and filled in the tank to the specified
position of the oil level gage.
(8) Check if the filter has the specified filtration accuracy (10 ㎛ or less).
(9) Check if the filter has been installed correctly relative to the float direction.
(10) Check if the pump housing is filled with oil.
(11) Check if the control valve is set to the bypass position.
(12) Start the motor. If necessary, carry out warm-up operation at low speed.
(13) Check, without any load on the system, if the actuator operates correctly.

2-6
 (14) When the motor has reached the operation speed, check the operation while applying the load to
the actuator.
(15) Check the monitoring or measuring instrument if installed.
(16) Check the noise level.
(17) Check the oil level in the tank. Supply the oil. If required.
(18) Check the setting of the pressure control valve while applying the load to the actuator.
(19) Check the parts for any leakage.
(20) Stop the motor.
(21) Retighten all the bolts and plugs even when they have proved to by free from Leakage.
(Be sure to remove the pressure from the circuit before retightening.)
(22) Check the oil level in the tank.
(23) Check if the pump and actuator function correctly.
(24) Irregular operation of the actuator indicates that an air is left still in the circuit. When the air is
bleeded completely from the circuit, all the parts operates smoothly without any irregular
movement and there is no bubble in the oil of the tank.
(25) Check the oil temperature.
(26) Stop the motor.
(27) Check the filter if the element is fouled.
(28) If the element is heavily fouled, carry out flashing in the circuit.
※ To prevent damage to the pump, be sure to observe the following cautions during the operation
which may allow entry of the actuator, hydraulic oil change, etc :
(1) After oil supply, fill the pump housing with the hydraulic oil.
(2) Start the pump with the speed of 1000 rpm or less and take care not to allow the oil level to lower
below the specified level of the oil level gauge.
(3) When bleeding an air from the hydraulic circuit, keep the motor speed at 1000 rpm or less.
Operate each actuator for three or more cycles and carry out idling for 5 minutes or more.
8. MAINTENANCE
The maintenance of this hydraulic pump is limited mainly to the tank, in particular, the hydraulic oil
change.
Since the maintenance interval varies depending on respective operation and use conditions, the
cautions described below for the users should be for reference only.
(1) Checking the filter
① Every day for the initial period after start up.
② Once a week when the operation becomes stable.
③ Once a month when the operation hours exceed about 100 hours.

※ When any part of the hydraulic system is changed (e.g., assembling of an additional part, change
and repair of the piping), check the filter newly as in the case of startup.
(2) Changing the filter
① After startup
② After 500 hours of operation
③ Every 500 hours of operation after that, and each time the hydraulic oil is changed or the failure
occurs. If any abnormal fouling of the filter is observed during daily check up to the first filter
change after startup, find out the cause.
In this case, do not extend the check and filter change intervals to 500 hours.
※ The paper filter can not be cleaned. Change the filter as a whole.

2-7
(3) Changing the hydraulic oil
① After 2000 hours of operation.
② Every 2000 hours of operation or once a year after that.

The change interval may have to be shortened depending on the degree of fouling and the
thermal load condition of the hydraulic oil.
If the hydraulic oil is not appropriate and need be changed, pay attention to the following points :
Be sure to control the oil temperature below the highest temperature and above the lowest
temperature during operation in winter and summer.
Pay attention to the following points during change of the hydraulic oil :
- Change the hydraulic oil as a whole quantity.
- Do not allow dust to mix into the circuit.
- Clean the tank inside.
- Supply the oil through the filter.
(4) Checking for the oil leakage
① Daily during the initial period after startup.
② Once a week when the operation becomes stable.

(5) Checking the temperature

① Monitor the temperature continuously.
② When the viscosity is above the allowable value because of low hydraulic oil temperature,
warm-up operation is necessary.
Start the motor with the speed set to about one half of the rated speed, then operate the actuator
under the load for a short period.
When the oil temperature is below the allowable ambient temperature, it is necessary to preheat
the oil tank before start of the motor.
Take care not to allow the hydraulic oil temperature to exceed +90˚C

2-8
 GROUP 2 MAIN CONTROL VALVE
1. OUTLINE a9
xb9
MR1 a8
a4 a6 a10
a1 a2 aW sa a5 a7 Gauge a11

Ai Pp

T1 A9
A1 A2 AW A4 A5 A6 A7 A8 A10

T2

B8
B1 B2 BW P3 B4 B5 B6 B7 B9 B10
P2 P1

b1 b2 bW sb b4 b5 b6 b7 b8 b9 b10 b11
MR3

559A2MC01

Port Tightening Port Tightening

Mark Port name Mark Port name
size torque size torque
P1 P1 pump port B10 Bucket in port
PF1/2 6~7 kgf·m
P2 P2 pump port B11 Arm 2 port
T2 Tank return port PF3/4 8~9 kgf·m
P3 P3 pump port
T1 Tank return port PF1 10~12 kgf·m
A1 Swing port (LH) a1 Swing pilot port (LH)
B1 Swing port (RH) b1 Swing pilot port (RH)
A2 Dozer down port a2 Dozer down pilot port
B2 Dozer up port b2 Dozer up pilot port
AW Boom swing port (LH) aw Boom swing pilot port (LH)
bw Boom swing pilot port (RH)
BW Boom swing port (RH)
a4 2 Way pilot port (opt)
A4 2 Way (opt) b4 2 Way pilot port (opt)
B4 2 Way (opt) PF a5 Boom 2 pilot port
A5 Boom 2 port 1/2 6.0~7.0 b5 Breaker pilot port
B5 Breaker port kgf·m a6 Arm out pilot port
PF1/4
b6 Arm in pilot port 2.5~3.0
A6 Arm out port
a7 Travel pilot port (LH/FW) kgf·m
B6 Arm in port b7 Travel pilot port (LH/RR)
A7 Travel port [LH/FW] a8 Travel pilot port (RH/FW)
B7 Travel port [LH/RR] b8 Travel pilot port (RH/RR)
A8 Travel port [RH/FW] a9 Boom up pilot port
b9 Boom down pilot port
B8 Travel port [RH/RR]
a10 Bucket out pilot port
A9 Boom up port b10 Bucket in pilot port
B9 Boom down port a11 Arm 2 pilot port
A10 Bucket out port b11 Arm 2 pilot port
MR1 Pp Pilot supply port
Main relief valve - PF1/4
MR3 Ai Auto idle signal port

2-9
 2. STRUCTURE (1/4)
5-4
5-15
5-101 5-11 5-3 5-5 4-4
5-2 5-6
5-102 4-111 4-3
5-9 4-112
5-8 4-113 4-5
4-101 4-6
4-102 4-15 3-4
4-9 4-2 3-111
4-8 3-112 3-3
5-1 5-121 3-113 3-5
5-122 3-101 3-6
4-1 3-15 2-3
3-102
5-3 4-13 3-9 3-2
4-12 3-8 2-7
5-15 2-5
5-7 2-101 2-6
5-6 4-14 3-1 2-102 2-15
5-5 4-3 3-12 3-13 2-9
4-15 2-8 2-2
4-7
4-6 3-14 2-112
4-5 2-111 2-12
3-3
3-15
3-7
3-6 2-1 1-4
3-5 2-13
2-7 2-14 1-3
2-15
2-4 17
2-6 1-6 1-1 1-5
2-5 1-2 18
55Z92MC02

1 Ai cover 3 Dozer section assy 4 Boom swing assy 5 Inlet section assy-P3
2 Swing section assy 3-1 Work block 4-1 Work block 5-1 Work block (Ta)
2-1 Work block 3-2 Spool assy 4-2 Spool assy 5-2 Spool assy
2-2 Spool assy 3-3 O-ring 4-3 O-ring 5-3 O-ring
2-3 Pilot cap (A) 3-4 Pilot cap (A) 4-4 Pilot cap (A) 5-4 Pilot cap (A)
2-4 Pilot cap (B1) 3-5 Socket bolt 4-5 Wrench bolt 5-5 Wrench bolt
2-5 Wrench bolt 3-6 Plain washer 4-6 Plain washer 5-6 Plain washer
2-6 Plain washer 3-7 Pilot cap (B1) 4-7 Pilot cap (B1) 5-7 Pilot cap (B1)
2-7 O-ring 3-8 Check poppet 4-8 Check poppet 5-8 Check poppet
2-8 Check poppet 3-9 Check spring 4-9 Check spring 5-9 Check spring
2-9 Check spring 3-10 Plug 4-10 Plug assy 5-10 Plug assy
2-10 Plug 3-101 Check plug (M14) 4-101 Plug 1-Check (M14) 5-101 Plug 1-Check (M14)
2-101 Plug 1-Check M14 3-102 O-ring 4-102 O-ring 5-102 O-ring
2-102 O-ring 3-11 Plug 4-11 Plug assy 5-11 Main relief valve
2-11 Plug 3-111 Plug 4-111 Plug 5-12 Cap-PF1/4 plug
2-111 Plug-PF3/8 3-112 O-ring 4-112 O-ring 5-121 Cap-PF1/4 plug
2-112 O-ring 3-113 O-ring 4-113 O-ring 5-122 O-ring
2-12 O-ring 3-12 Check valve 4-12 Check valve 5-15 Gasket
2-13 O-ring 3-13 O-ring 4-13 O-ring 17 Tie bolt
2-14 Plug-Taper 3-14 O-ring 4-14 O-ring 18 Nut
2-15 Gasket 3-15 Gasket 4-15 Gasket

2-10
 STRUCTURE (2/4)
9-4
9-15
9-3 9-5
9-101 9-6
9-102
9-9 9-2 8-4
9-8 8-15
8-3 8-5
8-11 8-6
8-101
8-102 7-4
9-1 9-12 )
8-9 ON
7-15 PTI
8-8 (O
9-11 7-3 7-5 AY
7-101 7-11 2-
W
8-2 7-6
8-1 7-102 6-4
9-3 9-13 8-11 7-9
9-15 8-12 7-8 6-15
9-7 7-2
9-6 9-11 7-1 6-3
6-5
9-5 8-13 6-101 6-11 6-6
7-13 6-102
8-3 7-123 6-9
8-15 7-122 6-8 6-2
8-7 7-121
8-6
8-5 7-3 7-14
7-15 6-11
7-7
7-6
7-5
6-1 6-13 6-12
6-3
6-15
6-7
6-6
6-5

55Z92MC03

6 2- way section assy 7-1 Work block (Ba3) 7-14 O-ring 8-15 Gasket
6-1 Work block 7-2 Spool assy 7-15 Gasket 9 Travel section assy
6-2 Spool assy 7-3 O-ring 8 Arm 1 section assy 9-1 Work block (Dk)
6-3 O-ring 7-4 Pilot cap (A) 8-1 Work block (B3) 9-2 Spool assy
6-4 Pilot cap (A) 7-5 Wrench bolt 8-2 Spool assy 9-3 O-ring
6-5 Wrench bolt 7-6 Plain washer 8-3 O-ring 9-4 Pilot cap (A)
6-6 Plain washer 7-7 Pilot cap (B1) 8-4 Pilot cap (A) 9-5 Wrench bolt
6-7 Pilot cap (B1) 7-8 Check poppet 8-5 Socket bolt 9-6 Plain washer
6-8 Check poppet 7-9 Check spring 8-6 Plain washer 9-7 Pilot cap (B1)
6-9 Check spring 7-10 Plug assy 8-7 Pilot cap (B1) 9-8 Check poppet
6-10 Plug assy 7-101 Plug 8-8 Check poppet 9-9 Check spring
6-101 Plug 1-Check (M14) 7-102 O-ring 8-9 Check spring 9-10 Plug 1-Check (M14)
6-102 O-ring 7-11 Overload relief valve 8-10 Plug 9-101 Plug 1-Check (M14)
6-11 Overload relief valve 7-12 Plug assy 8-101 Plug 1-Check (M14) 9-102 O-ring
6-12 O-ring 7-121 Plug 8-102 O-ring 9-11 Taper plug
6-13 O-ring 7-122 O-ring 8-11 Overload relief valve 9-12 O-ring
6-15 Gasket 7-123 O-ring 8-12 O-ring 9-13 O-ring
7 Boom2/Breaker assy 7-13 O-ring 8-13 O-ring 9-15 Gasket

2-11
 STRUCTURE (3/4)

12-4
12-19 12-5
12-3 12-6
12-91
12-10 12-2
12-92
12-17 12-8
11-4
12-7
11-17 11-5
11-3 11-6
12-18 11-101
11-2
11-102 10-8
12-13 11-9
12-12 10-9
11-8 10-12
12-14
10-3
10-61 10-11
12-1 12-16 12-15 11-13 10-151
12-3
10-62 10-10
11-1 10-14 10-152 10-22
11-11 10-161
12-11 10-13 10-162 10-17
11-15 10-2-1
11-16 10-2-2
11-3 11-12 11-14 10-18
11-17
11-7 10-5
11-6
11-5
10-21
10-1 10-18
10-4
10-20 10-19
10-73 10-22
10-72 10-71
10-75
10-74
10-8
55Z92MC04

10 Inlet assy-P1, P2 10-11 Pilot spring 11-4 Pilot cap (A) 12-4 Pilot cap (A)
10-1 Work block 10-12 Pilot cap (B2) 11-5 Wrench bolt 12-5 Wrench bolt
10-2 Spool (Ts) 10-13 Check poppet 11-6 Plain washer 12-6 Plain washer
10-2-1 Spool (Ts) 10-14 Check spring 11-7 Pilot cap (B1) 12-7 Check poppet
10-2-2 Spool plug bolt 10-15 Plug assy-PF3/8 11-8 Check poppet 12-8 Check spring
10-3 O-ring 10-151 Plug 11-9 Check spring 12-9 Plug assy
10-4 O-ring 10-152 O-ring 11-10 Plug 1 assy 12-91 Check plug 1 (M14)
10-5 Main relief valve 10-16 Plug-UNF5/16 11-101 Check plug 1 (M14) 12-92 O-ring
10-6 Plug 3 assy 10-161 Plug-UNF5/16 11-102 O-ring 12-10 Overload relief valve
10-61 Plug-PF3/8 10-162 O-ring 11-11 Overload relief valve 12-11 Holding valve
10-62 O-ring 10-17 Spring shim 11-12 Taper plug 12-12 Holding valve
10-7 Cap assy-Ts check 10-18 O-ring 11-13 O-ring 12-13 O-ring
10-71 Cap -Ts check 10-19 O-ring 11-14 O-ring 12-14 O-ring
10-72 Poppet check valve 10-20 O-ring 11-15 O-ring 12-15 O-ring
10-73 Check spring 10-21 Taper plug 11-16 O-ring 12-16 O-ring
10-74 Plug-PF1/8 10-22 Gasket 11-17 Gasket 12-17 Wrench bolt
10-75 O-ring 11 Travel section assy 12 Boom 1 section assy 12-18 Taper plug
10-8 Wrench bolt 11-1 Work block (Od) 12-1 Block boom 1 12-19 Gasket
10-9 Plain washer 11-2 Spool assy (R) 12-2 Spool assy
10-10 Spring seat 11-3 O-ring 12-3 O-ring

2-12
 STRUCTURE (4/4)

14-4
14-15 14-5
14-3 14-6
18
16 14-91 14-2
14-81
14-92 13-4
14-82
15 13-14
13-151 13-11 13-3 13-5
13-6
13-151 13-152
14-102 13-152
14-101 13-16
13-16
13-18
13-17

14-1 13-2
14-3 14-11
14-15
14-7 13-11
14-6
14-5
13-1
13-3 13-13 13-12
13-14
13-7
13-6
13-5

55Z92MC05

13 Bucket section assy 13-152 O-ring 14-81 Plug-PF1/2

13-1 Bucket block 13-16 Check spring 14-82 O-ring
13-2 Spool assy 13-17 Check poppet 14-9 Plug assy
13-3 O-ring 13-18 Check poppet 14-91 Check plug 1 (M14)
13-4 Pilot cap (A) 14 Arm 2 section assy 14-92 O-ring
13-5 Wrench bolt 14-1 Work block (Ae) 14-10 Plug assy
13-6 Plain washer 14-2 Spool assy 14-101 Plug-PF3/8
13-7 Pilot cap (B1) 14-3 O-ring 14-102 O-ring
13-11 Overload relief valve 14-4 Pilot cap (A) 14-11 O-ring
13-12 O-ring 14-5 Wrench bolt 14-15 Gasket
13-13 O-ring 14-6 Plain washer 15 End cover
13-14 Gasket 14-7 Pilot cap (B1) 16 Tie bolt
13-15 Plug assy 14-8 Plug-PF1/2 18 Nut
13-151 Check plug 1 (M14)

2-13
 Dozer

swing
Boom
Swing

(LH)
Travel
Arm
(2-WAY)

(RH)
Travel

Boom

Bucket
Breaker
b5
A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 b6 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1
b11 b10 Dr b9 Sb bW b2 b1
b4
3. HYDRAULIC CIRCUIT (boom swing, 2-way)

2-14
T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7 b6
b5
a9 Gauge Dr

55Z92MO02
 4. FUNCTION
1) CONTROL IN NEUTRAL FUNCTION

Pp
AI

T1
P3
T1
T

T
P2

Gauge
GAUGE
P1
T

T2 T2

555C92MC07

In neutral, spring sets the spool at the neutral position, the hydraulic oil from pumps flows to the
tank through the center bypass.

2-15
(1) P1
The oil discharged from the hydraulic pump flows into control valve P1 port, and then flows the
right side travel valve through the travel straight valve. In neutral, the oil flows through the center
bypass passage in the direction of right travel → boom 1 → bucket → arm 2 spool, and then
flows from the center bypass passage to the tank port T1 and T2.

(2) P2
The oil discharged from the hydraulic pump flows into control valve P2 port, and then flows the left
side travel valve through the travel straight valve. In neutral, the oil flows through the center
bypass passage in the direction of left travel → arm 1 → boom 2/breaker spool, and then flows
from the center bypass passage to the tank port T1 and T2.

(3) P3
The oil discharged from the hydraulic pump flows into control valve P3.
In neutral, the oil flows through the center bypass passage in the direction of swing → dozer
spool, and then flows from the center bypass passage to the tank port T1 and T2.

(4) Pp
When Pp port is applied with pilot pressure, the oil flows into the swing block through TS signal
passage and Ai signal passage independently via an orifice.
With the spool in neutral, the oil flows into the tank passage through the all section of the control
valve(except arm 2 section). As a result, the TS valve is not shifted and the auto idle signal
pressure is not raised.

2-16
2) EACH SPOOL OPERATION
(1) Travel operation (forward / backward)

B A

ARM1
Arm 1
T Breaker
BREAKER
Center bypass passage TS Ai
Tank
TANK

T
Check poppet
P2

Gauge
GAUGE
P1
T

Boom
BOOM⇒ bucket
BUCKET
⇒ Arm 2
ARM1
B A

T
555C92MC08

· During travel (forward/backward) operation, the pilot pressure from RCV is supplied into the travel
pilot port and shift the travel spool in the right direction.
· The hydraulic oil fluid from pump is entered center bypass passage of inlet block (P1, P2) and
then flows into the port of travel motor.
· The oil from the port A of travel motor flows into the main control valve and return to the hydraulic
oil tank through the tank passage.
· The TS signal passage is shut off by shifting of the travel spool, but it is connected with Ai signal
passage and drain to the hydraulic oil tank. As a result, the travel straight spool is not shifted.
· The Ai signal passage is connected with travel block through swing and dozer block and it is shut
off by shifting of the travel spool and then signal pressure of auto idle is raised.

2-17
(2) Boom operation
① Boom up operation (P1 and P2 summation)

Load check valve

B5 A5

a5

T
Parallel passage
TS Ai

a5

T
P2

Gauge
GAUGE
P1

a9

B9

A9

a9

T
555C92MC09

2-18
· During boom up operation, the pilot pressure from RCV is supplied into the port a9 and shift the
boom 1 spool in the left direction. The hydraulic oil fluid from pump P1 is entered P1 parallel
passage and then passes through the load check valve then flows into the port A9.
Following this, it flows into the head side of the boom cylinder.
At the same time the pilot pressure through the port a5 shifts the boom 2 spool. The hydraulic oil
fluid from pump P2 is entered P2 parallel passage and then passes through the load check valve
then flows into the port A5. The flows combine in hydraulic hoses and are directed to the cylinder
head side of boom cylinder.
The flow from rod side of the boom cylinder return to the boom 1 spool through the port B9.
There after it is directed to the hydraulic oil tank through the tank passage.
· The TS signal passage oil from the Pp port is drain to the hydraulic oil tank through the left/right
travel valve and the signal pressure is not raised.
· The Ai signal passage oil from the Pp port is shut off by shifting of the boom 1 spool and then
signal pressure of auto idle is raised.

2-19
② Boom down operation

TS Ai

P1 Gauge
GAUGE

b9
Load check valve

B9 A9

b9

T
Parallel passage
555C92MC10

· During the boom lowing operation, the pilot pressure from RCV is supplied to the port b9 and
shift the boom 1 spool in the right direction.
The hydraulic fluid from the pump P1 enters the parallel passage and is directed to the port B9
through the load check valve. Following this, it flows into the rod side of the boom cylinder.
The return flow from the head side of the boom cylinder returns to the boom 1 spool through the
port A9. Thereafter it is directed to the hydraulic oil tank through tank passage.
· The hydraulic oil flow from the Pp port is same as the boom up operation.

2-20
(3) Bucket operation
① Bucket roll in operation

TS Ai

Gauge
GAUGE
P1

b10

B10 A10

b10

T
Load check valve
555C92MC11

· During the bucket roll in operation, the pilot pressure from RCV is supplied to port b10 and shift
the bucket spool in the right direction.
The hydraulic fluid from pump P1 entered P1 parallel passage and is directed to the port B10
through the load check valve.
Following this, it flows into the head side of the bucket cylinder.
The return flow from the rod side of the bucket cylinder returns to the bucket spool through the
port A10. Thereafter it is directed to the hydraulic oil tank through the tank passage.
· The TS signal passage oil from the Pp port is drain to the hydraulic oil tank through the left/right
travel valve and the signal pressure is not raised.
· The Ai signal passage oil from the Pp port is shut off by shifting of the bucket spool and then
signal pressure of auto idle is raised.

2-21
② Bucket roll out operation

TS Ai

P1 Gauge
GAUGE

a10

B10 A10

a10

555C92MC12

· In case of the bucket roll out operation, the operation is similar.

· The hydraulic oil flow from the Pp port is same as the bucket in operation.

2-22
③ Bucket load check valve operation

pp2

PLUNGER
Plunger

ORIFICE
Orifice

555C92MC13

· This function is used to speed up of the boom or arm by reducing the bucket speed when bucket
operation with boom or arm operation simultaneously.
· When the signal pressure flows into port pp2, the plunger is shifted and orifice is made.
· The hydraulic oil from the port P1 flow into bucket cylinder via the orifice and then the speed of
bucket cylinder is slow down.
Accordingly, the much fluid from the port P1 is supplied other cylinder than the bucket cylinder.

2-23
(4) Arm operation
① Arm roll in operation (P1 and P2 summation)

B6 A6

b6

T TS Ai

P2

P1 GAUGE
Gauge

b11

b11

555C92MC14

2-24
· During arm roll in operation the pilot pressure from the RCV is supplied to the port b6 and b11
and shifts arm 1 spool and arm 2 spool in the direction.
The hydraulic oil from the pump P2 flows into the arm cylinder head side through P2 parallel
passage, the load check valve and the port B6.
At same time, the hydraulic fluid from the pump P1 flows into the arm summation passage in
arm 1 spool through the arm 2 spool. Then it entered the arm cylinder head side with hydraulic
fluid from arm 1 spool.
· The TS signal passage oil from the Pp port is drain to the hydraulic oil tank through the left/right
travel valve and the signal pressure is not raised.
· The Ai signal passage oil from the Pp port is shut off by shifting of the arm spool and then signal
pressure of auto idle is raised.

2-25
② Arm roll out operation

B6 A6

a6

T TS Ai

a6

P2

P1 Gauge
GAUGE

a11

a11

555C92MC15

· During arm roll out operation the pilot pressure from RCV is supplied to the port a6 and the a11
and shifts arm 1 spool and arm 2 spool in the left direction.
The hydraulic fluid from pump P2 flows into arm 1 spool through the parallel passage. Then it
enters into the arm cylinder rod side through the load check valve and the port A6.
At same time, the hydraulic oil from the pump P1 flows into the arm summation passage in arm
1 spool through the arm 2 spool.
The return flow from the arm cylinder head side returns to the hydraulic tank through the port B6
the arm1 spool and tank passage.
· The hydraulic oil flow from the Pp port is same as the arm roll in operation.

2-26
(5) Swing operation

B1 A1

Pp
Ai

Swing
SWING
a1

P3

555C92MC16

· The pilot pressure from the RCV is supplied to the a1 and shift the swing spool in left direction.
The hydraulic fluid from pump P3 flows into swing spool through the parallel passage. Then it is
directed to swing motor through the port A1. As a result, swing motor turns and flow from the
swing motor returns to the hydraulic oil tank through the port B1, swing spool and the tank
passage.
In case of swing left operation, the operation is similar.
· The TS signal passage oil from the Pp port is drain to the hydraulic oil tank through the left/right
travel valve and the signal pressure is not raised.
· The Ai signal passage oil from the Pp port is shut off by shifting of the swing spool and then
signal pressure of auto idle is raised.

2-27
(6) Travel straight function

Parallel passage
P2 P1

Center bypass passage

Pp
Ai

Sa
P3

b7

P2

P1 Gauge
GAUGE
b8

Cut off
BOOM orwhen
ARMthe
or boom,
BUCKET
arm and bucket
CUT operation
555C92MC17

2-28
· This function keeps straight travel in case of simultaneous operation of other actuators (boom,
arm, bucket, swing, woodgrab) during a straight travel.
① During travel only :
The hydraulic fluid of the pump P1 is supplied to the travel motor and the pump P2 is supplied to
the other motor.
Thus, the machine keep travel straight.
② The other actuator operation during straight travel operation.
When the other actuator spool(s) is selected under straight travel operation, the straight travel
spool is moved.
Some of hydraulic fluid from pump P1 and P2 is supplied to the travel motors through parallel
passage and the other hydraulic fluid is supplied to the actuator(s) through center bypass
passage via orifice passage.
Thus, the machine keeps straight travel.
· The fluid flows into P3 pilot port Sa through the gauge port and the spool is shifted. As a result,
the fluid of P3 pump is combined with the boom, arm and bucket and then the actuators speed
up.

2-29
(7) Holding valve operation
① Holding operation
Actuator port Check Spring Drain port Pilot port Pilot piston chamber
A9
Dr xb9

Boom holding
valve

Boom 1 a9
spool

Plug Poppet Poppet seat Piston A Spring B Piston B

55W72MC16

At neutral condition, the pilot piston chamber is connected to drain port through the pilot port.
And the piston "B" is supported with spring "B".
Also, the pressured fluid from actuator entered to inside of the holding valve through the periphery
hole of check, crevice of the check and the plug and the periphery hole of plug.
Then, this pressured oil pushed the poppet to the poppet seat and the check to the seat of body.
So the hydraulic fluid from actuator is not escaped and the actuator is not moved.

② Release holding operation

Actuator port Check Spring Drain port Pilot port Pilot piston chamber
A9
Dr xb9

Boom holding
valve

Tank passage

Boom 1 a9
spool

Plug Poppet Poppet seat Piston A Spring B Piston B

55W72MC17

The pilot pressure is supplied to the pilot port for release holding valve and shifts the piston "B" in
the left direction against the spring "B", and shifts the poppet in the left direction through piston "B"
and piston "A" against spring "B" and shifts the spool in the left side.
At same time, the return fluid from actuator returns to the drain port through the periphery hole of
check, crevice of the check and the plug, the periphery hole of the plug, in side of holding valve,
crevice of the poppet and the poppet seat, the periphery hole of the poppet seat, crevice of socket
and spool and internal passage of spool.
When the poppet is opened, pressure of inside of holding valve is decreased and the return fluid from
actuator returns to the tank passage through the notch of spool.

2-30
GROUP 3 SWING DEVICE

1. STRUCTURE
Swing device consists swing motor, swing reduction gear.
1) SWING MOTOR
Swing motor include mechanical parking valve, relief valve, make up valve and time delay valve.

Outlet shaft Oil level gauge Time delay valve Mu GA GB Dr

Gear oil filling port(PT1/2) SH PG A B

5592SM01

Port Port name Port size

SH
A Main port SAE PF 1/2
PG B Main port SAE PF 1/2
Dr Drain port PF 3/8
Air vent Mu Make up port PF 3/4
PG Brake release stand by port PF 1/4
SH Brake release pilot port PF 1/4
Dr
GA,GB Gauge port PF 1/4
GA GB

A Mu B

Hydraulic circuit

2-31
4 6 8 3 14 29 30 16 22 33 34 41,42 19 20,21 35 36 38 37

1 2 5 7 10 9 11 26 27 28 13 15 12 32 31 17 24 25 39 40 18

555K2SM03

1 Body 15 Taper bearing 29 O-ring

2 Oil seal 16 Valve plate 30 Spring
3 Cylinder block 17 Relief valve assy 31 Time delay valve
4 Shaft 18 Socket bolt 32 Socket bolt
5 Taper bearing 19 Plug 33 Plug
6 Bushing 20 Plug 34 O-ring
7 Shoe plate 21 O-ring 35 Valve
8 Spring 22 Shim 36 Spring
9 Set plate 23 Plug 37 Plug
10 Piston shoe assy 24 Back up ring 38 O-ring
11 Ball guide 25 O-ring 39 O-ring
12 Rear cover 26 Friction plate 40 Back up ring
13 Pin 27 Plate 41 Name plate
14 O-ring 28 Parking piston 42 Rivet

2-32
2) REDUCTION GEAR

2 3 4 5 6 31 26 28 30 29 7 8

24
32

23
22

21

9
25

1 16 15 14 13 27 20 11 17
55W72SM02

1 Shaft 12 Carrier assy 2 23 Bushing 1

2 Bearing cover 13 Dowel pin 24 Thrust washer 1
3 Taper roller bearing 14 Collar 25 Thrust washer 3
4 Case 15 Plug 26 Thrust washer 2
5 Oil seal 16 Plug 27 Carrier assy 2
6 Taper roller bearing 17 Cover 28 Planet gear 2
7 Sun gear 2 18 Pipe 29 Pin 2
8 Socket bolt 19 Level gauge 30 Bushing 2
9 Sun gear 1 20 Carrier assy 1 31 Spring pin
10 Carrier assy 1 21 Planet gear 1 32 Snap ring
11 Ring gear 22 Pin 1 33 Thrust washer 4

2-33
2. FUNCTION
1) ROTARY PART
When high pressurized oil enters a cylinder through port(a), which is the inlet of balance plate(16),
hydraulic pressure acting on the piston causes axial force F. The pressure force F works via the
piston(10) upon the return plate(9) which acts upon the swash plate(7) via an hydrostatic bearing.
Force F1 perpendicular to swash plate(7) and force F2 perpendicular to cylinder center.
Being transferred to the cylinder block(3) through piston, force F2 causes rotational moment at
surroundings of cylinder.
Since cylinder block has 9 equidistantly arrayed pistons, rotational torque is transmitted to cylinder
shaft in order by several pistons connected to the inlet port of high pressurized oil. When the
direction of oil flow is reversed, rotational direction of cylinder is also reversed. Output torque is
given by the equation.
p×q F
T= , q=Z·A·PCD·tanθ, F1 = , F2=F tanθ , S=PCD×tanθ
2Л COSθ
Where p : Effective difference of pressure (kgf/cm2)
q : Displacement (cc/rev)
T : Output torque (kgf·cm)
Z : Piston number (9EA)
A : Piston area (cm2)
θ: Tilting angle of swash plate (degree)
S : Piston stroke (cm)

Low High
pressure oil pressure oil

F1 F1
F

16

7 9 10 3 R5572SF35

2-34
2) MAKE UP VALVE
(1) Outline
The safety valve portion consists of a
check valve and safety valve.
(2) Function
When the swing is stopped, the output
circuit of the motor continues to rotate
because of inertia. For this reason, the
pressure at the output side of the motor
becomes abnormality high, and this will
damage the motor. To prevent this, the oil
causing the abnormal hydraulic pressure
Dr
is allowed to escape from the outlet port
(high-pressure side) of the motor to port
Mu, thereby preventing damage to the
motor. A Mu B
Compared with a counterbalance valve,
there is no closed-in pressure generated
at the outlet port side when slowing down
the swing speed. This means that there is
no vibration when slowing down, so the 555C92SF36

ease of swing control is improved.

(3) Operation
① When starting swing
When the swing control lever is operated
to left swing, the pressurized oil from the
pump passes through the control valves
and is supplied to port B. Because of
this, the pressure at port B rises, staring
torque is generated in the motor, and the
motor starts to rotate. The oil from the
outlet port of the motor passes from port
A through the control valve and returns to
the tank.

2-35
② When stopping swing
· When the swing control lever is returned
to neutral, no pressurized oil is supplied
from the pump to port B.
The return circuit to the tank is closed by SH
the control valve. So the oil from the
outlet port of the motor increases in PG
pressure at port A. Resistance to the
rotation of the motor is created, and the
brake starts to act.
· The pressure at port A rises to the set
pressure of make up valve a, and in this
way, a high brake torque acts on the Dr
motor, and the motor stops. GA GB
· When make up valve a is being actuated,
the relief oil from make up valve a and A Mu B
the oil from port Mu pass through check
valve CB and are supplied to port B.
This prevents cavitation from forming at
R5572SF32
port B.

2-36
3) RELIEF VALVE

2 1 Body
2 Plug
3
3 O-ring
4 Plunger
10 5 Piston
6 Spring
5 7 Spring seat
8 Seat
9 O-ring
9 10 Nut

8
555C92SF37

(1) Construction of relief valve

The valve casing contains two cartridge type relief valves that stop the regular and reverse
rotations of the hydraulic motor. The relief valves relieve high pressure at start or at stop of swing
motion and can control the relief pressure in two steps, high and low, in order to insure smooth
operation.

(2) Function of relief valve

Figure illustrates how the pressure acting P P=pressure, T=time
on the relief valve is related to its rising PS
process. Here is given the function, 4
referring to the figure following page.
P1 3

T
1
29072SM05

2-37
4) BRAKE SYSTEM
(1) Control valve swing brake system
This is the brake system to stop the swing motion of the excavator during operation.
In this system, the hydraulic circuit is throttled by the swing control valve, and the resistance
created by this throttling works as a brake force to slow down the swing motion.

Work Deceleration Stop

A B A B A B

MCV MCV MCV

MCV A, B opened MCV A, B throttled MCV A, B closed

210-7 2-48(1)

(2) Mechanical swing parking brake system

The mechanical swing parking brake system is installed to prevent the upper structure from
swinging downhill because of its own weight when the excavator is parked on a slope since it
completely eliminates the hydraulic drift of swing motion while the excavator is on a slop, work
can be done more easily and safely.

① Brake assembly
Circumferential rotation of separate plate
(27) is constrained by the groove located
at casing (1). When housing is pressed
down by brake spring (30) through
friction plate (26), separate plate (27)
and brake piston (28), friction force 30
occurs there.
Cylinder (3) is constrained by this friction 28
force and brake acts, while brake 27
releases when hydraulic force exceeds
26
spring force.
3
1 R5572SF38

1 Casing 27 Separate plate

3 Cylinder 28 Brake piston
26 Friction plate 30 Brake spring

2-38
② Operating principle
a. When the swing control lever (1) is set to the swing position, the pilot oil go to the swing control
valve (2) and to SH of the time delay valve (3) via the shuttle valve (4), this pressure move
spool (5) to the leftward against the force of the spring (8), so pilot pump charged oil (P4) goes
to the chamber G.
This pressure is applied to move the piston (28) to the upward against the force of the spring
(30). Thus, it releases the brake force.

3
30

5
28 G
SH

1 Swing control lever

2 Swing control valve (MCV)
3 Time delay valve
12
4 Shuttle valve
5 Spool P4
8 Spring
12 Gear pump
2 2
28 Brake piston
30 Brake spring 4
R5572SF39

2-39
b. When the swing control lever (1) is set the neutral position, the time delay valve (3) shifts the
neutral position and the pilot oil blocked chamber G.
Then, the piston (28) is moved lower by spring (30) force and the return oil from the chamber G
is drain.

3
30

28 G
SH

1 Swing control lever

2 Swing control valve (MCV)
3 Time delay valve
4 Shuttle valve
28 Brake piston
30 Brake spring P4

2 2
4
R5572SF40

2-40
 GROUP 4 TRAVEL DEVICE (TYPE 1)

1. CONSTRUCTION
Travel device consists travel motor and gear box.
Travel motor includes brake valve, parking brake and high/low speed changeover mechanism.

A Travel motor Reduction gear Supply port PT 3/8

FILL

LEVEL

a2 a1

DRAIN

Check port PT 3/8 Drain port PT 3/8

Ps

P2 P1
T2 T1

VIEW A

5592TM01

10 36 83

Port Port name Port size

17 33 83

P1 Main port PF 1/2

T2 T1
a1
P2 Main port PF 1/2
a2
a1,a2 Gauge port PT 1/4
PS
T1,T2 Drain port PF 3/8
Ps 2 speed control port PF 1/4

P2 P1

Hydraulic circuit

2-41
1) BASIC STRUCTURE

Reduction gear

Hydraulic motor
Brake valve
Parking brake
High/low speed
changeover
mechanism

Control valve

Pump

5592TM02

2-42
2) STRUCTURE

86 85
36 37 39,40 38 58 28 29 30 31 56 57 24 23 22 21 20 19 18 17 10 9 16 4 8 64 1 5 59 82 83

69

70
73
72
52,53 87,88 71
54

A A 79

78

80
47 48 50 51 49
74
75
81
77
A-A

55 84 26 41 42 46 45 43 44 32 33 24 34 27 35 25 14,13,12,11 63 15 60 62 61 6,7 2 65 3 67 68 66 76

555K2TM03

1 Shaft casing 16 Ball guide 31 Snap ring 46 Relief valve assy 61 Steel ball 76 Planetary gear
2 Expand 17 Set plate 32 Check 47 Steel ball 62 Plug 77 Needle bearing
3 Oil seal 18 Piston kit 33 Spring 48 Check seat 63 Floating seal 78 Drive gear
4 Shaft 19 Friction plate 34 Seat 49 Plug 64 Nut 79 Thrust plate
5 Bearing 20 Parking plate 35 Snap ring 50 Plug 65 Washer 80 Ring gear cover
6 Swash piston kit 21 Parking piston 36 Check 51 O-ring 66 Collar 81 Plug
7 Spring 22 O-ring 37 Spring 52 Plug 67 Planetary gear 82 O-ring
8 Swash steel ball 23 O-ring 38 Plug 53 O-ring 68 Needle bearing 83 Wrench bolt
9 Swash plate 24 O-ring 39 O-ring 54 Ball bearing 69 Plate 84 Orifice
10 Shoe plate 25 O-ring 40 Back up ring 55 Pin 70 Bolt 85 Back up ring
11 Cylinder block 26 Rear cover 41 Main spool kit 56 Valve plate 71 Sun gear 86 Back up ring
12 Spring seat 27 Plug 42 Spring seat 57 Spring plate 72 Snap ring 87 Name plate
13 Spring 28 Spool 43 Spring 58 Wrench bolt 73 Carrier 88 Rivet
14 Snap ring 29 Spring 44 Plug 59 Ring gear 74 Spring pin
15 Pin 30 Stopper 45 O-ring 60 Angular bearing 75 Collar

2-43
2. PRINCIPLE OF DRIVING
1) GENERATING THE TURNING FORCE
The high hydraulic supplied from a hydraulic pump flows into a cylinder (11) through valve casing of
motor (26), and valve plate (56).
The high hydraulic is built as flowing on one side of Y-Y line connected by the upper and lower
sides of piston (18).
The high hydraulic can generate the force, F1 = P×A (P : Supplied pressure, A : water pressure
area), like following pictures, working on a piston.
This force, F1, is divided as N1 thrust partial pressure and W1 radial partial pressure, in case of the
swash plate (9) of a tilt angle, α.
W1 generates torque, T = W1+R1, for Y-Y line connected by the upper and lower sides of piston as
following pictures.
The sum of torque (ΣW1×R1), generated from each piston (4~5pieces) on the side of a high
hydraulic, generates the turning force.
This torque transfers the turning force to a cylinder (11) through a piston; because a cylinder is
combined with a turning axis and spline, a turning axis rotates and a turning force is sent.

Y
Cylinder A Piston

W1
R1 W1
N1
f1 P
0 F1

Drive shaft

High Low
pressure pressure
Y

5592TM03

2-44
2) WORKING OF RELIEF VALVE
Relief valve carries on two functions of followings.
(1) It standardizes a pressure in case of driving a hydraulic motor ; bypasses and extra oil in a motor
inlet related to acceleration of an inertia to an outlet.
(2) In case of an inertia stopped, it forces an equipment stopped, according to generating the
pressure of a brake on the projected side.
Room A is always connected with port A of a motor. If the pressure of port is increased, press
poppet B. And if it is higher than the setting pressure of a spring, the oil of an hydraulic flows from
room A to port B, because poppet A is detached from the contact surface of seat A.

11 12 10 5 9 13 14 15 18 1 17

Port A Port B

Room A Seat A Poppet A 8 7 6 3 4 2 16

5592TM04

2-45
3) WORKING OF BRAKE
Brake operates the pressure supplied through SPOOL (simultaneous peripheral operation online)
installed in valve casing (26) to the part of parking piston (21) and releases a brake.
When the pressure does not work, the brake always runs.
The force of a brake is generated by the frictional force among a plate (20), brake piston (21) and a
cylinder block (11) that is connected through spline which are fixed by shaft casing (1) with friction
plate (19).
When a pressure does not work on the part of piston, brake spring presses brake piston; oil in a
brake room flows into the drain of a motor through an orifice; in that time, brake piston compresses
a frictional plate (19) and a detached plate in the middle of shaft casing and brake piston according
to the force plate springs (57); finally, it makes a frictional force.
This frictional force helps the brake fixing a turning axis (3) connected by a cylinder and spline
operated.

57 18 21 20 19 1 11 4

555K2TM06

2-46
4) COUNTERBALANCE VALVE
Av port is connected into a hydraulic pump and Bv port is into a tank. Hydraulic pump supplying oil
is come into Av → Cv room. In accordance with spring force (43) that is working on the spool's
side it moves to the spool (41) on the right side which is medium position and that time motor is
turning.
When the spool (41) is come back to the medium position that time hydraulic motor is stopped.
In accordance with spool's returning speed and shape control the working oil that is returning from
hydraulic motor smoothly stopping the motor.

Av Bv

Cv

84 41 42 45 43 44

555K2TM07

2-47
4) HIGH/LOW SPEED CHANGEOVER MECHANISM
(1) At low speed-at pilot pressure of less than 10 kgf/cm2 (0.98 Mpa
Mpa)

A 28 29 9 Holder flange

B q1

Spring

Case of motor
C

5592TM05

When no pilot pressure is supplied from port (A) at a pressure of 10 kgf/cm2 (0.98 Mpa) or less,
spool (28) is pressed toward the left by the force of spring (29), the pressurized oil supply port B is
shut off, and oil in chamber (C) is released into the motor case via spool (28).
Consequently, swash plate (9) is tilted at a maximum angle (θ1°) and the piston displacement of
hydraulic motor becomes maximum, thus leading to low-speed rotation.

(2) At high speed-at pilot pressure of 10 kgf/cm2 (0.98 Mpa

Mpa)) or more

A 28 29 9 Holder flange

b
B
q1

Spring

Case of motor
C

6
5592TM06

When a pilot pressure is supplied from port (A) at a pressure of 10 kgf/cm2 (0.98 Mpa) or more, the
pressure overcomes the force of spring (29) and spool (28) is pressed toward the right. The
pressurized oil at supply port (B) is then introduced into chamber (C) via spool (28).
Piston (6) pushes up swash plate (9) until it touches side (b) of the holder flange.
At this time, swash plate (9) is tilted at a minimum angle (θ2°) and the piston displacement of
hydraulic motor becomes maximum, thus leading to high-speed rotation.

2-48
2. REDUCTION GEAR
1) FUNCTION
The reduction gear unit consists of a combination of simple planetaly gear mechanism.
This mechanism reduce the high speed rotation from the hydraulic motor and convert it into low
speed, high torque to rotate the hub (or case), which in turn rotates the sprocket.
2) OPERATING PRINCIPLE
Shaft → Drive gear → Planetary Gear R → Housing
→ Holder → Sun gear → Planetary Gear F →Rotation of Housing

Holder flange Shaft

Planetary gear(F)

Planetary gear(R)

Drive gear

Holder
Holder flange Sun gear Housing

5592TM07

Reduction ratio = (Housing Teeth/Drive Gear Teeth + 1)

×(Housing Teeth/Sun Gear Teeth + 1) - 1.

2-49
 TRAVEL DEVICE (TYPE 2, MACHINE SERIAL NO. : #0812-)

1. CONSTRUCTION
Travel device consists travel motor and gear box.
Travel motor includes brake valve, parking brake and high/low speed changeover mechanism.

Travel motor Reduction gear Supply port PF 1/2

a2 a1 Relief valve Check port PF 1/2 Drain port PF 1/2

Pa Pb

HX60A2TM50E

Ta Ps Tb
Port Port name Port size
VIEW A
Pa Main port PF 1/2
Pb Main port PF 1/2
a1,a2 Gauge port PT 1/4
a2 Tb Ta
Ta,Tb Drain port PF 3/8
Ps 2 speed control port PF 1/4
Pa
MIN

Ps
MAX

Pb

a1 B/R
Hydraulic circuit

2-49-1
2) STRUCTURE
307 301 305 406 303 118 106 119 109 618 112 113 617 622 115 410 625 611 605 615 613
402
408
103
624
104
501 614
507
403 411 603
309 405
620
504 306
616
505 407
510 508 606

509 116 602

130 201
608
502
132 628
131 304
607
129 304
621
125 506
627
133 108
610
134 308
629

128 405 630

127
310 619
126
117 623
122
302
401 609 HX60A2TM51
121 124,123135 136 30 432 503 433 302 405 405 409 401 114 404 202 107 101 105 102 626 111 626 604 110 511 601

30 Relief valve assy 118 Friction plate 137 O-ring 405 O-ring 510 Cap 618 Floating seal kit
101 Piston 119 Separator plate 201 Valve casing 406 O-ring 511 Swash piston spring 619 O-ring
102 Shoe 121 Plug 202 Casing 407 Name plate 601 Housing 620 Spring pin
103 Drive shaft 122 Guide 301 Socket bolt 408 Oil seal 602 Cover 621 Snap ring
104 Cylinder block 123 O-ring 302 Plug 409 Back up ring 603 Holder 622 Steel ball
105 Spherical bushing 124 Back up ring 303 Drain plug 410 Snap ring 604 Ring nut 623 Socket bolt
106 Set plate 125 Sleeve 304 NPTF plug 411 O-ring 605 Planetary gear F 624 Bolt
107 Cylinder spring 126 Piston 305 Dust plug 432 Seat 606 Planetary gear R 625 Plug
108 Valve plate 127 O-ring 306 Dust plug 433 Seat casing 607 Sun gear 626 Plug
109 Swash plate 128 Back up ring 307 Dust plug 501 Main spool 608 Ring nut 627 Side plate A
110 Swash piston 129 Poppet 308 2 speed plug 502 2 speed spool 609 Thrust plate F 628 Side plate B
111 Swash shoe 130 Poppet seat 309 Set plug 503 Steel ball 610 Thrust plate R 629 Plug
112 Pivot 131 O-ring 310 Restrictor 504 Plunger 611 Thrust washer 630 O-ring
113 Pivot pin 132 Back up ring 311 Plug 505 Main spool spring 613 Collar
114 Brake piston 133 Spring seat 401 O-ring 506 2 speed spool spring 614 Inner race
115 Roller bearing 134 Spring 402 O-ring 507 Spring pin 615 Needle bearing
116 Ball bearing 135 Adjust screw 403 O-ring 508 Pin 616 Needle bearing
117 Brake spring 136 Hex nut 404 O-ring 509 Spring cap 617 Angular bearing

2-49-2
2) MAJOR COMPONENT
This product is only composed of hydraulic motor. Reduction parts are not composed.
This hydraulic motor is variable swash plate axial piston motor. It is composed of 4 parts.
- Rotary part which makes rotatory power
- Traveling brake valve part
- Parking brake part
- Switching the tilting angle part (auto 1/2 speed control part)

a2 Tb Ta

Pa

MIN

Ps

MAX

Pb

a1 B/R
Auto 1 speed specification

Counterbalance Relief valve part

valve part

Traveling brake part Switching the Rotary Parking

tilting angle part part brake part

559A2TM52

2-49-3
3) BASIC STRUCTURE

Rotary part

Relief valve part

Counterbalance valve part

Check valve part

Parking brake part

Switching the tilting angle part

559A2TM53

2-49-4
2. WORKING PRINCIPLE
1) HYDRAULIC MOTOR SECTION
When high pressure oil passes from pump through the inlet port of the valve plate(108) and flows
into the cylinder (104) as shown in figure, the oil pressure acts upon the piston (101) to generate
the axial force "F". The force "F" acts on the swash (109) plane in the axial direction.
F = P×A (P : Pressure, A : Area)
The swash plate (109) is fixed with an inclination angle of α to the axis of the drive shaft (103).
Therefore, this force is divided into two vector forces through the shoe (102) : namely, the force F1
vertical to the swash plate (109) and the force F2 perpendicular to the drive shaft (103).
Because of the force "F2", piston (101) slides along with shoe (102) in the direction of the arrow in
Figure. This force "F2" is transmitted to the cylinder block (104) via the piston (101) and generates
a couple of forces which turn the output drive shaft (103).
In the cylinder block (104) nine pistons are equispaced and the pistons connected to the high
pressure oil inlet ports give their rotating torque to the output shaft sequentially.
When the oil inflow/outflow direction are reversed, the rotating direction of the output shaft is
reversed.
The theoretical output torque "T [N/m]" is given by the flowing.

P×q
T= P : Effective pressure difference (Mpa), q : Displacement per revolution (cm3)
2π

High pressure Low pressure

(TDP)

F2
A F1 F2

P F
F2 r1

F2

F2
(BDP)
559A2TM54

2-49-5
2) TRAVELING BRAKE VALVE
Traveling brake valve is composed of relief valve, counterbalance valve and check port A is
connected with hydraulic pump and port B is connected with tank.
(1) In case of traveling
When the compressed oil, which is supplied along the inlet port, exceeds certain pressure, it
pushes cap (509). And, it is supplied to one side of the casing (202).
It is trying to rotate the hydraulic motor.
At the same time, the compressed oil enters the chamber {a} along small hole {b} of main spool
(501) and acts on the face of main spool (501). After increasing pressure of oil, when this
pressure exceeds the spring elasticity force of main spool spring (505), main spool (501), which is
held in neutral by the spring elasticity force, moves to the right.
The inlet side and outlet side that was blocked by main spool (501) during stop connect with each
other. So, return oil returns to the oil tank, so the hydraulic motor rotates.
Furthermore as main spool (501) moves, the path of parking brake (port P) is connected.
When compressed pressure, which enter to (port P) , becomes brake release pressure, it
operates brake piston (114) and parking brake is released.
If the direction of oil inlet is reversed, main spool (501) and check valve motion is reversed. Output
rotation direction is also reversed.

Port A Port B
a 501

b 505

509 Port P

114

559A2TM55

2-49-6
(2) In case of stop
If the pressure supplied along the port to the inlet breaks while traveling, the pressure applied to
the section of the main spool (501) is removed. Therefore, the main spool (501), which was
pushed to the right, returns to neutral due to the spring elasticity force of the main spool spring
(505).
The rotary part continues to rotate under inertia even if pressure is lost from the inlet side. As the
main spool (501) returns to neutral, the connected inlet and outlet sides of the flow path are
blocked. Since there is no escape location for the returned oil, the pressure of the exit side (D) is
raised.
The returned oil with increased pressure enters the relief valve (30). if it exceeds the set pressure
of the relief valve (30), operates the relief valve (30). The flow path from the outlet side {D} to the
inlet side {C} is connected. And it controls the pressure on the outlet side.
At the same time it prevents cavitation on the inlet side.
It also relieves the shock during stop while controlling pressure on the outlet side with relief valve
(30) in two stages, and apply soft braking to the hydraulic motor by applying an orifice and notch
on the main spool (501).

Port A Port B
a 501

b 505

509 Port P

Characteristic of relief valve

Pressure P

114
Shock
protection
c d

Time t

559A2TM56

2-49-7
(2) In case of stop
If the pressure supplied along the port to the inlet breaks while traveling, the pressure applied to
the section of the main spool (501) is removed. Therefore, the main spool (501), which was
pushed to the right, returns to neutral due to the spring elasticity force of the main spool spring
(505).
The rotary part continues to rotate under inertia even if pressure is lost from the inlet side. As the
main spool (501) returns to neutral, the connected inlet and outlet sides of the flow path are
blocked. Since there is no escape location for the returned oil, the pressure of the exit side (D) is
raised.
The returned oil with increased pressure enters the relief valve (30). if it exceeds the set pressure
of the relief valve (30), operates the relief valve (30). The flow path from the outlet side {D} to the
inlet side {C} is connected. And it controls the pressure on the outlet side.
At the same time it prevents cavitation on the inlet side.
It also relieves the shock during stop while controlling pressure on the outlet side with relief valve
(30) in two stages, and apply soft braking to the hydraulic motor by applying an orifice and notch
on the main spool (501).

Port A Port B
a 501

b 505

509 Port P

Characteristic of relief valve

Pressure P

114
Shock
protection
c d

Time t

559A2TM56

2-49-8
(3) In case of overrun
Overrun is when the excavator's speed is increased by the it's gravity (inertia), such as when an
excavator is going downhill, causing the hydraulic motor to rotate above the supply flow of the
hydraulic pump.
In the case of overrun, the compressed oil on the inlet side is entered into the rotary and the
pressure on the inlet side is reduced. Therefore, due to the spring elasticity force of the main
spool spring (505), main spool (501) returns to neutral, as it stops.
At the same time, back pressure is generated due to the throttle (notch of main spool) between
the outlet side (D) and the outlet port (port B) passage. The back pressure controls the return
speed of the main spool (501) and hydraulic motor, which is about to be rotated by inertia forces,
is decelerated. The operation of main spool (501) is controlled by the notch of main spool (501)
and throttle. So motor smoothly moves according to the supply flow rate.

Port A Port B
a 501

b 505

509 Port P Notch

114
Throttle
c d

559A2TM57

2-49-9
3) PARKING BRAKE
The parking brake is wet-type multiple disk brakes. It is a negative brake system which is released
when the brake release pressure enters the brake piston chamber.
The internal structure of parking brake is shown in figure. Friction plate (118) and separator plate
(119) are alternately stacked, and acting on springs to produce brake torque with friction forces.
It prevents not only the braking of excavators but also overrun or slip during traveling and stopping
on the slip.

Brake piston chamber (c)

Brake piston (114)

Separator plate (119)

Friction plate (118)

Brake spring (117)

559A2TM58

(1) In case traveling

The cylinder block (104) is connected to the drive shaft (103) with spline. In addition, the
separator plate (119) is restrained from circumferentially-rotating by an arc groove cut on the
casing (202).
The friction plate (118) which is connected to the arc groove cut on cylinder block (104), can be
rotated along the cylinder block (104).
When pressurized oil is supplied from the inlet side during traveling operation, the blocked flow
path is opened. so pressurized oil is supplied to the brake piston chamber (c) that is comprised
inside brake piston (114) and casing (202).
If the hydraulic force F4 of the brake piston chamber (c) is greater than the spring elasticity force
F3 of the brake spring (117), then brake piston (114) move to valve casing. (above brake release
pressure)
F3 = k x n , k : Spring constant, x : Spring stroke, n : Number of spring brake
F4 = P × (A1 - A2), P : Main pressure of input, (A1 - A2) : Area difference of brake piston
The force that friction plate (118) and separator plate (119) pressurize the casing (202)
disappears and the brake releases.
So, the hydraulic motor can rotate.

2-49-10
(2) In case of stop
If the pressurized oil supplied by the inlet is cut off during stop, the pressurized oil supplied to the
brake piston chamber (c) will also be blocked. (below brake release pressure)
If the spring elasticity force F3 of the brake spring (117) is greater than the hydraulic force F4 of
the brake piston chamber (c), then brake piston (114) move to casing by spring elasticity force.
The hydraulic oil of the brake piston (114) is drained through the throttle. Therefore brake piston
(114) smoothly operates.
F3 < F4
F3 = k x n , k : Spring constant, x : Spring stroke, n : Number of spring brake
F4 = P × (A1 - A2), P : Main pressure of input, (A1 - A2) : Area difference of brake piston
When the brake piston (114) pushes casing (202) by the brake spring (117), the frictional force
appears between friction plate (118), casing (202), separator plate (119) and brake piston (114).
parking brake appears by friction force and spring elasticity of the brake spring (117), the drive
shaft (103) is constrained.

A1

A2

Parking brake (run)

Parking brake (stop)

559A2TM59

2-49-11
4) 1/2 SPEED SWITCHING OPERATION (AUTOMATIC 1/2 SPEED CONTROL PART)
(1) Low speed traveling
If pilot pressure is not supplied on pilot port (port S), 2 speed spool (502) is pushed in the
direction of the port S by spring elasticity of 2 speed spool spring (506).
As a result, the compressed oil from the high pressure selection check valve (E) is not connected
to the swash piston chamber (g).
The compressed oil of swash piston chamber{g} is drained through the flow path of 2 speed
spool chamber (f).
So, the compressed oil from the high pressure selection check valve (E) is not connected to the
swash piston chamber {g}. As a result, the swash plate (109) will be the maximum angle α and
the stroke of the piston (101) will be long. So, a large amount of oil will be required for rotating the
motor once.
Therefore the displacement of the hydraulic motor is maximized and rotated at low speed.

Port A Port B Port S

Ps

Face Y
502

109 20

9
f

E
506
308

559A2TM60

2-49-12
(2) High speed traveling
If the pilot pressure (20~50 kgf/cm2) is supplied to the port (port S), the pilot pressure overcomes
the oil pressure in the main port and the spring elasticity force of the 2 speed spool spring (506).
and it pushes the 2 speed spool (502) to the 2 speed plug (308) direction.
This is why the pressure from the high pressure selection check valve (E) is connected to the flow
path (f).
The pressurized oil flows into the {g} chamber along the flow path {f} and pushes swash piston
(20) to contact the face 'X' of swash plate (109) with the wall of the casing (202).
As a result, the swash plate (109) is the minimum angle β. Because stroke of piston (101) is
shortened, a small amount of oil is used for one revolution.
Therefore, the displacement of the hydraulic motor is minimized and is rotated at high speed.

Port A Port B Port S

Ps Face X

502
20
109

9
f

E
506
308

559A2TM61

2-49-13
 (3) Automatic 1/2 speed control part
If the load is increased during the 2-speed driving, the hydraulic pressure on the main port is
increased. The pressure (△P) of main port and spring elasticity force of 2 speed spool spring
(506) will overcome the pressure of pilot, 2 speed spool (502) is pushed in port S direction.
F5 < [{F6 × (A4 - A3)} + (Fspring)]
F5 = PS × A3, PS : Pilot pressure, A3 : 2 speed spool area
F6 = (PA or PB) × (A4 - A3), (PA or PB) : Main pressure difference between inlet side and outlet side
Fspring = K x X ; K : Spring constant of 2 speed spool spring, X : Spring stroke
Therefore, flow path from the high pressure selection check valve (E) to (f) is blocked.
And the pressure of (g) is slowly drained to 2 speed spool chamber (f) through throttle and a
notch of 2 speed spool.
The angle of swash plate (109) transfers from β to α, and the motor automatically switches from
2 speed to 1 speed to rotate at low speed.

Port A Port B Port S

PA
Ps
Face X
PB

502
20
109 A4

f 9

A3
Drain
E
506
308

559A2TM62

2-49-14
5) REDUCTION GEAR

559A2TM63

(1) Refer to the section drawing for the basic construction.

(2) The reduction gear consists of two stage planetary gears.
(3) The reduction ratio is determined by the number of teeth of the gear, and the reduction ratio is
42.439.
In other words, the number of revolutions of the hydraulic motor is transmitted to the output shaft
at 1 / reduction ratio.
(4) The direction of rotation of the input and output shafts is opposite.

2-49-15
GROUP 5 RCV LEVER

1. STRUCTURE
The casing has the oil inlet port P (primary pressure) and the oil outlet port T (tank). In addition the
secondary pressure is taken out through ports 1, 2, 3 and 4 provided at the bottom face.

19

Switches
No. LH RH
5 Horn Breaker
5

19
25
Single
operation Simultaneous
operation

Tilted direction of
handle(RH)

1 P
T Tilted direction of
connector(LH, RH)
2 3
PF 3/8

A A Tilted direction of
handle(LH)

VIEW A 559A2RL01

6 - 9/16-18UNF
Port LH RH Port size

P Pilot oil inlet port Pilot oil inlet port

P T
T Pilot oil return port Pilot oil return port
1 Left swing port Bucket out port
PF 3/8
2 Arm in port Boom down port
3 Right swing port Bucket in port
4 Arm out port Boom up port
1 3 2 4
Hydraulic circuit

2-50
CROSS SECTION
The construction of the pilot valve is shown in the attached cross section drawing. The casing has
vertical holes in which reducing valves are assembled.
The pressure reducing section is composed of the spool (3), spring (5) for setting secondary pres-
sure, spring (9), stopper (7), spring seat (6, 12) and shim (4). The spring for setting the secondary
pressure has been generally so preset that the secondary pressure is 5 to 20.5 kgf/cm2 (depending on
the type). The spool is pushed against the push rod (8, 10) by the return spring.
When the push rod is pushed down by tilting the handle, the spring seat comes down simultaneously
and changes setting of the secondary pressure spring.

2-51
 CROSS SECTION

22
24

25

23

21

20
8
18
19 15
16,26
17
13
10 14
7

27

6
12
9
11 5
4
3
1
2
Port 2,4 Port 1,3
60W9S2RL02

1 Case 8 Push rod 15 Rod seal 22 Handle assembly

2 Bushing 9 Spring 16 Plate 23 Handle bar
3 Spool 10 Push rod 17 Boot 24 Nut
4 Shim 11 Spring 18 Joint assembly 25 Boot
5 Spring 12 Spring seat 19 Swash plate 26 Spring pin
6 Spring seat 13 Plug 20 Adjusting nut 27 Bushing
7 Stopper 14 O-ring 21 Lock nut

2-52
2. FUNCTIONS
1) FUNDAMENTAL FUNCTIONS
The pilot valve is a valve that controls the spool stroke, direction, etc of a main control valve. This
function is carried out by providing the spring at one end of the main control valve spool and apply-
ing the output pressure (secondary pressure) of the pilot valve to the other end.
For this function to be carried out satisfactorily, the pilot valve is composed of the following ele-
ments.
(1) Inlet port (P) where oil is supplied from hydraulic pump.
(2) Output ports (1, 2, 3 & 4) to apply pressure supplied from inlet port to ends of control valve
spools.
(3) Tank port (T) necessary to control the above output pressure.
(4) Spool to connect output port to inlet port or tank port.
(5) Mechanical means to control output pressure, including springs that work on the above spools.
2) FUNCTIONS OF MAJOR SECTIONS
The functions of the spool (3) are to receive the supply oil pressure from the hydraulic pump at its
port P, and to change over oil paths to determine whether the pressure oil of port P is led to output
ports 1, 2, 3 & 4 or the output port pressure oil to tank port T.
The spring (5) works on this spool to determine the output pressure.
The change the deflection of this spring, the push rod (8,10) is inserted and can slide in the plug
(13).
For the purpose of changing the displacement of the push rod through the swash plate (19) and
adjusting nut (20) are provided the handle (22) that can be tilted in any direction around the fulcrum
of the universal joint (18) center.
The spring (9) works on the case (1) and spring seat (6, 12) and tries to return the push rod (8,10)
to the zero-displacement position irrespective of the output pressure, securing its resetting to the
center position.
This also has the effect of a reaction spring to give appropriate control feeling to the operator.

2-53
3) OPERATION
The operation of the pilot valve will be described on the basis of the hydraulic circuit diagram
shown below and the attached operation explanation drawing.
The diagram shown below is the typical application example of the pilot valve.

5 6

3
1
3
P T

2 4

2-70

1 Pilot valve 3 Main pump 5 Hydraulic motor

2 Pilot pump 4 Main control valve 6 Hydraulic cylinder

2-54
(1) Case where handle is in neutral position

T 5

P
3

Port 1 Port 3

60W9S2RL03

The force of the spring (5) that determines the output pressure of the pilot valve is not applied to
the spool (3). Therefore, the spool is pushed up by the spring (9) to the position of port 1, 3 in the
operation explanation drawing. Then, since the output port is connected to tank port T only, the
output port pressure becomes equal to tank pressure.

2-55
(2) Case where handle is tilted

10

Port 1 Port 3

60W9S2RL04

When the push rod (10) is stroked, the spool (3) moves downwards.
Then port P is connected with port 1 and the oil supplied from the pilot pump flows through port 1
to generate the pressure.
When the pressure at port 1 increases to the value corresponding to the spring force set by tilting
the handle, the hydraulic pressure force balances with the spring force. If the pressure at port 1
increases higher than the set pressure, port P is disconnected from port 1 and port T is connect-
ed with port 1. If it decreases lower than the set pressure, port P is connected with port 1 and
port T is disconnected from port 1.
In this manner the secondary pressure is kept at the constant value.
Besides, in some type, when the handle is tilted more than a certain angle, the upper end of the
spool contacts with the inside bottom of the push rod and the output pressure is left to be con-
nected with port P.

2-56
 SECTION 3 HYDRAULIC SYSTEM

Group 1 Hydraulic Circuit ---------------------------------------------------------------------------------------------- 3-1

Group 2 Main Circuit ----------------------------------------------------------------------------------------------------- 3-2
Group 3 Pilot Circuit ------------------------------------------------------------------------------------------------------ 3-5
Group 4 Single Operation --------------------------------------------------------------------------------------------- 3-10
Group 5 Combined Operation -------------------------------------------------------------------------------------- 3-25
 SECTION 3 HYDRAULIC SYSTEM
GROUP 1 HYDRAULIC CIRCUIT (1/3)
3 RG
( 31 ,C)
4 LH 4 RH
11 9 10 SH
RED RED
(13 ,Dr) T2 T1
( 29 ,P4)
PG Dr 12
27
Pi Pi

28
23
(RETURN PIPE,"H") B(CW) Mu A(CCW)

(RETURN PIPE,"G")
(13 ,C) (13 ,D) (13 ,B) (13 ,A)
( 13 ,F) (13 ,G)
[Bucket IN] [RH-BW] [LH-BW] [ARM IN] (FW)P2 P1(BW) (FW)P1 P2(BW)
( 2 ,b6) [Boom Down]
( 31 ,J) ( 31 ,G) ( 7 ,3) ( 7 ,1) ( 31 ,E) [BREAKER] [DOZER UP] [SWING CW]
26 ( 24 ,Pi) ( 29 ,T3) ( 1 ,A3) ( 8 ,2) ( 31 ,B)
(SHUTTLE) ( 29 ,T2) ( 2 ,b11)
( 1 ,A2) ( 1 ,A1)
b10
A10

B10

xb9
b11

2
A11
B11

b5
B5

sb

P3
A9

B9

b2
b9

A7

B2
b8
B8
Dr

B7

A6
B6
A8

A5

A2
b6
b7

B1

b1
A1
P2
P1
Dr E A B C D F G 13
( 3 ,Dr)

DOZER
TRAVEL

P3 SELECTOR
BUCKET

SWING
BOOM2
BOOM1

TRAVEL

ARM1
ARM2

(TANK "1") ( 2 ,A2)

( 22 ,A2) ( 2 ,B2)
( 2 ,A7) ( 2 ,B8)

MR1
( 2 ,B7) ( 2 ,A8)

T2

T/S

MR3
AI
PS 25
1 Main pump
2 Main control valve

Pp
( 29 ,P2)
3 Swing motor
4 Travel motor
5 RCV lever(LH)
a9
a10

sa
a8

a2
T1
a11

a5

a1
a7

a6
( 8 ,1) ( 31 ,A)
25 PS
GAUGE ( 2 ,a11) [DOZER DOWN] [SWING CCW]
6 RCV lever(RH)
( 2 ,a6) ( 31 ,H) ( 31 ,F) ( 7 ,4) 26 ( 7 ,2) ( 31 ,D) (RETURN PIPE,"A") 7 RCV pedal(travel)
[Bucket OUT] [Boom Up] [RH-FW] (SHUTTLE) [LH-FW] [ARM OUT]
26 8 RCV lever(dozer)
( 2 ,GAUGE) ( 2 ,b11)
[TRAVEL STRAIGHT]
9 Boom cylinder
[ARM IN]
24 5, 34 6, 34 10 Arm cylinder
( 2 ,T1) "A" <RETURN PIPE>
A 7, 34
Pi ( 30 ,D3)
(FRONT OF RETURN CHECK V/V) [BREAKER] ( 22 ,A1)
( 30 ,D4) 11 Bucket cylinder
"B" ( 29 ,T2) ( 30 ,C4) ( 30 ,C3)
T
( 3 ,MU) "G"
P ( 2 ,b5)
P T SWING P T ARM BOOM P T BUCKET 12 Dozer cylinder
( 31 ,F)
(STOP V/V) 28 "H" ( 29 ,T3)
[Boom Up]
[LH] [RH] 13 Turning joint
"N" 14 Check valve
( 13 ,E)
22 15 Check valve
14 ACC A2 A3 FW BW FW BW
CW CCW IN OUT UP DOWN IN 16 Hydraulic tank
( 30 ,C2) 2 1 4 3 OUT
3 1 4 2 2 4 3
15 ( 7 ,P)
A1 SAFETY TRAVEL
SPEED
BREAKER
( 2 ,a7) ( 2 ,b7) ( 2 ,b8) 31
1
17 Oil cooler
( 2 ,a8)
17 E D F G H J 18 Air breather
B C A
( 2 ,b1) ( 2 ,a1) ( 2 ,a6) ( 2 ,b10) 19 Bypass valve & return element
( 29 ,P1)
( 13 ,Dr) TANK "1"
18 20 Strainer
P1 ( 2 ,b6) ( 2 ,a9) ( 2 ,a10)
TANK "2" 21 ( 3 ,sh) ( 2 ,b9) 21 Line filter
( 29 ,T1) ( 24 ,P)
( 29 ,T7) TANK "3" OUT T
22 3-cartridge valve sub
IN
23 Check valve
19 ( 8 ,P) ( 22 ,A1) ( 6 ,P) ( 5 ,P) 24 Pilot selector valve
( 2 ,P2) ( 2 ,P1) ( 2 ,P3)
R1
A1 A2 A3 A4
C1 C2 C3 C4 25 Pressure sensor
A1G A2G A3G PPG 1 30 8, 34 26 Shuttle valve
16 20 D1 D2 D3 D4
( 8 ,T) ( 6 ,T) ( 5 ,T)
( 30 ,C1) ( 30 ,D1) 27 Stop valve(LH)
P T
28 Stop valve(RH)
( 2 ,Dr)
29 Block(A)
E ( 7 ,T)
( 2 ,sb)
(TANK "3")
30 Block(B)
( 22 ,T) ( 24 ,T)
DOWN UP 31 Terminal
T1 T2 T3 T4 T5 T6 T7 1 2
29 ( 2 ,a2) ( 2 ,b2)
34 Last guard filter
P1 P2 P3 P4
S1
( 22 ,P1) ( 2 ,Pp) ( 3 ,PG)
559A3HC01A

3-1
HYDRAULIC CIRCUIT (2/3)
2-WAY ROTATING (ENGINE PTO PUMP) PATTERN CHANGE
A ISO
45 (LH LOCK) (RH LOCK)
J1 J2 J3 J4 ARM OUT BOOM DOWN BOOM DOWNARM OUT
J1-M1 J2-M2 J1-M2 J2-M1
<PEDAL-LH>
(ROTATOR)
35, 34 M1M2 M3 M4
(2WAY)
( 22 ,A1) FROM TO FROM TO J3-M3 J4-M4 J3-M4 J4-M3
ITEM PORT ITEM PORT ITEM PORT ITEM PORT ARM IN BOOM UP ARM IN
OPTION BOOM UP
2 J1 M1 a6
T A1 B1 5 ISO A
RCV-PEDAL MODULATION
P
( 29 ,T5) 38 4
41
J3
41
M3
2
b6
or 2 J4 M4 a9
A ( 35 ,1) ( 37 ,A1) 6, 34 6 4 J2 M2 b9

ROTATOR ROTATOR

A4
B4
b4
[RELEASE]
CCW CW
2 1 2 LH RH
ACCUMULATOR DOZER DPC VALVE

OPTION
( 2 ,b4) ( 2 ,a4) M

[RELEASE] [CLAMP]

MR
or LS
41
<MCV SPOOL ARRANGEMENTS>
44
T P
ACC
<MODULATION> 22
TRAVEL STRAIGHT

P3 SELECTOR
BUCKET

TRAVEL

OPTION
TRAVEL
ARM2

BOOM2

SWING
DOZER
BOOM1

ARM1

(RETURN PIPE,"N") SAFETY

[RELEASE] [CLAMP]
5, 34 ( 2 ,b4) ( 2 ,a4)
A1 DC
1
RELEASE CLAMP 37 A1 A2
P2 FLOW P1 FLOW P3 FLOW LH RH B A
OUTLET (13 ,F)
P1 (13 ,G)
39 E
T T
P
INLET
( 22 ,T)
( 22 ,A1)
a4

[CLAMP]

RCV-PEDAL MODULATION
or S1
a4 ( 35 ,2) ( 37 ,A2)

ARM SAFETY LOCK VALVE QUICK COUPLER

BOOM SWING 43 T E

( 2 ,A6) V2

(31 ,E)
Pi1 1 Main pump
36 <MCV SPOOL ARRANGEMENTS> 2 Main control valve(option)
( 2 ,B6)
5 RCV lever(LH, option)
TRAVEL STRAIGHT

P3 SELECTOR
BOOM SWING

31 E A B
BUCKET

40
TRAVEL

TRAVEL
ARM2

BOOM2

SWING
DOZER
BOOM1

ARM1

( 43 ,Pi1) 6 RCV lever(RH, option)

[ARM IN]
9 Boom cylinder(option)
P T
P2 FLOW P1 FLOW P3 FLOW BOOM SAFETY LOCK VALVE 22 3-cartridge valve
( 35 ,2) (TANK"2")
31 Terminal
1
BW

AW

bw

2 9 ( 2 ,B9)
A1 A2 A3 A4 32 Shuttle valve(option)
A1G A2G A3G PPG
33 Pressure switch(option)
BOOM SWING

34 Last guard filter

42 PS
35, 34 E
35 RCV pedal(option)
( 30 ,C1) ( 29 ,T5)
36 Boom swing cylinder(option)
P T
T V2 Pi1 37 2-EPPR valve(option)
( 2 ,A9) ( 31,G) 38 Proportional valve(option)
31 G 39 Gear pump(option)
QUICK COUPLER FOR CNHI
( 42 ,Pi1)
1 2 [BOOM DOWN]
40 Solenoid(option)
( 2 ,aw) ( 2 ,bw) 41 Accumulator(option)
[BOOM SWING LH] [BOOM SWING RH] TRAVEL ALARM 42 Pressure sensor(option)
[LH-BW] [RH-FW] 43 Arm cylinder(option)
[LH-FW] ( 2 ,b7) ( 2 ,a8) [RH-BW]
( 2 ,a7) ( 2 ,b8)
44 Dozer cylinder(option)
A B
40 45 Parrern change valve lever(option)
a1 b1 a2 b2
aw

( 35 ,1) 32
c1 c2 P T

(TANK "2")
33 33 (13 ,F)

559A3HC01B

3-1-1
HYDRAULIC CIRCUIT (3/3)

ANGLE DOZER BLADE

38 Proportional valve
39 Gear pump
48 Angle dozer cylinder
49 Turning joint
48 50 Dozer lever
[CW]
51 Dozer RCV
[CCW]

G.P1 C D G.P2

A B

Dr E A B C D F G H I J 49 TURNING JOINT

<DOZER RCV LEVER>

LH RH

A1 B1
(ANGLE DOZER (ANGLE DOZER
CCW) CW)
38

50
LH-RCV LEVER
M (MODULATION)

MR
LS

(30, C1) (30, D1)

T P

P T

(RETURN PIPE,"N")
51

1
OUTLET
DOWN UP
39
E 1 2

INLET (2, a2) (2, b2)

S1

559A3HC01C

3-1-2
GROUP 2 MAIN CIRCUIT

The main hydraulic circuit consists of suction circuit, delivery circuit, return circuit and drain circuit.
The hydraulic system consists of one main pump, one control valve, one swing motor, four cylinders
and two travel motors.
The swash plate type variable displacement axial piston pump is used as the main pump and is
driven by the engine at ratio 1.0 of engine speed.

1. SUCTION AND DELIVERY CIRCUIT

To cylinders To motors

Main control valve To oil cooler

To hydraulic oil tank

Main pump
Suction filter

Hydraulic oil tank

3-02 (140-7 TIER)

The pumps receive oil from the hydraulic tank through a suction filter. The discharged oil from the
pump flows into the control valve and goes out the tank ports.
The oil discharged from the main pump flows to the actuators through the control valve.
The control valve controls the hydraulic functions.
The return oil from the actuators flows to the hydraulic tank through the control valve and the oil
cooler.

3-2
2. RETURN CIRCUIT

Full flow filter Oil cooler Check valve (2)

1.5 kgf/cm2

Main control valve Actuators

Check valve (1)

3.0 kgf/cm2

Bypass relief valve

1.5 kgf/cm2 3-03 (140-7 TIER)

All oil returned from each actuator returns to the hydraulic tank through the control valve.
The bypass check valves are provided in the return circuit.
The setting pressure of bypass check valves are 1.5 kgf/cm2 (21 psi) and 3.0 kgf/cm2 (43 psi). Usually, oil
returns to the hydraulic tank from the left side of control valve through oil cooler.
When oil temperature is low, viscosity becomes higher and flow resistance increases when passing
through the oil cooler. When the oil pressure exceeds 3.0 kgf/cm2 (43 psi), the oil returns directly to the
hydraulic tank, resulting in the oil temperature being raised quickly at an appropriate level.
When the oil cooler is clogged, the oil returns directly to the hydraulic tank through bypass check valve (1).
The full-flow filter and bypass relief valve are provided in the hydraulic tank.
The oil returned from right and left side of control valve is combined and filtered by the full-flow filter. A
bypass relief valve is provided in the full-flow filter.
When the filter element is clogged, the bypass relief valve opens at 1.5 kgf/cm2 (21 psi) differential
pressure.

3-3
3. DRAIN CIRCUIT

Travel motor Swing motor

Return line

Turning
joint

Return filter

Hydraulic
oil tank

R5573CI02

Besides internal leaks from the motors and main pump, the oil for lubrication circulates.
1) TRAVEL MOTOR DRAIN CIRCUIT
Oil leaked from the right and left travel motors comes out of the drain ports provided in the
respective motor casing and join with each other. These oils pass through the turning joint and
return to the hydraulic tank after being filtered by return filter.
2) SWING MOTOR DRAIN CIRCUIT
Oil leaked from the swing motor returns to the hydraulic tank passing through a return filter with oil
drained from the travel circuit .

3-4
GROUP 3 PILOT CIRCUIT

Remote control valve Remote control valve

Dozer lever (RH lever)
(LH lever)

Safety lock
Swing parking brake
solenoid valve
Control valve

Travel speed solenoid valve

Breaker solenoid valve

Boom solenoid valve

Line filter
Relief valve
30kgf/cm 2

Pilot pump Suction filter

R5573CI03

The pilot circuit consists of suction circuit, delivery circuit and return circuit.
The pilot pump is provided with relief valve, receives the oil from the hydraulic tank through the
suction filter.
The discharged oil from the pilot pump flows to the remote control valve through line filter, solenoid
valve assemblies, swing parking brake, main control valve and safety lock solenoid valve.

3-5
 1. SUCTION, DELIVERY AND RETURN CIRCUIT

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC02

The pilot pump receive oil from the hydraulic tank. The discharged oil from the pilot pump flows to
the safety solenoid valve through the line filter. The oil is filtered by the line filter. The pilot relief valve
is provided in the pilot pump for limiting the pilot circuit pressure.
The oil filtered by line filter flows remote control valve through safety solenoid valve.
The return oil flow into the hydraulic tank.

3-6
 2. SAFETY VALVE (SAFETY LEVER)

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC03

When the lever of the safety solenoid valve is moved downward, oil flows into the remote control
valve through solenoid valve and line filter.
When the lever of the safety solenoid valve is moved upward, oil does not flow into the remote
control valve, because of the blocked port.

3-7
 3. TRAVEL SPEED CONTROL SYSTEM

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC04

When the travel speed switch is pushed, the travel speed solenoid valve is actuated and the
discharged oil from the pilot pump flows to the Ps port of pilot valve in the travel motors.
As a result, the control piston is pushed by the main oil flow, thus the displacement is minimized.
When the travel speed switch is pushed once more, the travel speed solenoid valve is return to
original position by the force of spring, the hydraulic oil of Ps port returns to the hydraulic tank.
As a result, the control piston is returned by the main oil flow, thus the displacement is maximized.

3-8
 4. SWING PARKING BRAKE RELEASE

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC05

When the swing control lever is tilted, the pilot oil flow into SH port of shuttle valve, this pressure
move spool so, discharged oil from pilot valve flow into PG port.
This pressure is applied to swing motor disc, thus the brake is released.
When the swing control lever is set in the neutral position, oil in the swing motor disc cylinder is
drained, thus the brake is applied.

3-9
 GROUP 4 SINGLE OPERATION

1. BOOM UP OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC06

When the right control lever is pulled back, the boom spools in the main control valve are moved to
the up position by the pilot oil pressure from the remote control valve.
The oil from the A1 and A2 pump flows into the main control valve and then goes to the large
chamber of boom cylinders. At the same time, the oil from the small chamber of boom cylinders
returns to the hydraulic oil tank through the boom spool in the main control valve. When this
happens, the boom goes up. The excessive pressure in the boom cylinder bottom end circuit is
prevented by relief valve. When the boom is up and the control lever is returned to neutral position,
the circuit for the holding pressure at the bottom end of the boom cylinder is closed by the boom
holding valve. This prevents the hydraulic drift of boom cylinder.

3-10
 2. BOOM DOWN OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC07

When the right control lever is pushed forward, the boom spools in the main control valve are moved
to the down position by the pilot oil pressure from the remote control valve.
The oil from the A2 pump flows into the main control valve and then goes to the small chamber of
boom cylinders. At the same time, the oil from the large chamber of boom cylinders returns to the
hydraulic tank through the boom spool in the main control valve.
The excessive pressure in the boom cylinder rod end circuit is prevented by the relief valve.

3-11
 3. ARM ROLL IN OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC08

When the left control lever is pulled back, the arm spools in the main control valve are moved the to
roll in position by the pilot oil pressure from the remote control valve.
The oil from the A1, A2 and A3 pump flows into the main control valve and then goes to the large
chamber of arm cylinder.
At the same time, the oil from small chamber of arm cylinder returns to the hydraulic oil tank through
the arm spool in the main control valve. When this happens, the arm rolls in.
The cavitation which will happen to the bottom of the arm cylinder is also prevented by the make-up
valve in the main control valve.

3-12
 4. ARM ROLL OUT OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC09

When the left control lever is pushed forward, the arm spool in the main control valve are moved to
the roll out position by the pilot oil pressure from the remote control valve.
The oil from the A1 and A2 pump flows into the main control valve and then goes to the small
chamber of arm cylinder.
At the same time, the oil from the large chamber of arm cylinder returns to the hydraulic oil tank
through the arm spool in the main control valve. When this happens, the arm rolls out.
The cavitation which will happen to the rod of the arm cylinder is also prevented by the make-up
valve in the main control valve.

3-13
 5. BUCKET ROLL IN OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC10

When the right control lever is pulled left, the bucket spool in the main control valve is moved to the
roll in position by the pilot oil pressure from the remote control valve.
The oil from the A2 pump flows into the main control valve and then goes to the large chamber of
bucket cylinder.
At the same time, the oil from the small chamber of bucket cylinder returns to the hydraulic oil tank
through the bucket spool in the main control valve. When this happens, the bucket rolls in.
The cavitation which will happen to the bottom of the bucket cylinder is also prevented by the make-
up valve in the main control valve.

3-14
 6. BUCKET ROLL OUT OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC11

When the right control lever is pushed right, the bucket spool in the main control valve is moved to
the roll out position by the pilot oil pressure from the remote control valve.
The oil from the A2 pump flows into the main control valve and then goes to the small chamber of
bucket cylinder.
At the same time, the oil from the large chamber of bucket cylinder returns to the hydraulic oil tank
through the bucket spool in the main control valve. When this happens, the bucket rolls out.
The cavitation which will happen to the rod of the bucket cylinder is also prevented by the make-up
valve in the main control valve.

3-15
 7. SWING OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC12

When the left control lever is pushed left or right, the swing spool in the main control valve is moved
to the left or right swing position by the pilot oil pressure from the remote control valve.
The oil from the A3 pump flows into the main control valve and then goes to the swing motor.
At the same time, the return oil from the swing motor returns to the hydraulic oil tank through the
swing spool in the main control valve. When this happens, the superstructure swings to the left or
right. The swing parking brake, make up valve and the overload relief valve are provided in the
swing motors. The cavitation which will happen to the swing motor is also prevented by the make up
valve in the swing motor itself.

3-16
SWING CIRCUIT OPERATION

PARKING BRAKE
SWING MOTOR
BRAKE RELEASE VALVE
BRAKE OFF SH

BRAKE ON
Dr
PG

B(CW) Mu A(CCW)
MOTOR BRAKE VALVE
MAKE UP VALVE
TO/FROM MAIN CONTROL VALVE

559A3HC40

1) MOTOR BRAKE VALVE

Motor brake valve for the swing motor limits to cushion the starting and stopping pressure of swing
operation.
2) MAKE UP VALVE
The make up valves prevent cavitation by supplying return oil to the vacuum side of the motor.
3) PARKING BRAKE
In case that the parking, of the machine at slope is required during operation, there is the danger of
involuntary swing caused by the self weight of the machine. The brake is connected to prevent
this involuntary swing.
PARKING BRAKE "OFF" OPERATION
The parking brake is released by the pilot pressure oil from the pilot pump.
When the left control lever placed in the swing position, the pilot pressure at the shuttle valve is
transferred to the brake release valve and the brake release valve is change over. Then the pilot
pressure lift the brake piston and release the parking brake.
PARKING BRAKE "ON" OPERATION
When the control lever placed in the neutral position, the pressure of the pilot oil passage down.
Then the brake release valve returned to the neutral position and the oil is returned from the brake
piston to the tank. And the brake is set to 'ON".

3-17
 8. TRAVEL FORWARD AND REVERSE
REVERSE OPERATION
OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC14

When the travel levers are pushed forward or reverse position, the travel spools in the main control
valve are moved to the forward or reverse travel position by the link. The oil from the both pumps
(A1, A2) flows into the main control valve and then goes to the both travel motors through the turning
joint. The return oil from both travel motors returns to the hydraulic oil tank through the turning joint
and the travel spools in the main control valve. When this happens, the machine moves to the
forward or reverse.

3-18
TRAVEL CIRCUIT OPERATION

Travel motor

T1 T2 T1
a1 a2 a2 a1

PS

P1 P2 P2 P1

Overload relief valve Counter balance valve

Turning joint

Pk
Main control valve
5593HC15

Valves are provided on travel motors to offer the following functions.

1) COUNTER BALANCE VALVE

When stopping the motor of slope descending, this valve to prevent the motor over run.
2) OVERLOAD RELIEF VALVE
Relief valve limit the circuit pressure below 220 kgf/cm2 to prevent high pressure generated at at
time of stopping the machine. Stopping the motor, this valve sucks the oil from lower pressure
passage for preventing the negative pressure and the cavitation of the motor.

3-19
 9. DOZER UP OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC16

When the dozer control lever is pulled back, the dozer spool in the main control valve is moved to
the dozer up position by the pilot oil pressure from the remote control valve.
The oil from the A3 pump flows into the main control valve and then goes to the small chamber of
dozer cylinders.
At the same time, the oil from the large chamber of dozer cylinders returns to the hydraulic oil tank
through the dozer spool in the main control valve. When this happens, the dozer goes up.

3-20
 10. DOZER DOWN OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC17

When the dozer control lever is pushed forward, the dozer spool in the main control valve is moved
to the dozer down position by the pilot oil pressure from the remote control valve.
The oil from the A3 pump flows into the main control valve and then goes to the large chamber of
dozer cylinders.
At the same time, the oil from the small chamber of dozer cylinders returns to the hydraulic oil tank
through the dozer spool in the main control valve. When this happens, the dozer blade is down.

3-21
 GROUP 5 COMBINED OPERATION
1. OUTLINE

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)
STRAIGHT TRAVEL SPOOL
BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC21

The oil from the A1, A2, A3 pump flows through the neutral oil passage, bypass oil passage and
confluence oil passage in the main control valve. Then the oil goes to each actuator and operates
them. Check valves and orifices are located on these oil passage in the main control valve. These
control the oil from the main pumps so as to correspond to the operation of each actuator and
smooth the combined operation.
STRAIGHT TRAVEL SPOOL
This straight travel spool for straight travel is provided in the main control valve.
If any actuator is operated when traveling, the straight travel spool is pushed to the up by the pilot oil
pressure.
Consequently, the left and right travel oil supply passage are connected, and equivalent amount of
oil flows into the left and right travel motors. This keeps the straight travel.

3-22
 2. COMBINED SWING AND BOOM OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC22

When the swing and boom functions are operated, simultaneously the swing spool and boom
spools in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve.
The oil from the A1 and A2 pump flows into the boom cylinder through boom and boom 2 spool.
The oil from the A3 pump flows into the swing motor through the swing spool.
The superstructure swings and the boom is operated.

3-23
 3. COMBINED SWING AND ARM OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC23

When the swing and arm functions are operated, simultaneously the swing spool and arm spools in
the main control valve are moved to the functional position by the pilot oil pressure from the remote
control valve.
The oil from the A3 pump flows into the swing motor through swing spool.
The oil from the A1 and A2 pump flows into the arm cylinder through the arm and arm 2 spool.
The superstructure swings and the arm is operated.

3-24
 4. COMBINED SWING AND BUCKET OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC24

When the swing and bucket functions are operated, simultaneously the swing spool and bucket
spool in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve.
The oil from the A3 pump flows into the swing motor through the swing spool.
The oil from the A2 pump flows into the bucket cylinder through the bucket spool.

3-25
5. COMBINED SWING, BOOM, ARM AND BUCKET OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC25

When the swing, boom, arm and bucket functions are operated, simultaneously each spool in the
main control valve is moved to the functional position by the pilot oil pressure from the remote
control valve.
The oil from the A1 pump flows into the boom cylinders and arm cylinder through boom 2 spool,
arm spool.
The oil from the A2 pump flows into the boom cylinders, arm cylinder and bucket cylinder through
the boom spool, arm 2 spool, bucket spool.
The oil from the A3 pump flows into the swing motor through the swing spool.
The superstructure swings and the boom, arm and bucket are operated.

3-26
 6. COMBINED SWING AND TRAVEL OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)

BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC26

When the swing and travel functions are operated, simultaneously the swing spool and travel spools
in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve and the travel levers.
The oil from the A3 pump flows into the swing motor through the swing spool.
The oil from the A1 pump flows into the travel motor through the LH travel spool.
The oil from the A2 pump flows into the travel motor through RH travel spool.
The superstructure swings and the machine travels straight.

3-27
 7. COMBINED BOOM AND TRAVEL OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)
STRAIGHT TRAVEL SPOOL
BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC27

When the boom and travel functions are operated, simultaneously the boom spools and travel
spools in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve and the straight travel spool is pushed to the up by the oil pressure from pilot
pump.
The oil from the A1 and A2 pumps flows into the boom cylinders and the travel motors through
boom 1, boom 2, travel LH and travel RH spools via the straight travel spool.
The boom is operated and the machine travels straight.

3-28
 8. COMBINED ARM AND TRAVEL OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)
STRAIGHT TRAVEL SPOOL
BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC28

When the arm and travel functions are operated, simultaneously the arm spools and travel spools in
the main control valve are moved to the functional position by the pilot oil pressure from the remote
control valve and the straight travel spool is pushed to the up by the oil pressure from pilot pump.
The oil from the A1 and A2 pumps flows into the travel motors and the arm cylinder through travel
spools and arm spools via the straight travel spool.
At the same time, the oil from the A3 pump flows into the arm cylinder through the arm 1 spool via
the selector valve.
The arm is operated and the machine travels straight.

3-29
 9. COMBINED BUCKET AND TRAVEL OPERATION

T/MOTOR LH T/MOTOR RH
RED RED BOOM
T1 T2
DOZER BUCKET BOOM ARM SWING
CYLINDER (2-WAY) CYLINDER BREAKER
CYLINDER CYLINDER CYLINDER SWING MOTOR

Ps Ps sh
pg Dr
QUICK
COUPLER

(FW)P1 P2(BW) (FW)P2 P1(BW) B(CW) Mu A(CCW)

Dr E A B C D F G A B

Dr(Swing motor) P T

b6 b5

A10 B10 xb9 A9 B9 A8 B8 P1 P2 B7 A7 B6 A6 B5 A5 B4 A4 P3 AW BW A2 B2 A1 B1

b11 b10 Dr b9 Sb bW b2 b1
b4

T2

PS
AI

Pp

a11 a10 a6 a5 a4 Sa T1 aW a2 a1

b8 a8 a7 b7

a9 Gauge Dr

Pp(MCV)
STRAIGHT TRAVEL SPOOL
BOOM
TRAVEL (2-WAY) SWING D/BLADE SWING ARM BOOM BUCKET
RH LH IN OUT UP DOWN OUT IN
3 1 4 2 2 4 1 3

MCV b5
2 P T 14 3 1 P T 2 1 P T 2 1 P T 2 R1 A1 A2 A3 A4
ACC (b8) (b4)
(a7) (b7) (a8) (a4) (bw) (aw) (a2) (b2)
A1 A2 A3 30K
SAFETY TRAVEL
SPEED BREAKER

I HA B D E F G
b1 a1 b6 a6 a9 b9 a10 b10
P1
b11 a11 xb9

T
S1

559A3HC29

When the bucket and travel functions are operated, simultaneously the bucket spool and travel
spools in the main control valve are moved to the functional position by the pilot oil pressure from the
remote control valve, and the straight travel spool is pushed to the up by the oil pressure from pilot
pump. The oil from the A1 and A2 pumps flows into the travel motors and the bucket cylinder
through the travel spools and the bucket spool via the straight travel spool.
The bucket is operated and the machine travels straight.

3-30
 SECTION 4 ELECTRICAL SYSTEM

Group 1 Component Location -------------------------------------------------------------------------------------- 4-1

Group 2 Monitoring system ------------------------------------------------------------------------------------------ 4-3
Group 3 Electrical Circuit ---------------------------------------------------------------------------------------------- 4-63
Group 4 Electrical Component Specification -------------------------------------------------------------- 4-80
Group 5 Connectors ------------------------------------------------------------------------------------------------------ 4-87
Group 6 Fault codes ------------------------------------------------------------------------------------------------------ 4-104
 SECTION 4 ELECTRICAL SYSTEM
GROUP 1 COMPONENT LOCATION

1. LOCATION 1

10
1 11
2 12
3 13
4 14
5 15
6 16
7
Switch
panel 2

Switch
panel 1

17

18
8
19
9 20

21

22

559A4EL03

1 Head light switch 9 Accel dial switch 17 Speaker

2 Work light switch 10 Quick clamp switch 18 Fuse box
3 Travel alarm switch 11 Wiper switch 19 Cigar lighter
4 Cab light switch 12 Washer switch 20 Horn switch
5 Beacon switch (opt) 13 Overload switch (opt) 21 Radio & USB player
6 Breaker selection switch (opt) 14 Air compressor switch (opt) 22 Aircon & heater controller
7 Start switch 15 DPF switch
8 Breaker operation switch (opt) 16 Master switch

4-1
2. LOCATION 2

Cab
3
9 10

7
6
5

4 11

2
12

559A4EL03-1

1 Lamp 5 Battery relay 9 MCU

2 Horn 6 Fuel filler pump 10 Fuel sender
3 Master switch 7 Washer pump 11 Start relay
4 Battery 8 Filler pump toggle switch 12 Travel alarm buzzer

4-2
GROUP 2 MONITORING SYSTEM (machine serial No.: ~#0560)

1. OUTLINE
Monitoring system consists of the monitor part and switch part.
The monitor part gives warnings when any abnormality occurs in the machine and informs the
condition of the machine.
Various select switches are built into the monitor panel, which act as the control portion of the
machine control system.

2. CLUSTER
1) MONITOR PANEL

Warning lamps Time display

(See page 4-6)

Gauge(See page 4-4)

Main menu(See page 4-15)

Pilot lamps
(See page 4-11)

Switches
(See page 4-13)

559A4EL20EE

※ The warning lamp pops up, lights ON (on the left-top side) and the buzzer sounds when the
machine has a problem.
The warning lamp lights ON until the problem is cleared. Refer to page 4-6 for details.

4-3
3. CLUSTER FUNCTION
1) GAUGES AND DISPLAYS
(1) Operation screen
When you first turn starting switch ON, the operation screen will appear.

Default (A type) Option (B type) Option (C type)

5
3 1
3 2
1 2 3
1 2 4
5 5
4 4
559A3CD07AE 559A3CD07BE 559A3CD07CE

1 Engine coolant temp gauge 3 Fuel level gauge 5 Accel dial

2 Hydraulic oil temp gauge 4 Engine rpm

※ Operation screen type can be set by the screen type menu of the display.
Refer to page 4-25 for details.

(2) Engine coolant temperature gauge

① This gauge indicates the temperature of coolant.
·Black range : 40-115˚C (104-239˚F)
·Red range : Above 115˚C (239˚F)
② If the indicator is in the red range or lamp lights ON in red,
turn OFF the engine and check the engine cooling system.
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
55I3CD07G
the electric device as that can be caused by the poor
connection of electricity or sensor.

(3) Hydraulic oil temperature gauge

① This gauge indicates the temperature of hydraulic oil.
·Black range : 40-105˚C (104-221˚F)
·Red range : Above 105˚C (221˚F)
② If the indicator is in the red range or lamp lights ON in red,
reduce the load on the system. If the gauge stays in the red
range, stop the machine and check the cause of the problem.
55I3CD07E
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
the electric device as that can be caused by the poor
connection of electricity or sensor.

4-4
(4) Fuel level gauge
① This gauge indicates the amount of fuel in the fuel tank.
② Fill the fuel when the red range, or lamp lights ON in red.
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
the electric device as that can be caused by the poor
connection of electricity or sensor.
55I3CD07F

(5) Engine rpm display

① This displays the engine speed.

559A3CD35

(6) Accel dial display

① This displays acceleration dial level from 0 to 10 step.

55I3CD07C

3) COMMUNICATION ERROR AND LOW VOLTAGE WARNING POP-UP

(1) Communication error pop-up
① Cluster displays this communication error pop-up when it has
communication error with MCU.
② Communication error pop-up displays at operation screen only.
Just buzzer alarm at the other screen.
③ If communication with MCU become normal state, it will
disappear automatically.
559A3CD71

(2) Low voltage warning pop-up

① Cluster displays this low voltage warning pop-up when the
battery voltage is low.
② Low voltage warning pop-up displays at operation screen only.
Just buzzer alarm at the other screen.
③ This pop-up will disappear with using touch screen or buzzer
stop switch. While the battery voltage is low, buzzer sounds
every minute.
559A3CD72
④ When the battery voltage is higher than 11.5 V, the pop-up off.

4-5
 4) WARNING LAMPS
HEST warning lamp
DPF regeneration acknowledge warning lamp
DPF regeneration inhibit warning lamp
Battery charging warning lamp
Emergency warning lamp

PF warning lamp(-#0339)
(#0340-)

DPF warning lamp

Overload warning lamp
Air cleaner warning lamp
Engine stop warning lamp
Check engine warning lamp
Engine oil pressure warning lamp
Engine coolant temp warning lamp Hyd oil temp warning lamp
Fuel level warning lamp 559A3CD08E

※ Each warning lamp on the left-top of the LCD pops up on the center of LCD and the buzzer
sounds when the each warning is happened. The pop-up warning lamp moves to the original
position and lights ON when the buzzer stop switch is pushed or the pop-up is touched. And the
buzzer stops. Refer to page 4-14 for the switch.
※ When the warning lamps light ON more than 4, you can check all lamps with next page button
( , ) near the warning lamps.
(1) Engine coolant temperature warning lamp
① The lamp pops up on the center of LCD and the buzzer
sounds when the engine coolant temperature is over 115˚C.
② The pop-up lamp moves to the original position and lights ON
when the buzzer stop switch is pushed or pop-up is touched.
Also, the buzzer stops and lamp keeps ON.
③ Check the cooling system when the lamp keeps ON.

(2) Hydraulic oil temperature warning lamp

① The lamp pops up on the center of LCD and the buzzer
sounds when the hydraulic oil temperature is over 105˚C.
② The pop-up lamp moves to the original position and lights
ON when the buzzer stop switch is pushed or pop-up is
touched. Also, the buzzer stops and lamp keeps ON.
③ Check the hydraulic oil level and hydraulic oil cooling system.

(3) Fuel level warning lamp

① This warning lamp lights ON and the buzzer sounds when the
level of fuel is below 10%.
② Fill the fuel immediately when the lamp is ON.

4-6
(4) Emergency warning lamp
① This lamp pops up and the buzzer sounds when each of the
below warnings are happened.
- Engine coolant overheating (over 115˚C)
- Hydraulic oil overheating (over 105˚C)
- MCU input voltage abnormal
21093CD30
- Accel dial circuit abnormal or open
※ The pop-up warning lamp moves to the original position and
lights ON when the buzzer stop switch is pushed or pop-up is
touched. Also the buzzer stops.
This is same as following warning lamps.
② When this warning lamp lights ON, machine must be checked
and serviced immediately.

(5) Engine oil pressure warning lamp

① This lamp lights ON when the engine oil pressure is low.
② If the lamp lights ON, shut OFF the engine immediately.
Check oil level.

21093CD32

(6) Check engine warning lamp

① This lamp lights ON when the communication between
MCU and engine ECM on the engine is abnormal, or if the
cluster received any fault code from engine ECM.
② Check the communication line between them.
If the communication line is OK, then check the fault codes on
the cluster.
③ Also, this lamp pops up when the level of DPF soot is high.
※ Refer to the page 4-8 for the DPF warning lamp.

(7) Battery charging warning lamp

① This lamp lights ON when the battery charging voltage is low.
② Check the battery charging circuit when this lamp is ON.

21093CD34

(8) Air cleaner warning lamp

① This lamp lights ON when the filter of air cleaner is clogged.
② Check the filter and clean or replace it.

4-7
 (9) Overload warning lamp (opt)
① When the machine is overload, the overload warning lamp
lights ON during the overload switch is ON. (if equipped)
② Reduce the machine load.
Initiate a manual regeneration

21093CD36

(10) DPF (diesel particulate filter) warning lamp

① This warning lamp lights ON or OFF when the regeneration is
needed.
② This warning lamp lights ON while DPF regeneration inhibit
switch is in "Regeneration ingibited" state, when stationary
regeneration is permitted.
2609A3CD19 ③ This warning lamp lights ON during reset regeneration standby
or in back up mode.
④ This warning lamp lights flash during reset regeneration
standby DPF regeneration inhibit switch is in "Regeneration
inhibited" state.
※ Consequences of delaying regeneration
- Poor performance caused by increasing exhaust gas
pressure.
- Higher fuel consumption
- Shorter filter lifetime

Warning lamp
DPF Check engine Stop engine
Condition Remedy
or STOP or

(pop up) (pop up)

Normal Off Off Off · Automatic regeneration

· Push DPF switch to OFF position if DPF switch
Soot low On Off Off is in inhibit position.
· Engine power may be reduced automatically
(soot medium)
Soot midium Blink Off Off

· Engine power and speed will be reduced

Soot high On On Off automatically
· Initiate a manual regeneration
· Stop the engine immediatary.
Stop On Off On · Please contact your Hyundai service center or
local dealer.

4-8
※ Manual regeneration method of DPF

Safety button
※ Manual regeneration applies if the machine is in a fireproof
1
area and there is no plan to turn off the maching during the
2
regeneration.
① Stop and park the machine.
② The accel dial to the lowerest position and operate the engine
in idling.
③ Pull the safety button and push the switch to position ② to
initiate the manual regeneration of DPF.
※ Refer to the page 4-62 for the switch operation.
ACK
※ The engine speed may increase gradually to high idle rpm and
HEST warning DPF regeneration
lamp ON ACK lamp ON DPF regeneration begins and it will take approximately 25~30
minutes.
④ When the manual regeneration starts, the DPF warning lamp
turns OFF and the regeneration acknowledge lamp and HEST
ACK warning lamp will light ON during the regeneration function is
HEST warning DPF regeneration operating.
lamp OFF ACK lamp OFF
⑤ The regeneration acknowledge lamp and HEST warning lamp
559A3CD143 will light OFF when the regeneration function is completed.

(11) HEST (High exhaust system temperature) warning lamp

① This warning lamp indicates, when illuminated, that exhaust
temperatures are high due to regeneration of the DPF.
② The lamp will also illuminate during a manual regeneration.
③ When this lamp is illuminated, be sure the exhaust pipe outlet
is not directed at any surface or material that can melt, burn, or
2609A3CD21 explode.
When this lamp is illuminated, the exhaust gas temperature
could reach 600
600˚˚C [1112
[1112˚˚F],
], which is hot enough to ignite or
melt common materials, and to burn people.
※ The lamp does not signify the need for any kind of equipment
or engine service; It merely alerts the equipment operator to
high exhaust temperatures. It will be common for the lamp to
illuminate on and off during normal equipment operation as the
engine completes regeneration.

(12) Emission system fail warning lamp

① This warning lamp indicates there are faults related to the
emission system.
② The lamp lights ON when each of the below warnings is
happened.
a. The EGR valve malfunctions.
300A3CD15
b. Electrical malfunction of the EGR control sensors.
(disconnection, short)
c. Tampering with the EGR control sensors.
③ This warning lamp can be shown together with DPF warning
lamp or engine fail lamp or engine stop warning lamp when
diagsis DPF systems.
※ Please contact your Hyundai service center or local dealer.

4-9
(13) DPF regeneration inhibit warning lamp
① This warning lamp indicates, when illuminated, the DPF switch
is pushed inhibit position, therfore automatic and manual
regeneration can not occur.
※ Refer to the page 4-62 for the DPF switch.

2609A3CD20

(14) DPF regeneration acknowledge warning lamp

① This warning lamp lights ON stationary regeneration is in
process.
② This warning lamp lights ON, when stationary regeneration is
in process after DPF regeneration request switch is pressed
ACK
and hold for more than 3 seconds.
559A3CD10 ③ This warning lamp lights flash when stationary regeneration
standby or regeneration interlock switch is in "regeneration
permitted (interlock enabled) status.
④ This warning lamp lights flash while stationary regeneration
standby or back mode, when DPF regeneration inhibit switch
in "Regeneration permitted" status and regeneration interlock
switch is in regeneration permitted status.

(15) Stop engine warning lamp

① If the lamp lights ON, stop the engine immediately and check
the engine.
STOP ② Check the fault codes on the monitor.
※ Please contact your Hyundai service center or local dealer.

4-10
5) PILOT LAMPS

Preheat pilot lamp Maintenance pilot lamp

(#0340-)
1

Power mode pilot lamp Travel speed pilot lamp

(#0340-) Auto idle mode pilot lamp
Warming up pilot lamp Auto idle status pilot lamp

559A3CD02E

※ When the pilot lamps light ON more than 3, you can check all lamps with next page button
( , ).

(1) Mode pilot lamps

No Mode Pilot lamp Selected mode

Heavy duty power work mode

1 Power mode
Standard power mode

Low speed traveling

2 Travel mode
High speed traveling

Auto idle status

3 Auto idle mode
Auto idle mode

(2) Preheat pilot lamp

① Turning the start key switch ON position starts preheating in
cold weather.
② Start the engine after this lamp is OFF.

55I3CD39

(3) Warming up pilot lamp

① This lamp is turned ON when the coolant temperature is
below 30˚C (86˚F ).
② The automatic warming up is cancelled when the engine
coolant temperature is above 30˚C, or when 10 minutes have
passed since starting the engine.
21093CD40

4-11
(4) Auto idle status/ mode pilot lamp
① The auto idle pilot lamp will be ON when the idle mode is
selected.
AUTO ② The auto idle status pilot lamp will be ON when all levers and
pedals are at neutral position, and the auto idle mode is
n/min
selected.

(5) Maintenance pilot lamp

① This lamp will be ON when the consuming parts are needed to
change or replace. It means that the change or replacement
interval of the consuming parts remains below 30 hours.
② Check the message in maintenance information of main menu.
Also, this lamp lights ON for 3 minutes when the start switch is
ON position.
※ Refer to the page 4-23.

4-12
 6) SWITCHES

Main menu quick

touch switch

Power mode pilot lamp Travel speed pilot lamp

Auto idle pilot lamp

Power mode switch Escape(previous or parent menu)

Rear camera(option)

Travel speed switch Auto idle/Buzzer stop switch

Select switch
559A3CD47

※ When the switches are selected, the pilot lamps are displayed on the LCD. Refer to the page 4-11
for details.

(1) Power mode switch

① This switch is to select the machine power mode and selected
power mode pilot lamp is displayed on the pilot lamp position.
・P : Heavy duty power work.
・S : Standard power work.
② The pilot lamp changes S → P → S in order.
559A3CD25

(2) Select switch

① This switch is used to select or change the menu and input
value.
② Knob push
·Long (over 2 sec) : Return to the operation screen
·Medium (0.5~2 sec) : Return to the previous screen
55I3CD50C ·Short (below 0.5 sec) : Select menu
③ Knob rotation
This knob changes menu and input value.
·Right turning : Down direction / Increase input value
·Left turning : Up direction / Decreased input value

4-13
(3) Auto idle/ buzzer stop switch
① This switch is used to activate or cancel the auto idle function.
※ Refer to the page 4-12 for details.
② The buzzer sounds when the machine has a problem.
In this case, push this switch and buzzer stops, but the warning
lamp blinks until the problem is cleared.
559A3CD50D

(4) Travel speed control switch

① This switch is used to select the travel speed alternatively.
· : Low speed
· : High speed

55I33CD50B

(5) Escape/ Camera switch

① This switch is used to return to the previous menu or parent
menu.
② In the operation screen, pushing this switch will display the
view of the camera on the machine (if equipped).
Please refer to page 4-27 for the camera.
559A3CD50E
③ If the camera is not installed, this switch is used only ESC
function.

4-14
7) MAIN MENU
· Operation screen

559A3CD32A Tap Main menu screen Sub menu screen

or
Press

Press

559A3CD32B

559A3CD32D 559A3CD32E

559A3CD32C

※ Please refer to select switch, page 4-13 for selection and change of menu and input value.

(1) Structure
No Main menu Sub menu Description
Active fault - Machine MCU
Active fault - Engine ECU
Logged fault - Machine MCU
1 Logged fault - Engine ECU
Monitoring (Analog) Machine information
Monitoring Monitoring (Digital) - Input Switch status
55I3CD51A Monitoring (Digital) - Output Output status
ESL mode setting ESL mode setting
Change password Password change
Maintenance information Replacement, Change interval oils and filters
2 Machine Information Cluster, MCU, Engine, Machine
A/S phone number A/S phone number, A/S phone number change
Management
Service menu Delete logged faults, Software download,
55I3CD51B Operating hour, power shift
Clock Clock
Screen type A type, B type, C type
Brightness setting Manual, Auto
H H
E F

3 C C

Unit setting Temperature, Pressure

Display Language 12 language
55I3CD51C Calibration Calibrating the touch screen
Camera setting Number of active, Display order, Camera No.
Mode Operation mode select
4 Video Play music and video file

Utilities
55I3CD51D

4-15
(2) Monitoring
① Active fault - Machine

559A3CD50

559A3CD50A

· The active faults of the MCU can be checked by this menu.

② Active fault - Engine

559A3CD50B

559A3CD50C

· The active faults of engine ECU can be checked by this menu.

③ Logged fault - Machine/ Engine

559A3CD51

559A3CD50A

· The logged faults of the MCU or engine ECU can be checked by this menu.
· Only for the service person.

④ Monitoring (Analog)

559A3CD52

559A3CD52A

· The machine status such as the engine rpm, oil temperature, voltage and pressure etc. can
be checked by this menu.

4-16
⑤ Monitoring (Digital) - Input

559A3CD53

559A3CD53A

· The switch status can be confirmed by this menu.

· The activated switchs are blue light ON.

⑥ Monitoring (Digital) - Output

559A3CD54

559A3CD54A

· The output status can be confirmed by this menu.

· The output pilot lamps are blue light ON.

4-17
 (3) Management
① ESL mode setting

559A3CD55

559A3CD55A 559A3CD55B

· ESL mode setting

- ESL : Engine Starting Limit
- ESL mode is desingned to be a theft deterrent or will prevent the unauthorized operation of
the machine.
- If the ESL mode was selected Enable, the password will be required when the start switch is
turned ON.
- Disable : Not used ESL function
Enable (always) : The password is required whenever the operator starts engine.
Enable (Interval) : The password is required when the operator starts engine first.
But the operator can restart the engine within the interval time without in-
putting the password.
The interval time can be set maximum 2 days.
※Default
Default password : 00000
※Password
Password length : 5~10 digit

② Change password
- The password is 5~10 digits.

559A3CD56

559A3CD56A 559A3CD56B

Enter the current password Enter the new password

559A3CD56D 559A3CD56C

The new password is stored in the MCU. Enter the new password again

4-18
③ Option attach
a. Option attach selection

R559A3CD33O

R559A3CD41O

R559A3CD42O

- Three kinds of option attachment can be selected by this menu.

ⓐ Rotary Grapple (4 way)
ⓑ Grapple (2 way)
ⓒ Auger (2 way)
※ There are two user modes (type A or B) in each option attach.

4-19
b. Proportional flux control setting
User can set preferable value of each option attachment by this menu.

a) Rotary setting
· Select Rotary
RCV, button and flux
can be set by this menu

R559A3CD43O

R559A3CD51O

· RCV setting
- Enable set LH or RH RCV
for rotary operation.
- Example :
Select LH for rotary ->
RH set for grapple automatically.
R559A3CD52O

· Button setting (CW rotation)

- Enable set LH or RH button
for CW or CCW rotation.
- Example :
Select LH for CW rotation ->
RH set for CCW rotation
R559A3CD53O automatically

· Flux setting
- Enable set from level 1 to level 5.
- Example :
Select level 3.

R559A3CD54O

4-20
 b) Grapple setting
· Select grapple
RCV, button and flux
can be set by this menu

R559A3CD43O

R559A3CD61O

· RCV setting
- Enable set LH or RH RCV for
grapple operation.
- Example :
Select RH for grapple ->
LH set for rotary automatically.
R559A3CD62O

· Button setting (Close)

- Enable set LH or RH button
for close or open.
- Example :
Select RH for Close ->
LH set for open automatically
R559A3CD63O

· Flux setting
- Enable set from level 1 to level 5.
- Example :
Select level 1.

R559A3CD72P R559A3CD64O

· Save setting value

- Enable save setting value by
pressing change ( ) button.

R559A3CD73O R559A3CD71O

· Setting value saved once, it memorized in each icon and the last setting value is activated.
· Saved setting can be used by pressing Icon button only.
· There are two kinds (A and B) in each option attach setting and six kinds of option attach setting
can be saved totally (2 of 4 way, 4 of 2 way).

4-21
c. Confirmation
Previous setting value can be
checked by following procedure.
a) - Menu > Management > option

b) attach
a) Rotary setting
R559A3CD81O
- Rotary RCV : LH
R559A3CD82O - Rotary flux level : 3
- CW rotation : LH
Symbol ( ) is activated - CCW rotation : RH
when option attach function b) Grapple setting
is used. - Grapple RCV : RH
- Grapple flux level : 3
- Open : LH
- Close : RH

4-22
④ Maintenance information

559A3CD57

559A3CD57A 559A3CD57B

· Elapse : Maintenance elapsed time.

· Interval : The change or replace interval can be changed in the unit of 50 hours.
· History-Hour : Maintenance replacement history.
· Replacement : The elapsed time will be reset to zero (0).
· Change or relpace interval

No Item Interval
1 Engine oil 500
2 Final gear oil 1000
3 Swing gear oil 1000
4 Hydraulic oil 5000
5 Pilot line filter 1000
6 Hydraulic oil return filter 1000
7 Engine oil filter 500
8 Fuel filter 500
9 Pre-filter 500
10 Hydraulic tank breather 1000
11 Air cleaner 1000
12 Radiator coolant 2000
13 Swing gear pinion grease 1000

⑤ Machine Information

559A3CD58

559A3CD58A

· This can confirm the identification of the cluster, MCU, engine and machine.

4-23
 ⑥ A/S phone number

559A3CD59

559A3CD59A 559A3CD59B

· The A/S phone number can be checked and changed.

⑦ Service menu

559A3CD60

Enter the password 559A3CD60A 559A3CD60B

· Delete logged fault : Logged faults of MCU or engine ECU can be deleted.
· S/W download : Update and display software about operating system, application, image
and font.
· Operating hours : Operating hours since the machine line out can be checked.
· Power shift : Set power shift mode (standard/option)
(4) Display
① Clock

559A3CD61

559A3CD61A

· The first line's three spots "****-**-**" represent Year/Month/Day each.

· The second line shows the current time. (AM, PM/0:00~12:59)

4-24
② Screen type

559A3CD62

559A3CD62A

· The screen type (A,B,C) of the LCD can be selected by this menu.

③ Brightness setting calibration

559A3CD63

559A3CD63A
Manual (1st~10th step)

559A3CD63B 559A3CD63C
Auto (day/night) Auto (time)

· If "Auto" is chosen, brightness for day and night can be differently set up. Also, users can de-
fine which day time interval. (Set day starting time and ending time)

④ Unit setting

559A3CD64

559A3CD64A

· Temperature : ˚C ↔ ˚F
· Pressure : bar ↔ MPa ↔ kgf/cm2 ↔psi

4-25
⑤ Language

559A3CD65

559A3CD65A

· User can select preferable language and all displays are changed the selected language.

⑥ Calibration
· When touch awareness goes wrong, this function use.
Fall in the next step if touches the middle point of cross with fingernail.
If touches total five points as follows, the setting is completed.

559A3CD66

2609A3CD149-153

4-26
(5) Utilities
① Camera setting
· Three cameras can be installed on the machine and the display order can be set by this
menu.
· If the camera was not equipped, this menu is not useful.

559A3CD67

559A3CD67A

· In the operation screen, if the ESC/CAM switch is pushed, rear view camera display or stop.
· Turnning the select switch in clockwise direction, the next ordered will be shown and in counter-
clockwise direction, the previously ordered will be shown. Also, you can change camera
channel using touch the screen.
· Push the select switch or touch the screen, the displayed screen will be enlargement.

559A3CD68

559A3CD68A 559A3CD68B

② Mode

559A3CD69

559A3CD69A

· When this cluster's buttons are not work, you can control using touch screen instead of
these buttons.
· You can only control in this mode screen.

4-27
③ Video
· Play MP4 or codec file of external hard disk through USB port.
· The USB port is located under the cluster.
9 10 8 1 3

2
4
5
6

559A3CD70

11 7
559A3CD70A

Touch Press

or

559A3CD70C

559A3CD70B

· Over 1100 engine rpm, the screen turns into the operation screen with MP4 or codec file
playing for the safety.

No. Function Control No. Function Control

Power mode switch or

1 Previous track 7 Sound volume Speed switch or touch
touch

2 Next track Speed switch or touch 8 Stop ESC/CAM button or touch

3 Play Touch 9 File name -

Current time/
4 Pause Touch 10 -
Total time

Current playing
5 Contents display Touch 11 -
time

6 Mute Touch - - -

4-28
MONITORING SYSTEM (machine serial No.: #0561~)

1) STRUCTURE
The cluster consists of LCD and switches as shown below. The LCD is to warn the operator in case
of abnormal machine operation or conditions for the appropriate operation and inspection.
Also, The LCD is to set and display for modes, monitoring and utilities with the switches.
The switches or touch screen are to set the machine operation modes.
※ The cluster installed on this machine does not entirely guarantee the condition of the machine.
Daily inspection should be performed according to chapter 6, Maintenance.
※ When the cluster provides a warning immediately check the problem, and perform the required
action.

Warning lamps Main menu Warning lamps

(See page 4-32) (See page 4-42) Time display (See page 4-32)

Gauge(See page 4-30)

Pilot lamps(See page 4-38)

Switches(See page 4-40)

HX60A3CD100K

※ The warning lamp pops up, lights ON (on the left-top side) and the buzzer sounds when the
machine has a problem.
The warning lamp lights ON until the problem is cleared. Refer to page 4-32 for details.

4-29
2) GAUGE
(1) Operation screen
When you first turn starting switch ON, the operation screen will appear.

3 5 4 6
HX60A3CD101A

1 Engine coolant temp gauge 3 Fuel level gauge 5 Accel dial

2 Hydraulic oil temp gauge 4 Engine rpm 6 Clinometer

※ Operation screen type can be set by the screen type menu of the display.
Refer to page 4-49 for details.

(2) Engine coolant temperature gauge

① This gauge indicates the temperature of coolant.
·Black range : 40-115˚C (104-239˚F)
·Red range : Above 115˚C (239˚F)
② If the indicator is in the red range or lamp lights ON in red,
turn OFF the engine and check the engine cooling system.
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
290F3CD53
the electric device as that can be caused by the poor
connection of electricity or sensor.

(3) Hydraulic oil temperature gauge

① This gauge indicates the temperature of hydraulic oil.
·Black range : 40-105˚C (104-221˚F)
·Red range : Above 105˚C (221˚F)
② If the indicator is in the red range or lamp lights ON in red,
reduce the load on the system. If the gauge stays in the red
range, stop the machine and check the cause of the problem.
290F3CD54
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
the electric device as that can be caused by the poor
connection of electricity or sensor.

4-30
(4) Fuel level gauge
① This gauge indicates the amount of fuel in the fuel tank.
② Fill the fuel when the red range, or lamp lights ON in red.
※ If the gauge indicates the red range or lamp lights ON in
red even though the machine is on the normal condition, check
the electric device as that can be caused by the poor
connection of electricity or sensor.
HX60A3CD55A

(5) Engine rpm display

Clinometer ① This displays the engine speed.

Engine rpm
HX60A3CD105K

(6) Accel dial display

① This displays acceleration dial level from 0 to 10 step.

290F3CD59

3) COMMUNICATION ERROR AND LOW VOLTAGE WARNING POP-UP

(1) Communication error pop-up
① Cluster displays this communication error pop-up when it has
communication error with MCU.
② Communication error pop-up displays at operation screen only.
Just buzzer alarm at the other screen.
③ If communication with MCU become normal state, it will
disappear automatically.
HX60A3CD107A

(2) Low voltage warning pop-up

① Cluster displays this low voltage warning pop-up when the
battery voltage is low.
② Low voltage warning pop-up displays at operation screen only.
Just buzzer alarm at the other screen.
③ This pop-up will disappear with using touch screen or buzzer
stop switch. While the battery voltage is low, buzzer sounds
every minute.
HX60A3CD108
④ When the battery voltage is higher than 11.5 V, the pop-up off.

4-31
 4) WARNING LAMPS

Battery charging Emergency warning lamp Emission system fail warning lamp
warning lamp

Check engine Air cleaner warning lamp

warning lamp Overload warning lamp
Engine oil pressure Engine coolant temp warning lamp
warning lamp DPF regeneration inhibit warning lamp
Engine stop DPF regeneration acknowledge
warning lamp warning lamp

Fuel level warning lamp DPF warning lamp

Hyd oil temp warning lamp HEST warning lamp
HX60A3CD109C

※ Each warning lamp on the left-top of the LCD pops up on the center of LCD and the buzzer
sounds when the each warning is happened. The pop-up warning lamp moves to the original
position and lights ON when the buzzer stop switch is pushed or the pop-up is touched. And the
buzzer stops. Refer to page 4-41 for the switch.
※ When the warning lamps light ON more than 4, you can check all lamps with next page button
( , ) near the warning lamps.

(1) Engine coolant temperature warning lamp

① The lamp pops up on the center of LCD and the buzzer
sounds when the engine coolant temperature is over 115˚C or
more.
② The pop-up lamp moves to the original position and lights ON
when the buzzer stop switch is pushed or pop-up is touched.
290F3CD61
Also, the buzzer stops and lamp keeps ON.
③ Check the cooling system when the lamp keeps ON.

(2) Hydraulic oil temperature warning lamp

① The lamp pops up on the center of LCD and the buzzer
sounds when the hydraulic oil temperature is over 105˚C or more.
② The pop-up lamp moves to the original position and lights ON
when the buzzer stop switch is pushed or pop-up is touched.
Also, the buzzer stops and lamp keeps ON.
290F3CD62
③ Check the hydraulic oil level and hydraulic oil cooling system.

(3) Fuel level warning lamp

① This warning lamp lights ON and the buzzer sounds when the
level of fuel is below 10%.
② Fill the fuel immediately when the lamp is ON.

290F3CD63

4-32
(4) Emergency warning lamp
① This lamp pops up and the buzzer sounds when each of the
below warnings are happened.
- Engine coolant overheating (over 115˚C)
- Hydraulic oil overheating (over 105˚C)
290F3CD64
- MCU input voltage abnormal
- Accel dial circuit abnormal or open
※ The pop-up warning lamp moves to the original position and
lights ON when the buzzer stop switch is pushed or pop-up is
touched. Also the buzzer stops.
This is same as following warning lamps.
② When this warning lamp lights ON, machine must be checked
and serviced immediately.

(5) Engine oil pressure warning lamp

① This lamp lights ON when the engine oil pressure is low.
② If the lamp lights ON, shut off the engine immediately. Check
oil level.

290F3CD65

(6) Check engine warning lamp

① This lamp lights ON when the communication between
MCU and engine ECM on the engine is abnormal, or if the
cluster received any fault code from engine ECM.
② Check the communication line between them.
If the communication line is OK, then check the fault codes on
290F3CD66
the cluster.
③ Also, this lamp pops up when the level of DPF soot is high.
※ Refer to the page 4-34 for the DPF warning lamp.

(7) Battery charging warning lamp

① This lamp lights ON when the battery charging voltage is low.
② Check the battery charging circuit when this lamp is ON.

290F3CD67

(8) Air cleaner warning lamp

① This lamp lights ON when the filter of air cleaner is clogged.
② Check the filter and clean or replace it.

290F3CD68

4-33
 (9) Overload warning lamp (option)
① When the machine is overload, the overload warning lamp
lights ON during the overload switch is ON. (if equipped)
② Reduce the machine load.
Initiate a manual regeneration

21093CD36

(10) DPF (diesel particulate filter) warning lamp

① This warning lamp lights ON or OFF when the regeneration is
needed.
② This warning lamp lights ON while DPF regeneration inhibit
switch is in "Regeneration ingibited" state, when stationary
regeneration is permitted.
2609A3CD19 ③ This warning lamp lights ON during reset regeneration standby
or in back up mode.
④ This warning lamp lights flash during reset regeneration
standby DPF regeneration inhibit switch is in "Regeneration
inhibited" state.
※ Consequences of delaying regeneration
- Poor performance caused by increasing exhaust gas
pressure.
- Higher fuel consumption
- Shorter filter lifetime

Warning lamp
DPF Check engine Stop engine
Condition Remedy

(pop up) (pop up)

Normal Off Off Off · Automatic regeneration

· Push DPF switch to OFF position if DPF switch
Soot low On Off Off is in inhibit position.
· Engine power may be reduced automatically
(soot medium)
Soot midium Blink Off Off

· Engine power and speed will be reduced

Soot high On On Off automatically
· Initiate a manual regeneration
· Stop the engine immediatary.
Stop On Off On · Please contact your Hyundai service center or
local dealer.

4-34
※ Manual regeneration method of DPF
※ Manual regeneration applies if the machine is in a fireproof
Safety button area and there is no plan to turn off the maching during the
1
2 regeneration.
① Stop and park the machine.
② The accel dial to the lowerest position and operate the engine
in idling.
③ Pull the safety button and push the switch to position ② to
initiate the manual regeneration of DPF.
※ Refer to the page 4-62 for the switch operation.
ACK ※ The engine speed may increase gradually to high idle rpm and
HEST warning DPF regeneration DPF regeneration begins and it will take approximately 25~30
lamp ON ACK lamp ON
minutes.
④ When the manual regeneration starts, the DPF warning lamp
turns OFF and the regeneration acknowledge lamp and HEST
ACK warning lamp will light ON during the regeneration function is
HEST warning DPF regeneration
operating.
lamp OFF ACK lamp OFF ⑤ The regeneration acknowledge lamp and HEST warning lamp
HX603CD143 will light OFF when the regeneration function is completed.

(11) HEST (High exhaust system temperature) warning lamp

① This warning lamp indicates, when illuminated, that exhaust
temperatures are high due to regeneration of the DPF.
② The lamp will also illuminate during a manual regeneration.
③ When this lamp is illuminated, be sure the exhaust pipe outlet
is not directed at any surface or material that can melt, burn, or
2609A3CD21 explode.
When this lamp is illuminated, the exhaust gas temperature
could reach 600
600˚˚C [1112
[1112˚˚F],
], which is hot enough to ignite or
melt common materials, and to burn people.
※ The lamp does not signify the need for any kind of equipment
or engine service; It merely alerts the equipment operator to
high exhaust temperatures. It will be common for the lamp to
illuminate on and off during normal equipment operation as the
engine completes regeneration.

4-35
(12) Emission system fail warning lamp
① This warning lamp indicates there are faults related to the
emission system.
② The lamp lights ON when each of the below warnings is
happened.
a. The EGR valve malfunctions.
300A3CD15
b. Electrical malfunction of the EGR control sensors.
(disconnection, short)
c. Tampering with the EGR control sensors.
③ This warning lamp can be shown together with DPF warning
lamp or engine fail lamp or engine stop warning lamp when
diagsis DPF systems.
※ Please contact your Hyundai service center or local dealer.

(13) DPF regeneration inhibit warning lamp

① This warning lamp indicates, when illuminated, the DPF switch
is pushed inhibit position, therfore automatic and manual
regeneration can not occur.
※ Refer to the page 4-62 for the DPF switch.

2609A3CD20

(14) DPF regeneration acknowledge warning lamp

① This warning lamp lights ON stationary regeneration is in
process.
② This warning lamp lights ON, when stationary regeneration is
in process after DPF regeneration request switch is pressed
ACK
and hold for more than 3 seconds.
559A3CD10 ③ This warning lamp lights flash when stationary regeneration
standby or regeneration interlock switch is in "regeneration
permitted (interlock enabled) status.
④ This warning lamp lights flash while stationary regeneration
standby or back mode, when DPF regeneration inhibit switch
in "Regeneration permitted" status and regeneration interlock
switch is in regeneration permitted status.

(15) Engine stop warning lamp

① If the lamp lights ON, stop the engine immediately and check
the engine.
② Check the fault codes on the monitor.
※ Please contact your Hyundai service center or local dealer.

4-36
5) PILOT LAMPS

Maintenance pilot lamp

Engine preheat pilot lamp

Power mode pilot lamp Auto idle mode pilot lamp

Fuel warmer pilot lamp Travel speed pilot lamp
Optional flow control pilot lamp Auto idle status pilot lamp

HX60A3CD112C

※ The left and the right movement buttons ((◀ and ▶)) are activated when nine indicator or more
light, and touching the button shifts to the previous/next page. The buttons are not activated when
eight indicators or less light.

(1) Mode pilot lamp

Sequence Mode Pilot lamp Selected mode

Heavy duty power work mode

1 Power mode
Standard power mode

Low speed traveling

2 Travel mode
High speed traveling

Auto idle mode

3 Auto idle mode
Auto idle status

(2) Engine preheat pilot lamp

① Turning the start switch ON automatically starts preheating.
② Start the engine after this indicator turns off.
See Page 4-4.

290F3CD79

4-37
(3) Warming up pilot lamp
① This lamp is turned ON when the coolant temperature is below
30˚C (86˚F ).
② The automatic warming up is cancelled when the engine
coolant temperature is above 30˚C, or when 10 minutes have
passed since starting the engine.
290F3CD80

(4) Auto idle status/ mode pilot lamp

Mode pilot lamp ① The auto idle mode pilot lamp will be ON when the idle mode
is selected.
AUTO
② The auto idle status pilot lamp will be ON when all levers and
n/min pedals are at neutral position, and the auto idle mode is
Status pilot lamp selected.
③ One of the lever or pedal is operated, the status lamp will be
OFF and the engine speed returns to the previous conditions.
n/min
85A3CD106

(5) Maintenance pilot lamp

① This lamp will be ON when the consuming parts are needed to
change or replace. It means that the change or replacement
interval of the consuming parts remains below 30 hours.
② Check the message in maintenance information of main menu.
Also, this lamp lights ON for 3 minutes when the start switch is
HX60A3CD116
ON position.
※ Refer to the page 4-46.

4-38
(6) Fuel warmer pilot lamp
① This lamp is turned ON when the coolant temperature is below
10˚C (50˚F ) or the hydraulic oil temperature 20˚C (68˚F ).
② The automatic fuel warming is cancelled when the engine
coolant temperature is above 60˚C, and the hydraulic oil
HX60A3CD111 temperature is above 45˚C since the start switch was ON
position.

(7) Optional flow control pilot lamp

① The indicator lights when activating (performing) the optional
flow control function.
※ Refer to the Page 4-46.

HW60A3CD48A

4-39
6) SWITCHES

Power mode switch Escape switch

Travel speed switch Camera switch
Auto idle switch Buzzer stop switch
Select switch
HX60A3CD117D

※ Selecting the switch displays the indicator on LCD. See Page 4-37 for further information.

(1) Power mode switch

① This switch selects the system power mode, and the selected
power mode indicator is displayed on the indicator position.
·P : High-load work
·S : Standard load work
② The indicators shifts in the sequence of S → P → S.

HX60A3CD118

(2) Select switch

① The switch is used for selecting or changing the menus and in-
put values.
② Knob pressing
·Pressing short (0.5 sec. or less) : Menu selecting
③ Knob turning
This knob is used for changing menus and input values :
·Right turning : Increasing downward direction and input value
HX60A3CD119
·Left turning : Decreasing upward direction and input value

4-40
(3) Auto idle switch
① This switch is used for operating or canceling the auto idle
function.
※ See Page 4-38 for further information.

HX60A3CD120

(4) Buzzer stop switch

① The buzzer sounds when the system fails.
In such a case, press the switch to stop the buzzer. The alarm
indication is kept lit until trouble is resolved.

HX60A3CD121

(5) Camera switch

① Pressing this switch on the operation screen of the main menu
displays the area illuminated by the camera mounted on the
system (if the camera is mounted).
See Page 4-56 for information of the camera.

HX60A3CD122

(6) Escape switch

① This switch is used for return to the previous or the next menu.

HX60A3CD123

(7) Travel speed switch

① This switch is used for changing driving speed.
: High speed
: Low speed
※ Do not operated the driving speed switch during driving.
System stability may adversely be affected.
Rapid change of system stability may cause injury or death of
driver.
HX60A3CD104

4-41
7) MAIN MENU

Tap
Main menu screen or Sub menu screen
Press

Press

HX60A3CD124A HX60A3CD125A

※ See “Selection Switch” on page 4-40 for further information on selection and change of the menus
and input values.
※ Touching the main menu switch, or pressing the selection switch prompts the sub-menu screen.

(1) Structure
No. Main menu Sub-menu Description
Active fault List of active fault of system/engine
Logged fault List of logged fault of system/engine
1 Delete logged fault Deleting specifics of logged fault (system/engine)
Monitoring Monitoring (conditions of system, switch, and output)
Monitoring

Maintenance info. Checking and initialization of service lnterval of oil

and filters
Aux flow setting Optional attachment setting
ELS mode setting ELS mode setting/user password changing
Machine information Information of cluster, MCU, engine system
2 Contact Display and change of contact information for after-
sales services
Management Cluster update System and application updating
Service menu Power shift, Operation hours, Main gauge type,
Display RPM, DPF filter exchange, AVCU setting,
Adding language
Clock adjust Current time setting
Brightness setting Manual, auto
3 Unit setting Temperature, Distance, Pressure, Flow, Volumn
Language selection 24 languages
Display

Entertainment Video/music file playing

Camera setting Setup of number of active cameras, display sequences,
4 and camera numbers
Clinometer setting Initializing slope sensor
Utilities Emergency mode Back-up switch for failed cluster switch

4-42
(2) Monitoring
① Active fault - system

HX60A3CD130A

HX60A3CD131A

· You may use this menu to check active fault of MCU.

② Active fault - engine

HX60A3CD130A

HX60A3CD133A

· You may use this menu to check active fault of engine ECM.

③ Logged fault - system/engine

or

HX60A3CD134A

HX60A3CD135A HX60A3CD136A

· You may use this menu to check fault logged on system MCU or engine ECM.
· The menu is accessible by maintenance engineer only.

4-43
④ Delete logged fault

HX60A3CD143A

HX60A3CD144A HX60A3CD145A

HX60A3CD146A HX60A3CD147A

· Delete logged fault: You are allowed to delete fault logged on system MCU or engine ECM.
(Deletion can be deleted only while the engine is kept stopped.)

⑤ Monitoring (system conditions)

HX60A3CD137A

HX60A3CD138A

· You may use this menu to check the system conditions such as engine rotation rate, oil tempera-
ture, voltage and pressure.

⑥ Monitoring (switch conditions)

HX60A3CD137A

HX60A3CD140A

· You may use this menu to check digital switch information of the system.
· The operation switch lights blue.

4-44
⑦ Monitoring (output conditions)

HX60A3CD137A

HX60A3CD142A

· You may use this menu to check digital output information of the system.
· Output lights blue.

4-45
(3) Management
① Maintenance info.

HX60A3CD158A

HX60A3CD157A HX60A3CD159A

· Elapsed: Time elapsed since inspection and maintenance is displayed.

· Change interval: You are allowed of changing exchange cycle in 50 hours.
· History-Hourmeter: History of inspection, maintenance and exchange is displayed.
· Replacement: Elapsed time is reset to zero.
· Change or replace interval
No Item Interval
1 Engine oil 500
2 Final gear oil 1000
3 Swing gear oil 1000
4 Hydraulic oil 5000
5 Pilot line filter 1000
6 Hydraulic oil return filter 1000
7 Engine oil filter 500
8 Fuel filter 500
9 Pre-filter 500
10 Hydraulic tank breather 1000
11 Air cleaner 1000
12 Radiator coolant 2000
13 Swing gear pinion grease 1000

② Aux flow setting

a. Optional attachment setup

HW60A3CD33OA

HW60A3CD41OA HW60A3CD42O

- Setup up to three optional attachments.

ⓐ Rotary grapple (4-way)
ⓑ Grapple (2-way)
ⓒ Auger (2-way)

※ Each option attachment operating in one of two user modes (Type A and B)

4-46
b. Proportional flow control setting
You may use this menu to set the values of individual option attachments.

a) Rotary setup
·Rotary selecting
RCV, button, and flow setup.

HW60A3CD42O

HW60A3CD51OA

·RCV setup
- It is possible to set operating RCV for
rotary operation to LH or RH .

- Selecting rotary RCV to LH automatically

sets grapple RCV to RH.
HW60A3CD52OA

·Button setup (rotating clockwise)

- Selecting clockwise rotating direction to
LH automatically sets counterclockwise
rotating direction to RH.

HW60A3CD53OA

·Flow setup
- You may set flow between Level
1 and 5.

HW60A3CD54OA

4-47
 b) Grapple setting
·Grapple selection
RCV, button and flow setup

HW60A3CD42O

HW60A3CD61OA

·RCV setup
- It is possible to set RCV for
grapple operation to LH or RH.

- Selecting grapple RCV to RH au-

tomatically sets rotary RCV to LH.
HW60A3CD62OA

·Button setup (Close)

- Setting Close to RH automati-
cally sets Open to LH.

HW60A3CD63OA

·Flow setup
- Setting between Level 1 and 5.

HW60A3CD72OA HW60A3CD64OA

·Never forget to select Change

button once flow setting is
complete.

HW60A3CD42O HW60A3CD71OA

※ Saved setting is stored in each icon, and value finally stored becomes active.
※ You may use any stored values by pressing Icon button.
※ It is possible to perform two user’s settings per attachment (A and B), and to store up to six values.
(Two for 4-way, four for 2-way)

4-48
c) Checking settings

HX60A3CD81OA

HW60A3CD71OA

※ Operating optional attachment function activates the symbol on the bottom of the main screen.

※ You are allowed of checking settings as follows in the course of Menu - Administrator Functions -
Optional Attachment.
(a) Rotary setup
- Rotary RCV setup : LH
- Rotary flow level : 3
- CW direction control : LH
- CCW direction control : RH
(b) Grapple setup
- Grapple RCV setup : RH
- Grapple flow level : 3
- Open control : LH
- Close contro l: RH

③ ESL mode setting

HX60A3CD148A

HX60A3CD149A HX60A3CD150A

- The ESL mode setting is designed to prevent theft and unauthorized operation of the system.
- When selecting the ESL mode setting to continuous operation, password should be entered when
turning the Start button ON.
- Disabled : The ESL mode setting function does not operate.
Continuous operation : Password should be entered whenever operator starts the engine.
Enable(interval): Password should be entered when operator starts the engine first. It is not re-
quired to enter the password until restart within specified time.
You may set the specified time up to two days.
※ Default
efault password : 00000
※ Length of password : 5-10 digits

4-49
 ④ Changing password
- The length of the password is between 5 and 10 digits.

HX60A3CD151A

HX60A3CD149A HX60A3CD153A

Entering current password Selecting Change Password

HX60A3CD156A HX60A3CD155A HX60A3CD149A

Storing new password in MCU Entering new password again Entering new password

⑤ Machine information

HX60A3CD160A

HX60A3CD161A HX60A3CD162A

· On this screen, you may check information of the instrument panel, the system controller (MCU),
the engine and the system.

⑥ Contact

HX60A3CD163A

HX60A3CD164A HX60A3CD165A

· You may check or change the contact information for after-sales services.

4-50
⑦ Cluster update

HX60A3CD169A

HX60A3CD170A HX60A3CD149A

Selecting Cluster Update Entering user’s password

· It is possible to update the cluster and CAN.

※ Do not turn power off while updating.

a. Application update

HX60A3CD172A

HX60A3CD173A HX60A3CD174A

Selecting application items Selecting files to update Selecting OK

HX60A3CD176 HX60A3CD175A

Completed In progress

4-51
b. System update

HX60A3CD177A

HX60A3CD173A HX60A3CD174A

Selecting system items Selecting files to update Selecting OK

HX60A3CD176 HX60A3CD175A

Completed In progress

4-52
⑧ Service menu

HX60A3CD165A

HX60A3CD144A HX60A3CD168A

Entering service password

· Power shift : Set the power shift mode (default/option).

· Operating hours : You may check operating hours of the system in individual modes after
acceptance of the system.
· Main gauge type : It is possible to display engine rotation rate or fuel level on the main gage of
the main screen.
· Display RPM : It is possible to set display of numeric value of engine rotation rate on the main
gauge of the main screen.
· DPF filter exchange : You may initialize parameters relevant to DPF of engine ECU after cleaning
the DPF filter.
· AVCU setting : You may select Standard, 2-Way or 4-Way dependent upon the system options.
· Adding language : It is possible to update language displayed on the cluster when it is required
to correct language.
※ The service menu is accessible by maintenance engineer only. Do not attempt unauthorized
adjustment.

4-53
(4) Display
① Clock adjust

HX60A3CD191A

HX60A3CD192A

· "****-**-**” on the first line indicates year/month/day.

· The second line indicates current time (00:00 - 12:59 am/pm)

② Brightness setting

HX60A3CD193A

HX60A3CD194A HX60A3CD195A
Manual (Level 1 to 10)

HX60A3CD197A HX60A3CD196A
Auto (day/night) Auto (daytime)

· Selecting “Auto” allows setting brightness different in day and night. It is also allowed to set hours
in daytime. (Setting beginning day time and ending day time)

4-54
③ Unit setting

HX60A3CD198A

HX60A3CD199A

- Metric: Units are changed to metric units.

- U.S. units: Units are changed to U.S. units.
- User setting : Units are changed to user setting.

Item Metric system U.S. unit User’s setup

Temperature ˚C ˚F ˚C, ˚F
Distance km mile km, mile
Pressure bar Mpa bar, Mpa, kgf/cm2, psi
Flow lpm gpm lpm, gpm
Volume l gal l, gal

④ Language selection

HX60A3CD200A

HX60A3CD201A

· You may select your language (from 24 languages), and all the information is displayed in the
selected language.

4-55
 (5) Utilities
① Entertainment

HX60A3CD70A

HX60A3CD208A
HX60A3CD209A

· You may play MP4 or CODEC files of detachable hard disk through USB port.
· USB port is on the left of the instrument panel.
· When engine rotation rate exceeds 1100 rpm or higher, the screen is switched to the operation
screen even while MP4 or CODEC file is played for safety. When engine rotation rate drops to
1100 rpm or lower, animation clip is played again.
Do not play animation clip while operating the system to prevent risks of accident.
② Camera setting

HX60A3CD202A

HX60A3CD203A

· You may install three cameras on the system, and set display sequence on this menu.
· If no camera is installed, this menu is disabled.

· When rotating Select switch clockwise, the screen of the next camera is displayed. When rotating
the switch counterclockwise, the screen of the previous camera is displayed. You may also
change the camera channel by touching the screen.
· You may display or hide the mini instrument panel by pressing Select switch or touching the
screen.
(Mini instrument panel displayed → hidden → displayed)

HX60A3CD204

· Pressing ESC switch or touching X icon on the screen terminates the camera mode.

4-56
③ Clinometer setting

HX60A3CD210A

HX60A3CD211A

· Pressing “Default” when the system is kept on flat surface resets X and Y values to zero.
· You may check gradient of the system on the operating screen of the instrument panel.

④ Emergency mode

HX60A3CD205A

HX60A3CD206A

· When the switch or the acceleration dial of the monitor fails, the switch is displayed on LCD, and
you are allowed to perform operation by touching the screen.
· Such operation is allowed only on this mode screen.

4-57
4. SWITCHES

Quick clamp switch(opt)

Wiper switch
Head light switch Washer switch
Work light switch Overload switch(opt)
Travel alarm switch Air compressor switch(opt)
Cab light switch DPF switch
Beacon switch(opt)
Breaker selection switch(opt)
Start switch Switch Master switch
panel 2

Switch
panel 1

Breaker operation switch

Horn switch

559A3CD20

1) STARTING SWITCH
(1) There are three positions, OFF, ON and START.
・ (OFF) : None of electrical circuits activate.
・ (ON) : All the systems of machine operate.
・ (START) : Use when star ting the engine. Release key
immediately after starting.
※ Key must be in the ON position with engine running to maintain
21073CD27 electrical and hydraulic function and prevent serious machine
damage.

4-58
2) ACCEL DIAL
(1) There are 10 dial setting.
(2) Setting 1 is low idle and setting 10 is high idle.
Increase
・By rotating the accel dial to right : Engine speed increased.
・By rotating the accel dial to left : Engine speed decreased.
Decrease

559A3CD34

3) HEAD LIGHT SWITCH

(1) This switch is used to operate the head light.
・Press the switch once, the head light comes ON and the pilot lamp
ON.
・Press the switch once more, the head light and pilot lamp turn off.

555C93CD80

4) WORK LIGHT
(1) This switch is used to operate the work light.
・Press the switch once, the work light comes ON and the pilot lamp
ON.
・Press the switch once more, the work light and pilot lamp turn off.

555C93CD80A

5) TRAVEL ALARM SWITCH

(1) This switch is used to alarm surroundings when the machine travels
to forward and backward.
(2) On pressing this switch, the alarm operates only when the machine
is traveling.

555C93CD83

6) CAB LIGHT SWITCH

(1) This switch turns on the cab light on the cab.
B
A
C

555C93CD83A

4-59
7) BEACON SWITCH (option)
(1) This switch turns ON the rotary light on the cab.
(2) The below indicator lamp is turned ON when operating this switch.

555C93CD30

8) BREAKER SELECTION SWITCH (option)

(1) This switch is used to operate breaker.
※ The breaker operates only when this switch is pressed.

555C93CD37

9) WIPER SWITCH
(1) This switch is used to operate the wiper.
The wiper operates.
※ Wiper motor doesn't operate with front sliding door open.
※ If wiper does not operate with the switch in the ON position, turn the
※ switch off immediately. Check the cause. If the switch remains ON,
※ motor failure can result.
555C93CD91

10) WASHER SWITCH

(1) This switch is used to operate the washer.
・The washer liquid is sprayed and the wiper is operated only while
pressing this switch. If release the switch, return to the first position.

555C93CD92

11) QUICK CLAMP SWITCH (option)

(1) This switch is used to engage or disengage the moving hook on
Lock quick clamp.
Unlock

555C93CD93

4-60
12) MASTER SWITCH
(1) This switch is used to shut off the entire electrical system.
(2) I : The battery remains connected to the electrical system.
O : The battery is disconnected to the electrical system.
※ Never turn the master switch to O (OFF) with the engine running. It
could result in engine and electrical system damage.
OFF 13033CD81

13) HORN SWITCH

(1) This switch is at the top of left side control lever.
Horn switch
On pressing, the horn sounds.

LH RCV lever
5593CD31

14) BREAKER OPERATION SWITCH (option)

Breaker (1) On pressing this switch, the breaker operates only when the breaker
operation switch selection switch on the switch panel is selected.

RH RCV lever
5593CD32

15) AIR COMPRESSOR SWITCH (option, -#0400)

(1) This switch is used to activate the air compressor.
(2) The indicator lamp turned ON when selected this switch.

16) PATTERN CHANGE SWITCH ((option,

16 option, #0401-)
Safety button ① The pattern change can be operated easily using this switch.
·Position ISO : ISO type pattern
·Position A : A type pattern
O
IS

※ Before starting the machine, check switch position.

※ Refer to the page 4-22 for the details.
559A3CD23

4-61
17) DPF (diesel particulate filter) SWITCH

Safety button (1) This switch is used to select the regeneration function of the DPF.
1 (2) Inhibit position (①)
2
① The inhibit position disallows any automatic or manual regeneration
of the DPF.
② This may be used by operator to prevent regeneration when the
2609A3CD10
machine is operating in a hazardous environment concerned about
high temperature.
③ It is strongly recommended that this position is only activated when
high temperatures may cause a hazardous condition.
(3) OFF position
This position will initate a automatic regeneration of the DPF.
(4) Manual regeneration position (②)
① This position will only initate a manual regeneration of the DPF
when the machine is in non-mission condition, engine must run at
low idle speed and DPF soot levels are high enough to allow
regeneration.
② HEST lamp will be illuminated during the entire regeneration.
※ Refer to the page 4-9 for details.
※ This switch can be move to the manual regeneration position ((②))
only when the safety button is pulled to backward.
※ Also, this switch return to the OFF position when released the
manual regeneration position ((②).
).

18) OVERLOAD SWITCH (option)

(1) When this switch pressed ON position, buzzer makes sound and
overload warning lamp comes ON in case that the machine is
overload.
(2) When it pressed OFF position, buzzer stops and warning lamp goes
out.

559A3CD39

4-62
 ·ELECTRICAL

SAFTY
CAN_L
CAN_H
GROUND
EPPR CLAMP (A2)

EPPR RELEASE(A1)

DESTINATION
DESTINATION
DESTINATION
EPPR ROTATE RIGHT(A)
EPPR ROTATE LEFT(B)

START RY COIL(-)

NC
PREHEAT COIL (-)

CAMERA_SHIELD
CAMERA IG
OVERLOAD PS(MCU)

NC
OVERLOAD SENSOR
START RY COIL(+)

PATTERN CHANGE
PATTERN CHANGE
QUICK COUPLER SOL
PREHEAT COIL (+)

TRAVEL ALARM
NC
DPF-REGEN

CAN_SHIELD
BATT.RY(IG)

CAMERA_2
NC
NC
NC
REGEN-SW-COM

HOUR METER
EGR VALVE ECU

DPF- NON REGEN

EGR VALVE RY_C

NC

CLUSTER GND
CAMERA_3
WORK LAMP
NC

CAN_Hi
PREHEAT CONTACT

START RY CONTACT
8
7
6
5
4
3
2
1

CAN_Lo
WASHER P/P
SOL FUSE
ECM_POWER 12V
ECM_POWER 12V
ECM_IG

AC COMP
BATT. RY

HORN RY(JOYSTICK)

CONDENSOR FAN
CONDENSOR FAN
AC DPS
AC DPS
FUEL FILLER PUMP

BREAK SIG(JOYSTICK)
MCU IG
NC

NC
NC

SAFETY SOL
CN-264

HEAD LAMP
NC

ALT
HORN

SW MASTER
MCU B+

FUEL FEED P/P

BREAKER SOL
NC
SAFETY LEVER RY CONTACT

CIGARLIGHTER/WASHER P/P

START SIG.
NC

NC
NC
NC
NC
NC

GND
GND

NC
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10

NO.
NO.
9
8
7
6
5
4
3
2
1

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
NO.

2
1

2
1
EARTH 1
EARTH 2

SHIELD
CN-312

CAMERA_2
CAMERA_3
MAIN_GND
POWER_IG
1 0.75 FLRY-B B PORT ANGLE DOZER L OR

2
2
1

9
8
7
5
9
8
7
5

4
1
4
1

6
6

3
3

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10
2

9
8
7
5
B PORT- RORATING(LEFT)

4
1

6
3
0.75 FLRY-B

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

2
1
2

2
1
2

CN-5
CN-8
CN-4
ELECTRICAL CIRCUIT (1/3)

0.75 FLRY-B A PORT - ANGLE DOZER R OR

CN-13
CN-14

AUX-CAMERA
6
5
4
3
2
1
3
1
A PORT- RORATING(RIGHT)

1.25
0.75 FLRY-B

1.25
1.25
4

0.8
0.8
0.8

CN-259
2

0.8
0.8

0.8
0.8
0.8
0.8
1.25

1.25

Pa
0.8B
R
5

0.8
0.8
2.0
0.8

0.8
0.8
0.8
0.8

0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8

W
1

1.25
1.25

1.25

1.25
1.25
6
2

1.2R

1
2
1.2W

0.8Gr

2
1
1.2ROr

CD-1
- MACHINE SERIAL NO. : -#0719

R 5.0SQ

CD-10
CD-2
W 8.0SQ
CN-81

8.0SQ
8.0SQ
TRAVEL BZ

36
73
3E
0.75BrW 131

B
80

Or
YW

YR
FUEL SENDOR

HYD OIL TEMP

AIR CLEANER SW
GROUP 3 ELECTRICAL CIRCUIT

3.0
2
1

2
1
E1

CN-20
A2 CLAMP B
1
GOr

A1 RELEASE
1
2
2
CN-62A
CN-25
HORN

B
1
1 GOr
2
2
CN-62B
CN-145

PATTERN CHANGE
M R CN-12
2 CL-5
B B 1 B

FUEL
1 1 1
Br 2 RL
2 2

FEED P/P
2 R
1 B CL-6

sig
sig
sig
B

DO-2
1
RL
2
WORK LAMP

SUPPLY
SUPPLY
SUPPLY
3 2B
E1

B
A
B
A
B
A

RETURN C
RETURN C
RETURN C

BOOM PS

PRESS(A)
WORKING
CD-31

CD-32
OVERLOAD

CD-7
CN-29
YR
2 Pa
LW
1

CN-28
LW
CN-51
1.2B 3E
TRAVEL SPEED SOL(DO) 1
ENG. FEED P/P(DO) 2 CN-140
B
ANTI RESTART RY(D.O) 3 1
LW
R/DRYER AC COMP SOL

SPARE(D.I) 4 2
QUICK

E/G OIL PS(DI) 5

TRAVEL HI SLECT SIG(DI) 6
CN-22
TRAVEL Lo SLECT SIG(DI) 7 OrW
2 M
TRAVEL NEUTRAL SLECT SIG(DI) 8 Gr
P/P

1
TRAVEL FWD SLECT SIG(DI) 9
COUPLER WASHER

BOOM SWING PS(DI) 10

AIR CLEANER SW(DI) 11
WATER SEPERATOR SIG(DI) 12 CS-16
G
AUTO CRUISE SELECT SIG(DI) 13
0.8GrW 76 R
2 1

TRAVEL DI (ECHO) 14
BRAKE PS Lo(AI) 15
Gr
WOKIG PS SENSOR(AI) 16
FUEL PUMP SW

ACCEL DIAL SIG(AI) 17

FUEL SENDER(AI) 18 CN-61
12V POWER OUTPUT 19 B
0.8V 70 M
ALT. LEVEL(AI) 20 R
EPPR(+)(AI) 21
E1
FUEL PUMP

BATTERY POWER 22
0.8L 2
POWER IG 23 CN-66
CRUISE SOL(DO) L
24 2
RAMLOCK SOL. 25 B
SOL.

1
PRE-HEAT RY(DO) 26
TRAVEL BUZZER 27
BREAKER

NC 28
RAMLOCK SW_OFF(DI) 29 CN-83
RAMLOCK SW_ON(DI) 30 GR
2
RAMLOCK SW_AUTO(DI) 3B
31
FAN

M
1
MODE_PARKING(DI) 32
AC CON

MODE_WORKING(DI) 33
E1

MODE_TRAVEL(DI) 34
TRAVEL BUZZER SEL. SIG(DI) 35
BRAKE LAMP"ON" SIG(DI) 36
HIGH BEAM SIG(DI)
CN-70
37 RW

MCU
2
BOOM UP PS 38 Gr
SOL.

1
WORKING BRAKE SENSOR(AI) 39
TRAVEL

POTENTIOMETER SIG(AI) 40
HYD. TEMP SENSOR(AI) 41
CN-68
Y
5V POWER OUTPUT
2
42 B
1
SOL.

NC 43
NC 44
SAFETY

EPPR(-)(AO) 45
MAIN GND
CL-3
46 B
1
MAIN GND 47 12 RW
SAFETY SOL(DO)
2
48
FUEL WARMER(DO) 49
B
BRAKE LAMP CUT RY(DO) 50 1
12A RW
HOUR METER 2
HEAD LAMP

51
PROGRAM DUMP(DI) 52 CL-4
GND COM 53
RS232_RX(2) 54
RS232_TX(2) 55
RS232_RX(1) 56
CS-4
1 3 2
RS232_TX(1) 57
J1939 CAN_Lo(2)C 2
58
J1939 CAN_Hi(2) 3 1
59
J1939 CAN_Lo(1)E 60 CS-4A
SAFETY SW

1 3 2
J1939 CAN_Hi(1) 61
NC
6 2
62
TRAVEL FWD SENSOR(AI)
5 3 1
63
4
OVERLOAD PS 64
36 0.8Gr 3 42 0.8Gr
COOLANT TEMP(AI) 65 Gr 1
99 0.8W 2 43 0.8W
GND_SENSOR 66
37 0.8B 1 44 0.8B CN-7
NC 67 L 2
TACHO SIG(+) 68
CN-16 1
1RW CS-5
SPARE(MOTOR-) 2 2
69 Lg R
HORN

2G
SPARE(MOTOR+) 3 1
70 CS-47
LH JOYSTICK

4 2
B
(GUN)
BOOM
SWING

CN-126 5 1

2.5k

2.5k
B 51 Gr
1 6
G 72 B

12V+

CAN_L

NC
2 7

GND
CAN_H

NC
2

6
5
4
1

3
R 73 Gr
8

CN-16B
3

6
5
4
3
2
1

RS232
Gr

CONN.
BW 57 L 1

CN-148
4 9
R

SERVICE TOOL
3 2B 10

0.8B
0.8W
R L 2

0.8Gr

0.5
0.5
0.5
0.5
11
B 1 CS-29
12 2
Y Lg 2 B

69
68
67
13 1
B GW 3 CS-26

K65
K75
K53
K90
3 GW
14 2
RH JOYSTICK

G G 4 4 G R
15 1
(GUN) BREAKER

CN-93A RW RW 5
2.0R K01 16
POWER 12V 1 Gr Gr 6
2.0B K02 17
MAIN_GND 2 GOr GOr 7
2.0R K03 18
POWER 12V 3 W W 8
2.0B K04 19 CL-2
MAIN_GND 4 B B 9 5 RW
2.0R K05 20 1
POWER 12V 5 6 Gr
2.0B K06 2

4-63
MAIN_GND 6 1B B
3
NC 9
NC 10
CIGAR LIGHTER

SPEED PERMISSION(OPT) 13 CN-142

STARTER PERMISSION1(OPT) 14 7 GOr
0.5Br K15 A +
ENG. OIL PS 15 8 W
B S
SPEED SW2(OPT) 16 9 B
C -
HIGH IDLE SW 17
ACCEL DIAL

0.5LW K18 1
DPF REGEN SW 18
SPEED SW1(OPT) 19 2
0.5G K20
INTAKE THROTTLE 20
0.5BW K21
NEW TEMP SENSOR 21
ACCELERATOR3(OPT) 22
0.5R
46

K23
46A

46

INTAKE THROTTLE 23
0.5R K24
DPF PRESSURE SENSOR 24
L
B
L
L
B

DPF REGEN LAMP 25

ISOCHRONOUS LAMP 26
2
1
1
2
1
2

NO DPF REGEN LAMP 27

0.5P K28
CN-81
CD-11
CD-12

START RY COIL(-) 28
Pa
Pa

LAMP,SW COM 29
0.5Y K31
TRAVEL BZ

NON DPF REGEN SW 31

0.5L K33
TRAVEL ALARM PS

EGR. TEMP SENSOR 33

0.5G K35
KEY. START SIG. 35
ANALOG RESERVE 36
DROOP SW(OPT) 37
STARTER PERMISSION2 SW(OPT) 38
0.5W K39
EGR PRESSURE SENSOR 39
WATER SEPARATOR SW,LAMP 40
AIR-CLEANER SW,LAMP 41
HIGH IDLE LIMIT SW(OPT) 42
0.5R K43
ACCELERATOR1(5v) 43
ACCELERATOR3(OPT) 44
0.5R K45
EGR Ps SENSOR(5V) 45
ACCELERATOR2(5V) 46
LOAD FACTOR OUTPUT(OPT) 47
FAIL LAMP 3 (OPT) 48
COOLANT TEMP WARN.(OPT) 49
PREHEAT LAMP (OPT) 50
SW,LAMP COM (DPF SW) 51
0.5Br K52
INTAKE THROTTLE 52
0.5L K53
YDT(CAN2_L) 53
0.5P K54
EGR VALVE 54
ACCELERATOR3 55
0.5Y K56
DPF OUTLET TEMP 56
ACCELERATOR3 58
NC 59
0.5P K61

ECU
ACCELERATOR1 61
0.5B K62
ACCEL_GND 62
0.5L K63
DPF PRESSURE SENSOR 63
0.5B K65
YDT(GND) 65
0.5RW K66
ALT LEVEL 66
ENG STOP SW2 67
0.5L K68
EGR VALVE RY(+) 68
0.5LW K70
GLOW RY COIL(+) 70
PRELIMINARY LAMP 71
AEX3SQ

FAILURE LAMP2 72
1.25G K73
START RY COIL(+) 73
0.5B K74
EGR PRESSURE SENSOR 74
0.5Y K75
YDT(CAN2_H) 75
0.5L K76
EGR VALVE 76
0.5B K77
DPF SENSOR_GND 77
0.5P K79
NEW TEMP SENSOR 79
0.5Br K80
DPF INTERMEDIATE TEMP 80
0.5RW K81
CN-100

DPF INLET TEMP 81

ACCELERATOR2 83
ACCELERATOR2 84
0.5Y K85
EGR PRESSURE SENSOR 85
0.5Or K86
REGERATION INTERLOCK SW 86
0.5B K87
SWITCH COM 87
AEX3SQ

1.25Or K88
IG POWER 88
ACCELERATOR3 89
0.5Or K90
YDT(12V) 90
FAILURE LAMP3 92
BUZER 93
COOLANT TEMP LAMP 94

CN-93B
1.25Or A01
INJECTOR 2 1
1.25Br A02
INJECTOR 3 2
1.25Y A04
SUPPLY PUMP 4
1.25P A05
SUPPLY PUMP 5
0.5R A07
PRESSURE SENSOR_RAIL 7
0.5RW A08
CAM SPEED SENSOR 8
0.5L A11
FUEL TEMP SENSOR 11
0.5G A12
DPF PRESSURE SENSOR 12
DISPLAY OF SPEEDCHARGE LAMP 15
1.25R A16
INJECTOR 4 16
1.25L A17
INJECTOR 1 17
1.25Y A19
INTAKE THROTTLE 19
1.25LW A20
INTAKE THROTTLE 20
0.5BW A25
PRESSURE SENSOR_RAIL 25
0.5G A26
PRESSURE SENSOR_RAIL 26
0.5G A28
ECU

COOLANT WATER TEMP 28

0.5L A29
COOLANT WATER TEMP 29
BUZZER+ 30
1.25YG A31
INJECTOR 2 31
1.25G A32
INJECTOR 3 32
1.25LW A33
INJECTOR 4 33
APPROVAL DPF REGEN LAMP 34
0.5L A37
CAM SPEED SENSOR 37
0.5B A38
CRANK REV SENSOR SHIELD 38
0.5P A39
CRANK REV SENSOR 39
1.25W A47
INJECTOR 1 47
1.25R A50
COM IG POWER 50
0.5BrW A51
FUEL TEMP SENSOR 51
0.5BL A52
CAM SPEED SENSOR 52
0.5Or A54
CRANK REV SENSOR 54
1.25R A60
COM IG POWER 60
0.5 A59
IM TEMP SENSOR 59
A51
A11
K56
A38
A54
A39
A52
A37
A08
A25
A26
A07
K33
A59
A20
A19
K52
K20
K23
K76
K54
B42
A29
A28
K21
K79
K74
K39
K85
K45
B

0.5
0.5
0.5

REV
BrW

SENSOR

A05
A04
A02
A32
A01
A31
A17
A47
A16
A33
0.5L
0.5L
0.5L
0.5L

0.5B
0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

0.5G
0.5G
0.5G
0.5W

0.5Br

0.5Or

SENSOR
FUEL TEMP
0.5BL
1.25Y
BOOB 1.25B

CRANK
0.5BW
0.5BW

0.5RW
1.25Or

38
0.5BrW
1.25LW
K63 0.5L

CAM SPEED
K77 0.5B
K24 0.5R

A12 0.5G

K80 0.5Br
K81 0.5RW

36

37
1
2

1.25L

1.25P
1.25Y
A04A 1.25Y

A05A 1.25Y
1.25R

1.25G
CK

1.25W
CM

1.25Br
1.25Or
1.25YG
1.25LW
2
2
2

5
5
5

4
1
4
1
4
1

9
8
7
6
9
8
7
6
8
7
6

3
3
3

12
10
12
10

11
11

2
1

2
1

2
1

39
41
40

CN-303
CN-302
CN-301
CR-1

5
4
1

9
8
7
6
3

12
10
11
42
0.5L

0.5B
0.5R

0.5G

0.5L
0.5L
0.5L
0.5L
BATT RY

0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

CN-304
0.5G
0.5G
0.5G
0.5W

0.5Br

43
0.5Or
0.5BL
1.25Y
1.25B

0.5BW
0.5BW

0.5RW
1.25Or

0.5BrW
1.25LW

5R
64
65

43
G12
64 5R
65 5W

0.5Br K80
0.5RW K81
K77
A12
K63
K24

10W
14E

1
1.25L

1.25P
1.25Y
1.25Y

1.25P
1.25R

1.25G
1.25W

1.25Br
K15A

1.25Or

1
1.25YG
1.25LW

2
2
30
Br

86
GrW

3
B

1
BW
5R
K15

5W

4 2
WATER NEW
66

TEMP TEMP
86
30

85
87

5
G13

M
B
A

44

70A
67

2
60R

CR-23
M

6
B+
36 Gr

EGR
RS-1

38 LW
30 8W

67 5W
0.85

3W 120

1
TEMP
5R

V
5R
5R

87
30
B
A

10W
10W

CN-45

1
5W
START RY
RESISTOR

85
86

74
45
85

1
1
2

39

2
M

2
2
1
2
1

2
"B" TERM.

86
30

85

RP

1
87

3
6
5
4
3
2
1
CN-60

2
1
2
1
1
2
3
4
5
6
L

RAIL
P
S
CN-95

BATTERY

3 70A
TO:STARTER

B+

4
CR-24
60B

ALT

2
2

1
1
CN-300B

2
1
2
1
Pa

CN-300C

2
1
IM TEMP
SENSOR SENSOR
87
30
CN-74

3~

INTAKE THROTTOLE EGR VALVE

1
2
CD-18

CN-300A
2

1
G
95A

U
30A

Pre-heater
DO-1

1
85
86
RS-2

2
M

2
FUSIBLE LINK
ENG OIL PRESS

MOTOR

AIR-HEATER RY

INJECTOR 4

INJECTOR 2

INJECTOR 1
CN-80

INJECTOR 3
TEMP
TEMP

SENSOR SENSOR
RESISTOR

STARTER

EGR PRESS SENSOR

SUPPLY PUMP

DPF PRESS
PRESS EXT. TEMP
(GRAY)
(BLACK)
DPF MID

YANMAR SIDE
DPF INLET

20M9-95023-01
 SAFTY
CAN_L
CAN_H
GROUND
EPPR CLAMP (A2)

EPPR RELEASE(A1)

DESTINATION
DESTINATION
DESTINATION
EPPR ROTATE RIGHT(A)
EPPR ROTATE LEFT(B)

START RY COIL(-)

NC
PREHEAT COIL (-)

CAMERA_SHIELD
CAMERA IG
OVERLOAD PS(MCU)

NC
OVERLOAD SENSOR
START RY COIL(+)

PATTERN CHANGE
PATTERN CHANGE
QUICK COUPLER SOL
PREHEAT COIL (+)

TRAVEL ALARM
NC
DPF-REGEN

CAN_SHIELD
BATT.RY(IG)

CAMERA_2
NC
NC
NC
REGEN-SW-COM

HOUR METER
EGR VALVE ECU

DPF- NON REGEN

EGR VALVE RY_C

NC

CLUSTER GND
CAMERA_3
WORK LAMP
NC

CAN_Hi
PREHEAT CONTACT

START RY CONTACT
8
7
6
5
4
3
2
1

CAN_Lo
WASHER P/P
SOL FUSE
ECM_POWER 12V
ECM_POWER 12V
ECM_IG

AC COMP
BATT. RY

HORN RY(JOYSTICK)

CONDENSOR FAN
CONDENSOR FAN
AC DPS
AC DPS
FUEL FILLER PUMP

BREAK SIG(JOYSTICK)
MCU IG
NC

NC
NC

SAFETY SOL
CN-264

HEAD LAMP
NC

ALT
HORN

BREAKER RETURN SOL

SW MASTER
MCU B+

FUEL FEED P/P

BREAKER SOL
SAFETY LEVER RY CONTACT

CIGARLIGHTER/WASHER P/P

START SIG.
NC

NC
NC
NC
NC
NC

GND
GND

NC
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10

NO.
NO.
9
8
7
6
5
4
3
2
1

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
NO.

2
1

2
1
EARTH 1
EARTH 2

SHIELD
CN-312

CAMERA_2
CAMERA_3
MAIN_GND
POWER_IG
1 0.75 FLRY-B B PORT ANGLE DOZER L OR

2
2
1

9
8
7
5
9
8
7
5

4
1
4
1

6
6

3
3

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10
2

9
8
7
5
B PORT- RORATING(LEFT)

4
1

6
3
0.75 FLRY-B

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

2
1
2

2
1
2

CN-5
CN-8
CN-4
0.75 FLRY-B A PORT - ANGLE DOZER R OR

CN-13
CN-14

AUX-CAMERA
6
5
4
3
2
1
3
1
A PORT- RORATING(RIGHT)

1.25
0.75 FLRY-B

1.25
1.25
4

0.8
0.8
0.8

CN-259
2

0.8
0.8

0.8
0.8
0.8
0.8
1.25

1.25

Pa
0.8B
R
5

0.8
0.8
2.0
0.8

0.8
0.8
0.8
0.8

0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8

W
1

1.25
1.25

1.25

1.25
1.25
6
2

1.2R

1
2
1.2W

0.8Gr

2
1
1.2ROr

CD-1
R 5.0SQ

CD-10
CD-2
W 8.0SQ
CN-81

8.0SQ
8.0SQ
TRAVEL BZ

36
73
3E
0.75BrW 131

B
80

Or
YW

YR
FUEL SENDOR

HYD OIL TEMP

AIR CLEANER SW
3.0
- MACHINE SERIAL NO. : #0720-#0753

2
1

2
1
CN-20
A2 CLAMP

B
1
E1

1 A1 RELEASE GOr
2
2
CN-62A
CN-25
HORN

B
1
1 GOr
2
2
CN-62B
CN-145

PATTERN CHANGE
M R CN-12
2 CL-5
B B 1 B

FUEL
1 1 1
Br 2 RL
2 2

FEED P/P
2 R
1 B CL-6

sig
sig
sig
B

DO-2
1
RL
2
WORK LAMP

SUPPLY
SUPPLY
SUPPLY
3 2B

B
A
B
A
B
A

RETURN C
RETURN C
RETURN C
E1

BOOM PS

PRESS(A)
WORKING
CD-31

CD-32
OVERLOAD

CD-7
CN-29
YR
2 Pa
LW
1

CN-28
LW
CN-51
1.2B 3E
TRAVEL SPEED SOL(DO) 1
ENG. FEED P/P(DO) 2 CN-140
B
ANTI RESTART RY(D.O) 3 1
LW
R/DRYER AC COMP SOL

SPARE(D.I) 4 2
QUICK

E/G OIL PS(DI) 5

TRAVEL HI SLECT SIG(DI) 6
CN-22
TRAVEL Lo SLECT SIG(DI) 7 OrW
2 M
TRAVEL NEUTRAL SLECT SIG(DI) 8 Gr
P/P

1
TRAVEL FWD SLECT SIG(DI) 9
COUPLER WASHER

BOOM SWING PS(DI) 10

AIR CLEANER SW(DI) 11
WATER SEPERATOR SIG(DI) 12 CS-16
G
AUTO CRUISE SELECT SIG(DI) 13
0.8GrW 76 R
2 1

TRAVEL DI (ECHO) 14
BRAKE PS Lo(AI) 15
Gr
WOKIG PS SENSOR(AI) 16
FUEL PUMP SW

ACCEL DIAL SIG(AI) 17 CN-61

FUEL SENDER(AI) 18 B M
12V POWER OUTPUT 19 R
0.8V 70
PUMP

ALT. LEVEL(AI) 20
EPPR(+)(AI) 21
CN-66
BATTERY POWER 22 L
0.8L 2 2
POWER IG 23 B
SOL

1
CRUISE SOL(DO) 24
FUEL BREAKER

RAMLOCK SOL. 25
CN-66P
PRE-HEAT RY(DO) 26 0.75B
2
TRAVEL BUZZER 27 0.75G
1
NC 28
RAMLOCK SW_OFF(DI) 29 DO-20
0.75G
RAMLOCK SW_ON(DI) 2
BREAKER

30 0.75B
RAMLOCK SW_AUTO(DI) 31 1
RETURN SOL

MODE_PARKING(DI) 32
MODE_WORKING(DI) 33 CN-83
GR
MODE_TRAVEL(DI) 34 2
FAN

3B M
TRAVEL BUZZER SEL. SIG(DI) 35 1
BRAKE LAMP"ON" SIG(DI) 36
HIGH BEAM SIG(DI)
CN-70
37 RW

MCU
2
BOOM UP PS 38 Gr
SOL.

1
WORKING BRAKE SENSOR(AI) 39
AC CON TRAVEL

POTENTIOMETER SIG(AI) 40
HYD. TEMP SENSOR(AI) 41
CN-68
Y
5V POWER OUTPUT
2
42 B
1
SOL.

NC 43
NC 44
SAFETY

EPPR(-)(AO) 45
MAIN GND
CL-3
46 B
1
MAIN GND 47 12 RW
SAFETY SOL(DO)
2
48
FUEL WARMER(DO) 49
B
BRAKE LAMP CUT RY(DO) 50 1
12A RW
HOUR METER 2
HEAD LAMP

51
PROGRAM DUMP(DI) 52 CL-4
GND COM 53
RS232_RX(2) 54
RS232_TX(2) 55
RS232_RX(1) 56
CS-4
1 3 2
RS232_TX(1) 57
J1939 CAN_Lo(2)C 2
58
J1939 CAN_Hi(2) 3 1
59
J1939 CAN_Lo(1)E 60 CS-4A
SAFETY SW

1 3 2
J1939 CAN_Hi(1) 61
NC
6 2
62
TRAVEL FWD SENSOR(AI)
5 3 1
63
4
OVERLOAD PS 64
36 0.8Gr 3 42 0.8Gr
COOLANT TEMP(AI) 65 Gr 1
99 0.8W 2 43 0.8W
GND_SENSOR 66
37 0.8B 1 44 0.8B CN-7
NC 67 L 2
TACHO SIG(+) 68
CN-16 1
1RW CS-5
SPARE(MOTOR-) 2 2
69 Lg R
HORN

2G
SPARE(MOTOR+) 3 1
70 CS-47
LH JOYSTICK

4 2
B
(GUN)
BOOM
SWING

CN-126 5 1

2.5k

2.5k
B 51 Gr
1 6
G 72 B

12V+

CAN_L

NC
2 7

GND
CAN_H

NC
2

6
5
4
1

3
R 73 Gr
8

CN-16B
3

6
5
4
3
2
1

RS232
Gr

CONN.
BW 57 L 1

CN-148
4 9
R

SERVICE TOOL
3 2B 10

0.8B
0.8W
R L 2

0.8Gr

0.5
0.5
0.5
0.5
11
B 1 CS-29
12 2
Y Lg 2 B

69
68
67
13 1
2B ECM CASE SHIED B GW 3 CS-26

K65
K75
K53
K90
3 GW
14 2
RH JOYSTICK

G G 4 4 G R
15 1
(GUN) BREAKER

CN-93A RW RW 5
2.0R K01 16
POWER 12V 1 Gr Gr 6
2.0B K02 17
MAIN_GND 2 GOr GOr 7
2.0R K03 18
POWER 12V 3 W W 8
2.0B K04 19 CL-2
MAIN_GND 4 B B 9 5 RW
2.0R K05 20 1
POWER 12V 5 6 Gr
2.0B K06 2
MAIN_GND 6 1B B
3

4-63-1
NC 9
NC 10
CIGAR LIGHTER

SPEED PERMISSION(OPT) 13 CN-142

STARTER PERMISSION1(OPT) 14 7 GOr
0.5Br K15 A +
ENG. OIL PS 15 8 W
B S
SPEED SW2(OPT) 16 9 B
C -
HIGH IDLE SW 17
ACCEL DIAL

0.5LW K18 1
DPF REGEN SW 18
SPEED SW1(OPT) 19 2
0.5G K20
INTAKE THROTTLE 20
0.5BW K21
NEW TEMP SENSOR 21
ACCELERATOR3(OPT) 22
0.5R
46

K23
46A

46

INTAKE THROTTLE 23
0.5R K24
DPF PRESSURE SENSOR 24
L
B
L
L
B

DPF REGEN LAMP 25

ISOCHRONOUS LAMP 26
2
1
1
2
1
2

NO DPF REGEN LAMP 27

0.5P K28
CN-81
CD-11
CD-12

START RY COIL(-) 28
Pa
Pa

LAMP,SW COM 29
0.5Y K31
TRAVEL BZ

NON DPF REGEN SW 31

0.5L K33
TRAVEL ALARM PS

EGR. TEMP SENSOR 33

0.5G K35
KEY. START SIG. 35
ANALOG RESERVE 36
DROOP SW(OPT) 37
STARTER PERMISSION2 SW(OPT) 38
0.5W K39
EGR PRESSURE SENSOR 39
WATER SEPARATOR SW,LAMP 40
AIR-CLEANER SW,LAMP 41
HIGH IDLE LIMIT SW(OPT) 42
0.5R K43
ACCELERATOR1(5v) 43
ACCELERATOR3(OPT) 44
0.5R K45
EGR Ps SENSOR(5V) 45
ACCELERATOR2(5V) 46
LOAD FACTOR OUTPUT(OPT) 47
FAIL LAMP 3 (OPT) 48
COOLANT TEMP WARN.(OPT) 49
PREHEAT LAMP (OPT) 50
SW,LAMP COM (DPF SW) 51
0.5Br K52
INTAKE THROTTLE 52
0.5L K53
YDT(CAN2_L) 53
0.5P K54
EGR VALVE 54
ACCELERATOR3 55
0.5Y K56
DPF OUTLET TEMP 56
ACCELERATOR3 58
NC 59
0.5P K61

ECU
ACCELERATOR1 61
0.5B K62
ACCEL_GND 62
0.5L K63
DPF PRESSURE SENSOR 63
0.5B K65
YDT(GND) 65
0.5RW K66
ALT LEVEL 66
ENG STOP SW2 67
0.5L K68
EGR VALVE RY(+) 68
0.5LW K70
GLOW RY COIL(+) 70
PRELIMINARY LAMP 71
AEX3SQ

FAILURE LAMP2 72
1.25G K73
START RY COIL(+) 73
0.5B K74
EGR PRESSURE SENSOR 74
0.5Y K75
YDT(CAN2_H) 75
0.5L K76
EGR VALVE 76
0.5B K77
DPF SENSOR_GND 77
0.5P K79
NEW TEMP SENSOR 79
0.5Br K80
DPF INTERMEDIATE TEMP 80
0.5RW K81
CN-100

DPF INLET TEMP 81

ACCELERATOR2 83
ACCELERATOR2 84
0.5Y K85
EGR PRESSURE SENSOR 85
0.5Or K86
REGERATION INTERLOCK SW 86
0.5B K87
SWITCH COM 87
AEX3SQ

1.25Or K88
IG POWER 88
ACCELERATOR3 89
0.5Or K90
YDT(12V) 90
FAILURE LAMP3 92
BUZER 93
COOLANT TEMP LAMP 94

CN-93B
1.25Or A01
INJECTOR 2 1
1.25Br A02
INJECTOR 3 2
1.25Y A04
SUPPLY PUMP 4
1.25P A05
SUPPLY PUMP 5
0.5R A07
PRESSURE SENSOR_RAIL 7
0.5RW A08
CAM SPEED SENSOR 8
0.5L A11
FUEL TEMP SENSOR 11
0.5G A12
DPF PRESSURE SENSOR 12
DISPLAY OF SPEEDCHARGE LAMP 15
1.25R A16
INJECTOR 4 16
1.25L A17
INJECTOR 1 17
1.25Y A19
INTAKE THROTTLE 19
1.25LW A20
INTAKE THROTTLE 20
0.5BW A25
PRESSURE SENSOR_RAIL 25
0.5G A26
PRESSURE SENSOR_RAIL 26
0.5G A28
ECU

COOLANT WATER TEMP 28

0.5L A29
COOLANT WATER TEMP 29
BUZZER+ 30
1.25YG A31
INJECTOR 2 31
1.25G A32
INJECTOR 3 32
1.25LW A33
INJECTOR 4 33
APPROVAL DPF REGEN LAMP 34
0.5L A37
CAM SPEED SENSOR 37
0.5B A38
CRANK REV SENSOR SHIELD 38
0.5P A39
CRANK REV SENSOR 39
1.25W A47
INJECTOR 1 47
1.25R A50
COM IG POWER 50
0.5BrW A51
FUEL TEMP SENSOR 51
0.5BL A52
CAM SPEED SENSOR 52
0.5Or A54
CRANK REV SENSOR 54
1.25R A60
COM IG POWER 60
0.5 A59
IM TEMP SENSOR 59
A51
A11
K56
A38
A54
A39
A52
A37
A08
A25
A26
A07
K33
A59
A20
A19
K52
K20
K23
K76
K54
B42
A29
A28
K21
K79
K74
K39
K85
K45
B

0.5
0.5
0.5

REV
BrW

SENSOR

A05
A04
A02
A32
A01
A31
A17
A47
A16
A33
0.5L
0.5L
0.5L
0.5L

0.5B
0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

0.5G
0.5G
0.5G
0.5W

0.5Br

0.5Or

SENSOR
FUEL TEMP
0.5BL
1.25Y
BOOB 1.25B

CRANK
0.5BW
0.5BW

0.5RW
1.25Or

38
0.5BrW
1.25LW
K63 0.5L

CAM SPEED
K77 0.5B
K24 0.5R

A12 0.5G

K80 0.5Br
K81 0.5RW

36

37
1
2

1.25L

1.25P
1.25Y
A04A 1.25Y

A05A 1.25Y
1.25R

1.25G
CK

1.25W
CM

1.25Br
1.25Or
1.25YG
1.25LW
2
2
2

5
5
5

4
1
4
1
4
1

9
8
7
6
9
8
7
6
8
7
6

3
3
3

12
10
12
10

11
11

2
1

2
1

2
1

39
41
40

CN-303
CN-302
CN-301
CR-1

5
4
1

9
8
7
6
3

12
10
11
42
0.5L

0.5B
0.5R

0.5G

0.5L
0.5L
0.5L
0.5L
BATT RY

0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

CN-304
0.5G
0.5G
0.5G
0.5W

0.5Br

43
0.5Or
0.5BL
1.25Y
1.25B

0.5BW
0.5BW

0.5RW
1.25Or

0.5BrW
1.25LW

5R
64
65

43
G12
64 5R
65 5W

0.5Br K80
0.5RW K81
K77
A12
K63
K24

10W
14E

1
1.25L

1.25P
1.25Y
1.25Y

1.25P
1.25R

1.25G
1.25W

1.25Br
K15A

1.25Or

1
1.25YG
1.25LW

2
2
30
Br

86
GrW

3
B

1
BW
5R
K15

5W

4 2
WATER NEW
66

TEMP TEMP
86
30

85
87

5
G13

M
B
A

44

70A
67

2
60R

CR-23
M

6
B+
36 Gr

EGR
RS-1

38 LW
30 8W

67 5W
0.85

3W 120

1
TEMP
5R

V
5R
5R

87
30
B
A

10W
10W

CN-45

1
5W
START RY
RESISTOR

85
86

74
45
85

1
1
2

39

2
M

2
2
1
2
1

2
"B" TERM.

86
30

85

RP

1
87

3
6
5
4
3
2
1
CN-60

2
1
2
1
1
2
3
4
5
6
L

RAIL
P
S
CN-95

BATTERY

3 70A
TO:STARTER

B+

4
CR-24
60B

ALT

2
2

1
1
CN-300B

2
1
2
1
Pa

CN-300C

2
1
IM TEMP
SENSOR SENSOR
87
30
CN-74

3~

INTAKE THROTTOLE EGR VALVE

1
2
CD-18

CN-300A
2

1
G
95A

U
30A

Pre-heater
DO-1

1
85
86
RS-2

2
M

2
FUSIBLE LINK
ENG OIL PRESS

MOTOR

AIR-HEATER RY

INJECTOR 4

INJECTOR 2

INJECTOR 1
CN-80

INJECTOR 3
TEMP
TEMP

SENSOR SENSOR
RESISTOR

STARTER

EGR PRESS SENSOR

SUPPLY PUMP

DPF PRESS
PRESS EXT. TEMP
(GRAY)
(BLACK)
DPF MID

YANMAR SIDE
DPF INLET

20M9-95024-00
 SAFTY
CAN_L
CAN_H
GROUND
EPPR CLAMP (A2)

EPPR RELEASE(A1)

DESTINATION
DESTINATION
DESTINATION
EPPR ROTATE RIGHT(A)

DPF-REGEN
EPPR ROTATE LEFT(B)

PREHEAT CONTACT
START RY COIL(-)

PREHEAT COIL (-)

START RY CONTACT

NC
START RY COIL(+)

NC
NC
NC

CAMERA_SHIELD
PREHEAT COIL (+)
BATT.RY(IG)

OVERLOAD PS(MCU)
REGEN-SW-COM

OVERLOAD SENSOR
WORK LAMP

PATTERN CHANGE
PATTERN CHANGE

CAMERA IG
EGR VALVE RY_C
NC

Q/COUPLER SW (MCU)
NC
EGR VALVE ECU

DPF- NON REGEN

NC
8
7
6
5
4
3
2
1

CAN_SHIELD
HOUR METER

NC
WASHER P/P

CLUSTER GND
CAN_Hi
TRAVEL ALARM
SOL FUSE
ECM_POWER 12V
ECM_POWER 12V

CAN_Lo
CAMERA_2
ECM_IG

CAMERA_3
AC COMP
BATT. RY

HORN RY(JOYSTICK)

CONDENSOR FAN
CONDENSOR FAN
AC DPS
AC DPS
FUEL FILLER PUMP

BREAK SIG(JOYSTICK)
MCU IG
NC

NC
NC

SAFETY SOL
CN-264

HEAD LAMP
NC

ALT
HORN

BREAKER RETURN SOL

SW MASTER
MCU B+

FUEL FEED P/P

BREAKER SOL
SAFETY LEVER RY CONTACT

CIGARLIGHTER/WASHER P/P

START SIG.
NC

NC
NC
NC
NC
NC

GND
GND

NC
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10

NO.
NO.
9
8
7
6
5
4
3
2
1

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
NO.

2
1

2
1
EARTH 1
EARTH 2

SHIELD
CN-312

CAMERA_2
CAMERA_3
MAIN_GND
POWER_IG
1 0.75 FLRY-B B PORT ANGLE DOZER L OR

2
2
1

9
8
7
5
9
8
7
5

4
1
4
1

6
6

3
3

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10
2

9
8
7
5
B PORT- RORATING(LEFT)

4
1

6
3
0.75 FLRY-B

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10

2
1
2

2
1
2

CN-5
CN-8
CN-4
0.75 FLRY-B A PORT - ANGLE DOZER R OR

CN-13
CN-14

AUX-CAMERA
6
5
4
3
2
1
3
1
A PORT- RORATING(RIGHT)

1.25
0.75 FLRY-B

1.25
1.25
4

0.8
0.8
0.8

CN-259
2

0.8
0.8

0.8
0.8
0.8
0.8
1.25

1.25

Pa
0.8B
R
5

0.8
0.8
2.0
0.8

0.8
0.8
0.8
0.8

0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8

W
1

1.25
1.25

1.25

1.25
1.25
6
2

1.2R

1
2
1.2W

0.8Gr

2
1
1.2ROr

CD-1
- MACHINE SERIAL NO. : #0754-

R 5.0SQ

CD-10
CD-2
W 8.0SQ
CN-81

8.0SQ
8.0SQ
TRAVEL BZ

36
73
3E
0.75BrW 131

B
80

Or
YW

YR
FUEL SENDOR

HYD OIL TEMP

AIR CLEANER SW
3.0
2
1

2
1
CN-20
A2 CLAMP

B
1
E1

1 A1 RELEASE GOr
2
2
CN-62A CN-25
HORN

B
1
1 GOr
2
2
CN-62B
CN-145

PATTERN CHANGE
M R CN-12
2 CL-5
B B 1 B

FUEL
1 1 1
Br 2 RL
2 R 2 2
1 B CL-6

sig
sig
sig
B

DO-2
1
RL
2
WORK LAMP

SUPPLY
SUPPLY
SUPPLY
3 2B

B
A
B
A
B
A

RETURN C
RETURN C
RETURN C
E1

BOOM PS

PRESS(A)
WORKING
CD-31

CD-32
OVERLOAD

CD-7
CN-29
YR
2 Pa
LW
1

CN-28
LW
CN-51
1.2B 3E
TRAVEL SPEED SOL(DO) 1
Q/COUPLER SOL (DO) 2 CN-140
B
ANTI RESTART RY(D.O) 3 1
LW
R/DRYER AC COMP SOL

Q/COUPLER SW (DI) 4 2
QUICK

E/G OIL PS(DI) 5

TRAVEL HI SLECT SIG(DI) 6
CN-22
TRAVEL Lo SLECT SIG(DI) 7 OrW
2 M
TRAVEL NEUTRAL SLECT SIG(DI) 8 Gr
P/P

1
TRAVEL FWD SLECT SIG(DI) 9
COUPLER WASHER

BOOM SWING PS(DI) 10

AIR CLEANER SW(DI) 11
WATER SEPERATOR SIG(DI) 12 CS-16
G
AUTO CRUISE SELECT SIG(DI) 13
0.8GrW 76 R
2 1

TRAVEL DI (ECHO) 14
BRAKE PS Lo(AI) 15
Gr
WOKIG PS SENSOR(AI) 16
FUEL PUMP SW

ACCEL DIAL SIG(AI) 17 CN-61

FUEL SENDER(AI) 18 B M
12V POWER OUTPUT 19 R
0.8V 70
PUMP

ALT. LEVEL(AI) 20
E1

EPPR(+)(AI) 21
CN-66
BATTERY POWER 22 L
0.8L 2 2
POWER IG 23 B
SOL

1
CRUISE SOL(DO) 24
FUEL BREAKER

RAMLOCK SOL. 25
CN-66P
PRE-HEAT RY(DO) 26 0.75B 2
TRAVEL BUZZER 27 0.75G
1
Q/C DISENGAGEMENT (DI) 28
RAMLOCK SW_OFF(DI) 29 DO-20
0.75G
RAMLOCK SW_ON(DI) 2
BREAKER

30
0.75B
RAMLOCK SW_AUTO(DI) 31 1
RETURN SOL

MODE_PARKING(DI) 32
MODE_WORKING(DI) 33 CN-83
GR
MODE_TRAVEL(DI) 34 2
FAN

3B M
TRAVEL BUZZER SEL. SIG(DI) 35 1
E1

BRAKE LAMP"ON" SIG(DI) 36

HIGH BEAM SIG(DI)
CN-70
37 RW

MCU
2
BOOM UP PS 38 Gr
SOL.

1
WORKING BRAKE SENSOR(AI) 39
AC CON TRAVEL

POTENTIOMETER SIG(AI) 40
HYD. TEMP SENSOR(AI) 41
CN-68
Y
5V POWER OUTPUT
2
42 B
1
SOL.

NC 43
NC 44
SAFETY

EPPR(-)(AO) 45
MAIN GND
CL-3
46 B
1
MAIN GND 47 12 RW
SAFETY SOL(DO)
2
48
FUEL WARMER(DO) 49
B
BRAKE LAMP CUT RY(DO) 50 1
12A RW
HOUR METER 2
HEAD LAMP

51
PROGRAM DUMP(DI) 52 CL-4
GND COM 53
RS232_RX(2) 54
RS232_TX(2) 55
RS232_RX(1) 56
CS-4
1 3 2
RS232_TX(1) 57
J1939 CAN_Lo(2)C
2
58
J1939 CAN_Hi(2) 3 1
59
J1939 CAN_Lo(1)E 60 CS-4A
SAFETY SW

1 3 2
J1939 CAN_Hi(1) 61
NC
6 2
62
TRAVEL FWD SENSOR(AI)
5 3 1
63
4
OVERLOAD PS 64 36 0.8Gr 3 42 0.8Gr
COOLANT TEMP(AI) 65 Gr 1
99 0.8W 2 43 0.8W
GND_SENSOR 66
37 0.8B 1 44 0.8B CN-7
NC 67 L 2
TACHO SIG(+) 68
CN-16 1
1 CS-5
SPARE(MOTOR-) 2 2
69 Lg R
HORN

2
SPARE(MOTOR+) 3 1
70 CS-47
LH JOYSTICK

4 2
B
(GUN)
BOOM
SWING

CN-126 5 1

2.5k

2.5k
B 51 Gr
1 6
G 72 B

12V+

CAN_L

NC
2 7

GND
CAN_H

NC
2

6
5
4
1

3
R 73 Gr
8

CN-16B
3

6
5
4
3
2
1

RS232
Gr

CONN.
BW 57 L 1

CN-148
4 9
R

SERVICE TOOL
3 2B 10

0.8B
0.8W
R L 2

0.8Gr

0.5
0.5
0.5
0.5
11
B 1 CS-29
12 2
Y Lg 2 B

69
68
67
13 1
2B ECM CASE SHIED B GW 3 CS-26

K65
K75
K53
K90
3 GW
Q/C DISENGAGE

14 2
RH JOYSTICK

G G 4 4 G R
15 1
(GUN) BREAKER

CN-93A RW RW 5
2.0R K01 16
POWER 12V 1 Gr Gr 6
2.0B K02 17
MAIN_GND 2 GOr GOr 7
2.0R K03 18
POWER 12V 3 W W 8
2.0B K04 19 CL-2
MAIN_GND 4 B B 9 5 RW
2.0R K05 20 1
POWER 12V 5 6 Gr
2.0B K06 2
MAIN_GND 6 1B B
3

4-63-2
NC 9
NC 10
CIGAR LIGHTER

SPEED PERMISSION(OPT) 13 CN-142

STARTER PERMISSION1(OPT) 14 7 GOr
0.5Br K15 A +
ENG. OIL PS 15 8 W
B S
SPEED SW2(OPT) 16 9 B
C -
HIGH IDLE SW 17
ACCEL DIAL

0.5LW K18 1
DPF REGEN SW 18
SPEED SW1(OPT) 19 2
0.5G K20
INTAKE THROTTLE 20
0.5BW K21
NEW TEMP SENSOR 21
ACCELERATOR3(OPT) 22
0.5R
46

K23
46A

46

INTAKE THROTTLE 23
0.5R K24
DPF PRESSURE SENSOR 24
L
B
L
L
B

DPF REGEN LAMP 25

ISOCHRONOUS LAMP 26
2
1
1
2
1
2

NO DPF REGEN LAMP 27

0.5P K28
CN-81
CD-11
CD-12

START RY COIL(-) 28
Pa
Pa

LAMP,SW COM 29
0.5Y K31
TRAVEL BZ

NON DPF REGEN SW 31

0.5L K33
TRAVEL ALARM PS

EGR. TEMP SENSOR 33

0.5G K35
KEY. START SIG. 35
ANALOG RESERVE 36
DROOP SW(OPT) 37
STARTER PERMISSION2 SW(OPT) 38
0.5W K39
EGR PRESSURE SENSOR 39
WATER SEPARATOR SW,LAMP 40
AIR-CLEANER SW,LAMP 41
HIGH IDLE LIMIT SW(OPT) 42
0.5R K43
ACCELERATOR1(5v) 43
ACCELERATOR3(OPT) 44
0.5R K45
EGR Ps SENSOR(5V) 45
ACCELERATOR2(5V) 46
LOAD FACTOR OUTPUT(OPT) 47
FAIL LAMP 3 (OPT) 48
COOLANT TEMP WARN.(OPT) 49
PREHEAT LAMP (OPT) 50
SW,LAMP COM (DPF SW) 51
0.5Br K52
INTAKE THROTTLE 52
0.5L K53
YDT(CAN2_L) 53
0.5P K54
EGR VALVE 54
ACCELERATOR3 55
0.5Y K56
DPF OUTLET TEMP 56
ACCELERATOR3 58
NC 59
0.5P K61

ECU
ACCELERATOR1 61
0.5B K62
ACCEL_GND 62
0.5L K63
DPF PRESSURE SENSOR 63
0.5B K65
YDT(GND) 65
0.5RW K66
ALT LEVEL 66
ENG STOP SW2 67
0.5L K68
EGR VALVE RY(+) 68
0.5LW K70
GLOW RY COIL(+) 70
PRELIMINARY LAMP 71
AEX3SQ

FAILURE LAMP2 72
1.25G K73
START RY COIL(+) 73
0.5B K74
EGR PRESSURE SENSOR 74
0.5Y K75
YDT(CAN2_H) 75
0.5L K76
EGR VALVE 76
0.5B K77
DPF SENSOR_GND 77
0.5P K79
NEW TEMP SENSOR 79
0.5Br K80
DPF INTERMEDIATE TEMP 80
0.5RW K81
CN-100

DPF INLET TEMP 81

ACCELERATOR2 83
ACCELERATOR2 84
0.5Y K85
EGR PRESSURE SENSOR 85
0.5Or K86
REGERATION INTERLOCK SW 86
0.5B K87
SWITCH COM 87
1.25Or K88
IG POWER 88
AEX3SQ

ACCELERATOR3 89
0.5Or K90
YDT(12V) 90
FAILURE LAMP3 92
BUZER 93
COOLANT TEMP LAMP 94

CN-93B
1.25Or A01
INJECTOR 2 1
1.25Br A02
INJECTOR 3 2
1.25Y A04
SUPPLY PUMP 4
1.25P A05
SUPPLY PUMP 5
0.5R A07
PRESSURE SENSOR_RAIL 7
0.5RW A08
CAM SPEED SENSOR 8
0.5L A11
FUEL TEMP SENSOR 11
0.5G A12
DPF PRESSURE SENSOR 12
DISPLAY OF SPEEDCHARGE LAMP 15
1.25R A16
INJECTOR 4 16
1.25L A17
INJECTOR 1 17
1.25Y A19
INTAKE THROTTLE 19
1.25LW A20
INTAKE THROTTLE 20
0.5BW A25
PRESSURE SENSOR_RAIL 25
0.5G A26
PRESSURE SENSOR_RAIL 26
0.5G A28
ECU

COOLANT WATER TEMP 28

0.5L A29
COOLANT WATER TEMP 29
BUZZER+ 30
1.25YG A31
INJECTOR 2 31
1.25G A32
INJECTOR 3 32
1.25LW A33
INJECTOR 4 33
APPROVAL DPF REGEN LAMP 34
0.5L A37
CAM SPEED SENSOR 37
0.5B A38
CRANK REV SENSOR SHIELD 38
0.5P A39
CRANK REV SENSOR 39
1.25W A47
INJECTOR 1 47
1.25R A50
COM IG POWER 50
0.5BrW A51
FUEL TEMP SENSOR 51
0.5BL A52
CAM SPEED SENSOR 52
0.5Or A54
CRANK REV SENSOR 54
1.25R A60
COM IG POWER 60
0.5 A59
IM TEMP SENSOR 59
A51
A11
K56
A38
A54
A39
A52
A37
A08
A25
A26
A07
K33
A59
A20
A19
K52
K20
K23
K76
K54
B42
A29
A28
K21
K79
K74
K39
K85
K45
B

0.5
0.5
0.5

REV
BrW

SENSOR

A05
A04
A02
A32
A01
A31
A17
A47
A16
A33
0.5L
0.5L
0.5L
0.5L

0.5B
0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

0.5G
0.5G
0.5G
0.5W

0.5Br

0.5Or

SENSOR
FUEL TEMP
0.5BL
1.25Y
BOOB 1.25B

CRANK
38
0.5BW
0.5BW

0.5RW
1.25Or

0.5BrW
1.25LW
K63 0.5L

CAM SPEED
K77 0.5B
K24 0.5R

A12 0.5G

K80 0.5Br
K81 0.5RW

36

37
1
2

1.25L

1.25P
1.25Y
A04A 1.25Y

A05A 1.25Y
1.25R

1.25G
CK

1.25W
CM

1.25Br
1.25Or
1.25YG
1.25LW
2
2
2

5
5
5

4
1
4
1
4
1

9
8
7
6
9
8
7
6
8
7
6

3
3
3

12
10
12
10

11
11

2
1

2
1

2
1

39
41
40

CN-303
CN-302
CN-301
CR-1

5
4
1

9
8
7
6
3

12
10
11
42
0.5L

0.5B
0.5R

0.5G

0.5L
0.5L
0.5L
0.5L
BATT RY

0.5P
0.5P
0.5P
0.5B
0.5Y

0.5R
0.5R
0.5R

0.5G
0.5G
0.5G
0.5W

0.5Br

43
0.5Or
0.5BL
1.25Y
1.25B

CN-304
0.5BW
0.5BW

0.5RW
1.25Or

0.5BrW
1.25LW

5R
64
65

43
G12
64 5R
65 5W

0.5Br K80
0.5RW K81
K77
A12
K63
K24

10W
14E

1
1.25L

1.25P
1.25Y
1.25Y

1.25P
1.25R

1.25G
1.25W

1.25Br
K15A

1.25Or

1
1.25YG
1.25LW

2
2
30
Br

86
GrW

3
B

1
BW
5R
K15

5W

4 2
WATER NEW
66

TEMP TEMP
86
30

85
87

5
G13

M
B
A

44

70A
67

2
60R

CR-23
M

6
B+
36 Gr

EGR
RS-1

38 LW
30 8W

67 5W
0.85

1
TEMP
5R

V
5R
5R

87
30
B
A

10W
10W

CN-45

1
5W
START RY
RESISTOR

85
86

74
45
85

1
1
2

39

2
M

2
2
1
2
1

2
"B" TERM.

86
30

85

RP

1
87

3
6
5
4
3
2
1
CN-60

2
1
2
1
1
2
3
4
5
6
L

RAIL
P
S
CN-95

BATTERY

3 70A
TO:STARTER

B+

4
CR-24
60B

ALT

2
2

1
1
CN-300B

2
1
2
1
Pa

CN-300C

2
1
IM TEMP
SENSOR SENSOR
87
30
CN-74

3~

INTAKE THROTTOLE EGR VALVE

1
2
CD-18

CN-300A
2

1
G
95A

U
30A

DO-1

1
85
86
RS-2

2
M

2
FUSIBLE LINK
ENG OIL PRESS

MOTOR

AIR-HEATER RY

INJECTOR 4

INJECTOR 2

INJECTOR 1
CN-80

INJECTOR 3
TEMP
TEMP

SENSOR SENSOR
RESISTOR

STARTER

EGR PRESS SENSOR

SUPPLY PUMP

DPF PRESS
PRESS EXT. TEMP
(GRAY)
(BLACK)
DPF MID

YANMAR SIDE
DPF INLET

20M9-95025-00
 CN-27A
98 0.5Gr
·ELECTRICAL

1 USB 5V
1 5R 99 0.5R
2 USB D-

3
WB 15 2 H BR ACC ST C 100 0.5B
Or

5
6
16 BW 3

2
3
INLET MOTOR(REC) 1 USB D+

4
BW 16 3 H0 I G2 0.75B
INLET MOTOR(FRE) 2 15W 4 USB GND

M
LR 17 4 CL-2 CL-2
TEMP MOTOR ACT(+) 3 5 NC

86 30
86 30
BG 18 5 1 1
TEMP MOTOR ACT(-) 4 0, I 6 AUX L

7
85 87 87a
85 87 87a
GL 19 6 2 2

1
2
B

INLET M/ACT
15 WB 7

5
6
8

3
4
9
TEMP M/ACT(PBR) 5 AUX R

1
2
15
17

14
16
19

11
12
13
18
20

10
START SW
7 3 3

87a

86
85
87a

30
86
85

87
30
87
CR-2
REMOTE ASS'Y

Y 20

12V SOCKET

CR-33
8

3
2
6

1
4
5
MOTOR ACT(REF) 6 AUX GND

CN-139

AC FAN RY
B
GW 21 17 LR

R
HORN RY

CN-36
MODE M/ACT(DEF) 7

1
1

CS-2
BG 22 CN-246

20A

10A
20 Y

20A
10A

30A
10A
20A
B
G
G
MODE M/ACT(FOOT) 8 98 0.5Gr

HARNESS-EXT
2

GR
1

2A
USB(+5V)

M
V
GOr
WR 23

CIGAR LIGHTER

OrW

3 LR
3 LR
Or
MODE M/ACT(M+) 9 3 CN-264 99 0.5R

BrW
2 USB(D-)

4
MCU

20A MCU
LB 24 18 BG

20A ECU
MODE M/ACT(M-) 10 B 100 0.5B
1

20A WIPER
4 GROUND 5 NC

40A AC FAN
3 USB(D+)

2
YB 25 19 GL 0.85

CLUSTER
MODE M/ACT(PBR) 11 5 12 12V POWER G2 0.5B

20A SOLENOID
20A ALT,START

5
4 USB(GND)

START KEY
20A AC HEATER

HEAD LAMP
0.75YR 130

FEED PUMP
LG 26

10A SAFETY SOL

20A WORK LAMP

BLOWER RELAY(LO) 12 0.85 85 0.5R
6 11 12V POWER

20A BEACON LAMP

5

TEMP M/ACT
YBr 27 9A GB L 0.85 RX

7
BLOWER RELAY(M1) 13 86 0.5B
ELECTRICAL CIRCUIT (2/3)

7 EPPR CLAMP (A1) 2 5 EPPR CLAMP 6 TX

BG 28 V 0.85
BLOWER RELAY(M2) 14 26F 0.5G

20A CLUSTER,CASSETTE
EPPR ROTATE LEFT (B) 1 10 EPPR ROTATE L

10A CASSETTE,SW PANEL

YB 29 1 7 ILLUMINATION

FUSE BOX
FUEL FILLER P/P,HORN
0.85

PRE-HEAT,CABIN LAMP
Y

30A ROOM LAM&AC HEATER

BLOWER RELAY(HI) 15 EPPR RELEASE (A1) 4 6 EPPR RELEASE G2 0.5B

CN-306(Black)
8

3
LW 30 2 0.85 GND
G

V
Y
R
R
COMPRESSOR(DPS) 16 93 0.5Y

G
G
21 GW

R
EPPR ROTATE RIGHT (A) 3 9 EPPR ROTATE R

Lg
Or
RL
9 TX/S

LW
BW
LY 31 3

RW
RW

GW

YOr

3LR
ROr

OrW

2BW
CONDENSER FAN 17 58G 0.5GW
USB&SOCKET ASS'Y

10

M
4 POWER IG
18 CN-307 87 0.5LW
5 11 GND(JACK)
- MACHINE SERIAL NO. : -#0719

7
BR 1 6 12 NC
GND 1 22 BG 2

MODE(D/FOOT)
BR 2 7 CN-245E
GND 2 3
RW 3 23 WR 1 EXT VOLUME-

1
BATTERY(+) 3 1

Service Tool
RW 4 20A Y 2
BATTERY(+) 4 2 EXT VOLUME+
W

M
G 5 0.85
ILLUMINATION 5 3 SAFETY 8 12 SAFTY 3 EXT SPK ON
0.85

AC&HEATER CONTROLLER
RY 6 24 LB 7 Or 4 CAN_L
POWER IG 6 4 CAN_L 4 EXT SPK MIC-
0.85

2
25 YB 6 V 3 CAN_H
NC 7 5 CAN_H 5 EXT SPK MIC+

5
BrR 8 0.85 58F 0.5GW
DUCT SENSOR(+) 8 6 11 SIG_INPUT RH 6 POWER IG

MODE(VENT)
GB 9 9B GB 0.85 G2 0.5B

7
DUCT SENSOR(GND) 9 7 10 SIG_INPUT LH 7 GND
GB 10 0.85 94 0.5GW
REVERSE FAN SIG 10 9 SENSOR_GND 8 RS232_RX
26 LG 0.85 96 0.5G
NC 11 1 Lo 1 8 5V OUTPUT 9 RS232_TX
CN-305(Gray)

35 YW 1.25R 97 0.5VW
NC 12 2 MH 3 2 12V POWER 10 AUDIO_TX
27 YBr 1.25B 95 0.5L
NC 13 3 ML 2 1 GND 11 AUDIO_RX
36A L
NC 14 4 Hi 4 12 PTT(SW SIG)

29 YB CN-241 CN-245A
1 2 1 58E 0.5GW
1.25LgB 9 1 1 POWER IG
1 33 R Gr 88 0.5R
1.25G 8 2 2 2
6B RY 2 SIG+
2
BREAKER

3 92 0.5Br

DUCT
1 3 SIG-
36 L
REMOTE ASS'Y

SENSOR
4 4 3 4 NC
2 1 89 0.5B
S 5 H/F IND+
28 BG 3
RCV-RH

2 1 G2 0.5B

5
6
1 0.85 W 3 6 H/F IND-

31
30
33
10
32
33A R SIG

1,2
2 0.85 B PROPORT- 83 0.5R
2 7 MIC+
6A RY RETURN IONAL 84 0.5B
3 0.85 R 1 8 MIC-
35 YW 5V

G
26E 0.5G

LY
2B

2R
4 4

RY
3

LW
9

RW
CN-240 ILLUMINATION

1.25B
RESISTOR RELAY(HI) RELAY(M2)
80 0.5Y
32 2B 1 10 REMOTE SIG+
1 M Gr 2 81 0.5Or
BOOM

8
7
6
5
4
3
2
1
36 L 11 REMOTE SIG-
SWING

8
7
6
2
2

5
4
3
1

NO.
2 G2 0.5B
1 12 GND

CN-11
HORN

BLOWER
21M9-62310 HARNESS EXT. EPPR
1 CN-144E

MCU
94 0.5GW

2.0B
1.0B
S

1.0G

AIR CON
3 1 RS232_RX

0.75Y
0.75Or
0.85 W
3

0.75GW
0.75GW

FUSE(IG)
SIG 2 NC
0.85 B
RCV-LH (BR11)

PROPORT-
2 RETURN IONAL 3 NC

FUSE(Battery)
0.85 R 95 0.5L

ILLUMINATION
1

GND(BLOWER)
53
23
52
5V 4

G1
G1
REMOTE AUDIO RX

50A

26C
H/FREE

DESTINATION
96 0.5G

CONDENSOR FAN
5 RS232_TX

GND(CONTROLLER)

DPS(COMPRESSOR)
6 NC
G2 0.75B
7 RS232_GND
97 0.5VW
8 REMOTE AUDIO TX

CN-144A
83 0.5R
1 MIC+
85 0.5R
2 RX(JACK)
92 0.5Br
3 GND(SEND)
78 0.75R
4 TEL MUTE
H/FREE

93 0.5Y
5 TX/S
77 0.75BrW
6 CAR AUDIO(-)
82 0.75V
7 CAR AUDIO(+)
CR-7 8 NC
58D 0.75GW
9 POWER IG
86 30 87a 84 0.5B
0.75VW 24 10 MIC-
85 86 0.5B
0.75Y 16 11 TX(JACK)
87 87 0.5LW
0.75GW 52A 12 GND(JACK)
86
85 87 87a 0.75GW 52B 13 RX(SEND)

AC COMP
30 88 0.5R 14 TX(SEND)
89 0.5B
15 IND(+)
CN-170 16 NC
0.75B G2 90 0.75Y
1 17 SPK(-)
0.75V 18A 91 0.75LW
2 18 SPK(+)
G2 0.75B
19 GND(MAIN)
20 NC

SEAT HEATER
CN-27
58C 0.75GW
1 ACC
G2 0.75B
2 ILL-
3 NC
76 0.75YW
CS-50 4 SPK FRT RH-
77 0.75BrW
5 SPK FRT LH-
12 78 0.75R
12 11 24R 0.8B 6 TEL MUTE
11
61 0.8Or 7 ANT 12V
10 54B 0.75G
10 8 BACK UP+
9 8 26D 0.75G
4 9 ILL+

ps
8
9 0.8V 10 10 NC
7 7 79 0.75L
3 1.2Br 27 11 SPK FRT RH+
6 80 0.5Y
12 REMOCON+
5 81 0.5Or
13 REMOCON GND
new CASSETTE RADIO

4 82 0.75V
0.8Vr 11 14 SPK FRT LH+
3

mcu
0.8Or 61 15 NC
G2 0.75B

OVERLOAD SW
2
12 1 16 GND
1

CN-23
91 0.75LW
CS-100 1
LH

90 0.75Y
1 2
2

0
3
DPF REGEN CN-24
4 79 0.75L
1

0,1
5
RH

76 0.75YW
2
4 R 6
SPEAKER SPEAKER

6 7

DPF
DPF COM
8 CN-289
10 I 9 58B 0.75GW
1 POWER 12V(IG)

21M9-22300
DPF INHIBIR
8 10 SPK +
2
11 NC
12 11 3
12 G2 0.75B
4 GND
5 SPK -
SIREN AMP

CR-3 6 NC
86 30 87a
B
85
Br
87
R
86
85 87 87a YOr
30

WORK LAMP
CN-157
CR-85 58A 0.75GW

86 30 87a
B ANTENA POW
85
G
87
BrW
86
85 87 87a BW
30

CR-13
86 30 87a
B
85
G
87
BrW
86
85 87 87a BrW
30

BEACON LAMP HEAD LAMP

CN-116
ROr
HEAD LIGHT OUT 1
V
WORK LIGHT OUT 2
NC 3
NC 4
NC 5 CS-3
Br
6 1

4-64
BEACON LAMP
Or
CABIN LIGHT OUT 7 2
36 V
3
I 0

TRAVEL ALARM 8
G 4
BREAKER 9
RL 35 Or

SWITCH PANEL
POWER 12V(IG) 10 5 4
B B
GND 11 6 8
37 Br
7 10
WIPER SW

NC 12
35A Or
8 3
7 6
9 9
CR-9 10
87a 7B ROr
86 30 11
Or 35 Or 11 12
85 12
G
87
BrW CR-6
86 37 Br
85 87 87a BrW
30 6
7 ROr

CABIN LAMP
4
CS-67
B
12 35 Or
12 11 LW 3
11 36 V
1
INT.WIPER RY

10
10
8 9 CR-4
4 RW 40 G
8 30
9 RW 7C ROr 87a 87 85
7 7 86
3 7D ROr
6 87
38 Or
5 85

I
LW 39 Gr
WIPER RY

4 87a 30 86

QUICK COUPLER
LW
3
2
12 1
1 4 Lo M
CN-21
CN-113 40 G
0.8Or 00 4
2 7E ROr 3 B
0.8B 00 3
1 B 1 Pf
2 2 E
39 Gr
WIPER MOTOR

BUZZER
1
CR-5
86 30 87a 36A V
LY 1
85 41A G
BW 2
DO-1

87
RW
86
85 87 87a GW
30 1
1 12
2

ANTI-RESTART
3
CR-36 B
4
86 30 87a 5
BW 41 G
85
WASHER SW

6
V 4
87 7 6
W 7
86 8
85 87 87a R
30 9
10
PRE-HEAT RY

CR-62 11
11 12
87a 12
86 30
Br
85 CS-30
L
87
BREAK

G
86
85 87 87a G
30

CR-80
86 30 87a
85 0.85
87 1.25
0.85
86
85 87 87a 1.25
30
EGR VALVE

CS-76
1
2
LgR
3
GW
4
5
6
3 B
7 7
9 RW
8
4
8 9
10
10
GW
11
12 11
PATTERN CHANGE

B
12

CR-40
0.75Y 133
86 30 87a
0.75LW 132
85
87
0.75BrW 131
86
85 87 87a 0.75YR 130
30
SAFETY LEVER

CN-56
0.8 3E
BATTERY 12V 1
0.8 73
POWER_IG 2
0.8
DIFF_H 3
0.8 80
CAMERA_2 4
0.8
CAMERA_1 5
1.2 36
MAIN_GND 6
CLUSTER

0.8YB
CAM SHIELD 7
CLUSTER

0.8G 72
DIFF_L 8
0.8G
CAN_Lo 9
0.8G
CAN_Hi 10
3.0
B
Y
Br
Or

5E
G2

34A

8.0SQ R

5.0 SQ
8.0SQ W

15.0 SQ

36
73
3E
6
5
4
3
2
1

8
7

74
CN-6

B
G
BW
GW

00
00
00
5R
5R

0.8
1

0.8
0.8
0.8
0.8
2
1
2
B
R

0.8B
Or

ROr

CN-13
78

03
58

68

CN-14
133 0.75Y

0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8

1.25
a78

1.25
1.25
1.25
1.25
1.25

2
1

0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
131 0.75BrW
1

2
3

9
8
7
6
5
4
3
1

1
2
3
2

1.25
1.25

12
11
10
1.25
CR-45
G1

CS-74A
2
1

RMS
2
1

CN-48

(-)
(+)
SIG
a78 78 58
03 68

CN-125A
3

6
4
1

9
8
7
5
2

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
CN-4

3
3

6
6

4
1
4
1

9
8
7
5
9
8
7
5

2
2

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10

CN-5

H
CN-8
DIFF_L

ECU IG POWER

GND
GND

KEY "IG"

MAIN GND
F/W DOWN
CAN (LOW)
CAN (HIGH)

RX232(2)-TX
RX232(1)-TX

RX232(1)-RX
RX232(2)-RX
9
8
7
6
5
4
3
2
1

CAN (SHIELD)
GND (SERIAL)
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
NO.

MASTER SW
BATT.RY(IG)

9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
SW MASTER

20
19
18
17
16
15
14
13
12
11
10
15
14
13
12
11
10

NO.
DIFF_H
MAIN_GND

BATTERY POWER
power

NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC

ALT
3
3

NC
G1

NC
NC

NC
NC
NC
G1
21
23

HORN
22
24

MCU IG
AC DPS
AC DPS
3

MCU B+
G2
1

ECM_IG

CAN_Hi
G3

CAN_Lo
BATT. RY

AC COMP

START SIG
SOL FUSE
B

HEAD LAMP
SAFETY SW
R

HOUR METER
CAMERA_2
Or

B
B

CAMERA_1
WASHER P/P
ROr

CAMERA IG
BREAKER SOL

DPF-REGEN
ROr

CAN_SHIELD
0.8L

WORK LAMP
0.8B

FUEL FEED P/P

0.8Y
0.8Gr

HOUR METER

CLUSTER GND
DESTINATION

CONDENSOR FAN
CONDENSOR FAN
ECM_POWER 12V
ECM_POWER 12V

EGR VALVE ECU

REGEN-SW-COM

DESTINATION
DPF-NON REGEN
DESTINATION

EGR VALVE RY_C

CAMERA_SHIELD
FUEL FILLER PUMP

START RY COIL(-)

PREHEAT COIL (-)

START RY COIL(+)

PREHEAT COIL (+)

1
2

PATTERN CHANGE
PATTERN CHANGE
HORN RY(JOYSTICK)
2
1
2
1

BREAK SIG(JOYSTICK)

START RY CONTACT
PREHEAT CONTACT

OVERLOAD SENSOR
OVERLOAD PS(MCU)
CL-1
4+

QUICK COUPLER SOL

CL-7

CL-9
2 g
1 L

3 H

TRAVEL ARALM (MCU)

G4

CL-9
CN-249

HARNESS CABIN
M

CIGARLIGHTER/WASHER P/P
CAMERA

SAFETY LEVER RY CONTACT

CABIN LIGHT
ROOM LAMP
BEACON LAMP

20M9-95013-00
 CN-27A
98 0.5Gr
1 USB 5V
1 5R 99 0.5R
2 USB D-

3
WB 15 2 H BR ACC ST C 100 0.5B