MINI EXCAVATOR GB

MODEL
U27-4

OPERATING INSTRUCTIONS
RH418-8135-3 - Original - 07/2015
Dear valued customer,

please fill in the form below. Your information will help us to help you.

Type:

Year of construction:

Serial #:

Shipment date:

Please contact your KUBOTA dealer for any additional information or troubleshooting procedures not mentioned
in these operating instructions.

We also point out that the contents of these operating instructions are not part of an earlier existing agreement,
promise or legal relationship or amend this. All responsibilities arise from the respective sales contract containing
the complete and exclusively valid contractual warranty, refer to the "Duties, liability and warranty" section
(page 14). This documentation does neither extend nor restrict the contractual warranty.

KUBOTA Baumaschinen GmbH reserves the right to change the information contained in this document with re-
spect to future technical development without altering the basic characteristics of the excavators described herein
and without amending this document.

Distribution and reproduction of this documentation and disclosure of its content are not allowed unless expressly
approved by the manufacturer. Violators of the above terms are liable for compensation for damages.

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Contents
CONTENTS....................................................................................................................................... 3
Abbreviations .......................................................................................................................................... 8
General symbols ..................................................................................................................................... 9

GENERAL INFORMATION ............................................................................................................ 11

Foreword ................................................................................................................................................ 11
EC declaration of conformity ............................................................................................................... 11
Date of issue of the operating instructions ........................................................................................ 12
Operating personnel ............................................................................................................................. 12
Location of the operating instructions................................................................................................ 12
Spare parts............................................................................................................................................. 13

SAFETY RULES ............................................................................................................................. 14

Basic safety instructions...................................................................................................................... 14
Duties, liability and warranty................................................................................................................ 14
Safety symbols ...................................................................................................................................... 15
Approved use ........................................................................................................................................ 16
Unapproved use .................................................................................................................................... 16
Special duties of the owner.................................................................................................................. 17
Noise emission and vibration .............................................................................................................. 18
Safety instructions on the excavator .................................................................................................. 19
Safety devices ....................................................................................................................................... 26
Locking the controls ........................................................................................................................... 26
Engine stop knob ............................................................................................................................... 26
Protective structure canopy and cab .................................................................................................. 27
Emergency hammer ........................................................................................................................... 28
Hazards coming from the hydraulic system....................................................................................... 28
Fire protection ....................................................................................................................................... 29

RECOVERY, LOADING AND TRANSPORT ................................................................................. 30

Safety rules for recovery ...................................................................................................................... 30
Safety rules while loading with a crane .............................................................................................. 30
Safety rules for transport ..................................................................................................................... 31
Recovery ................................................................................................................................................ 32
Hoisting the excavator with a crane .................................................................................................... 32
Transport on a flat bed trailer .............................................................................................................. 34

DESCRIPTION OF THE EXCAVATOR .......................................................................................... 36

Dimensions ............................................................................................................................................ 36
Specifications ........................................................................................................................................ 38
Identification of the excavator ............................................................................................................. 40
Serial # of the machine ...................................................................................................................... 40
Engine number ................................................................................................................................... 40
Standard equipment.............................................................................................................................. 41

ASSEMBLY AND FUNCTIONS...................................................................................................... 42

Component overview ............................................................................................................................ 42
Operator's place .................................................................................................................................... 43
Left control console ............................................................................................................................ 43
Drive levers and control pedals .......................................................................................................... 44
Right control console.......................................................................................................................... 45
Display and control unit ...................................................................................................................... 46
Other equipment at the operator's place ............................................................................................ 48
Interior lighting.................................................................................................................................... 48
Fuse box ............................................................................................................................................ 48
Tool compartment .............................................................................................................................. 48

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Cup holder .......................................................................................................................................... 49

12-V socket......................................................................................................................................... 49
Other equipment to be found at the machine ..................................................................................... 49
Main battery........................................................................................................................................ 49
Battery cut-off switch .......................................................................................................................... 50
Return change valve for direct return flow.......................................................................................... 50
Tank filler neck and fill level monitor................................................................................................... 50
Main fuses .......................................................................................................................................... 51
Rear view mirror ................................................................................................................................. 51
Heating and ventilation (cab version) ................................................................................................. 51
Hydraulic oil tank ................................................................................................................................ 53
Coolant radiator and hydraulic oil radiator.......................................................................................... 53
Engine compartment ............................................................................................................................. 54

<VARIABLE>RH418- ......................................................................................................................55

OPERATION ....................................................................................................................................55
Safety rules for operation ..................................................................................................................... 55
Safety for children............................................................................................................................... 56
Guiding the operator........................................................................................................................... 56
Working in the vicinity of overhead power lines.................................................................................. 57
Working in the vicinity of underground power lines ............................................................................ 57
Initial operation ...................................................................................................................................... 57
Getting on the excavator .................................................................................................................... 58
Explanation of the display indications................................................................................................. 58
Setting the clock ................................................................................................................................. 59
Running-in of the excavator................................................................................................................ 60
Special maintenance instructions ....................................................................................................... 60
Pre-operational services ....................................................................................................................... 60
Walk-around inspection ...................................................................................................................... 60
Dust valve - clean ............................................................................................................................... 61
Engine oil level - check....................................................................................................................... 61
Coolant level - check .......................................................................................................................... 61
Coolant radiator and oil cooler - check ............................................................................................... 62
V-belt - check...................................................................................................................................... 62
Exhaust system leakage - check ........................................................................................................ 62
Hydraulic oil - check ........................................................................................................................... 63
Water separator - check ..................................................................................................................... 63
Bucket bolt and bucket linkage bolt - grease...................................................................................... 64
Swing bracket - grease....................................................................................................................... 64
Other greasing points - grease ........................................................................................................... 65
Fuel level - check................................................................................................................................ 66
Washer system liquid level (cab version) - check............................................................................... 66
Electrical instrumentation - check....................................................................................................... 66
Setting up the workplace ...................................................................................................................... 67
Opening and closing the cab door (cab version) ................................................................................ 67
Opening and closing the windows (cab version) ................................................................................ 68
Adjusting the operator's seat .............................................................................................................. 69
Rear view mirrors adjustment............................................................................................................. 69
Seat belt ............................................................................................................................................. 69
Operating the excavator ....................................................................................................................... 70
Safety instructions for starting the engine .......................................................................................... 70
Starting the engine ............................................................................................................................. 70
Stopping the engine............................................................................................................................ 72
Observation of the displays after starting and during operation ......................................................... 72
Driving the excavator.......................................................................................................................... 75
Driving uphill and downhill .................................................................................................................. 78
Stopping on gradients......................................................................................................................... 78
Notes for rubber crawler operation ..................................................................................................... 79

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Operating the controls during excavation work .................................................................................. 80

Note on using wider and deeper buckets ........................................................................................ 80
Operating the dozer ......................................................................................................................... 81
Overview of control lever functions.................................................................................................. 81
Operating the boom ......................................................................................................................... 82
Operating the arm............................................................................................................................ 82
Operating the bucket ....................................................................................................................... 83
Swivelling the swivel frame.............................................................................................................. 84
Swinging the boom .......................................................................................................................... 84
Operating the auxiliary port.............................................................................................................. 85
Return change valve for direct return flow ....................................................................................... 86
Pressure relief of the hydraulic system............................................................................................ 87
Placing out of operation ....................................................................................................................... 87
Operating other equipment at the operator's place ........................................................................... 88
Operating the heating system (cab version) ...................................................................................... 88
Operating the wiper/washer system (cab version) ............................................................................. 90
Operating the interior light (cab version) ............................................................................................ 91
Operating the rotary beacon (accessories) ........................................................................................ 91
Operating the 12 V plug ..................................................................................................................... 91
Operating the working lights............................................................................................................... 92
Operating the battery cut-off switch ................................................................................................... 92
Cold weather operation ........................................................................................................................ 93
Necessary preparations prior to the winter season ............................................................................ 93
Operation during the winter season ................................................................................................... 93
Jump-starting the excavator ................................................................................................................ 94
Operating in emergency situations ..................................................................................................... 95
Engine stop knob ............................................................................................................................... 95
Manual lowering of the front attachments .......................................................................................... 95
Maintenance........................................................................................................................................... 96
Filling up the washer system .............................................................................................................. 96
Refilling the coolant ............................................................................................................................ 96
Refuelling the excavator..................................................................................................................... 97
Fill level monitor when refuelling ........................................................................................................ 97
Bleeding the fuel system .................................................................................................................... 98
Replacing the fuses............................................................................................................................ 98
Fuse layout of the fuse box............................................................................................................ 100
Main fuses ..................................................................................................................................... 100
Cleaning the excavator .................................................................................................................... 101
Replacing the bucket .......................................................................................................................... 101
Anti-theft system ................................................................................................................................. 102
Black (individual) key ....................................................................................................................... 102
Red key (for registering)................................................................................................................... 103
The key system ................................................................................................................................ 103
Registering a black key for the machine .......................................................................................... 104

TROUBLESHOOTING.................................................................................................................. 106
Safety rules for troubleshooting........................................................................................................ 106
Troubleshooting: Before operation ................................................................................................... 106
Troubleshooting: Operation............................................................................................................... 107
Troubleshooting: Display indications ............................................................................................... 108

MAINTENANCE............................................................................................................................ 111
Safety rules for maintenance ............................................................................................................. 111
Personnel requirements ..................................................................................................................... 111
Repair work on the machine .............................................................................................................. 112
Maintenance intervals......................................................................................................................... 112
Maintenance interval display ............................................................................................................ 112
Operator maintenance chart ............................................................................................................ 114
Skilled personnel maintenance chart ............................................................................................ 116

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Operating materials ............................................................................................................................ 118

Make the maintenance points accessible ......................................................................................... 120
Opening and closing the engine compartment cover ....................................................................... 120
Opening/closing the side cover ........................................................................................................ 121
Opening and closing the left service cover....................................................................................... 121
Opening and closing the right ventilation grille ................................................................................. 122
Maintenance work for the operator.................................................................................................... 123
Every 50 hours of operation ............................................................................................................... 123
Fuel tank - drain................................................................................................................................ 123
Battery service.................................................................................................................................. 124
Battery - check ............................................................................................................................... 124
Battery - load.................................................................................................................................. 124
Battery - change............................................................................................................................. 125
Swivel gear - grease......................................................................................................................... 126
Crawler tension - check/adjust ......................................................................................................... 126
Crawler tension - check ................................................................................................................. 127
Crawler tension - adjust ................................................................................................................. 128
Water separator - clean .................................................................................................................... 128
Every 200 hours of operation ............................................................................................................. 130
Swivel bearing - grease .................................................................................................................... 130
Interior air filter element - check/clean.............................................................................................. 130
Air filter element - check/clean ......................................................................................................... 131
Coolant hoses and clamps - check................................................................................................... 132
Fuel line and intake air hose - check ................................................................................................ 133
Every 1000 hours of operation ........................................................................................................... 133
Air filter element - change................................................................................................................. 133
Servicing by skilled personnel........................................................................................................... 134
Every 250 hours of operation ............................................................................................................. 134
V-belt - adjust ................................................................................................................................... 134
Pilot valve - grease ........................................................................................................................... 134
Every 500 hours of operation ............................................................................................................. 135
Engine oil and engine oil filter - change............................................................................................ 135
Engine oil - drain ............................................................................................................................ 135
Engine oil filter - change ................................................................................................................ 135
Engine oil - fill................................................................................................................................. 136
Drive unit oil - change....................................................................................................................... 136
Fuel filter cartridge - change............................................................................................................. 137
Return filter - change ........................................................................................................................ 138
Every 1000 hours of operation ........................................................................................................... 139
Hydraulic oil - fill/change................................................................................................................... 139
Hydraulic oil - drain ........................................................................................................................ 139
Hydraulic oil - fill............................................................................................................................. 140
Suction filter - change....................................................................................................................... 140
Heating pipes and hoses - check ..................................................................................................... 141
In-line filter - change ......................................................................................................................... 141
Interior air filter element - change..................................................................................................... 142
Pilot circuit filter - change ................................................................................................................. 142
Every 2 years ....................................................................................................................................... 143
Coolant - change .............................................................................................................................. 143
Bolted joints - check ........................................................................................................................... 145
Tightening torque for screws ............................................................................................................ 145
Tightening torque for hose clamps ................................................................................................... 145
Tightening torque for hydraulic hoses .............................................................................................. 146
Tightening torque for hydraulic pipes ............................................................................................... 146
Tightening torque for hydraulic adapters .......................................................................................... 146

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SAFETY INSPECTION ................................................................................................................. 147

TAKING OUT OF SERVICE AND STORAGE.............................................................................. 148

Safety rules for taking out of service and storage........................................................................... 148
Storage conditions.............................................................................................................................. 148
Measures before taking out of service.............................................................................................. 148
Measures during taking out of service.............................................................................................. 148
Start-up after taking out of service.................................................................................................... 149

LIFTING CAPACITY OF THE EXCAVATOR ............................................................................... 150

Constructive calculation of lifting capacity ...................................................................................... 150
Lifting attachment ............................................................................................................................... 151
Load suspension device..................................................................................................................... 152
Max. lifting load during swivel operation is 360° ............................................................................. 153

ACCESSORIES ............................................................................................................................ 156

KUBOTA Rotary beacon ..................................................................................................................... 156
KUBOTA Pipe safety valve ................................................................................................................. 156
Note on use................................................................................................................................. 157
KUBOTA Overload warning system .................................................................................................. 157
KUBOTA Quick coupling systems and attachments ....................................................................... 157
KUBOTA Bucket accessories ............................................................................................................ 157

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Abbreviations

% percent kV kilovolt
° degrees kW kilowatt
°C degree Celsius l litre
1/min revolutions per minute l/min litres per minute
A Ampere LpA sound pressure level operator's place
acc. according LwA measured sound power level
API American Petroleum Institute m metre
approx. approximately m/s² metre per square second
ASTM American Society for Testing and Materials m³ cubic metre
bar Bar max. maximum
CECE Committee for European Construction MIL Military Standards
Equipment
mm millimetre
CO2 carbon dioxide
MPa Megapascal
dB decibel
N Newton
DIN Deutsches Institut für Normung (German
Institute for Standards) OPG Operator Protective Guard

e.g. for example resp. respectively

EMC electromagnetic compatibility RMS Root Mean Square

EN Europäische Norm (European standard) ROPS Roll Over Protective Structure

GL Ground level s second

incl. including SAE Society of Automotive Engineers

ISO International Organization for Standardiza- t ton

tion TOPS Tipping Over Protective Structure
kg kilogramme V Volt
km/h kilometre per hour
kN kilonewton

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General symbols

Warning light Swivel boom (left)

Fuel indicator Swivel boom (right)

Engine oil indicator Dozer up

Charge indicator Dozer down

Glow indicator Lever direction

Hydraulic oil Control lever direction

Travel speed Rotary beacon

Low speed Display selector switch

Forward travel Auxiliary port indicator

Backward travel Working lights

Raise boom Horn

Lower boom Bolted

Arm crowd Released

Arm dump Fan

Bucket crowd Menu button

Bucket dump Insert key

Indicator coolant temperature Pull out Key

Service interval indicator Set clock indicator

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General information

General information
Foreword

These operating instructions apply only to the KUBOTA excavator U27-4, which complies with the follow-
ing EC declaration of conformity (page 11).

Safety instructions, the rules and regulations for the use of excavators given in these operating instructions apply
to the excavators mentioned in this documentation.

It is the responsibility of the owner(s):

 to ensure local, regional and national regulations are observed,

 to observe the bodies of rules (laws, regulations, guidelines, etc) stated in the operating instructions to ensure
safe handling of the equipment,
 to ensure that the operating instructions are always available for the operating personnel and the information,
such as notes, warnings and safety rules and regulations, are followed in all points.

The data in the operating instructions apply for all models. Information applying only to a certain model or only
optional equipment is highlighted (e.g. optional, U27-4).

The terms "front" and "direction of travel" refer to the view of the op-
erator when seated on the operator's seat. Forward direction of trav-
el means that the dozer is at the front when driving forwards as
shown in the figure.

Direction of travel

The symbols for operating and safety instructions are listed under "Safety symbols" (page 15).

EC declaration of conformity
With the EC declaration of conformity, KUBOTA Baumaschinen GmbH certifies that the excavator
is in conformity with the valid standards and regulations at the time of marketing. The CE conformity
marking is located on the type plate and indicates compliance with the regulations.

If the excavator is modified or retrofitted without the approval of the manufacturer, the safety of the excavator may
be affected, thus invalidating the EC declaration of conformity.

The EC declaration of conformity is attached to the operating instructions for delivery of the excavator.

Keep the EC declaration of conformity in a safe place and show it, if requested, to the responsible authorities.

Should the EC declaration of conformity get lost, please contact your KUBOTA dealer.

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 General information

Date of issue of the operating instructions

The date of issue of the operating instructions is printed on the bottom right of the front page of the book.

Operating personnel

The duties of personnel with respect to operation, servicing, repairs and safety inspections must be set forth clearly
by the owner.

Personnel in training are allowed to work on or with the excavator only under the supervision of an experienced
operator.

Operator

According to industrial safety regulations, only persons who were instructed in the operation of the excavator, who
have proven their qualification to the owner (employer) and who can be expected to perform their duties in a reli-
able way are allowed to operate the excavator independently.

Only trained and instructed personnel are allowed to work on or with the excavator.

Only instructed personnel are allowed to start the excavator and operate the controls.

Trained personnel

Trained personnel are skilled persons with a technical qualification who are able to determine damages to the ex-
cavator and perform repairs in their area of qualification (e.g. hydraulic or electrical engineering).

Qualified personnel

Based on their technical training and experience in their field, qualified personnel should have sufficient knowledge
about the technology used in this machine and be familiar with the applicable national work safety regulations,
accident prevention regulations and the generally accepted technical rules so that they can assess the safe con-
dition of the machine.

Location of the operating instructions

The operating instructions must always be kept on the excavator. If the operating instructions have become illeg-
ible due to continuous use, the owner (operator) must order a replacement from the manufacturer.

On the face of the seat console below the cover plate, you will find
a tray (1) for the operating instructions.

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General information

Spare parts

When ordering spare parts, please always provide the following information:

 Serial # of the excavator and year of construction (see type plate)

 Designation/type of spare part (see original KUBOTA spare parts catalogue)

 Part number of the spare part (see original KUBOTA spare parts catalogue)

 Quantity required

 Customer number

For written orders, please provide this information exactly, or for telephone orders, please have this information
ready before calling. This makes the process easier for us and for you, and prevents errors and incorrect orders
or deliveries.

Please place your order with your KUBOTA dealer.

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 Safety rules

Safety rules
Basic safety instructions

 The Use of Work Equipment Directive 2009/104/EC dated 16/09/2009 refers to the operation of the aforemen-
tioned excavator.

 The information in these operating instructions applies for maintenance and repairs.

 National rules and regulations apply where applicable.

Duties, liability and warranty

A basic requisite for the safe handling and problem-free operation of the excavator is the knowledge of the safety
instructions and safety regulations.

These operating instructions, in particular the safety instructions, must be followed by all persons working near or
with the excavator. Above and beyond this, the safety rules and regulations applicable for the site must also be
observed.

Hazards occurring during the handling of the excavator:

 The excavators are manufactured according to the state of technology and the recognized safety rules. Nev-
ertheless, danger to the life and limbs of the operator or a third party, or damage to the excavator or to other
property can occur. The excavator(s) may only be used

 for the approved use and

 in a completely safe operating state.

Malfunctions which can reduce safety must be repaired immediately.

Warranty and liability

The scope, period and form of the warranty are set forth in the sales and delivery conditions of the manufacturer.
The operating instructions valid at the time of delivery shall be the basis for any warranty claims arising from errors
in the documentation, see the date of issue of the operating instructions (page 12). The following applies above
and beyond the sales and delivery conditions: No warranty or liability shall be assumed for personnel and property
damages resulting from one or more of the following reasons:

 unapproved use of the excavator,

 improper starting, operation and maintenance of the excavator,

 operation of the excavator with defective safety devices or improperly installed or non-operational safety and
protective devices,

 ignorance or non-observance of these operating instructions,

 insufficiently qualified or insufficiently instructed operating personnel,

 improperly performed repairs,

 unauthorised engineering changes to the excavator,

 poor surveillance of machine parts subject to wear,

 catastrophes caused by the effect of foreign objects or an act of God.

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Safety rules

The owner must ensure at his own responsibility that

 the safety rules are observed (page 14),

 unapproved use (page 16) and unauthorised operation are excluded and

 the approved use (page 16) is ensured and the excavator is operated in accordance with the contractual con-
ditions of use.

Safety symbols

The following terms and hazard symbols are used in these operating instructions:

Identifies important operating procedure information which may not be immediately evident to the op-
erator.

Identifies operating procedures which must be followed exactly to prevent damage to the excavator
or other property.

STOP Identifies operating procedures which must be followed exactly to prevent danger to persons.

Identifies possible hazards in the handling of batteries.

Identifies possible hazards from caustic materials (battery acid).

Identifies possible hazards from explosive materials.

Prohibits the use of fire, ignition sources, and smoking.

Prohibits the spraying of water.

Identifies operating procedures for the proper disposal and storage of ensuing waste materials.

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 Safety rules

Approved use

The excavators specified in this operator's manual may only be used for to loose the ground, excavating, picking
up, transporting and dumping soils, rocks and other materials, for work with the dozer or with a breaker. The load
may be transported largely without driving the excavator. Do not exceed the maximum lifting capacity.

Approved use also includes:

 observation of all notes in these operating instructions,

 regular servicing,

 regular safety inspections.

Unapproved use

Any improper use – i.e. any deviation from the information in the "Approved use" section (page 16) of the excava-
tor documented in these operating instructions – is considered an unapproved use. This also applies to the non-
observance of the standards and guidelines listed in these operating instructions.

Hazards can occur in case of improper use. Such improper uses include:

 using the excavator to lift loads without suitable load lifting equipment,

 using the excavator in contaminated environments,

 using the excavator in closed rooms without insufficient ventilation,

 using the excavator under conditions of extreme temperatures (extreme heat or cold),

 using the excavator for underground works,

 using the excavator to transport persons in the bucket, and

 using the excavator for demolition without the corresponding equipment.

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Special duties of the owner

Owner of the excavator in the sense of these operating instructions is any person or company which uses the ex-
cavator itself or on whose order it is used. In special cases (e.g. leasing, rental), the owner is the person who must
perform the duties arising from operation according to the conditions of the contract between owner and user of
the excavator.

The owner must ensure that the excavator is only used properly and that any danger to the life and health of the
user or others who are in the proximity of the user are eliminated. Furthermore, observance of the safety rules and
regulations as well as the operating, maintenance and repair regulations must be ensured. The owner must make
sure that all operators and users have read and understood these operating instructions.

Persons who work with or on the excavator must be provided by the owner with, and where applicable use suitable
personal protective equipment (PPE), for example suitable working clothes, safety shoes, safety helmets, eye pro-
tection, ear protection and air-filter masks. The owner/employer bears the main responsibility for the PPE, which
is specified by the safety rules for particular types of activity.

Waste such as old oil, fuel, hydraulic fluid, coolant and batteries comes under the category of toxic waste and can
be a hazard to the environment, people and animals.

Disposal must be undertaken in an appropriate way, according to legally prescribed pollution control and safety
regulations.

If you have questions about the correct disposal or storage of refuse and toxic waste, contact your KUBOTA dealer
or a local waste management contractor.

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Noise emission and vibration

The values specified in this manual have been identified in the test cycle at an identical machine and are valid for
a standard equipment machine. The determined values are shown in the Technical Data (page 38).

Noise emission
The noise levels were determined using the method of determining the guaranteed sound pressure level of
ISO 4871 based on directive 2000/14/EC, appendix VI.

The noise levels shown are not applicable for the determination of additional workplace noise emissions. The ac-
tual noise levels may need to be determined directly at the workplaces, subject to actually existing conditions (oth-
er noise sources, special operating conditions, sound reflections).

Depending on the actual noise emissions the owner must provide the necessary personal protective equipment
to the operator (ear protection).

Noise of a noise level of more than 85 dB (A) can cause hearing damage.
STOP From a noise level of 80 dB (A), the use of an ear protection is recommended.
From a noise level of 85 dB (A), the operator must wear an ear protection.

Vibrations
The vibrations at the machine have been determined at an identical machine.

The vibration stress on the operator over a longer period of time must be determined by the owner at the site of
application, in compliance with directive 2002/44/ EC in order to consider individual magnitudes of influence.

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Safety instructions on the excavator

Keep the safety instructions (labels) on the excavator clean and legible, replacing them if necessary.

The positioning of the safety instructions is illustrated in the following figures.

1) Code #: RG248-5724-0
Risk of burns from hot components!
Surfaces can be hot and lead to burns.
 Do not touch hot parts, such as exhaust muffler, etc.

2) Code #: RG158-5723-0
Mortal danger from moving excavator!
When staying in the danger zone and in the case of a suddenly starting
excavator, there is the danger of being run over by the excavator.
 Only start the machine from the operator's seat.
 Do not start the machine by bypassing the starter poles.

3) Code #: RG158-5727-0
Mortal danger by crushing!
Low safety distance to the excavator and to obstacles can prevent
flight from the danger zone. Crushing by excavator results in severe in-
jury or death.
 Do not enter the manoeuvring area.
 Ensure safety distance to obstacles and sufficient freedom of
movement.

4) Code #: R2491-5736-0
Risk of fire from inflammable diesel fuel!
Inflammatory vapours can occur in the fuel tank, which may go up in
flames as a result of an ignition source.
 Do not use open flames in the area of the fuel tank.

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1) Code #: RG158-5789-0
Danger of cutting from rotating components!
The rotary fan can cut into the extremities.
Danger of crushing from rotating components!
The rotary belt drive can draw in limbs and crush them.
 Do not reach into rotating components.

2) Code #: RG158-5754-0
Risk of fire from hot components!
Escaping liquids can get onto hot components and catch fire.
 Before working on the engine, please read the operating instruc-
tions.

3) Code #: RG158-5785-0
Risk of burns from hot components!
Surfaces can be hot and lead to burns.
 Do not touch hot parts, such as exhaust muffler, etc.

3 2 1

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1) Code #: R2491-5796-0
Attachment point for lifting gear.

2) Code #: RG158-5722-0
Mortal danger by crushing!
Low safety distance to the excavator and to obstacles can prevent
flight from the danger zone. Crushing by excavator results in severe in-
jury or death.
 Do not stay in the swivel area of the boom.
 Ensure safety distance to obstacles and sufficient freedom of
movement.

3) Code #: RG138-5791-0
Danger of injury from components under pressure!
In the case of improper operating of the crawler tensioner, grease or
the pressure valve can splash out under high pressure can lead to inju-
ry.
 Before working on the crawler tensioner, please read the operating
instructions!

2
1

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1) Code #: RG109-5796-0
Not an attachment point for lifting gear.

2) Code #: RH418-5748-0
Max. lifting capacity during swivel operation is
360°
U27-4 (canopy)

3) Code #: RH418-5749-0
Max. lifting capacity during swivel operation is
360°
U27-4 (cab)

1 1

22 RH418-8135-3
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Safety rules

1) Code #: RG158-5732-0
Risk of burns from hot components!
Surfaces can be hot and lead to burns.
 Apertures, e.g., ventilation systems, and hot components, must not
be covered with hands.

2) Code #: RG138-5717-0
Risk of damage to components!
When using a wider or deeper bucket, take good care when swinging
or retracting the front attachments to make sure that the bucket does
not hit the cab.

3) Code #: RH418-5743-0
Risk of personal injury!
 Always buckle up.

1 23

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 Safety rules

1) Code #: RG158-5734-0
Risk of injury when entering or leaving the machine!
When entering or leaving the machine without a secure halt, you can
slip and fall down.
 Do not jump up or down on the excavator.
 Always hold the hand rail tightly with one hand.
 Make sure that you have a secure footing.

2) Code #: RG158-5729-0
Risk of injury from falling front window!
If the front window has been pushed up and not is properly bolted,
there is a risk that the front window will close automatically and hit the
operator in the head.
 Always lock front window securely.

3) Code #: RG158-5749-0
Risk of accidents by exceeded load when lifting!
When exceeding the nominal load, a beep sounds and a warning light
illuminates.
 Turn on overload warning function before starting a lifting opera-
tion!

3
2

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Safety rules

1) Code #: RG308-5702-0
Risk of accidents by incorrect operation!
Improper operating can lead to damage to the excavator, to serious ac-
cidents with high risk of injury and death as a result.
 Please read the operating instructions before commissioning.

2) Code #: RG158-5724-0
Danger of injury from liquids under pressure!
Escaping hydraulic oil under pressure can penetrate into the skin.
Risk of burns from hot components!
Surfaces can be hot and lead to burns.
 Apertures, e.g., ventilation systems, and hot components, must not
be covered with hands.

3) Code #: RG248-5724-0
Risk of burns from hot components!
Surfaces can be hot and lead to burns.
 Do not touch hot parts, such as exhaust muffler, etc.

2 3

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 Safety rules

Safety devices

Before starting the excavator, all safety devices must be installed properly and operational. No manipulation of
safety devices, e.g. the bypassing of limit switches, is allowed.

Protective devices may only be removed once

 the excavator is standing still and the engine is stopped

 and secured against restarting (starter switch in STOP position and key removed).

Locking the controls

The control levers (3 and 6) on the right and left, the drive levers (2),
1 2 3 4 5 6
the boom swing pedal (1), and the dozer control lever (5) are not op-
erational when the console (7) is raised. This circumstance allows
safe getting on and off. The console is unlocked and raised with the
control lever lock (4).

Engine stop knob

The engine is turned off when the starter switch (2) is switched in
position STOP.

If the engine cannot be turned off, please operate the engine stop
knob switch in order to turn off the engine.

To stop the engine:

 Pull the knob (1) until the engine stops.

 After the engine has stopped, push in the knob.

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Safety rules

Protective structure canopy and cab

The excavator is equipped with a protective structure that protects the operator from severe injury or
death if the excavator falls over or overturns and in the case of falling objects.

Canopy and cab were constructed in accordance with current safety standards and tested for verification as:

Roll-over protection ROPS (Roll Over Protective Structure)

Tipping-over protective structure TOPS (Tipping Over Protective Structure)

Driver protection OPG (Operator Protective Guard)

To ensure greatest protection by means of this protective structure, the following applies:

 The seat belt must be fastened while the excavator is being operated.

 Do not make any structural changes to the protective structure.

 In the event of damage, please contact your KUBOTA dealer. (Do not repair!)

 Never operate the excavator without the protective structure.

Use utmost care to avoid any risk of tipping, slipping, or other potential risks implied when lifting loads.
The operator must

 drive at reduced vehicle speed,

 avoid sudden braking,

 pick up the load at the centre,

 avoid sudden steering movements,

 make sure the load does not swing when travelling.

With the use of a hydraulic hammer or another attachment for demolition work, where material (e.g. asphalt) is
removed and can uncontrollably sputter away, a gravel guard is recommended for protection.

For demolition (according to EN 474-1, Annex G), e.g. tearing down walls, the corresponding protective equipment
is required (e.g. gravel guard).

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 Safety rules

Emergency hammer
In case of an accident where the excavator cab door and windows
can not be opened, the operator can break the window panes with
the emergency hammer (1).

When breaking the window pane, close your eyes and

STOP cover them with an arm.

Hazards coming from the hydraulic system

If hydraulic oil gets into the eyes, rinse them immediately with clear water and subsequently seek medical aid.

Do not allow hydraulic oil to contact the skin or clothing. Skin parts which may have come in contact with hydraulic
oil must be washed with water and soap immediately, if possible. Do this thoroughly and repeatedly, otherwise
there is a risk of damage to the skin.

Immediately take off any clothes dirtied or soaked with hydraulic oil.

Persons who have inhaled hydraulic oil vapours (mist) should be taken to a doctor immediately.

If leaks have occurred in the hydraulic system, the excavator may not be taken into operation or, if in operation,
operation must cease at once.

Do not use the naked hand to search for leaks; always use a piece of wood or cardboard. Protective clothing (eye
protection and gloves) must be worn when seeking leaks.

Leaking hydraulic oil must be bound immediately with an oil binding agent. The contaminated oil binding agent
must be stored in suitable containers and in accordance with the valid regulations.

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Safety rules

Fire protection
The excavator components and attachments (in particular the engine and the exhaust system) reach
STOP high temperatures even at normal working conditions. An electric installation which is damaged or
not properly serviced may lead to flashovers and/or electric arcs. The following Fire Protection Guide-
lines may help you ensure the maintenance and efficiency of your equipment and minimize fire haz-
ards.

 Remove any accumulated dirt adjacent to hot components, e.g. engine, muffler, exhaust manifold/tubes, etc.
If the machine is being used to full capacity, the cleaning procedure should be performed more frequently.

 Accumulated residues from plants and trees, or any other flammable materials, should be removed from the
machine. This must be observed in particular in the proximity of the engine and the exhaust system, but also
at the swivel frame, the track frame, and the boom.

 Check the condition and wear of all fuel lines and hydraulic hoses. Any defective parts should be replaced
immediately in order to avoid leakage.

 Electric lines and connections must be checked regularly for signs of damage. Damaged components and
lines must be replaced or repaired before starting up the machine. All electric connections must be kept clean
and solid.

 Exhaust pipes and mufflers must be checked daily for leaks, damage and any loose or missing joints. Leaking
or damaged exhaust system components must be replaced or repaired before starting up the machine.

 Always keep a multipurpose fire extinguisher at or close to the machine. Make yourself familiar with the op-
eration of the fire extinguisher. In the event of fire in the electrical or hydraulic system, use a CO2 fire extin-
guisher to combat the fire.

 For the attachment of a fire extinguisher (1), two threads (2) have been inserted in the cab construction on
the left side behind the operator's seat.

A fire extinguisher is not included in the standard

equipment of the machine.

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 Recovery, loading and transport

Recovery, loading and transport

Safety rules for recovery

 For recovery of the excavator, a towing vehicle of at least the same weight class as the excavator must be
used.

 A tow bar must be used for the recovery. If a tow rope is used, an additional vehicle to brake the excavator
must also be attached. The tow bar or tow rope must be suitable for the recovery of the excavator in respect
of the towed load. Do not use damaged recovery aids.

 Do not step into the danger zone between the vehicles during the recovery procedure. If a tow rope is used,
keep a distance of at least 1.5 times the length of the rope.

 Use the towing eye on the track frame for the recovery.

 The above safety rules also apply if the excavator is used as the towing or recovery vehicle.

 Observe the admissible values for the towed load and the maximum pressing load vertical down on the towing
eye during recovery, see "Specifications" (page 38).

Safety rules while loading with a crane

 Crane and lifting gear must be suited for the absorption of the load to be lifted and be approved.

 Before the use of the crane and the lifting gear, make sure that the specified safety inspections at regular in-
tervals have been carried out and that the crane and lifting gear are in good working order and impeccable
condition.

 The excavator may only be lifted at the points provided. Do not attach the lifting gear to the cab roof as this
can lead to substantial damage.

 Never attach a crane hook to the lower edge of the dozer! The crane hook can slip off sideways while lifting
and the excavator may fall off.

 Always adhere to the valid safety regulations for the lifting of loads.

 The excavator must be secured with a holding rope when it is being lifted.

 The crane operator is responsible for the observance of these safety rules.

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Recovery, loading and transport

Safety rules for transport

 The ramps must have a sufficient load capacity for bearing the weight of the excavator. They must be placed
securely on the transport vehicle and fastened.

 Support the loading area at the rear of the transport vehicle with sufficiently dimensioned supports.

 The ramps must be wider than the track of the excavator and have footboards on the side.

 The transport vehicle must be designed for the load of the excavator.

 Place the left and the right ramp so that the centre line of the transport vehicle is aligned with the centre line
of the excavator to be loaded.

 Do not drive the excavator onto the transport vehicle without ramps and with the boom.

 In the transport vehicle, pull the parking brake and secure the individual wheels of the transport vehicle at the
front and rear, respectively, with chocks.

 Secure the excavator against sliding on the transport vehicle with chocks or chains or with suitable tie-down
straps. The chocks must be secured at the crawlers and on the transport vehicle with suitable means. The
operator of the transport vehicle is responsible for the secure fastening of the excavator on the vehicle.

 A guide is required for driving the excavator onto and off the transport vehicle. The guide is responsible for
the safe loading. The excavator may only be moved on instruction of the guide; the operator and guide must
always have eye contact. If this is not possible, the operator must stop the excavator immediately.

 When driving with an excavator loaded, always keep a clearance of 1.0 m to overhead power lines. Observe
the applicable traffic rules and regulations.

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 Recovery, loading and transport

Recovery

Adhere to the safety rules (page 14) and the safety 1

STOP rules for recovery (page 30).

A recovery is only allowed over a short distance and at

walking speed (0.5 m/s ~ 1.0 m/s).

 Attach the tow bar or tow rope to the attachment point (1) on
the excavator and to the towing vehicle.

 If the attachment point of the excavator is not accessible, a tow rope can also be fastened around the centre
of the dozer.

 During the recovery procedure, the operator must be seated on the operator's place.

 Drive slowly with the towing vehicle to avoid abrupt loads.

Hoisting the excavator with a crane

Adhere to the safety rules (page 14) and the safety

STOP rules for hoisting the excavator with a crane (page 30).

 Bring the excavator to the lifting position (see figure) on level

ground. ≤ 30°

 Lift the dozer until the dozer cylinders are fully retracted. Also
see the "Operating the controls during excavation work" sec-
tion (page 80).

 Bring the boom in line with the longitudinal axis of the swivel frame.

 Bucket cylinders and arm cylinders, respectively, must be extended up to the stop position.

 Boom cylinders must be extended up to the stop position.

 Swivel the swivel frame so that the dozer is located at the rear.

 Close and lock the door and covers.

The excavator may only be lifted at the points provided. Do not attach the lifting gear to any other
STOP eyes or areas as this can lead to substantial damage.

32 RH418-8135-3
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Recovery, loading and transport

 Attach the lifting gear with shackles to the lifting eyes (1) on 1
each side of the dozer.

 Attach the lifting gear with shackles to the lifting eyes (1) on 1
each side of the boom.

Verladen-Kran_U25-4

 As soon as the lifting gear is attached to the excavator, press cloths between lifting gear and excavator to
protect the excavator.

 Always keep the machine level. Be sure that the centre line of the crane hook is aligned as exactly as possible
with the centre line of the excavator and that the lifting angle is as specified. Lift the excavator.

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 Recovery, loading and transport

Transport on a flat bed trailer

Adhere to the safety rules (page 14) and the safety

STOP rules for transport (page 31).

 Place the loading ramps on the transport vehicle at an angle of

10° to 15°. Observe the track width. Safely attach the ramps to
the transport vehicle to make sure they cannot slide while driv-
ing upwards.

Do not turn or steer while driving up the ramps; if necessary, reverse the excavator and drive up
STOP again after realigning it.

 Bring the excavator exactly into line with the ramps and drive up straight. Lower the dozer onto the loading
area.

Caution! Danger!
STOP No person is allowed to stand on the loading area during swivelling. Danger of crushing.

Take care during swivel operations. The front attachments could hit the transport vehicle. This could
damage the transport vehicle and the excavator.

 Turn swivel frame by 180° until the front attachments face the rear of the transport vehicle.

For securing the vehicle, tie down the points as shown in the figure.

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Recovery, loading and transport

 For safe attachment, fully crowd the arm and bucket and lower
the boom until the bucket linkage touches the loading area.

 Secure the chains and the dozer with beams (2).

 Secure the excavator against sliding on the transport vehicle

with chocks or chains (1) (note the vehicle weight).

 Lock the excavator after hoisting.

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 Description of the excavator

Description of the excavator

Dimensions

The dimensions of the model U27-4 can be found in the following figures and table.

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Description of the excavator

Cab

U27-4 A B C D E F G H I J K L M N O P Q R S U
1 580 610 1500 790 1350 1500 4370 3100 2820 2580 1980 2430 350 320 3200 990 4190 4630 4740 870

Canopy

U27-4 A B C D E F G H I J K L M N O P Q R S U
1 580 610 1500 790 1350 1500 4370 3100 2820 2580 1980 2430 350 320 3200 990 4190 4630 4740 850

Arm version

Name Type

1 Arm 1300 mm A = 1300 mm

A

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 Description of the excavator

Specifications
Following are the specifications for these series.

KUBOTA Excavator
Model name U27-4
Canopy
Type Rubber Steel
crawler crawler
Machine weight* kg 2490 2570
Operating weight** kg 2565 2645
Volume (CECE) m³ 0.060
Bucket Width with teeth 500
mm
(without teeth) (450)
Water-cooled three-
Type
cylinder diesel engine
Model name D1105-EBH-11
Engine Displacement cm³ 1123
Engine performance (ISO
kW (HP) 15.5 (21)
9249)
Rated speed 1/min 2400
Swivel speed (swivel
frame) 1/min 9.9

Travel speed km/h 4.5

Vehicle speed Low speed
Performance 2.5
km/h
Ground pressure kPa 23.7 24.5
(without operator) (kgf/cm²) (0.24) (0.25)
Climbing performance % (degrees) 36 (20)
Max. lateral sway % (degrees) 27 (15)
Dozer width x height mm 1500 x 300
Left rad (degrees) 1.31 (75)
Swing angle of the boom
Right rad (degrees) 0.96 (55)
Max. flow rate
L/min 48
Auxiliary port connector (theoretical)
Max. pressure MPa (bar) 17.2 (172)
Fuel tank capacity L 33
Pulling capacity at the towing eyes N 70500
Vertical load at the towing eyes N 7200
LpA dB (A) 79
Noise level
LwA (2000/14/EC) dB (A) 93
Digging m/s² RMS < 2.5
Hand-arm system Levelling m/s² RMS < 2.5
Vibration***

(ISO 5349-2:2001) Driving m/s² RMS 3.25

Idling m/s² RMS < 2.5
Digging m/s² RMS < 0.5
Whole body Levelling m/s² RMS < 0.5
(ISO 2631-1:1997) Driving m/s² RMS < 0.5
Idling m/s² RMS < 0.5
* With standard bucket 55 kg, operating readiness established.
** Machine weight incl. operator 75 kg.
*** These values are measured under specific conditions at maximum engine speed and can deviate, de-
pending on the operating situation.

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Description of the excavator

KUBOTA Excavator
Model name U27-4
Cab
Type Rubber Steel
crawler crawler
Machine weight* kg 2590 2670
Operating weight** kg 2665 2745
Volume (CECE) m³ 0.060
Bucket Width with teeth 500
mm
(without teeth) (450)
Water-cooled three-
Type
cylinder diesel engine
Model name D1105-EBH-11
Engine Displacement cm³ 1123
Engine performance (ISO
kW (HP) 15.5 (21)
9249)
Rated speed 1/min 2400
Swivel speed (swivel
frame) 1/min 9.9

Travel speed km/h 4.5

Vehicle speed Low speed
Performance 2.5
km/h
Ground pressure kPa 24.7 25.5
(without operator) (kgf/cm²) (0.25) (0.26)
Climbing performance % (degrees) 36 (20)
Max. lateral sway % (degrees) 27 (15)
Dozer width x height mm 1500 x 300
Left rad (degrees) 1.31 (75)
Swing angle of the boom
Right rad (degrees) 0.96 (55)
Max. flow rate
L/min 48
Auxiliary port connector (theoretical)
Max. pressure MPa (bar) 17.2 (172)
Fuel tank capacity L 33
Pulling capacity at the towing eyes N 70500
Vertical load at the towing eyes N 7200
LpA dB (A) 79
Noise level
LwA (2000/14/EC) dB (A) 93
Digging m/s² RMS < 2.5
Hand-arm system Levelling m/s² RMS < 2.5
Vibration***

(ISO 5349-2:2001) Driving m/s² RMS 3.25

Idling m/s² RMS < 2.5
Digging m/s² RMS < 0.5
Whole body Levelling m/s² RMS < 0.5
(ISO 2631-1:1997) Driving m/s² RMS < 0.5
Idling m/s² RMS < 0.5
* With standard bucket 55 kg, operating readiness established.
** Machine weight incl. operator 75 kg.
*** These values are measured under specific conditions at maximum engine speed and can deviate, de-
pending on the operating situation.

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 Description of the excavator

Identification of the excavator

The type plate of the excavator is located at the front of the swivel
frame. The owner should enter the stamped data in the field on the
back of the front cover.

1. CE label
2. Serial #
3. Max. pulling capacity at the towing eyes
4. Max. vertical load at the towing eyes
5. Product ID number PIN
6. Year of construction
7. Engine performance
8. Operating weight
9. Model name
10. Manufacturer

Serial # of the machine

The machine serial # (1) is stamped on at the track frame in the area
1
of the swing bracket.

Engine number
The engine number (1) is stuck on the valve cover of the engine.

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Description of the excavator

Standard equipment

This model has the following standard equipment:

 Operating instructions

 Spare parts catalogue

 Protective cover

 Filter wrench

 Grease gun

 Spare fuse (50 A, 60 A)

 Guarantee

Spare parts catalogue and guarantee can be kept together with the operating instructions(page 12).

The filter wrench must be stowed in the tool compartment (1) below
the seat.

The grease gun must be stowed in the storage location (1) behind
the left service cover on the swivel frame.

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 Assembly and functions

Assembly and functions

Component overview

18 19 20 21 22 23

17 3

4
1
16
5

15

2
14

13 12 11 10 9 8 7

1. Swivel frame 13. Boom cylinder

2. Track frame 14. Bucket
3. Cab 15. Bucket linkage
4. Operator's place 16. Auxiliary port connectors
5. Cab door 17. Bucket cylinder
6. Left service cover 18. Arm
7. Drive sprocket 19. Arm cylinder
8. Crawler 20. Boom
9. Idler 21. Working light (boom)
10. Dozer 22. Working lights (cab)
11. Dozer cylinder 23. Rear view mirror
12. Swing block

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Assembly and functions

Operator's place

The operator's place is located in the middle of the cab. It includes

1 2 3
the following control elements:

1. Left control console

2. Drive levers and control pedals
3. Right control console
4. Operator's seat

Left control console

The left control console includes the following components: 3 1

1. Control lever lock

2. Wrist rest
3. Left control lever 2

Description of the components of the left control console

1. Control lever lock
To enter and leave the cab, the console must be raised by pulling up the control lever lock. The engine can
only be started if the console is raised. The control levers, the drive levers, the boom swing pedal, and the
dozer control lever are only operational when the console is lowered and the control lever lock is in the "down"
position.

2. Wrist rest
The wrist rest allows fatigue-free operation of the control lever.

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 Assembly and functions

3. Left control lever

The left control lever is used to move the swivel frame and the
arm.

The figure, in conjunction with the following table, shows the

functions of the left control lever.

Position of control lever Movement

1 Arm crowd
2 Arm dump
3 Swivel frame to the left
4 Swivel frame to the right

Drive levers and control pedals

Drive levers and control pedals include the following components: 1 2

1. Left and right drive levers

2. Boom swing pedal
3. Auxiliary port pedal

Drive levers and control pedals – description

1. Left and right drive levers
With the drive levers the excavator can be driven forwards and backwards and also turned. The left drive lever
controls the left track and the right drive lever controls the right track.

2. Boom swing pedal

This pedal is used to swing the boom right and left.

3. Auxiliary port pedal

The auxiliary port pedal can be used to operate an attachment.

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Assembly and functions

Right control console

The right-hand control console contains the following components: 1 2
1. Display and control unit 3
14
2. One way hold switch 4
3. Travel speed button
4. Dozer control lever 13 5
5. Starter switch
6. Throttle lever 6
7. Wiper/washer switch (cab version) 12
8. Blower switch (cab version) 7
9. Engine stop knob
10. Rotary beacon button 8
11. Working light button
12. Wrist rest
9
11 10
13. Right control lever
14. Horn switch

Description of the components of the right control console

1. Display and control unit
The functions of the display and control unit are described in the "Display and control unit - description" section
(page 46).

2. One way hold switch

Operating the one way hold switch results in a continuous oil flow to the auxiliary port connector to the left of
the arm. When you operate it again, the oil flow discontinues. Thus, you can operate, for example, a breaker
without having to continuously hold down the button.

3. Travel speed button

The travel speed button switches the travel speed mode on and off.

4. Dozer control lever

The dozer control lever is used to raise or lower the dozer. Pushing the lever forward lowers the dozer and
pulling it back raises it.

5. Starter switch
The starter switch serves as the master switch for the entire machine and as switch for pre-glowing and start-
ing the engine.

6. Throttle lever
Using the throttle lever, the operator can adjust the engine speed in an infinitely variable manner.

7. Wiper/washer switch (cab version)

The wiper/washer switch switches on the wiper for the front window and/or the washer system.

8. Blower switch (cab version)

The fan is switched on with the blower switch. The air flow can be set to HIGH (HI) or LOW (LO).

9. Engine stop knob

Using this device, the operator can switch off the engine manually.

10. Rotary beacon button

The rotary beacon (accessory) is switched on with this button.

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 Assembly and functions

11. Working light button

Switches the working lights on or off.

12. Wrist rest

The wrist rest allows fatigue-free operation of the control lever.

13. Right control lever

The right control lever is used to move the boom and the buck-
et.

The figure, in conjunction with the following table, shows the

functions of the right control lever.

Position of control lever Movement

1 Lower boom
2 Raise boom
3 Bucket crowd
4 Bucket dump

14. Horn switch

Depressing the horn switch activates the horn.

Display and control unit

The display and control unit contains the following displays, buttons
14 15 16
and indicators: 1
13
1. Fuel gauge
2. Charge indicator 12 2
3. Indicator Coolant temperature
4. Coolant temperature gauge 11 3
5. Display
6. Display selector switch 4
7. Menu button
10
8. Warning light 9 5
9. Indicator Set clock
10. Indicator Servicing 8
11. Indicator Pull out key 7 6
12. Indicator Insert key
13. Travel speed indicator
14. Indicator Fuel stock
15. Indicator Pre-glowing
16. Engine oil pressure indicator

The display and control unit’s buttons are multifunctional and are also used to navigate the display
menu. You will find detailed descriptions of the individual functions in the respective chapters.

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Assembly and functions

Display and control unit - description

1. Fuel gauge
The fuel gauge indicates the relative fuel amount in the tank.

2. Charge indicator
The charge indicator lights up when the charging circuit voltage is too low.

3. Indicator Coolant temperature

The indicator Coolant temperature lights up if there is elevated temperature in the cooling circuit.

4. Coolant temperature gauge

The coolant temperature gauge indicates the temperature in the cooling circuit of the engine.

5. Display
The display can indicate time, engine speed hours of operation and coding system information.

6. Display selector switch

The display selector switch changes what is shown in the display.

7. Menu button
The menu button is used to switch on or off the menu guide in the display.

8. Warning light
The warning light flashes red when a system fault or technical malfunction occurs. The warning light flashes
yellow when the system issues a warning.

9. Indicator Set clock

If the clock needs adjustment (e.g. after disconnecting the battery for servicing purposes), the indicator Set
clock will flash.

10. Indicator Servicing

The indicator Servicing shines when a service period is due.

11. Indicator Pull out key

The indicator Pull out Key shines if the ignition key is to be pulled out.

12. Indicator Insert key

The indicator Insert key shines if the ignition key is to be inserted.

13. Travel speed indicator

The travel speed indicator lights up when the travel speed mode is activated.

14. Indicator Fuel stock

The indicator Fuel stock shines in the case of low fuel and requests refuelling

15. Indicator Pre-glowing

The indicator Pre-glowing shines with the switching of the starter switch in position RUN. When the indicator
goes off, it is possible to start the engine.

16. Engine oil pressure indicator

The engine oil pressure indicator lights up when the oil pressure is below the reference value.

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 Assembly and functions

Other equipment at the operator's place

Other equipment located at and around the operator's place is described below.

Interior lighting
An interior light (1) is located on the left side of the cab roof. It is
turned on and off with the switch (2).

Fuse box
The fuse box (1) is located below the operator's seat behind a cov-
er.

Tool compartment
The tool compartment (1) is located below the operator's seat be-
hind a cover plate.

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Assembly and functions

Cup holder
There is a cup holder (1) in the right control console.

12-V socket
A 12-V electrical outlet (1) for the connection of an external electric
1
device is located on the right-hand side control console.

Other equipment to be found at the machine

Other equipment located at and around the machine is described below.

Main battery
The main battery (1) is located on the right side of the vehicle under
the side cover.

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 Assembly and functions

Battery cut-off switch

The battery cut-off switch (1) can be used to cut off the main power
circuit. The battery cut-off switch is on the right vehicle side under
the side cover.

Return change valve for direct return flow

According to mode of operation of a given attachment, the return
flow of the hydraulic oil must either be via the control valve (indirect
return flow) or directly to the hydraulic oil tank (direct return flow).
1
With the change valve direct return flow (1), you undertake the set-
ting between "indirect return flow" and "direct return flow".

The switching valve for direct return flow (1) is located behind the
left service cover on the swivel frame.

Tank filler neck and fill level monitor

The tank filler neck (1) is located under the side cover on the right
2
of the machine.

The fill level monitor (2) is located to the left of the tank filler neck
and it indicates the fuel level when refuelling.

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Assembly and functions

Main fuses
The main fuses (1) of the excavator are situated above the battery.
1

Rear view mirror

The rear view mirrors (1) allow for visibility to the rear. The rear view
mirrors can be adjusted for optimum visibility of the respective are-
as.

Heating and ventilation (cab version)

Turning on and switching off of the heater fan and the air volume
control is via the blower switch (1) on the right control console.

Using the blower switch, air volume can be adjusted at two levels
LO and HI, where level HI stands for max. blower output.

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 Assembly and functions

Air intake as fresh air at the right cab wall or as circulating air in the
cab.

With the lever (1) the air intake can be switched between recirculat-
ed air (A) and fresh air (B).
B

The air is guided to the air nozzles (1) via the heat exchanger.

The heater valve (1) in the engine compartment regulates the sup-
1
ply of the heat exchanger with hot water from the cooling cycle.

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Assembly and functions

Hydraulic oil tank

The hydraulic oil tank contains the suction filter and the return filter.

1. Breather filter
2. Oil fill opening for hydraulic oil 1 2 3
3. Hydraulic oil tank
4. Sight glass for hydraulic oil level

Coolant radiator and hydraulic oil radiator

To the rear of the right ventilation grille at the rear of the excavator, are the coolant radiator and hydraulic oil radi-
ator.
The fill opening for the coolant radiator is located beneath the right side cover.

1. Coolant radiator
1 2
2. Hydraulic oil radiator

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 Assembly and functions

Engine compartment

The engine compartment (figure below) is positioned at the rear of the swivel frame; it is covered by a lockable
hinged cover.

10 1 2

9 8 7 6 5

1. Engine 6. Fuel filter

2. V-belt tensioner 7. Coolant expansion reservoir
3. V-belt 8. Oil dipstick
4. Oil filler opening 9. Muffler
5. Water separator 10. Air filter

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<Variable>RH418-

<Variable>RH418-
Operation
Safety rules for operation

 The safety instructions (page 14) must be followed.

 The excavator may only be operated according to its approved use (page 16).

 The excavator may only be operated by trained personnel (page 12).

 Do not operate the excavator when under the influence of drugs, medication or alcohol. Stop operation when
getting tired. The operator must be physically capable of operating the excavator safely.

 The excavator should only be operated if all protective devices are fully operational.

 Before starting or working with the excavator, make sure that there is no danger for any person nearby.

 Before starting the excavator, it must be checked for external damage and operability, and the pre-start
checks must be carried out. If defects are detected, the excavator should only be taken into operation after
the defects have been repaired.

 Wear tightly fitting working clothes in accordance with the trade association regulations.

 During the operation of the excavator, nobody except the operator is allowed to be inside the cab or get on
the excavator.

 For getting on and off, the swivel frame should be positioned in an angle which allows the operator to use the
crawler or the step (if applicable) to enter the cab.

 Always stop the engine when leaving the cab. In exceptional cases, e.g. for troubleshooting, the cab can also
be left with the engine running. The operator must make sure that the left control console remains in an upright
position. The controls may only be used while the operator is sitting on the operator's seat.

 During operation, it is forbidden to stretch any part of the body out of the window or cab door, such as arms,
legs, or the body.

 If the operator leaves the excavator (e.g. for breaks or at the end of work), the engine must be stopped and
the excavator must be secured against restarting by removing the key. The cab door must be locked. Before
leaving the excavator, park the machine so that it can not move.

 Whenever work is interrupted, the bucket must always be lowered to the ground.

 Do not allow the engine to run indoors, unless the room is equipped with an exhaust gas extraction system
or otherwise well ventilated. The exhaust gas contains carbon monoxide, a colourless, odourless, and lethal
gas.

 Never crawl under the excavator before the engine is stopped, the key is removed and the excavator is se-
cured against moving.

 Never crawl under the excavator if it is only raised with the bucket or the dozer. Always use suitable supports.

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 Operation

Safety for children

Children are normally attracted to machines and their normal operation. If children are in the vicinity
STOP of the machine and are not at a suitable distance and in the field of vision of the operator, this can
lead to serious accidents or even death of the children.

Always observe the following rules of conduct:

 Never assume that children will remain where you last saw them.

 Keep children far away from the working area and always under the supervision of other responsible adults.

 Be vigilant and switch the machine off when children enter the working area.

 Never let children drive with you on your machine, there is no safe place for passengers. Children could fall
off the machine and be run over or affect the control of the machine.

 Children must never operate the machine, even under supervision of an adult.

 Never let children play on the machine or attachments.

 Be particularly careful when manoeuvring. Look behind and down below on the machine and ensure that there
are no children in the manoeuvring area.

 Before leaving the machine, park it so that it cannot move. When leaving the machine (e.g. for breaks or at
the end of work), stop the engine, remove the key and close the cab door, if present.

Guiding the operator

 If the operator's working and driving area is obscured, the operator must be supported by a guide.

 The guide must be capable of performing this kind of work.

 Before starting work, the guide and the operator must agree the necessary signals.

 The guide's position must be clearly visible by the operator.

 The operator must stop the excavator immediately if the eye contact to the guide is interrupted.
 As a rule, either the excavator or the guide may move, never both at once!

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Operation

Working in the vicinity of overhead power lines

When working with the excavator in the vicinity of overhead power lines and tram lines, a minimum distance as
specified in the following table must be maintained between the excavator and its attachments and the power line.

Rated voltage [V] Safe distance [m]

up to 1 kV 1.0 m
over 1 kV up to 110 kV 3.0 m
over 110 kV up to 220 kV 4.0 m
over 220 kV up to 380 kV or when rated voltage is unknown 5.0 m

If safe distances can not be maintained, the power lines must be switched off in coordination with their owner or
provider and secured against making them live again.

When approaching overhead power lines, any possible movements of the excavator must be taken into consider-
ation.

Unevenness of the ground or sloping the excavator can reduce the safe distance.

Wind can cause the overhead power lines to sway, thus reducing the safe distance.

In case of a power cross-over, leave the danger zone with the excavator, if possible, by taking suitable measures.
If this is not possible, do not leave the operator's place, warn any approaching persons of the danger, and have
the power switched off.

Working in the vicinity of underground power lines

Before starting with excavation work, the owner of the excavator or the person responsible for the work must check
if there are any underground power lines in the proposed working area.

If there are underground power lines present, the position and routing of the power lines must be determined to-
gether with the owners or operators and the required safety measures must be determined.

If power lines are encountered or accidentally damaged, the operator must stop working immediately and inform
the responsible person.

Initial operation

Before initial operation, the excavator must first be checked visually for external transit damages and checked if
the shipped equipment is complete as ordered.

 Check fluid levels as described in the "Maintenance" section (page 111).

 For a description of all operation features refer to the "Operating the excavator" section (page 70) as well as
the following sections.

If defects are detected, please inform your dealer immediately.

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 Operation

Getting on the excavator

Risk of injury when entering or leaving the machine!
STOP When entering or leaving the machine without a secure halt, you can slip and fall down.
- Do not jump up or down the excavator.
- Always hold the hand rail tightly with one hand.
- Pay attention to a safe step.

 Move the left control console (2) up as far as possible by pulling

1 2
the control lever lock (1) up.

The control console must remain in this position until

the engine is started, as the engine can only be started
in this position.

 Get into the excavator, use the chain as a stepping aid.

 Sit down on the operator's seat.

Explanation of the display indications

If the starter switch is switched in position RUN, the time (3), the en-
gine speed (4) and the hours of operation (5) can be indicated in the
display (2).

For the selection of the display indication, press the display selector
switch (1) until the desired indicator appears in the display. 2

The following function can be carried out when the key

is not in the starter switch.
1

 Press the display selector switch (1). 3

In the display, the hours of operation are indicated for about 10 sec-
onds.
4

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Operation

Setting the clock

 Turn the starter switch to the RUN position.

 Press menu button (2).

 Press display selector switch (1) until the clock shows in the 4
display (3).

By pressing and holding of the display selector switch (1) the follow-
ing are selected in this order: year, month, day, 12 or 24 hour indi-
3
cator, hours and minutes for adjusting.

 Press display selector switch (1) and hold down.

When carrying out the setting process, the value to be 2 1

adjusted will blink up in the display and the indicator
(4) on the display and control unit.

 Press menu button (2) to reduce the numerical value.

 Press display selector switch (1) to increase the numerical value.

 To store the setting of the clock and to finish, press the display selector switch (1) once more and hold it down.
If the battery is separated from the electricity network, the data of the clock are deleted. After recom-
missioning the indicator Set clock blinks and requests the renewed setting of the clock.

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 Operation

Running-in of the excavator

During the first 50 hours of operation, the following points should be adhered to in all cases:

 Warm up the excavator at an average engine speed and with a low load; do not let it warm up at idling position.
 Do not overload the excavator.

Special maintenance instructions

Damage to equipment due to contaminated grease!
The grease plays a particular and important role in the running-in of the excavator. The movable com-
ponents are not yet broken in and generate many fine particles in the initial hours of operation that
drop into the grease. Changing the oil in due time removes the abraded metal particles, prevents
damage to equipment and preserves the service life of the components.
- Observe and adhere to oil change intervals!

 Change the oil in the final drives after the first 50 service hours.
 The hydraulic system's return filter should be changed after the first 250 service hours.

Pre-operational services
For the performance of the services, the excavator must be parked on level ground. The engine must
be turned off. The left control console must be raised.

 Open the engine compartment cover (page 120). Close engine compartment cover after completion of the ac-
tivities.
 Open the side cover (page 121). Always close the side cover after the work is done.
 Remove the right ventilation grille (page 122). Install the ventilation grille after completion of the activities.

Walk-around inspection
 Check the excavator for visible damage, loose nuts and screws and leaks.

 Check for any accumulated dirt adjacent to hot components, e.g. engine, muffler, exhaust manifold/tubes and
remove if necessary.

 Check for accumulated residues from leaves, straw, pine needles, twigs, bark and other flammable materials
and remove if necessary.

 Check the safety instructions (labels) on the excavator. They must be complete and legible (page 19).

 Ensure that the emergency hammer is present for the cab version (page 28).

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Operation

Dust valve - clean

 Empty the dust valve (1) on the air filter cover (2) by pressing it
together several times. 2

 If it is very dirty, remove the air filter and clean (page 131).

Engine oil level - check

 Pull out the oil dipstick (1) and wipe it with a clean cloth.

 Insert the oil dipstick completely and pull it out again. The oil
level should be in the "A" area. If the oil level is too low, add en-

A
gine oil (page 136).

When the oil level is too high or too low, the engine
might get damaged during operation.

Coolant level - check

 Check the coolant level in the expansion reservoir (1). The fluid 1
level must be between FULL and LOW.

STOP Do not open the radiator cap.

MAX
If the coolant level is below the LOW mark, refill cool- LL
ant (page 96). FU

If the coolant level is below the LOW mark a short time

after adding coolant, the cooling system is leaky. The W
excavator may only be started again after the fault is LO
repaired.

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 Operation

Coolant radiator and oil cooler - check

 Walk-around inspection of coolant radiator (1) and oil cooler (2)
1 2
for tightness and soiling.

If there is any dirt etc. on the radiators:

 Clean coolant radiator (1) and hydraulic oil radiators (2) from
the engine with a water jet or a compressed air gun. Do not use
high-pressure cleaners.

 Particular care must be devoted to the space between the radi-

ators, because foliage often collects at this point.

 After cleaning, check coolant radiator and hydraulic oil radiator

for damage.

V-belt - check

The engine must be switched off and the key removed!

STOP Do not attempt to grasp rotating or moving parts.

 Press in the V-belt (1) at position "A". The V-belt must give way
for approx. 7 mm (pressure: 7 kg). Adjust the V-belts if neces-
sary (page 134).

 Check condition of the V-belt, it must not have any cracks or A

other damage. Replace the V-belts if necessary.

Exhaust system leakage - check

 Check the exhaust system for leaks and security (formation of cracks).

STOP If the inspection is carried out when the engine is warm, there is a risk of burns at the exhaust system.

 If the exhaust system is leaky or loose, the excavator may only be taken into operation after the defects are
eliminated.

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Operation

Hydraulic oil - check

All hydraulic cylinders must be extended half way in

order to determine the exact hydraulic oil level.

Check the oil level in the sight glass (1). The oil level should be half
way up the sight glass. Carefully check the position of the hydraulic
cylinders before topping up the oil. For more information see the
"Topping up/changing the hydraulic oil" section (page 139).

Water separator - check

A red plastic ring in the water separator (1) floats up with the water
level. If the ring is floating up, clean the water separator (page 131).

OFF

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 Operation

Bucket bolt and bucket linkage bolt - grease

 Start the engine (page 70).

 Position arm and bucket as shown in the figure.

 Stop the engine (page 72).

 Lubricate all greasing points (see figure to the right) – see the
"Recommended lubricants" section (page 118) – by injecting
grease until fresh grease emerges.

Wipe emerged grease off immediately and store dirty

cleaning cloths in the containers provided for disposal.

Swing bracket - grease

 Lubricate both greasing points (see figure to the right) – see the
"Recommended lubricants" section (page 118) – by injecting
grease until fresh grease emerges.

Wipe emerged grease off immediately and store dirty

cleaning cloths in the containers provided for disposal.

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Operation

Other greasing points - grease

 Start the engine (page 70).

 Lower the bucket and the dozer onto the ground. Stop the engine, remove the key. Refer to the "Operating
the controls during excavation work" section (page 80).

 Lubricate all greasing points with grease – see the "Recommended lubricants" section (page 118) – until fresh
grease emerges.

Wipe emerged grease off immediately and store dirty cleaning cloths in the containers provided for
disposal.

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 Operation

Fuel level - check

The fuel gauge (1) indicates the relative fuel amount in

the tank. The less fuel is left in the fuel tank, the lower
the dial of the gauge.
 Turn the starter switch to the RUN position.

 Check fuel situation by looking at the fuel gauge on the display

and control unit.

 Refuel excavator if there is too little fuel left (page 97).

Ensure that the fuel tank is not run empty. Otherwise air will get into the fuel system. The fuel system
must then be bled.

Washer system liquid level (cab version) - check

Do not operate the washer system if its reservoir (1) is

empty as running dry could damage the pump.

 Check whether the liquid reservoir is full enough.

If the filling capacity is too low, fill washer system reservoir 1

(page 96).

Electrical instrumentation - check

 Check the function of the interior light (cab version) (page 91).

 Check the function of the working light (page 92).

 Check the function of the rotary beacon (accessories) (page 91).

 Check the function of the ventilation fan. For the subsequent heating operation, ensure that the heater valve
is open in the engine compartment (page 88).

 Check the function of the washer system (page 90).

 Check all accessible electric cables, connectors and connections for condition and security.

 Repair or replace damaged parts.

 Check the fuse box and fuse holders for oxidation and dirt, clean if necessary.

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Operation

Setting up the workplace

Opening and closing the cab door (cab version)

Opening the cab door from outside
 Unlock the cab door at the door lock (3).
1
 Open the cab door by pulling at the door handle (1) and lock the
door by attaching the hook (2) at the cab wall.

Closing the cab door

 Pull out release lever (1) and pull cab door shut until it latches.
1

Opening the cab door from the inside

 Pull the release lever (1) and open the door. If the cab door is
1
not closed again right away, lock the door at the cab wall.

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 Operation

Opening and closing the windows (cab version)

Front window

Always lock the front window. Do not stay in the cab 1

STOP and operate the excavator with the front window un-
locked. When opening the window, always keep both
hands on the grips (2) to prevent injury by pinching or
crushing.

The front window is opened and closed from the oper-

ator's seat.

2 2

Opening

 Press the right and left lock bars (figure above/1) inwards simultaneously and push the front window upward
at both grips (figure above/2) in the guide rails as far as the stopper. Lock the front window at the endpoint.
Check that the front window is locked.

Do not release the handles when raising the window as the front window could suddenly rise in an
STOP uncontrolled way and strike the operator's head. Please follow the safety instructions on the side win-
dow.

Closing

 Press the right and left lock bars (figure above/1) simultaneously and, using both grips (figure above/2), push
the front window forward within the guide rails up to the stopper. Lock the front window at the stopper by re-
leasing the lock bars. Check that the front window is locked.

Side window
 Pull the grip (1) to release the lock and pull side window open
to the rear or to the front.

 To close the side window, slide it forward or backward until the

lock snaps in at the window frame.

The front side window cannot be opened when the

rear side window is completely open.

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Operation

Adjusting the operator's seat

Adjust the operator's seat so that fatigue-free and comfortable working is possible. It should be pos-
sible to operate all controls safely.

Horizontal seat adjustment (seat stand-off)

 Pull the horizontal seat adjustment lever (4) up and move the
seat to the desired position by moving it forward or back, then
release the lever.

STOP Check that the seat is locked into place.

Spring adjustment (operator's weight)

 The seat can be set to the weight of the operator using the toggle (figure above, position/3). Refer to the
weight indicator (figure above, position/2) when choosing your setting.

 Sit down on the operator's seat.

 Swivel the toggle outwards by 90°.

 Pumping up and/or down,change the spring tension until the weight indicator shows your own weight.

Adjust the seat so that the arrow points to the centre of the weight indicator.

Backrest adjustment
Take the load off the backrest and pull up the backrest adjustment lever (figure above, position/1). Set the backrest
to the desired sitting position and release the lever. The backrest should be adjusted so that the operator can safe-
ly operate the control levers with the back resting completely on the backrest.

Rear view mirrors adjustment

 Check the adjustment of the rear view mirrors. If necessary, adjust the mirrors until the optimum sight is en-
sured.

Seat belt
 Buckle up the seat belt (1).

 Check that the seat belt is fastened tightly.

Do not operate the excavator without the seat belt fas-

STOP tened.

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 Operation

Operating the excavator

For a safe excavator operation, see the following sections.

Safety instructions for starting the engine

The excavator is equipped with an anti-theft system (page 102).

When starting the excavator for the first time on a work day, carry out the pre-operational services
(page 60).

STOP The safety rules for operation (page 55) are to be observed absolutely!

Make sure that there are no persons within the excavator's working area. It is essential to warn per-
STOP sons in the vicinity of the excavator by briefly honking the horn.

STOP Make sure that all operational controls are in the neutral position.

STOP Starting the excavator is only allowed when the operator is sitting on the operator's seat.

Before starting the engine, make the necessary operator station adjustments (page 67).

If the engine does not start immediately, cease the starting procedure. Wait a short time before reat-
tempting a start. If the engine does not start after several attempts, contact skilled personnel. If the
battery is discharged, jump-start the excavator (page 94).

Do not use Start Pilot or similar substances as a starting aid.

Starting the engine

 Push throttle lever (1) in the following direction . 2 1

 Insert the key into the starter switch (2) and turn it to the RUN
position.

The excavator is equipped with an anti-theft system. If

the excavator is started with a wrong key, the indicator
“Pull out key” (figure below/6) lights up on the display
and control unit.

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Operation

If the bunch of keys contains metal parts, such as key rings or other keys, the engine might fail to
start.

If the control lever lock is not raised, the warning light (5) shines yel-
low, the engine cannot be started. 1

The indicator Pre-glowing (1) lights up briefly. The engine can be

started after it goes off.
2
The engine oil pressure indicator (3) lights up and goes out after the 6 3
engine has been started.
4
The charge indicator (4) lights up and goes out after the engine has
been started. 5

If the indicators do not light up when the starter switch is in the RUN
position, remove the key and contact suitably skilled personnel.

If the fuel reserve indicator (2) blinks yellow, there is only a little fuel
is left in the tank, refuel excavator (page 97).

 Raise the control lever lock.

 Turn the starter switch to the START position and hold it there until the engine has started. Release the starter
switch.

 Lower the left control console and make sure that the control lever lock engages.

 Let the engine run at middle speed until the operating temperature has been reached.

After the engine has reached its operating temperature, set the engine speed required for operation:

 Pull throttle lever in the direction of until the required revolutions per minute have been reached.

The display selector switch (7) allows you to change between the
indication of time, engine speed or hours of operation in the display
(8).

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 Operation

The time (1) indicates the current time of day in hours and minutes.

The speed indicator display indication (2) indicates the current en-
gine speed. 1

The hour of operation indicator (3) indicates the hours of operation

of the excavator performed up to now, regardless of the engine
speed. 2

Check the displays and indicators during operation (page 72).

Stopping the engine

If the engine is to be stopped to take the excavator out of operation, the services for placing the ex-
cavator out of operation (page 87) must be carried out.

 Push throttle lever in the following direction .

 Raise the left control console.

 Turn the starter switch to the STOP position and remove the key.

If the engine cannot be turned off, please operate the engine stop knob switch (page 26).

Observation of the displays after starting and during operation

The operator must observe the display indicators and displays after starting and during operation.

The warning light (1) flashes red when a system fault

or technical malfunction occurs. Stop the engine im-
mediately! The warning light flashes yellow when the
system issues a warning. Additionally, the display may
show an error as in the figure on the right.

Clear the messages by taking appropriate steps, see

Troubleshooting: Display indications (page 108), or
contact skilled personnel if necessary.

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Operation

If the engine oil pressure becomes too low during operation, the en-
gine must be stopped immediately. The engine oil pressure indica-
tor (1) lights up, the warning light (2) flashes red and the display
message as in the figure on the right appears.
(lit up)

(flash-

If a fault occurs in the charging system during operation, the engine

must be stopped immediately. The charge indicator (1) lights up, the
warning light (2) flashes red and the display message as in the fig-
ure on the right appears.

(lit up)

(flash-

The needle of the coolant temperature gauge (1) should be in the

area between "C" (cold) and "H" (warm). If the needle rises up to
range "H" (Red), cool down the engine by changing into idle.

Allow the machine to idle for five minutes before

switching off the engine!

 Check the level of the coolant in the expansion tank.

STOP Do not open the radiator cap  Risk of scalding.

 Check the cooling system for leaks; if necessary, contact skilled personnel.

 Check if the V-belt is very loose or broken; if necessary, contact skilled personnel.

 Check if the air intake in the side panel, the radiator, and the oil cooler are very dirty. If necessary: Clean the
radiator (page 62).

When the machine is being operated at or close to full capacity, the

temperature of the coolant can rise a little higher than normal. The
indicator Coolant temperature (1) blinks and the message appears
in the display as shown in the figure on the right.

The message fades out after a short time and the indicator Coolant
temperature blinks as long as the temperature remains elevated.
(flash-
Operate the machine only with reduced loads until the operating
temperature is normal again.

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 Operation

If the coolant temperature is too high, cool down the engine by

changing into idle. The display message as in the figure on the right
appears.

Allow the machine to idle for five minutes before

switching off the engine!

(flash-
 Check the level of the coolant in the expansion tank.

STOP Do not open the radiator cap  Risk of scalding.

 If the water level is below the "LOW" mark, let the engine cool completely and add coolant (page 96).

 Check the cooling system for leaks; if necessary, contact skilled personnel.

 Check if the V-belt is very loose or broken; if necessary, contact skilled personnel.

 Check if the air intake in the side panel, the radiator, and the oil cooler are very dirty. If necessary: Clean the
radiator (page 62).

 Watch the fuel gauge (1).

The needle indicates the relative fuel amount in the

tank. As fuel is used up during operation, the needle
slowly descends.

When the fuel tank is full, the needle points to the top (A).

When the fuel tank is empty, the needle points to the bottom (B).

When the fuel reserve indicator (2) is lit, there is only a little fuel is
left in the tank, refuel excavator (page 97).

When operating the excavator on a slope, the fuel is displaced to one side of the fuel tank. In this
situation, when the fuel level is low, the fuel pump may not deliver enough fuel, causing the engine
to stall. The machine must be refuelled and the fuel system bled.

When the fuel tank is empty, the machine cannot be operated. The machine must be refuelled and
the fuel system bled.

Also stop the engine immediately if

 the engine speed rises or drops suddenly,

 abnormal noises are heard,

 the excavating devices do not respond to the control lever as expected or

 the exhaust fumes are black or white. When the engine is still cold, white smoke for a short time is normal.

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Operation

Driving the excavator

 Adhere to the general safety rules (page 14) and the safety rules for operation (page 55).

 Carry out the pre-operational services (page 60).

 Start the engine (page 70).

 Observe the displays and indicators (page 72).

Ensure that the boom and the dozer are in the direc-
tion of travel as shown in the figure.

Direction of travel

When driving with the excavator, always observe the

STOP following safety instructions.

When working on slopes, observe the tilt of the excavator (see fig-
ure).

Climbing performance  36 % or 20°

Max. lateral sway  27 % or 15°

 Keep the bucket as low as possible when driving.

 Check the ground for stability, and verify if there are holes or
other potential obstacles.

 Approach overhangs and edges of ditches carefully as they

could cave in.

 Drive slowly downhill, do not allow the vehicle speed to in-

crease uncontrollably.

 Close the cab door (cab version).

 When driving, the bucket should be approx. 200 to 400 mm (A)

over the ground (see figure).

 Raise the dozer to the top position.

 Select an appropriate engine speed.

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 Operation

Driving
 Push both drive levers forward simultaneously to drive the excavator straight ahead. Releasing the drive le-
vers stops the excavator immediately.
To reverse the excavator, pull both drive levers back simultaneously.

(A) Forward
(B) Reverse
(C) Straight ahead

If the dozer is not at the front, as shown in the figure,

STOP but at the rear, the operation of the drive levers is ex-
actly opposite. Drive lever forward  The excavator
backs up.

 To drive faster, press the travel speed button (1).

A tone sounds and the indicator (1) shines. Renewed operating of

the push button travel speed switches back to normal speed. Be-
sides, audible signal sounds and the indicator goes out.

Do not drive fast on muddy or uneven terrain, also if another control is operated (e.g. turning the swiv-
STOP el frame).

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Operation

Turning

Turns are described for the forward direction of travel with the dozer at the front. If the dozer is posi-
STOP tioned at the rear, the steering movements should be in the opposite direction.

STOP When making turns, be sure nobody is standing within the swing area of the excavator.

During driving

 Pull the left drive lever to neutral, leave the right drive lever
pushed forward.

(A) The excavator makes a left turn.

From a standing position

 Leave the right drive lever in neutral, push the left drive lever
forward. In this case, the turning radius is determined by the
right track.

(A) The excavator makes a right turn.

Turning on the spot

Do not make a turn on the spot with the travel speed

STOP button actuated.

 Move the drive levers in opposite directions. The tracks will turn
in opposite directions. The centre of the vehicle is its vertical
axis.

(A) Turning on the spot to the right.

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 Operation

Driving uphill and downhill

Exercise extreme caution when driving up and down a

STOP slope. Do not use the travel speed button.

 When driving on gradients, raise the bucket approx. 200 to

400 mm (A) above the ground (see figure).

 When driving on gradients, let the bucket slide over the ground
if the terrain allows it.

Stopping on gradients

Danger due to moving excavator!

STOP If the excavator is stopped on a slope, park it so that it
cannot move. Otherwise, there is a risk of being driven
over due to the moving excavator.
To securely park the excavator on gradients:

 Lower the dozer onto the ground.

 Dig the bucket as far as possible into the ground, or lower it

onto the ground.

 Put the controls into neutral position.

 Secure the excavator from moving using wedges (1).

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Operation

Notes for rubber crawler operation

 Driving or turning on sharp objects or over steps causes exces-
sive wear on the rubber crawlers and will lead to breaking of the
rubber crawler or cause the crawler running surface and the
steel inserts to be cut.

 Make sure that no foreign objects get stuck in the rubber crawl-
er. Foreign objects lead to excessive crawler wear and can
cause it to break.

 The crawler can become blocked due to too much dirt and sand. In this case, reverse the machine a short
distance in order to loosen dirt and sand.

 Keep oil products away from the rubber crawlers.

 Remove any fuel or hydraulic oil spilled on the rubber crawlers.

Making sharp turns

 On streets with a high-friction tarmac, e.g. concrete, do not make sharp turns.

Protecting the crawler against salt

 Do not work with the machine on the seashore. (The salt will cause the steel insert to corrode.)

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 Operation

Operating the controls during excavation work

STOP Always observe the following safety instructions when working with the excavator.

 Never crush concrete or boulders using side boom swings with the bucket.

 Do not use the dropping action of the bucket for excavation.

 Never fully extend the cylinders. Always keep a certain safety margin, especially when operating with a break-
er (accessory).

 Never use the bucket as a hammer to drive posts into the ground.

 Do not drive or dig with the bucket teeth rammed into the ground.

 When loading soil, do not dig the bucket deeply into the ground. Instead, make relatively shallow slices with
the bucket out as far as possible. This technique reduces the stress on the bucket.

 When working in water, the water should only reach up the lower edge of the swivel frame.

 After using the machine in water, always grease the pins at the bucket and arm with grease until the old lu-
bricating grease emerges.

 When digging in reverse direction, pay attention that the boom does not get into contact with the dozer.

 It is forbidden to use the excavator for lifting operations, unless it is equipped with a pipe safety valve for crane
operation (accessories) according to EN 474-5.

 Adhering soil can be shaken off when the bucket is being emptied by moving the cylinder to the end of the
stroke. Should this not suffice, dump the arm as far as possible and operate the bucket back and forth.

 When excavating, always lower the dozer completely onto the ground.

Note on using wider and deeper buckets

When using a wider or deeper bucket, take good care

when swinging or retracting the front attachments to
make sure that the bucket does not hit the cab.

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Operation

Operating the dozer

When working with the dozer, operate both drive le-

vers with the left hand and the dozer control lever with
the right hand.
 To lift the dozer, pull the dozer control lever (1) back.

 To lower the dozer, push the dozer control lever forward.

(A) Dozer up.

(B) Dozer down.

Overview of control lever functions

The figure shows, in connection with the following table, the func-
tions of the left and right control levers.

Control lever Movement

Right control lever 1 Lower boom
2 Raise boom
3 Bucket crowd
4 Bucket dump
Left control lever A Arm crowd
B Arm dump
C Swivel frame to the left
D Swivel frame to the right

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 Operation

Operating the boom

If the excavator is overloaded, the boom must be lowered until the load rests on the ground. To prevent personal
injuries and damage to equipment, do not operate any other functions (e.g. moving the swivel frame).

 To raise the boom, pull the right control lever back (figure/ ).

The hydraulic cylinder of the boom is equipped with a

cushioning function, which prevents the excavated
material in the bucket from falling out. When the hy-
draulic system operating temperature is low, the cush-
ioning is delayed for approx. 3 to 5 s. This delay is due
to the viscosity of the hydraulic oil and is not a mal-
function.

 To lower the boom, push the right control lever forward (fig-
ure/ ).

Watch the boom during lowering, so that the boom or

the bucket teeth do not hit the dozer.

The boom moves as shown in the figure.

Operating the arm

 To dump the arm, push the left control lever forward (figure/ ).

 To crowd the arm, pull the left control lever back (figure/ ).

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Operation

The arm moves as shown in the figure.

Operating the bucket

 To crowd (digging) the bucket, move the right control lever to
the left (figure/ ).

 To dump (empty) the bucket, move the right control lever to the
right (figure/ ).

When crowding the bucket, take care that the teeth do

not hit the dozer.

The bucket moves as shown in the figure.

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 Operation

Swivelling the swivel frame

No person is allowed to stand in the swivel area during

STOP the movement.

Swivel carefully to avoid any contact of the front at-

tachments with adjacent objects.

 To turn anticlockwise, move the left control lever to the left (fig-
ure/ ).

 To turn clockwise, move the left control lever to the right (fig-
ure/ ).

The turning operation takes place as shown in the figure.

Swinging the boom

No person is allowed to stand in the swing area during

STOP the movement.

Swing carefully to avoid any contact of the front attach-

ments with adjacent objects.

 To swing the boom counter-clockwise, press the boom swing

pedal on the left-hand side (figure/ ).
 To swing the boom clockwise, press the boom swing pedal on
the right-hand side (figure/ ).

The figure details the swing movement.

The boom swing control pedal can be secured against inadvertent operation by lowering the locking
flap. Fold the locking flap when the boom swing pedal is not in use.

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Operation

Operating the auxiliary port

The auxiliary port serves for operating attachments.

Only implements approved by KUBOTA may be used. The implements must be operated in accord-
STOP ance with the operating instructions supplied with them.

With the use of a breaker or another attachment for demolition work, where material (e.g. asphalt) is
STOP removed and can uncontrollably sputter away, personal protective equipment is absolutely to be
worn (safety shoes, safety helmet, eye protection, ear protection and if necessary facial mask). The
use of a gravel guard (front protective grid) is recommended. For excavation work with a cab, the
front window must be closed, in addition. For demolition (according to EN 474-1, Annex G), e.g. tear-
ing down walls, the corresponding protective equipment is required (e.g. gravel guard).

The performance data for the auxiliary port can be found in the "Specifications" section (page 38).

Make sure that, before carrying out the activities in the auxiliary port connectors, the pressure relief
STOP of the hydraulic system (page 87) has been carried out. Depending on the operation setting, the re-
turn change valve has to be set to the appropriate position (page 86).

The auxiliary ports may only be activated when an implement is attached.

If the auxiliary port has not been used for a longer time, dirt particles could have accumulated at the
connectors of the conduits. Before installing the implement, drain approx. 0.1 l of hydraulic oil at each
port.

Catch the drained hydraulic oil in a container and discard it in accordance with the valid environmen-
tal regulations.

 Start the engine (page 70) and keep it at idle speed until the operating temperature has been reached.

The auxiliary port pedal (1) can be protected against 2

unintentional operating by turning the locking flap (2).
If the auxiliary port pedal is not used, the locking flap
must be folded in.
 When operating the right pedal part (figure/ ) there is an oil
flow at the connector B (figure below).

 When operating the left pedal part (figure/ ) there is an oil flow
at the connector A (figure below).

B
A
1

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 Operation

(A) Connector for left pedal part

(B) Connector for right pedal part

B A

Return change valve for direct return flow

The change valve (1) has two switch positions.

When "direct return flow" is enabled, the return flow is directed from
the implement to the hydraulic oil tank via the return filter. The return
flow in only via the right auxiliary port connector at the arm. 2

The "direct return flow" switch position is used for

hammering attachments, such as a breaker.

 Swivel the lever (2) clockwise up to the stop.

The direct return flow is enabled. 1

When "indirect return flow" is enabled, the return flow is directed

from the implement to the return filter via the control valve and then
to the hydraulic oil tank. In this case, return flow can be via the left
or right auxiliary port connector (according to the position of the aux-
iliary port pedal) of the arm.

The "indirect return flow" switch position is used for ro-

tating attachments, such as a rotary gripper, an auger,
etc.

 Swivel the lever (2) anti-clockwise up to the stop.

The indirect return flow is enabled.

2 1

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Operation

Move the return change valve to the required position as shown in the figure, depending on the action of the im-
plement being used (rotary or breaking).

If the change valve is in position "direct return flow", although an attachment with indirect return flow
STOP has been mounted, the return flow to the hydraulic tank remains open!
This can lead to sudden movements or falling down of the attachment, even if the machine has been
switched off.
- Make sure that the change valve is switched according to the attachment.

Pressure relief of the hydraulic system

 Lower front attachments and dozer completely.
4
 Turn the starter switch to the STOP position.

 Wait until the engine has come to a standstill.

 Turn the starter switch to the RUN position.

Do not start the engine!

3

 Lower the left control console (1) and make sure that the con-
trol lever lock (2) engages. 2 1

 Move control levers (3 and 4) several times to limit stop in all

directions.

The hydraulic system is pressure relieved.

Placing out of operation

STOP Park the excavator in such a way that it can not move and is secured against unauthorised use.

 Drive the excavator onto level ground.

 Extend the hydraulic cylinders as follows:

Boom: Half-extended
Arm: Half-extended
Bucket: Half-extended
Dozer: Lowered to the ground
Swing mechanism: Front attachments lowered centrally to the ground

 Stop the engine (page 72).

 Remove the key.

 Unbuckle the seat belt and lift the left control console.

 Refuel the excavator, if necessary (page 97).

 Close and lock the cab door. The key must remain with the operator.

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 Operation

 Check the excavator for external damage and for leaks. Any defects must be repaired before the next start.

 In case of a heavy accumulation of dirt in the area of the tracks and the hinges at the front attachments, clean
the excavator (page 101).

Operating other equipment at the operator's place

Operating the heating system (cab version)

 Open the engine compartment cover (page 120).
1
 Open heater valve (1) by turning against the clock.
The heater valve should be always closed in summer.

 Close the engine compartment cover.

All activities described below and required for operating the heater must be carried out with engine
running.

To avoid accumulated heat and damage to the ventilation system, do not cover air nozzles with ob-
jects (e.g. bags or clothes) when the heater is on.

 Start the engine (page 70).

 Set the blower switch to position LO or HI.

HI
LO
OFF

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Operation

 To heat the cab faster, switch aerial supply to position circulat-

ing air (2) with lever (1).

No cold outside air will follow and the circulating inside air heats
3
faster.

So that the windows do not steam up at longer operation of the heat-

er, the aerial supply should be switched back to position "fresh air"
(3) after the warm-up phase of the cab is complete.

In dusty surroundings, the fresh air supply should be

switched on in order to increase the air pressure inside
the cab. This contributes to the fact that no dust pene- 1 2
trates into the cab.

Lasting circulating air mode leads to overtiring of the operator! Circulating air mode for a longer period
STOP of time can lead to lack of oxygen and overheating inside the cab. No cool fresh air flows in from the
outside. The operator therefore overtires quickly.

With operation-warm engine, the heater air flows out of the air noz-
zles (1).

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 Operation

Operating the wiper/washer system (cab version)

All cab models are equipped with a wiper/washer system.

Risk of personal injury!

STOP
When you turn the wiper on while the windscreen is opened, it slides out of the mounting on the cabin
frame and can cause impact inside the cab. There is a risk of injury when the wiper thereby hits the
operator's face.
- Do not turn on the wiper switch while the windscreen is open.

Switching on the windscreen wiper

 The starter switch is in the RUN position. 1

 Press the switch (1) to the WIPER/WASHER position.

The wiper operates as long as the switch remains in this position.

 To switch off, press the switch (1) to the OFF position.

In extremely cold weather conditions, make sure the wiper rubber does not stick to the window. This
can damage the wiper rubber or the wiper motor.

Only switch on the wiper when the window glass is wet. If necessary, switch on the washer system
first.

To turn on the washer system

The washer system can be operated irrespective of whether the 1
wiper is on or off.

If the wiper is on:

 Press the switch (1) to the WIPER/WASHER position again
and hold it down.
If the wiper is off:
 Press the switch (1) to the OFF position and hold it down.

The washer system runs for as long as the switch is held down.

Do not operate the washer system if its reservoir is empty as running dry could damage the pump.

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Operation

Operating the interior light (cab version)

 The starter switch is in the RUN position. 1

 Press the switch (2) to the ON position. OFF ON

The interior light (1) is illuminated as long as the switch remains in

this position. 2

 To switch off, press the switch (2) to the OFF position.

Operating the rotary beacon (accessories)

 The starter switch is in the RUN position.

 Press the rotary beacon switch (1) to the ON position.

The rotary beacon operates as long as the switch remains in this po-
sition. 1

 To switch off the rotary beacon, press the switch to the OFF po-
sition.

Operating the 12 V plug

 Open the cover cap (1) and put the load into the 12 V plug.
1

The rated current of the connected load must not ex-

ceed 10 A.

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 Operation

Operating the working lights

 The starter switch is in the RUN position.

 Press the working light button (1) to the ON position. The work-
ing lights on the cab are turned on.

 To switch off the working lights on the cab, press the button to
the OFF position. 1

During work on public roads other road users must not

be blinded.

Operating the battery cut-off switch

In order for the excavator to be operated, the battery cut-off switch
(1) must be in the ON position.
A  ON
B  OFF

If the battery cut-off switch is in the OFF position, most

of the electrically powered functions will be turned off
(e.g. horn, working lights, etc.).

The user settings for the display and control unit are
saved, and the battery discharges itself only minimally.

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Operation

Cold weather operation

Operating the excavator at an ambient temperature below 5 °C is regarded as cold weather operation.

Necessary preparations prior to the winter season

 If necessary, replace the engine oil and hydraulic oil with those of the viscosities specified for winter.

 Only use regular diesel fuel with winter additives. Do not mix petrol and diesel fuel.

 Check the battery's state of charge. In case of extremely low temperatures, it may be necessary to remove
the battery after work and store it in a heated room.

 Check the antifreeze strength in the cooling system (page 62). If necessary, add antifreeze until the protection
ranges from -25 °C to -40 °C.

 Apply talcum powder or silicone oil to all rubber seals at the windows, the cab door and the side window guide
rails.

 Lubricate all locks, except the starter switch, with graphite lubricant.

 Grease the cab door hinges.

 Fill the washer system with an antifreeze window cleaner (page 96).

Operation during the winter season

 The excavator must be cleaned after work is finished (page 101); Special attention must be paid to the crawl-
ers, the front attachments and the piston rods of the hydraulic cylinders. If the excavator is cleaned with a
water jet, it must then be parked in a dry, frost-free and well-ventilated enclosed space.

 If necessary, park the excavator on boards or mats in order to prevent freezing to the ground.

 Before starting, check if the piston rods of the hydraulic cylinders are free of ice to avoid damage. Also check
if the crawlers are frozen to the ground. If so, do not take the excavator into operation.

STOP Be careful when getting on and off, the crawler could be slippery.

 Start the engine (page 70) and let it run at idle speed until the engine has adapted to the outside temperature.
Before you start working with the front attachments, warm up the excavator until the operating temperature is
reached.

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 Operation

Jump-starting the excavator

Only a vehicle or starting device with a 12 V power supply may be used. A voltage > 12 Volts leads
STOP to serious damage to the excavator electronic system.

When servicing a battery, always wear suitable protective gloves and eye protection.

The operator must remain seated on the operator's place, the battery jumper cables must be con-
nected by a second person.

 Make the battery accessible, and remove the positive terminal cover.

 Position the other vehicle or starting machine beside the excavator.

Only use cables with an appropriate cross section as

jumper cables.

 Connect the positive terminal of the excavator battery with the

positive terminal of the helping vehicle (see figure).

 Connect the negative terminal of the helping vehicle to the

frame of the excavator. Do not use the negative terminal of the
excavator battery. The connecting point on the frame must be
blank and clean.

 Start the helping vehicle and let it run at a higher idle speed.

 Start the engine (page 70) and let it run at idle speed. Check if the charge lamp turns off after starting.

 Disconnect the jumper cable at the frame of the excavator first, and then at the negative terminal of the helping
vehicle.

 Disconnect the second jumper cable from the positive terminal of the excavator battery first, and then from
the positive terminal of the helping vehicle.

 Place the positive terminal cover onto the excavator battery.

 If the jumper cables will be required for the next start of the excavator, check the battery and the alternator's
charging circuit, contact skilled personnel, if necessary.

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Operation

Operating in emergency situations

In case of emergency, you can switch off the engine and lower the boom manually.

Engine stop knob

If the engine cannot be stopped with the key, it can be stopped man-
ually.

 To stop the engine, pull the knob (1) until the engine stops.

 After the engine has stopped, push in the knob.

STOP The excavator may only be taken back into operation after the malfunction has been eliminated.

Manual lowering of the front attachments

The boom and arm can be lowered in case of an engine failure or if malfunctions occur in the hydraulic system.

 The starter switch is in the RUN position.

 If necessary, lower the boom and the arm with the control levers as described in the "Operating the controls
during excavation work" section (page 80).

Make sure nobody is standing in the lowering area before starting the emergency lowering proce-
STOP dure.

The lowering function is available only for a short time, as it is controlled by the accumulator in the
hydraulic system. The cylinders extend or retract by force of gravity.

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 Operation

Maintenance

Filling up the washer system

 Open the cap (1) of the washer system reservoir (2) and add
1
water or a cleaning agent.

In winter, use a cleaning agent with antifreeze.

Refilling the coolant

 Open the engine compartment cover (page 120).

 Check the antifreeze content with an antifreeze tester that is

qualified for -25 °C.

The antifreeze portion of the coolant should not ex-

ceed 50 %. 1

 Open the coolant expansion reservoir cap when the engine is

cool and fill pre-mixed coolant up to the FULL mark (1).

 Close the expansion tank cover.

If the coolant expansion reservoir was completely empty, check the

coolant level in the radiator.

Do not open the radiator cap while the engine is still 1

STOP hot, risk of scalding.

 Open the side cover (page 121).

 Remove the radiator cap (1) by turning it anticlockwise.

 The coolant level should be at the lower mark of the filler plug;
if not, add coolant.

 Close the radiator cap.

 Close the side cover.

 Close the engine compartment cover.

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Operation

Refuelling the excavator

When refuelling the excavator, smoking, an open flame, or other sources of ignition are not allowed.
The danger zone has to be clearly marked with signs. A fire extinguisher must be kept at hand in the
danger zone.

Spilled fuel must be bound immediately with an oil binding agent. The contaminated oil binding agent
must be disposed of in accordance with the applicable environmental regulations.

STOP If no pumping station is available, the diesel fuel may only be stored in approved canisters.

Refuel the excavator in time so that the fuel tank is not running empty. Air in the fuel system can dam-
age the fuel injection pump.

To prevent the formation of condensate water in the fuel tank when the excavator is stopped for long
periods, fill diesel fuel up to the lower edge of the filler neck.

 Stop the engine.

 Open the side cover (page 121).

 Remove the filler cap (1) by turning it anticlockwise.

 Fill diesel fuel up to the base of the filler neck.

 Screw on the filler cap and close the side cover.

Fill level monitor when refuelling

The momentary fill level during refuelling can be determined by
2 1
means of an acoustic signal. For this, the starter switch must be in
the STOP position.

The switch (2) for the fill level monitor is located to the left of the tank
filler neck (1).

 Ensure that the starter switch is switched to the STOP position.

 Press switch (2) to activate fill level monitoring.

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 Operation

The following signals are output:

Interrupted signal  Tank is empty
Periodic signal  Tank is being filled
Continuous signal  Tank is full

The signal breaks off completely if the flow rate is too

low. As soon as there is enough fuel in the tank, the
signal restarts.

Press switch (2) after refuelling to deactivate fill level monitoring.

Bleeding the fuel system

If the excavator fuel tank was run empty or the water separator was cleaned, the fuel system must
be bled.

 Ensure that there is sufficient diesel fuel in the fuel tank. Otherwise, refuel the excavator.

 To bleed the fuel system, move the starter switch to the RUN position. The electrical fuel pump will bleed the
fuel system automatically within approx. 60 s.

 If the bleeding was insufficient, the engine will stop again. In this case repeat the procedure.

Replacing the fuses

Defective fuses may only be replaced with fuses of the same type and same rating.

The bypassing of fuses, for example by a wire, is not allowed.

If the malfunction can not be remedied by replacing the fuse, or if the fuse blows again when starting,
contact skilled personnel.

The main fuses (page 100) of the excavator are situated next to the battery.

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Operation

 Unlock and fold down the cover plate (1).

 Remove the fuse box cover (2).

The fuses (1) are arranged in two rows in the fuse box.
1
Next to this, there is another fuse puller (2).

 Remove the defective fuse using the fuse puller (2) and replace
2
it.

Observe the following fuse box layout!

 Check the component function after replacing the fuse. If the

fault still exists, contact your KUBOTA specialist dealer.

 After finishing the work, install the cover on the fuse box and
close the cover plate.

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 Operation

Fuse layout of the fuse box

1 Fan motor 10 A 11 Control lever lock 5A

2 Electrical connection 15 A 12 Alternator 10 A
3 Wiper/washer system 15 A 13 Control unit (+B) 10 A
4 Radio (AC) 15 A 14 Interior lighting 5A
5 12-V socket 15 A 15 Rotary beacon 15 A
6 Starter 30 A 16 Working lights 15 A
7 Starter (signal) 5A 17 Horn 10 A
8 Fuel pump 5A 18 Engine cut-off switch 30 A
9 Relay supply circuit 5A 19 Horn switch 5A
10 Control unit (AC) 10 A 20 Display and control unit (+B) 10 A

Main fuses
 Take out defective main fuse and replace. 1 2
Fuse layout:
1 Main fuse (50 A)
2 Main fuse (60 A)
3 Fuse (10 A)

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Operation

Cleaning the excavator

STOP Before cleaning, shut down the engine and secure it against starting.

If a steam cleaner is used for cleaning the excavator, do not direct the steam jet at electric compo-
nents.

Do not direct a water jet into the intake opening of the air filter.

Do not clean the excavator with inflammable liquids.

The excavator may only be washed at suitable places (using oil and grease separators).

The excavator can be cleaned with water and a commercial cleaning agent. Make sure no water gets into the elec-
trical system.

Use a plastic cleaner for plastic parts.

Replacing the bucket

STOP When replacing the bucket, make sure to wear an eye protection, a helmet and protective gloves.

During attaching and detaching, chippings and burrs may occur at the bolts or bushings. These may
STOP cause severe injuries.

Never use your fingers for the alignment of the components (linkage, bucket, arm). The components
STOP may sever your fingers by uncontrolled movements.

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 Operation

Anti-theft system

The excavator is equipped with an anti-theft system that restricts the engine to be started using a registered key
only. If a registered key gets lost or stolen, you can invalidate it. This will prevent the engine from being started
with this key, thus protecting the vehicle against theft. The anti-theft system makes it difficult to steal the machine.
However, it can not fully prevent theft.

If the starter switch is set to STOP, the indicator light (1) is illuminat-
ed, indicating the activation of the anti-theft system.

Make sure that the indicator light is illuminated when leaving the
machine.

The vehicle comes with two different types of keys:

Black (individual) key

 This key is used to start the engine.

 The engine can be started by inserting the key and turning it to

the START position.

 To be able to start the engine with a black key, it must be reg-

istered using the red key.

The engine can be started only with a key that was registered for the particular vehicle.
The scope of delivery includes two black keys, among them a spare key. The two black keys have
already been registered. Up to four keys can be registered.

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Operation

Red key (for registering)

 If one of the black keys is lost, another black key can be registered using the red key (page 104).

 The engine can not be started with the red key.

The key system

 If a registered key is lost, the second and new black key must be re-registered. This procedure locks the lost
or stolen black key, which can no longer be used to start the engine.

 If the red key is lost, the black keys can no longer be re-registered. Be sure to keep the red key in a secure
location (such as a safe in the office). Never leave the key inside the machine. If it should get lost neverthe-
less, please contact your authorised dealer immediately.

 If six times attempts are made within one minute to turn the starter switch to the START position with a wrong
or unregistered key, an acoustic signal will sound for 30 seconds. The signal will continue to sound even if the
starter switch is turned to the STOP position again or the key is removed within this time period. When a key
registered for this machine is inserted into the starter switch, the acoustic signal will be turned off.

 Do not use several of these keys in a bunch. This could lead to electrical interfering frequencies which might
prevent the motor from starting.

 Use only the special KUBOTA key ring. Other key rings can lead to signal failures between the key and starter
switch, and the engine can possibly not start or a key registration cannot be performed.

 After receiving the set of keys, separate them from each other. Always make sure the keys are not part of a
bunch. If one of the black keys, for example, is inserted into the starter switch, the red key might be detected
by the electronic system. This might lead to a failure of the electronic system.

 If machine malfunctions occur, please contact your KUBOTA dealer immediately in order to have the malfunc-
tion localised and remedied.

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 Operation

Registering a black key for the machine

Register a black key only under the following conditions:
STOP Make sure that there are no persons within the excavator's working area. It is essential to warn per-
sons in the vicinity of the excavator by briefly honking the horn.

Make sure that all operational controls are in the neutral position.

Starting the excavator is only allowed when the operator is sitting on the operator's seat.

Do not allow the engine to run indoors, unless the room is equipped with an exhaust gas extraction
system or otherwise well ventilated. The exhaust gas contains carbon monoxide, a colourless, odour-
less, and lethal gas.

1. Insert red key into the starter switch.

Do not turn the key at this point. If the key is in the RUN
position, turn it back to the STOP position.

2. Press the display selector switch.

3. The indicator Pull out key blinks.

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Operation

4. Pull out the red key.

5. The indicator Insert key blinks.

6. Insert black key into the starter switch.

Do not turn the key at this point. If the key is in the RUN
position, turn it back to the STOP position.

7. After a short moment, the indicator Pull out key blinks. This
points out the fact that the black key has been registered for
this vehicle.

8. Turn key into position RUN to complete the registration process.

9. One after the other, insert all registered black keys into the starter switch and check whether the engine can
be started using these keys.

If a registered black key is lost, the other black keys must be re-registered. This procedure locks the
lost or stolen black key, which can no longer be used to start the engine.

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 Troubleshooting

Troubleshooting
The troubleshooting section includes malfunctions and incorrect operations which according to the maintenance
chart, must either be remedied by the operator or by skilled personnel. Any other malfunctions may only be elim-
inated by trained personnel. The troubleshooting must be performed with the aid of the troubleshooting table. In
order to locate a malfunction, first look in the MALFUNCTION column for the corresponding excavator malfunction.
In the POSSIBLE CAUSE column you will find the possible causes for the malfunction. The REPAIR column indi-
cates the required remedial measure. If the fault cannot be remedied by the measure indicated in the REPAIR
column, please consult your
KUBOTA dealer.

Safety rules for troubleshooting

Adhere to the general safety rules (page 14) and the safety rules for operation (page 55).

The operator is not allowed to open the electrical and hydraulic system. These services are reserved for trained
personnel.

During troubleshooting, the safety on and around the excavator must always be ensured.

If troubleshooting of the excavator calls for the bucket being raised, the operator may not stand in the area of the
front attachments unless the front attachments are secured against inadvertent lowering by suitable measures.

Troubleshooting: Before operation

MALFUNCTION POSSIBLE CAUSE REPAIR

No function available when the Main fuse at battery defective Replace the main fuse (page 100).
starter switch is turned to the RUN
position.
Indicator lights do not come on as Defective fuse Replace the fuses (page 98).
expected when the starter switch is
turned to the RUN position.
Starter does not turn when the start- Battery depleted Charge the battery (page 124).
er switch is turned to the START po- Jump-starting the excavator
sition. (page 94).
Engine stop knob pulled Push the engine stop knob
(page 26).
Control lever lock not raised Raise the control lever lock.
Engine does not start when the Air in the fuel system Check the fuel system for leaks and
starter switch is turned to the bleed it (page 133).
START position, but starter turns.
Water in the fuel system Check the water separator for water
content, drain water if necessary
(page 63).
Fuel is too viscous Check fuel tank and fuel filter; re-
move contamination and water; re-
place fuel filter if necessary.
Engine runs sluggishly during win- Oil viscosity is too high Warm up the radiator, e.g. pour
ter time. over some hot water.

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Troubleshooting

Troubleshooting: Operation

MALFUNCTION POSSIBLE CAUSE REPAIR

Insufficient engine power Air filter restricted Check, clean and replace the air fil-
ter (page 131).
Fuel filter restricted or water in fuel Check the water separator for water
system content. Drain it (page 63) and re-
new the fuel filter (page 137), if nec-
essary.
No hydraulic function of the drive Control lever lock is raised. Lower the control lever lock.
unit, the swing mechanism and the
front attachments.
Power of hydraulic functions is too Hydraulic oil level too low Check the hydraulic oil level, add
low or disruptive. hydraulic oil (page 63).
Suction filter restricted Change the suction filter in the hy-
draulic oil tank (page 140).
Travel speed button does not work. Fuse in fuse box defective Replace the fuses (page 98).
Heater fan, wiper/washer system, Fuse in fuse box defective Replace the fuses (page 98).
interior light, horn, working light not
operating.
Coolant temperature is too high. Coolant is mixed with rust from the Change coolant and add corrosion
cylinder head or crankshaft hous- inhibitor.
ing.
V-belt is damaged or very loose Replace and/or tension it
(page 134).
Continuous operation under full Operate the machine only with re-
load. duced loads until the temperature is
normal again.
Coolant level too low Refill coolant (page 96).
Leaky cooling system components Check the cooling system for leaks,
see the "Changing the Coolant"
section (page 143).
Dirty radiator and/or condenser Clean the radiator and condenser
(page 62).
Radiator cap (venting) is defective Replace it; consult your KUBOTA
dealer if necessary.
Engine oil level is too low Check the engine oil level, add en-
gine oil if necessary (page 136).
Fuel quality is low Use fuel according to EN 590 or
ASTM D975.
Exhaust gas colour very black. Fuel quality is low Use fuel according to EN 590 or
ASTM D975.
Engine oil level is too high Check engine oil level, drain engine
oil down to specified level if neces-
sary.
Air filter restricted Check, clean and replace the air fil-
ter (page 131).
The engine stops suddenly. Fuel shortage Check the fuel level; refuel and
bleed if necessary.
Deviation in driving direction of ex- Crawler tension adjusted incorrectly Check and adjust the crawler ten-
cavator. sion, if necessary (page 127).
Blocked by stones Remove the stones.

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 Troubleshooting

Troubleshooting: Display indications

If the machine develops a fault, one of the following messages will appear on the display. In the event
of problems please inform your KUBOTA dealer immediately.

No. Display Indicator Problem/Error Preliminary Measure Solution

1. CAN system Error The Controller The machine can be Inform your
Area Network started and driven. Do KUBOTA dealer im-
(CAN) has devel- not perform any work mediately.
oped a fault. Meas- with the machine.
ured values may
be incorrect and
switches may not
function.
2. Feed fuel This message ap- - Refuel the excava-
No display pears when the tor.
fuel level is low and
prompts the opera-
tor to refuel.
3. Periodic check This message Operate the machine Ask your KUBOTA
soon (notice) means that the reg- as usual. dealer about the rel-
No display ular service is due evant parts. Run the
shortly. maintenance proce-
dure.
4. Period check This message The machine can be Ask your KUBOTA
passed (warning) means that the reg- operated but service dealer about the rel-
No display ular service is due. must be carried out evant parts. Run the
urgently. maintenance proce-
dure.
5. Water tempera- The temperature of Operate the machine -
ture raising the coolant is high- only with reduced
er than normal. loads until the temper-
ature is normal again.

6. - - - - -
7. Wrong key, unable The machine can- Use the correct key. -
to start not be started be-
No display cause the wrong
key has been in-
serted.
8. RED registration Try starting the en- Use the correct key. -
key, unable to gine with the red
start key (for registra-
No display tion).

9. Clock setting re- Power was inter- To adjust the clock, -

quest rupted and the press the display se-
No display clock now has to lector switch.
be set again.
10. - - - - -
11. Raise the control This message indi- Raise the control lever -
lever lock cates a step in a lock; the indicator
No display procedure. goes out.
(yellow)

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Troubleshooting

No. Display Indicator Problem/Error Preliminary Measure Solution

12. Pull out Key The key must be Pull out Key. -
No display pulled out.

13. Lower the control This message indi- Lower the control le- -
lever lock cates a step in a ver lock; the indicator
No display procedure. goes out.
(yellow)
14. Oil pressure too The engine oil Stop the engine imme- Inform your
low pressure is too low. diately. The engine KUBOTA dealer im-
may have developed mediately.
(red) a fault.
+

15. Overheat The machine is Allow the machine to Clean the radiator
overheated and cool off by idling. Do and check the cool-
must cool off by not switch the engine ant, top up if neces-
idling. off as the coolant sary. Check the hy-
could then boil over. draulic system for
leaks; if necessary,
inform your
KUBOTA dealer.
16. Charging Sys Err The charging sys- Check the V-belt. If the indicator does
tem has devel- When the V-belt is not go out, inform
oped a fault. OK, let the engine run your
(red) until indicator goes KUBOTA dealer im-
+ out. mediately.

17. Fuel sensor error The fuel sensor Press the display se- Inform your
has developed a lector switch to return KUBOTA dealer im-
fault; the fuel to the default display. mediately.
gauge does not ap-
(red) pear in the display.
18. Water tempera- The coolant tem- Press the display se- Inform your
ture sensor sys- perature sensor lector switch to return KUBOTA dealer im-
tem error has developed a to the default display. mediately.
fault; the coolant The functions of the
(red) temperature gauge machine are stable
does not appear in but overheating can-
the display. not be excluded.
19. - - - - -
20. Lever lock system The electrical sys- The engine can be Inform your
error tem in the control started but the ma- KUBOTA dealer im-
lever lock has de- chine cannot be set in mediately.
veloped a fault. motion.
(red)

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 Troubleshooting

No. Display Indicator Problem/Error Preliminary Measure Solution

21. Travel speed sys- The electrical sys- The machine can only Inform your
tem error tem in the travel be set in motion at low KUBOTA dealer im-
speed has devel- speed. mediately.
oped a fault.
(red)
22. - - - - -
23. - - - - -
24. - - - - -
25. Overvoltage This is a warning Switch the engine off If the indicator lights
that a higher volt- immediately and up again after re-
age (from a 24-V check the battery and starting, inform your
battery, for exam- the alternator. Restart KUBOTA dealer im-
(red) ple) is being ap- the engine. mediately.
plied to the electric
circuit, or that there
is a problem with
the alternator.
26. - - - - -
27. System error The 5-V sensor The machine can be Inform your
5-V external supply line has de- started and driven. Do KUBOTA dealer im-
veloped a system not perform any work mediately.
fault. The main with the machine.
(red) functions are not
available.
28. System error The 12-V sensor The machine can be Inform your
12-V external supply line has de- started and driven. Do KUBOTA dealer im-
veloped a system not perform any work mediately.
fault. The main with the machine.
(red) functions are not
available.
29. Start the engine This message indi- Start the engine; the -
cates a step in a indicator goes out.
procedure.
(yellow)

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Maintenance

Maintenance
The Maintenance section includes all care and maintenance tasks to be performed on the excavator.

A careful maintenance of the excavator will guarantee functional safety and longer service life.

Neglect of the servicing will void the warranty and any liability by KUBOTA.

Only use spare parts that are recommended by the manufacturer. Non-approved spare parts of inferior quality or
wrong classification result in an increased risk of accidents. Operators using non-approved spare parts are fully
responsible for any damage arising thereof.

Safety rules for maintenance

 Persons who work with or on the excavator must be provided by the owner with, and where applicable use
suitable personal protective equipment (PPE), for example suitable working clothes, safety shoes, safety hel-
mets, eye protection, ear protection and air-filter masks. The owner/employer bears the main responsibility
for the PPE, which is specified by the safety rules for particular types of activity.

 Maintenance, cleaning and care activities may only be carried out if the excavator is fully shut down. the ex-
cavator must be secured against starting by removal of the key. The bucket must always be lowered to the
ground for servicing.

 The bucket must always be lowered to the ground for servicing.

 When defects are detected during servicing or maintenance, the excavator may only be operated after the
defects are remedied. Repairs may only be carried out by trained personnel.

 When carrying out maintenance and care activities, always make sure that the excavator is secured and sta-
ble.

 When working on the fuel system, smoking, open flames and the operation of other ignition sources are not
allowed. The danger zone has to be clearly marked with signs. A fire extinguisher must be kept at hand in the
danger zone.

 All waste materials must be discarded in accordance with environmental protection regulations.

 Use the maintenance and care materials listed in the "Recommended lubricants" section (page 118).

 When working on the electrical system, disconnect it from the voltage source before starting the work. The
work may only be carried out by technicians with electrical training.

 Always use a ladder or a scaffold if the work cannot be reached by the operator.

 The controls may only be used while the operator is sitting on the operator's seat.

Personnel requirements

 The operator may only carry out cleaning and care activities.

 The servicing may only be performed by trained personnel.

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 Maintenance

Repair work on the machine

Repairs on the machine may only be carried out by trained personnel.

If repairs are carried out on load supporting parts, for example welding on frame parts, the work has to be checked
by a qualified person.

After repairs, the machine should be operated only if it is functioning properly. For this check particular attention
must be paid to the repaired parts and the safety devices.

Maintenance intervals

Maintenance interval display

Already 10 hours before a certain maintenance interval is due, the respective maintenance interval is indicated in
the display.

Elapsed hours of operation

No. Maintenance point Interval
50 100 250 500 600 750 1000
1 Engine oil change   500 h
2 Hydraulic oil change  1000 h
3 Replace the air filter elements  1000 h
4 Replace the drive unit oil    500 h
5 Engine oil filter change   500 h
6 Replace the return filter   500 h
7 Suction filter change  1000 h

The servicing identified with  must be carried out once the specified hours of operation after initial operation have
been reached.

In addition to the indicator in the display, the maintenance indicator

will light up (1).

The maintenance indicator automatically goes out af-

ter approx. 10 seconds and lights up again when the
next maintenance interval has been reached.
The maintenance interval indicator can only be reset
by hand.

If the maintenance interval indicator has to be replaced because of a defect, the meter is set back to "0". Ask your
KUBOTA dealer about this.

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Maintenance

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 Maintenance

Operator maintenance chart

Hours of operation indicator Maintenance

Check item Tasks
intervals
Page
50 100 150 200 250 300 350 400 450 500
Walk-around inspection Checking daily 60
Dust valve Cleaning daily 61
Engine oil level Checking daily 61
Coolant level Checking daily 61
Coolant radiator and oil
Checking daily 62
cooler
V-belt Checking daily 62
Exhaust system leak-
Checking daily 62
age
Hydraulic oil level Checking daily 63
Water separator Checking daily 63
Bucket bolt and
Grease daily 64
bucket linkage bolt
Swing
Lubricate bracket Grease daily 64
the front-
end at- Other
tachments greasing Grease daily 65
points
Fuel level Checking daily 66
Fluid level of the wip-
er/washer system (cab Checking daily 66
version)
Electrical equipment Checking daily 66
Fuel tank Drain           50 h 123
Battery Checking           50 h 124
Swivel gear Grease           50 h 126
Checking           50 h 127
Crawler tension
Setting           50 h 128
Water separator Cleaning           50 h 128
Swivel bearing Grease   200 h 130
Checking   200 h 130
Interior air filter 1.)
Cleaning   200 h 130
Checking   200 h 131
Air filter 1.)
Cleaning   200 h 131
Coolant hoses
and hose clamps
Checking   200 h 132

Fuel lines
and air intake hoses
Checking   200 h 133

Air filter 1.) Change 1000 h 131

1.) If there is a lot of dust, the air filters and the fresh air filters must be cleaned and/or replaced more often.

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Maintenance

Hours of operation indicator Maintenance

Check item Tasks
intervals
Page
550 600 650 700 750 800 850 900 950 1000
Walk-around inspection Checking daily 60
Dust valve Cleaning daily 61
Engine oil level Checking daily 61
Coolant level Checking daily 61
Coolant radiator and oil
Checking daily 62
cooler
V-belt Checking daily 62
Exhaust system leakage Checking daily 62
Hydraulic oil level Checking daily 63
Water separator Checking daily 63
Bucket bolt and
Grease daily 64
bucket linkage bolt
Lubri- Swing bracket Grease daily 64
cate the
front-
end at- Other Grease daily 65
tach- greasing points
ments
Fuel level Checking daily 66
Fluid level of the wip-
er/washer system (cab ver- Checking daily 66
sion)
Electrical equipment Checking daily 66
Fuel tank Drain           50 h 123
Battery Checking           50 h 124
Swivel gear Grease           50 h 126
Checking           50 h 127
Crawler tension
Setting           50 h 128
Water separator Cleaning           50 h 128
Swivel bearing Grease    200 h 130
Checking    200 h 130
Interior air filter 1.)
Cleaning    200 h 130
Checking    200 h 131
Air filter 1.)
Cleaning    200 h 131
Coolant hoses
and hose clamps
Checking    200 h 132

Fuel lines
and air intake hoses
Checking    200 h 133

Air filter 1.) Change  1000 h 131

1.) If there is a lot of dust, the air filters and the fresh air filters must be cleaned and/or replaced more often.

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 Maintenance

Skilled personnel maintenance chart

Carry out for each maintenance of the "Pre-operational services" (page 60).

Hours of operation indicator * Maintenance

Servicing Tasks
intervals
Page
50 100 150 200 250 300 350 400 450 500
V-belt Setting   250 h 134
Pilot valve linkage Grease   250 h 134
Engine oil and oil filter Change  500 h 135
Drive unit oil 3.) Change   500 h 136
Fuel filter Change  500 h 137
Return filter 2.) Change   500 h 138
In-line filter Change 1000 h 141
Hydraulic oil and
Change 1000 h 140
suction filter 2.)
Interior air filter 1.) Change 1000 h 130
Pilot circuit filter Change 1000 h 142
Fuel injection -
Checking Please contact your KUBOTA dealer. 1500 h --
fuel injector pressure
Oil of the idler and track roller Change Please contact your KUBOTA dealer. 2000 h --
Alternator and starter motor Checking Please contact your KUBOTA dealer. 2000 h --
Fuel injection pump Checking Please contact your KUBOTA dealer. 3000 h --
Safety inspection 4.) Checking annually 147
Coolant hoses and hose
Change Please contact your KUBOTA dealer. every 2 years --
clamps
Fuel lines and air intake hos-
Change Please contact your KUBOTA dealer. every 2 years --
es
Coolant Change every 2 years 143
Hydraulic hoses Change Please contact your KUBOTA dealer. every 6 years --

* The servicing identified with  must be carried out once the specified hours of operation after initial operation have
been reached.

1.) If there is a lot of dust, the air filters and the fresh air filters must be cleaned and/or replaced more often.
2.) When using a breaker over 20 %  every 800 h.
When using a breaker over 40 %  every 400 h.
When using a breaker over 60 %  every 300 h.
When using a breaker over 80 %  every 200 h.
3.) Earlier if necessary.
4.) At least annually.

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Maintenance

Hours of operation indicator * Maintenance

Servicing Tasks
intervals
Page
550 600 650 700 750 800 850 900 950 1000
V-belt Setting   250 h 134
Pilot valve linkage Grease   250 h 134
Engine oil and oil filter Change  500 h 135
Drive unit oil 3.) Change  500 h 136
Fuel filter Change  500 h 137
Return filter 2.) Change  500 h 138
In-line filter Change  1000 h 141
Hydraulic oil and
suction filter 2.)
Change  1000 h 140

Interior air filter 1.) Change  1000 h 130

Pilot circuit filter Change  1000 h 142
Fuel injection -
Checking Please contact your KUBOTA dealer. 1500 h --
fuel injector pressure
Oil of the idler and track roll-
Change Please contact your KUBOTA dealer. 2000 h --
er
Alternator and starter motor Checking Please contact your KUBOTA dealer. 2000 h --
Fuel injection pump Checking Please contact your KUBOTA dealer. 3000 h --
Safety inspection 4.) Checking annually 147
Coolant hoses and hose
Change Please contact your KUBOTA dealer. every 2 years --
clamps
Fuel lines and air intake hos-
Change Please contact your KUBOTA dealer. every 2 years --
es
Coolant Change every 2 years 143
Hydraulic hoses Change Please contact your KUBOTA dealer. every 6 years --

* The servicing identified with  must be carried out once the specified hours of operation after initial operation have
been reached.

1.) If there is a lot of dust, the air filters and the fresh air filters must be cleaned and/or replaced more often.
2.) When using a breaker over 20 %  every 800 h.
When using a breaker over 40 %  every 400 h.
When using a breaker over 60 %  every 300 h.
When using a breaker over 80 %  every 200 h.
3.) Earlier if necessary.
4.) At least annually.

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 Maintenance

Operating materials

Recommendation Filled at the factory Note

Ambient temper- Quality stand-
Viscosity Brand Type
ature conditions ard
In winter and/or When diesel fuel with
SAE 10W
at low tempera- a high sulfur content
SAE 20W
tures (between 0.50 % and
1.00 %) is used, the
engine oil and engine
oil filter must be re-
In summer API CF* placed at shorter in-
SAE 30
Engine oil and/or at high API CI-4* tervals.
SAE 40
ambient tem- API CJ-4*
SAE 50
peratures Never use diesel fuel
with a sulfur content
exceeding 1.00 %.

All-weather 15W-40* Shell Rimula R4L* 15W40, API CJ-4

Always use distilled

water to mix with anti-
G048* freeze.
SAE J1034* Hightec Anti- Always follow the rec-
Coolant MB 325.0* ROWE freeze AN ommendations of the
ASTM D3306* (-37 °C)* coolant manufacturer
D4985 for the mixing ratio.
Do not mix with other
coolants.
DIN 51825 Mobilux
NLGI-2* Mobil
KP2K-30* EP2*
Only use during the
Grease first 50 working hours
Antiseize
NLGI-1 WEICON (on all greasing points
Standard
around the swing
block).
In winter and/or
ISO 32* Tellus
at low tempera- Shell
ISO 46* S2M46*
tures
Hydraulic
oil In summer
and/or at high ISO 46
ambient tem- ISO 68
peratures
In winter and/or
SAE 75
at low tempera-
SAE 80
tures
In summer
gear oil and/or at high SAE 90 MIL-L-2105C*
ambient tem- SAE 140
peratures
Spirax
All-weather 80W-90* Shell
MA80W*

118 RH418-8135-3
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Maintenance

Recommendation Filled at the factory Note

Ambient temper- Quality stand-
Viscosity Brand Type
ature conditions ard
The fuel filled at the
factory is not winter
diesel. For preparing
the excavator for use
in winter, fill the fuel
tank with winter die-
EN 590
Diesel sel and allow the en-
ASTM D975
gine to run for a few
minutes.

Never use diesel fuel

with a sulfur content
exceeding 1.00 %.
Refrigerant HFC R134a
* This lubricant is filled while manufacturing the engine.

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 Maintenance

Make the maintenance points accessible

Opening and closing the engine compartment cover

 Insert the key in the lock (1) of the engine compartment cover
(3) and turn it clockwise.
3
 Pull the handle (2) and swing the engine compartment cover
completely to the left.
2

When opening the engine compartment cover, the

coolant expansion reservoir (1) is pivoted out of the
engine compartment by the driver function of the cov-
er bracket (2).

2 1

Ensure that the locking pin (1) is correctly engaged in 1

STOP
the recess of the stop plate (2). If the engine cover is
unexpectedly slammed shut, for example by another
person or by the wind, serious injury could result.
 To close the engine compartment cover, lift (A) the stop plate
(1) until the locking pin is released.

 Close the engine compartment cover and press it into the lock.

Upon closing the engine compartment cover, the cool-

ant expansion reservoir pivots back into the engine
compartment.

 Turn the key anticlockwise to lock the engine compartment

cover.

 Pull out the key.

Make sure that the engine compartment cover is correctly closed.

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Maintenance

Opening/closing the side cover

 Insert the key in the lock (3) of the side cover (1) and turn it 1 2
clockwise.

 Take hold of the side cover on the recessed grip (2) and pivot
it all the way forwards.

Make sure that the catch (1) has snapped into place
STOP
properly. If the engine cover is unexpectedly slammed
shut, for example by another person or by the wind,
serious injury could result.
2
 To close, lift the catch (1) out of the locking mechanism (2) and 1
pivot the side cover to the rear.

 Press the side cover into the lock and remove the key.

Make sure that the lock has properly engaged.

Opening and closing the left service cover

 Insert the key in the lock (1) of the cover (2) and turn it clock- 2
wise.

 To open, raise the cover.

The cover has no catch! The cover falls off upon re-
STOP lease, which can lead to hand injuries during clamping.

 To lock the cover, lower it again and turn the key anticlockwise.

 Pull out the key.

1

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 Maintenance

Opening and closing the right ventilation grille

 Open the engine compartment cover (page 120).

 Unscrew the wing screw (2).

 Swivel the ventilation grille (1) to the right.

 To close the ventilation grille, swivel it to the left.

 Tightly screw in the wing screws.

 Close the engine compartment cover.

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Maintenance

Maintenance work for the operator

Adhere to the instructions for regular servicing to keep the excavator in good condition.

Every 50 hours of operation

Fuel tank - drain

The drain valve (1) for draining the fuel tank is located underneath
the swivel frame, at the rear right.

To perform the following tasks, the dozer must be in

the forward direction of travel and the swivel frame 1
turned to the right by 45°.

 Place a container with a minimum capacity of 50 litres under

the fuel drain plug.

 Close drain valve (1) (A).

 Unscrew the plug (2)

 Open drain valve (B) and drain the water.

 Close the drain valve.

 Install the plug using a new seal.

Dispose of fluid in the container according to the appli-

cable environmental protection regulations.

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 Maintenance

Battery service
The battery can become damaged or may explode if the following instructions are not observed. Reg-
STOP ular maintenance can extend the life cycle of the battery considerably.
- Never charge or use the battery when the battery electrolyte level is below the minimum mark.
- Check the battery regularly.

Regular maintenance can extend the life cycle of the battery considerably.

Battery - check
 Open the side cover (page 121).
1

Be careful when cleaning the positive terminal (1) -

2
risk of short circuit! Do not use metal tools.

 The battery charge must be checked on the charge indicator (2)

according to the operating instructions of the battery manufac-
turer.

Do not open maintenance-free batteries!

3
 Check battery (3) for tight fit, if necessary screw tight.

 Check battery poles for cleanness, if necessary clean and

grease with petroleum jelly (previous figure).

 Close the side cover.

Battery - load

Battery acid is very caustic. Avoid contact with battery acid under all circumstances. If clothing, skin
or eyes have come in contact with battery acid, rinse the affected parts immediately with water. If the
eyes are affected, immediately seek medical attention! Neutralise spilled battery acid immediately.

When servicing a battery, always wear suitable protective gloves and eye protection.

Charge batteries only in sufficiently ventilated rooms. Smoking, uncovered lights or fire are not al-
lowed in these rooms.

Explosive gas is created when charging batteries. Open flames can cause an explosion.

Remove the fill caps when charging batteries that are virtually empty. Leave the fill caps inside (not
empty) batteries that are only charged for maintenance purposes, the fill caps can stay in the batter-
ies.

STOP The battery can only be charged if the starter switch is in the STOP position and the key removed.

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Maintenance

 Make the battery accessible.

 Check the electrolyte level in the battery, adding distilled water if required.

When disconnecting and connecting the battery, always observe the specified order  Risk of short
STOP circuit.

 Remove the negative terminal cover and take off the cable clamp. Put the clamp to the side so that contact
with the negative terminal is excluded.

 Remove the positive terminal cover.

 Connect the battery charger to the battery according to the instructions of the charger manufacturer. Choose
the normal (gentle) charging method.

 Clean the battery after charging and replenish the electrolyte, if necessary.

 Check the acid density with a hydrometer. The acid density should be between 1.24 and 1.28 kg/l. If the acid
density differs considerably among the individual cells of a battery, the battery probably has a defect. Check
the affected battery with a battery tester and contact trained personnel.

Battery - change

When disconnecting and connecting the battery, always observe the specified order  Risk of short
STOP circuit.

 Open the side cover (page 121).

1
 Remove the negative terminal cover and take off the cable
clamp (1). Put the clamp to the side so that contact with the
negative terminal is excluded. 3

 Remove the positive terminal cover and take off the cable
clamp (4). Put the clamp to the side so that contact with the
positive terminal is excluded.

 Remove the battery retainer (3) and lift the battery out of the
swivel frame.

When replacing the battery, always install a battery of 2

the same type with the same power rating and the
same dimensions.

 Before installation, cover the battery terminals and cable clamps with petroleum jelly.

 Install the battery in the swivel frame and fasten it with the battery retainer. Check the battery for tightness 
Do not operate the excavator with a loose battery.

 Connect the positive cable clamp to the positive terminal (+) of the battery, install the positive terminal cover.

 Connect the negative terminal (-) of the battery, install the negative terminal cover.

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 Maintenance

Swivel gear - grease

 Fill grease through the grease nipple (1) with a grease gun.

Grease at each 90° position of the swivel gear. Fill a

total of approx. 50 g of grease (approx. 20 shots with 1
the grease gun). Refer to the "Recommended lubri-
cants" section (page 118).

When moving the swivel frame, make sure no person

STOP or material is in the swivel area. Turn the starter switch
to the STOP position and remove the key before the
next greasing procedure.

 Operate the excavator and swivel the swivel frame by 90° several times. After greasing, swivel the swivel
frame 360° several times to distribute the grease evenly.

Crawler tension - check/adjust

When parking an excavator with rubber crawlers, ensure that the
seam (∞ ) is on top, half way between the two sliders (see figure/1,
"Crawler tension - check", page 127).

 Clean all parts of the running gear, paying particular attention

to stones between the crawler and sprocket or idler. Clean the
area of the crawler tensioning cylinder.

 Swivel the swivel frame 90° to the direction of travel as shown

in the figure.

 Lower the front attachments on the ground and raise the exca-
vator approx. 200 mm off the ground on one side.

Working under the lifted excavator poses a danger!

STOP For your own safety, do not use any hydraulic supports. They can lower due to loss of pressure, tip
over or be lowered by mistake.
- Never work under the lifted excavator.
- Do not work with hydraulic supports.
- Have a guide supervise the procedure.
 Support the excavator with appropriate backing material, observing the vehicle weight.

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Maintenance

Crawler tension - check

If the crawlers are too tight, wear is increased.

If the crawlers are too loose, wear is increased and the crawlers may come off.

 The crawler seam (1) is half way between the idler and sprock-
et.

 Check the crawler sag as shown in the figure.

Crawler sag "A" 10-15 mm

 If the crawler sag is more than 15 mm, adjust the crawler.

 If necessary, tighten or loosen the crawler.

 Start the engine and rotate the lifted crawler briefly.

Caution: The area around the rotating crawler must be free of persons. Turn the starter switch to the
STOP STOP position after turning and remove the key.

 Recheck the crawler tension, readjusting it if necessary.

 Perform the procedures on the second crawler.

Checking the crawler tension (steel)

 Check the crawler sag as shown in the figure.

Crawler sag "A" 75-80 mm

 If the crawler sag is more than 80 mm, adjust the crawler.

 If necessary, tighten or loosen the crawler.

 Start the excavator and rotate the lifted crawler briefly.

Caution: The area around the rotating crawler must be free of persons. Turn the starter switch to the
STOP STOP position after turning and remove the key.

 Recheck the crawler tension, readjusting it if necessary.

 Perform the procedures on the second crawler.

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 Maintenance

Crawler tension - adjust

Tightening the crawlers

1 2
 Remove the crawler tensioner cover (1).

 Position the grease gun on the grease nipple (2).

 Pump the grease gun until the specified crawler tension is ob-
3
tained.

Loosening the crawlers

 Loosen the pressure valve (3) carefully.

Do not unscrew the pressure valve too quickly or completely. Otherwise grease can squirt out at high
STOP pressure from the opening of the clamping cylinder.

 If the grease is emitted from the pressure valve in a controlled way, start the engine and rotate the lifted crawl-
er briefly.

 Screw in the pressure valve and torque to 98-108 Nm.

 Check and adjust the crawler tension, if necessary.

Water separator - clean

Water and impurities in the fuel settle in the water sep-

arator. A red plastic ring (4) in the water separator
floats on the water. If such substances have deposited
or the plastic ring has come up to the mark (5), the wa-
ter separator must be emptied. OFF
OFF

 Open the engine compartment cover (page 120). 1

Place a cleaning cloth under the water separator to 2

prevent fuel from running onto the ground.

 Turn the cock (3) to the OFF position.

 Unscrew retainer (1) while holding on to the cup (2).

 Remove the cup.

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Maintenance

 Empty the cup (5) and clean with clean diesel fuel. 1 2 3

 Check filter (1) for excessive dirt; replace it if necessary.

 Replace the oil ring (4) and lubricate it with diesel fuel.

 Assemble the components 1 to 6 in this exact order.

Do not forget the red plastic ring (2) and the compres-
sion spring (3).

 Tighten retainer (6) manually, do not use tools.

4 5 6
 Set the cock to the ON position.

 Bleed the fuel system (page 98).

 Check the water separator for leaks.

Dispose of cleaning cloths according to the applicable environmental protection regulations.

 Close the engine compartment cover.

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 Maintenance

Every 200 hours of operation

Swivel bearing - grease

 Fill grease through the grease nipple (1) with a grease gun.

Grease at each 90° position of the swivel bearing. Us-

ing the grease gun, apply 5 shots at every position.
Refer to the "Recommended lubricants" section
(page 118).

When moving the swivel frame, make sure no person

STOP or material is in the swivel area. Turn the starter switch
to the STOP position and remove the key before the
1
next greasing procedure.

 Operate the excavator and swivel the swivel frame by 90° several times. After greasing, swivel the swivel
frame 360° several times to distribute the grease evenly.

Interior air filter element - check/clean

If the excavator is operated in a particularly dusty en-

vironment, the interior air filter must be checked more
often. 2
 Unlock and unfold the cover plate (1).

 Carefully remove the interior air filter (2) from the mounting.

Checking
1
 Inspect the interior air filter for contamination and damage. If
there is too much soiling or damage, the fresh air filter must be
replaced (page 142).

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Maintenance

Cleaning

Clean only with filtered air at max. 2 bar pressure.

Always wear eye protection when working with com-

STOP pressed air.

 Clean the filter (1) with compressed air in direction "A", oppo-
site the normal direction of flow.

Take care not to damage the filter when installing it.

When using a damaged filter, dirt will get into the heat-
er assembly and lead to considerable damage there.

 Insert fresh air filter.

 Close the cover.

Air filter element - check/clean

If the excavator is operated in a particularly dusty en- 1 2 3

vironment, the air filter must be checked more often.

 Open the engine compartment cover (page 120). 4

 Open the clips (3) and remove the cover (4).

 Pull the outer filter element (2) out of the air filter case (6) and
check it for dirt.

 Clean the air filter case and cover without removing the inner
filter element (1). Remove the inner filter element only when re-
placing it.
6 5
 Clean the dust valve (5).

 Replace the filter elements if they are damaged or very dirty (page 133).

STOP Do not clean the filter element with fluids. Never operate the engine without the air filter elements.

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 Maintenance

STOP Always wear eye protection when working with compressed air.

 Clean the outer filter element with compressed air (max. 5 bar)
from the inside out without damaging the filter element. Wear
eye protection for this service.

 Insert the outer air filter element and the cover with the TOP
mark up. Then lock the braces.

 Close the engine compartment cover.

Coolant hoses and clamps - check

STOP Only carry out inspections when engine is cold, otherwise there is a risk of burns!

 Open the engine compartment and side cover (page 120).

1 2
 Inspect all coolant hoses (1) on the engine and to the radiator
or to the heater fan (cab version) for condition (cracks, bulges,
hard spots), tightness, and firm seating of the clamps (2). If
necessary, have the hoses replaced by trained personnel.

 Close the engine compartment and side cover.

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Maintenance

Fuel line and intake air hose - check

 Open the engine compartment cover (page 120).
2
 Check all accessible fuel lines (1), air intake hoses (3) and 3
clamps (2) to ensure that they are not damaged and are firmly
seated.

 Repair or replace damaged parts. 1

 Close the engine compartment cover.

2
2 1

Every 1000 hours of operation

Air filter element - change

 Open the engine compartment cover (page 120).
1 2 3
 Open the clips (3) and remove the cover (4).

 Pull the outer filter element (2) out of the air filter case (6). 4

 Clean the air filter case and cover without removing the inner
filter element (1).

 Clean the dust valve (5).

 Insert a new air filter element.

 Close the cover with the TOP mark up. Then lock the braces.
6 5
 Close the engine compartment cover.

Dispose of the old filter element according to the applicable environmental protection regulations.

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 Maintenance

Servicing by skilled personnel

Every 250 hours of operation

V-belt - adjust
 Open the engine compartment cover (page 120).
3
1
 Check the V-belt (2) (page 62). 4
5
The V-belt tension will be set by the V-belt tensioner (1) as follows:

 Loosen the fastening screw (5).

 Loosen the lock nut (4). 2

Turning the hex bolt (3) in clockwise direction tensions the V-belt.
Turning in anti-clockwise direction relaxes the V-belt.

 Adjust the V-belt tension.

 Tighten the lock nut (4).

 Tighten the fastening screw (5).

 After adjusting, check the V-belt (page 62).

 Close the engine compartment cover.

Pilot valve - grease

 Pull up the bellows at the control lever (3).

 Lubricate the linkage (1) underneath the disc (2) with grease.
See "Recommended lubricants" section (page 118).

 Insert the bellows into the console.

 Perform the same service on the second control lever.

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Maintenance

Every 500 hours of operation

Engine oil and engine oil filter - change

To perform the following tasks, the dozer and boom must be positioned in the forward direction of
travel.

The engine oil change must be carried out while the engine is warm.

STOP Caution: The engine oil and the oil filter are very hot  Risk of scalding.

Place an oil pan with a capacity of approx. 15 litres under the engine oil drain. The engine oil should
not be allowed to seep into the soil and it must be discarded like the oil filter in accordance with the
applicable environment protection regulations.

 Open the engine compartment cover (page 120).

Engine oil - drain

 Remove the oil drain plug (1) and let the engine oil drain into
the drain pan.

 Install the oil drain plug using a new seal.

1
Engine oil filter - change

 Place an oil pan under the oil filter (1). Remove the oil filter us-
ing a filter wrench (turn anticlockwise). 1
 Coat the sealing ring of the new oil filter with engine oil.

 Install and tighten the oil filter by hand. Do not use the filter
wrench.

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 Maintenance

Engine oil - fill

Filling capacity (with oil filter): 3.6 l

 Remove the oil filler cap (1) and fill engine oil. See the "Recom-
mended lubricants" section (page 118).

 Screw in the oil filler cap.

 Start the engine (page 70). The engine oil pressure indicator
must go out as soon as the engine has started. If this does not
happen, switch the engine off immediately and contact trained
personnel.

 Let the engine run at idle speed to warm up, then stop it
(page 72). Check the oil level after 5 minutes. 1

 Pull out the oil dipstick (1) and wipe it with a clean cloth.

 Insert the oil dipstick completely and pull it out again. The oil
level should be in the "A" area. If the oil level is too low, add en-

A
gine oil.

When the oil level is too high or too low, the engine
might get damaged during operation.

 When changing the engine oil, fill engine oil up to the MAX
mark.

 Close the engine compartment cover. 1

Drive unit oil - change

Only change the oil when the drive unit is warm to the hand; if not, drive the excavator warm.

 Park the excavator on level ground so that the drain plug (figure below, position 2) is positioned at the bottom.

 Place a catch tray with a minimum capacity of 2 litres under the drain plug.

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Maintenance

 Remove the drain plug (2) and let the oil drain completely. In-
stall the drain plug with a new sealing ring on it.

 Remove the oil filler plug (3) and oil level screw (1).

 Fill oil as specified in the "Recommended lubricants" section

(page 118). The oil level is the lower edge of the thread (1).

Capacities: 0.35 litres

 Refit the oil filler plug and the set screw with a new sealing ring
and tighten it.

 Perform the same service on the second drive unit.

Dispose of cleaning cloths and old oil in accordance with applicable environmental protection regu-
lations.

Fuel filter cartridge - change

 Open the engine compartment cover (page 120).

Place a cleaning cloth under the fuel filter to prevent

fuel from spilling on the ground.

 Turn the cock (1) at the water separator to the OFF position.

 Remove the fuel filter (2).

 Wet the rubber seal of the new filter with fuel.

 Install a new filter and tighten it by hand. 2 1

 Set the cock to the ON position.

 Bleed the fuel system (page 98).

 Check the fuel filter for leaks.

Dispose of cleaning cloths and the old filter element in accordance with applicable environmental pro-
tection regulations.

 Close the engine compartment cover.

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 Maintenance

Return filter - change

1 2
Pay attention to utmost cleanliness when servicing the
hydraulic system.

This service may only be carried out after the hydraulic

STOP oil has cooled down.

 Open the side cover (page 121).

 Unscrew the breather filter (1) from the cap (2).

 Unscrew the cap (2).

 Pull out the filter support (1) with the return filter (2) from the hy-
draulic oil tank.
1
 Loosen the lock nut and unscrew the return filter from the filter
support.
2
Dispose of cleaning cloths and the old filter element in
accordance with applicable environmental protection
regulations.

 Screw a new return filter onto the filter support, tighten the lock
nut.

 Insert the return filter and support assembly into the hydraulic
oil tank over the return pipe.

 Check the condition of the oil ring at the cap; change it if nec-
essary.

 Insert the cap with the guide into the filter support and tighten.
 Check the hydraulic oil level, add oil if necessary.

 Screw the breather filter into the cap tightly by hand.

 Close the side cover.

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Maintenance

Every 1000 hours of operation

Hydraulic oil - fill/change

Pay attention to utmost cleanliness when servicing the hydraulic system.

STOP This service may only be carried out after the hydraulic oil has cooled down.

The suction filter must be changed along with the hydraulic oil.

The hydraulic oil drain plug (1) is located underneath the swivel frame on the right. To perform the
following tasks, the dozer must be in the forward direction of travel and the swivel frame turned to the
right by 45°.

 Operate the boom, arm, bucket and boom swing mechanism

so that all hydraulic cylinders are extended half way.

 Open the side cover (page 121).

Hydraulic oil - drain

 Place a container with a minimum capacity of 50 litres under
the hydraulic oil drain plug.

 Remove the drain plug (1) and drain the hydraulic oil.

 Install the drain plug with a new sealing ring on it.

Dispose of cleaning cloths and old oil in accordance

with applicable environmental protection regulations.

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 Maintenance

Hydraulic oil - fill

Filling quantity with oil change: approx. 22 litres

Total hydraulic system capacity: 37.5 l

 Unscrew the breather filter (1) from the cap (2).

1
 Insert a clean funnel with a strainer into the fill opening (3).

 Add hydraulic oil up to the centre of the sight glass (figure be-
low, position/1). 2

 Screw the breather filter into the cap tightly by hand.

 Start the excavator and operate all control functions.

 Operate the boom, arm, bucket and boom swing mechanism

so that all hydraulic cylinders are extended half way.

 Check the hydraulic oil level, add oil if necessary.

 Close the side cover.

Suction filter - change

Pay attention to utmost cleanliness when servicing the hydraulic system.

STOP This service may only be carried out after the hydraulic oil has cooled down.

The suction filter must be replaced along with the hydraulic oil.

 Drain the hydraulic oil (page 139).

 Remove the return filter from the hydraulic oil tank (page 138).

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Maintenance

 Remove the suction filter (1).

 If necessary, remove any residues with a clean, lint-free cloth.

Dispose of cleaning cloths and the old filter element in

accordance with applicable environmental protection
regulations.

 Install a new suction filter and tighten it by hand. 1

 Install the return filter (page 138).
 Fill hydraulic oil (page 140).

Heating pipes and hoses - check

Carry out the inspection while the engine is cold.

 Open the engine compartment cover (page 120).

 Open the side cover (page 121).

 All pipe and hose lines of the heater must be checked for condition (cracks, bulging, hard spots) and tight fit.
If there are any defects found, consult your KUBOTA dealer. Only trained personnel may work on the heater.

 Close the engine compartment and side cover.

In-line filter - change

Pay attention to utmost cleanliness when servicing the

hydraulic system.

The replacement procedures are explained with the

LH control lever as an example; the RH control lever fil-
ter replacement should be performed in the same
manner.
 Put cleaning cloths in the working area under the control con-
sole.

 Pressure relief of the hydraulic system (page 87).

 Raise the left control console (1).

 Remove the lower trim panels.

 Remove the hydraulic line (white).

 Unscrew the in-line filter (2).

 Screw in a new filter.

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 Maintenance

 Reconnect the hydraulic line.

 Reinstall the trim panels.

 Change the RH control lever in-line filter.

Dispose of cleaning cloths and the old filter element in accordance with applicable environmental pro-
tection regulations.

Interior air filter element - change

 Unlock and unfold the cover plate (1).

 Remove the interior air filter (2) from the mounting. 2

Take care not to damage the filter when installing it.

When using a damaged filter, dirt will get into the heat-
er assembly and lead to considerable damage there.

 Insert a new fresh air filter. 1

 Close the cover.

Dispose of the old filter element according to the appli-

cable environmental protection regulations.

Pilot circuit filter - change

Pay attention to utmost cleanliness when servicing the

hydraulic system.

 Open the engine compartment cover.

 Remove the screws (2) and take off the left side cover (1).

 Put cleaning cloths in the working area under the pilot circuit fil-
ter.

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Maintenance

 Remove the filter cup (4) from the filter head (1).

 Remove the filter element (2) from the filter head.

 Replace the sealing ring (3) with a new one.

 Lubricate the new sealing ring with clean hydraulic oil and in-
sert it carefully so as not to damage the sealing ring.

 Insert a new filter element.

 Screw in the filter cup and tighten it by hand.

 Start the engine. Let the engine run at idle speed to warm up,
then stop it.

 Check the hydraulic oil level, add oil if necessary.

 Install the LH side cover.

 Close the engine compartment cover.

Dispose of cleaning cloths and the old filter element in accordance with applicable environmental pro-
tection regulations.

Every 2 years

Coolant - change

To perform the following tasks, the dozer and boom must be positioned in the forward direction of
travel.

STOP Drain only when engine is cold, otherwise there is a risk of scalding!

Filling capacity Canopy Cab

Radiator 2.4 litres 2.6 litres

Expansion reservoir 0.6 litres 0.6 litres

 Open the engine compartment and side cover (page 120).

 Place a container with a minimum capacity of 5 litres under the coolant drain plug.

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 Maintenance

 Remove the radiator cap (1) by turning it anticlockwise.

1

 Open the central coolant drain plug (1) and drain the coolant
completely.

Purge the cooling system if the coolant is very dirty. To do this,

spray water without additives into the cooling system with a hose 1
through the filler opening until clear water emerges at the outlet.

 Close the central drain.

 Remove the coolant expansion reservoir (1) and drain it, clean-
ing it if necessary. Refit the reservoir.

Dispose of old coolant according to the applicable en-

vironmental protection regulations.

1
 Fill the premixed coolant into the radiator and expansion reser-
voir. The antifreeze content should be -25 °C.

The antifreeze portion of the coolant should not ex-

ceed 50 %.

Do not operate the cooling system with pure water

(even in summer). The antifreeze also contains a cor-
rosion inhibitor.

 Start the engine (page 70) and let it run at idle speed to warm up.

 Stop the engine (page 72).

 Check the coolant level (page 61), adding coolant if necessary.

 Close the engine compartment and side cover.

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Maintenance

Bolted joints - check

The table below contains the torques for nuts and bolts. These may only be tightened with a torque wrench. Miss-
ing torques can be requested from KUBOTA.

Tightening torque for screws

Nm (kgfm)
4 T (4.6) 7 T (8.8) 9 T (9.8-10.9)
7.8~9.3 9.8~11.3 12.3~14.2
M6
(0.8~0.95) (1.0~1.15) (1.25~1.45)
17.7~20.6 23.5~27.5 29.4~34.3
M8
(1.8~2.1) (2.4~2.8) (3.0~3.5)
39.2~45.1 48.1~55.9 60.8~70.6
M 10
(4.0~4.6) (4.9~5.7) (6.2~7.2)
62.8~72.6 77.5~90.2 103.0~117.7
M 12
(6.4~7.4) (7.9~9.2) (10.5~12.0)
107.9~125.5 123.6~147.1 166.7~196.1
M 14
(11.0~12.8) (12.6~15.0) (17.0~20.0)
166.7~191.2 196.1~225.6 259.9~304.0
M 16
(17.0~19.5) (20.0~23.0) (26.5~31.0)
333.4~392.3 367.7~431.5 519.8~568.8
M 20
(34.0~40.0) (37.5~44.0) (53.0~58.0)
Note: Use screws 9 T for canopy assembly, but tighten with torque indicated for screws 7 T.

The maximum torque of the plastic trim bolted connections between the operator's place and the en-
gine compartment may not exceed 21 Nm. When tightening the screws with a torque higher than
21 Nm, the plastic trim helicoil inserts will be loosened or destroyed.

Tightening torque for hose clamps

Size Code # Hydraulic oil Water Air

10-16 69741-7287-0 4.0 Nm 3.0 Nm 2.5 Nm
13-20 69481-1116-0 4.0 Nm 3.0 Nm 2.5 Nm
16-25 69741-7281-0 4.0 Nm 4.5 Nm 2.5 Nm
22-32 69741-7284-0 4.0 Nm 4.5 Nm 2.5 Nm
25-40 69741-7282-0 4.0 Nm 4.5 Nm 2.5 Nm
40-60 69481-1518-0 4.0 Nm 4.5 Nm 2.5 Nm
32-50 69741-7283-0 4.0 Nm 4.5 Nm 2.5 Nm
50-70 69741-7285-0 4.0 Nm 4.5 Nm 2.5 Nm

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 Maintenance

Tightening torque for hydraulic hoses

Wrench size Torque in Nm Hose size Thread

14 15-20 DN 4-1/8" M12x1.5
17 15-20 DN 6-1/4" M14x1.5
19 30-35 DN 8-5/16" M16x1.5
22 40-45 DN 10-3/8" M18x1.5
27 50-55 DN 13-1/2" M22x1.5
Are also valid for adaptor with premounted nut.

Tightening torque for hydraulic pipes

Wrench size Torque in Nm Pipe size Thread

17 30-35 6x1 M12x1.5
17 30-35 8x1 M14x1.5
19 40-45 10x1.5 M16x1.5
22 60-65 12x1.5 M18x1.5
27 75-80 15x1.5 M22x1.5
30 90-100 16x2 M24x1.5
32 110-120 18x2 M26x1.5
36 130-140 22x2 M30x2
41 140-160 25x2.5 M36x2
M22x1.5
27 60-65 15x1.5
for ED-2 only

Tightening torque for hydraulic adapters

Thread Wrench size Torque in Nm Pipe size Thread

1/8" 14 15-20 4x1 M10x1.0
1/8" 17 25-35 6x1 M12x1.5
1/4" 19 34-45 8x1 M14x1.5
1/4" 19-22 40-55 10x1.5 M16x1.5
3/8" 22-24 45-65 12x1.5 M18x1.5
1/2" 27 70-80 15x1.5 M22x1.5
1/2" 27 80-90 16x2 M24x1.5
3/4" 32 100-120 18x2 M26x1.5
1" 36 120-140 22x2 M30x2

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Safety inspection

Safety inspection
All safety inspections are based on the national worker's protection regulations, safety regulations and technical
specifications applicable to the country where the machine is deployed.

The owner (operator) (page 14) should arrange for the safety inspections to be performed at specified intervals
according to national rules and regulations.

Based on their technical training and experience, the qualified personnel should have sufficient knowledge in the
domain of the machine described here and be familiar with the applicable national work safety regulations, acci-
dent prevention regulations and the generally accepted technical rules so that they can assess the safe condition
of the machine.

The qualified person must keep his appraisal and evaluation neutral and must not be influenced by personal, eco-
nomic or operational interests. The inspection is a visual and functional check of all components for condition and
completeness and of the effectiveness of the safety devices.

The performance of the inspection must be documented as an inspection report containing at least the following
information:

 Date and scope of the inspection indicating all pending checks,

 Result of the inspection with a report of the determined faults,

 Assessment in respect to starting or continuing operation,

 Information on necessary follow-up inspections and

 Name, address and signature of the inspector.

The owner/employer (company) is responsible for the observance of the inspection intervals. The acknowledge-
ment and the elimination of the determined faults must be confirmed by the owner/employer in writing, along with
the date, in the inspection report.

The inspection report must be kept on file at least until the next inspection.

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 Taking out of service and storage

Taking out of service and storage

If the excavator is taken out of service for up to six months, the measures before, during and after taking out of
service must be carried out as described below. If the vehicle is to be taken out of service for a period of over six
months, contact the manufacturer for additional measures.

Safety rules for taking out of service and storage

The general safety rules (page 14), the safety rules for operation (page 55) and the safety rules for maintenance
(page 111) apply.

When taking the excavator out of service, secure it against unauthorised use.

Storage conditions

The storage place must have a sufficient bearing capacity for the weight of the excavator.

The storage place must be frost-free, dry and well ventilated.

Measures before taking out of service

 Clean and dry the excavator thoroughly (page 101).

 Check the hydraulic oil level, add hydraulic oil if necessary (page 139).

 Change the engine oil and oil filter (page 135).

 Drive the excavator to the storage place.

 Remove the battery (page 125) and store it in a dry and frost-free room. If necessary, connect it to a trickle
charger.

 Grease the swivel gear (page 126).

 Grease the swivel bearing (page 130).

 Grease all other greasing points (page 65).

 Grease the swing bracket (page 64).

 Grease the bucket bolt and bucket linkage bolt (page 64).

 Check the antifreeze content of the coolant, add coolant if necessary (page 96).

 Grease the hydraulic cylinder piston rods.

Measures during taking out of service

 Charge the battery regularly (page 124).

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Taking out of service and storage

Start-up after taking out of service

 If necessary, clean the excavator thoroughly (page 101).

 Check the hydraulic oil for condensate water. Replace the oil if necessary (page 139).

 Remove the grease from the piston rods of the hydraulic cylinders.

 Install the battery (page 125).

 Check the safety devices for proper operation.

 Carry out the pre-operational services (page 60). If defects are detected during start-up, repair the defects
before proceeding.

 If the safety inspection is due while the vehicle has been taken out of service, the inspection must be per-
formed before start-up.

 Start the engine (page 70). Run the excavator at idle and check all functions.

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 Lifting capacity of the excavator

Lifting capacity of the excavator

Constructive calculation of lifting capacity

 The lifting capacity of the excavator is based on ISO 10567 and does not exceed 75 % of the static tipping
load or 87 % of the hydraulic lifting capacity of the machine.

 The lifting capacity is measured at the front pin part of the arm with the arm fully extended. The arm is fully in
the dump position. The boom cylinder is the operating cylinder.

 The lifting conditions are:

1. Swivel up to 360°, dozer up and The position of the dozer is not relevant to the maxi-
down mum lifting capacity when swivelling up to 360°.
The illustration on the label is representative of both
states: Dozer up and down.

2. Over front end, dozer down

3. Over front end, dozer up

 As well as the lifting conditions, the length of the arm also affects the permitted lifting capacities and the sta-
bility of the machine. Compare the dimensions of the machine arm with the details given in the lifting capacity
tables, in order to use the correct lifting capacity table for your machine.

Dimensions for the arm, see "Arm version" table in the "Dimensions" section (page 36).

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Lifting capacity of the excavator

Lifting attachment

 The machine may not be deployed for lifting operation unless there is a pipe safety valve installed on the boom
cylinder and on the arm cylinder according to EN 474-5. An additional pipe safety valve in accordance with
EN 474-1 must be installed before using the dozer for lifting operation support.

 When the overload warning function is enabled, the machine may be used for lifting operation only. For more
information, see the Accessories section in the KUBOTA Pipe safety valve chapter (page 156).

 The lifting attachment is to be attached to the implement or to other parts of the excavator in such a manner
as to exclude the possibility of the lifting rope accidentally unhooking.

 Attachment to the implement or the equipment must be such as to guarantee the optimum field of vision be-
tween the operator and the guide [the person who fastens the lifting rope to the lifting attachment].

 The lifting attachment is to be positioned so that the lifting rope is not deflected from its vertical direction of
tension by other parts of the machine.

 The lifting attachment must be formed and positioned in such a manner as to exclude the possibility of the
lifting rope accidentally slipping.

 Care must be taken when positioning the lifting attachment that there is no risk of restriction (e.g. becoming
caught on something) during normal operation of the excavator or when working on any particular object.

 Load suspensions (e.g. hooks) may only be welded on by suitably skilled personnel. For this type of work,
please contact your KUBOTA dealer.

 At every point of the implement or the boom, the lifting attachment must withstand a load of two-and-a-half-
times its rated lifting load.

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 Lifting capacity of the excavator

Load suspension device

Assumed is a load suspension device with all the characteristics listed below.

 The system must withstand a load two-and-a-half-times its rated lifting load, irrespective of the point at which
that load is applied.

 The system must be designed in such a way as to practically exclude any objects which have been lifted falling
from the lifting attachment, for example by means of a protective attachment designed for this purpose.

 The system must not allow the lifting attachment to slip from the implement to be lifted.

STOP Do not lift loads which exceed the values indicated in the lifting capacity tables.

Always observe the maximum permissible lifting capacity of the hoisting gear (e.g. load hooks). The
STOP lifting of loads over the maximum permissible lifting capacity is not allowed.

The values given in the tables apply only to level and hard grounds. When working on soft ground,
STOP the machine can tip over easily, as the load is concentrated on one side only and the track or the
dozer can dig into the ground.

The values given in the tables apply only for loads without bucket. If a bucket is used, the weight of
STOP the bucket must be subtracted from the values in the tables. The weight of mounted accessories (e.g.
clamp kit, quick release coupling, etc.) must be subtracted from the lifting capacity.

During lifting operations, the boom may not be swivelled to the left or right. The whole machine could
STOP tilt! In order to avoid inadvertent actuation, lower the locking flap for the boom swing pedal.

Lift point radius

Lift point

Lift point height

Vertical axis

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Lifting capacity of the excavator

Max. lifting load during swivel operation is 360°

U27-4 (canopy)/arm 1300 mm

U27-4 (cab)/arm 1300 mm

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 Lifting capacity of the excavator

Lifting capacity over front end, dozer down, only with pipe safety valve on the dozer cylinder
MODEL U27-4 SPEC. CANOPY VERSION
ARM 1300 mm
kN (t)
LIFT POINT LIFT POINT RADIUS (mm)
HEIGHT Mini- Maxi-
1500 2000 2500 3000 3500 4000
[mm] mum mum
4000

3500
3.8
3000 (0.39)
3.8 4.0
2500 (0.39) (0.41)
4.2 4.1
2000 (0.43) (0.42)
7.3 5.6 4.9 4.4 4.2
1500 (0.74) (0.57) (0.50) (0.45) (0.43)
10.2 7.0 5.6 4.8 4.3 4.2
1000 (1.04) (0.71) (0.57) (0.49) (0.44) (0.43)
11.5 8.0 6.2 5.1 4.4
500 (1.18) (0.82) (0.63) (0.52) (0.45)
12.3 8.5 6.5 5.3
GL 0 (1.25) (0.87) (0.67) (0.54)
8.0 10.0 11.9 8.5 6.5 5.2
-500 (0.82) (1.02) (1.21) (0.87) (0.67) (0.53)
11.8 14.8 10.8 7.9 6.1
-1000 (1.20) (1.51) (1.10) (0.81) (0.62)
16.4 13.1 9.0 6.6 4.7
-1500 (1.68) (1.34) (0.92) (0.68) (0.48)
7.9 5.6
-2000 (0.80) (0.57)

-2500

Lifting capacity over front end, dozer up

MODEL U27-4 SPEC. CANOPY VERSION
ARM 1300 mm
kN (t)
LIFT POINT LIFT POINT RADIUS (mm)
HEIGHT Mini- Maxi-
1500 2000 2500 3000 3500 4000
[mm] mum mum
4000

3500
3.8
3000 (0.39)
3.8 3.5
2500 (0.39) (0.36)
4.2 3.5
2000 (0.43) (0.36)
7.3 5.6 4.4 3.5 2.8
1500 (0.74) (0.57) (0.45) (0.36) (0.29)
8.0 5.6 4.3 3.4 2.8 2.7
1000 (0.82) (0.57) (0.44) (0.35) (0.28) (0.28)
7.8 5.5 4.2 3.3 2.8
500 (0.79) (0.56) (0.43) (0.34) (0.28)
7.7 5.4 4.1 3.3
GL 0 (0.78) (0.55) (0.42) (0.34)
8.0 10.0 7.6 5.3 4.1 3.3
-500 (0.82) (1.02) (0.78) (0.54) (0.42) (0.34)
11.8 13.4 7.7 5.3 4.1
-1000 (1.20) (1.36) (0.78) (0.54) (0.42)
16.4 13.1 7.8 5.4 4.2
-1500 (1.68) (1.34) (0.79) (0.55) (0.42)
7.9 5.6
-2000 (0.80) (0.57)

-2500

Please note the model name and operating weight on the type plate (page 40).

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Lifting capacity of the excavator

Lifting capacity over front end, dozer down, only with pipe safety valve on the dozer cylinder
MODEL U27-4 SPEC. CAB VERSION
ARM 1300 mm
kN (t)
LIFT POINT LIFT POINT RADIUS (mm)
HEIGHT Mini- Maxi-
1500 2000 2500 3000 3500 4000
[mm] mum mum
4000

3500
3.8
3000 (0.39)
3.8 4.0
2500 (0.39) (0.41)
4.2 4.1
2000 (0.43) (0.42)
7.3 5.6 4.9 4.4 4.2
1500 (0.74) (0.57) (0.50) (0.45) (0.43)
10.2 7.0 5.6 4.8 4.3 4.2
1000 (1.04) (0.71) (0.57) (0.49) (0.44) (0.43)
11.5 8.0 6.2 5.1 4.4
500 (1.18) (0.82) (0.63) (0.52) (0.45)
12.3 8.5 6.5 5.3
GL 0 (1.25) (0.87) (0.67) (0.54)
8.0 10.0 11.9 8.5 6.5 5.2
-500 (0.82) (1.02) (1.21) (0.87) (0.67) (0.53)
11.8 14.8 10.8 7.9 6.1
-1000 (1.20) (1.51) (1.10) (0.81) (0.62)
16.4 13.1 9.0 6.6 4.7
-1500 (1.68) (1.34) (0.92) (0.68) (0.48)
7.9 5.6
-2000 (0.80) (0.57)

-2500

Lifting capacity over front end, dozer up

MODEL U27-4 SPEC. CAB VERSION
ARM 1300 mm
kN (t)
LIFT POINT LIFT POINT RADIUS (mm)
HEIGHT Mini- Maxi-
1500 2000 2500 3000 3500 4000
[mm] mum mum
4000

3500
3.8
3000 (0.39)
3.8 3.7
2500 (0.39) (0.38)
4.2 3.7
2000 (0.43) (0.38)
7.3 5.6 4.6 3.7 3.0
1500 (0.74) (0.57) (0.47) (0.37) (0.30)
8.4 5.9 4.5 3.6 2.9 2.9
1000 (0.86) (0.61) (0.46) (0.37) (0.30) (0.29)
8.2 5.8 4.4 3.5 2.9
500 (0.83) (0.59) (0.45) (0.36) (0.30)
8.1 5.7 4.3 3.5
GL 0 (0.82) (0.58) (0.44) (0.36)
8.0 10.0 8.1 5.6 4.3 3.5
-500 (0.82) (1.02) (0.82) (0.58) (0.44) (0.35)
11.8 14.1 8.1 5.7 4.3
-1000 (1.20) (1.44) (0.83) (0.58) (0.44)
16.4 13.1 8.2 5.7 4.4
-1500 (1.68) (1.34) (0.84) (0.58) (0.45)
7.9 5.6
-2000 (0.80) (0.57)

-2500

Please note the model name and operating weight on the type plate (page 40).

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 Accessories

Accessories
The accessories approved for this excavator by the respective countries are described in the following segments.
For further accessories, please contact your KUBOTA dealer or authorized retailer.

Accessories from other manufacturers may only be fitted after prior written approval from KUBOTA.
STOP Also see the "Approved use" section (page 16).

KUBOTA Rotary beacon

An optional rotary beacon (1) is available as an accessory. The bea- 1

con is mounted at the rear end of the canopy and/or cab roof with a
clip-on pedestal (2).

The rotary beacon is switched on and off with the rotary beacon
switch. See the "Right control console" section (page 45) for details.

KUBOTA Pipe safety valve

The pipe safety valve prevents the load from suddenly lowering dur-
ing lifting operation in case a pipe or hose bursts.

A pipe safety valve is located on the hydraulic port of the boom cyl-
inder (2) and arm cylinder (1), respectively.
1 2 3
Additionally, a pipe safety valve can be mounted to the hydraulic
port of the dozer cylinder (3).

Excavators that will be used in the lifting operation, must be

equipped with at least a pipe safety valve on the boom and arm, to-
gether with an overload warning function according to EN 474-5.
An additional pipe safety valve in accordance with EN 474-1 must
be installed before using the dozer for lifting operation support.

To equip the excavator for the lifting operation, contact your

KUBOTA specialist dealer.

The pipe safety valve is adjusted in the factory on the particular ex-
cavator.

Manipulating the pipe safety valve will void the warranty.

Any manipulation can result in substantial personal injuries, even death, and is therefore strictly for-
STOP bidden.

The manipulation and repair of the pipe safety valves is forbidden. They may only be replaced by your
KUBOTA dealer as a kit.

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Accessories

Note on use

 Check the pipe safety valve lead seal before using the excavator. Do not carry out any excavating work if the
lead seal is missing and/or the pipe safety valve is damaged.

 It is not allowed to swing the boom during lifting operation.

KUBOTA Overload warning system

An overload warning function informs the operator immediately if there is an overload. The warning system is con-
trolled by the pressure switch at the pipe safety valve. The load is measured by the pressure at the base of the
cylinder. Any overpressure triggers the warning device.

Excavators that will be used in the lifting operation, must be equipped with at least a pipe safety valve on the boom
and arm, together with an overload warning function according to EN 474-5.
An additional pipe safety valve in accordance with EN 474-1 must be installed before using the dozer for lifting op-
eration support.

To equip the excavator for the lifting operation, contact your KUBOTA specialist dealer.

When changing from rubber crawlers to steel crawlers, or from steel crawlers to rubber crawlers, or when modify-
ing the length of the arm, please contact your KUBOTA dealer.

The overload warning function must be enabled during any lifting operation to prevent personal inju-
STOP ries and damage to equipment.

KUBOTA Quick coupling systems and attachments

The quick coupling system is designed to be mounted with pins at the arm and the bucket linkage.
It is designed to receive KUBOTA bucket accessories only.

The related operating instructions are attached to the excavator's operating instructions.

For further information, please contact your KUBOTA dealer or authorized retailer.

The size, weight and arm bracket of the excavator are important factors in the selection of attach-
ments. These factors must be made known to the attachment manufacturer when ordering attach-
ments, and be observed by the operator when operating the excavator. Various attachments are nev-
ertheless of limited use only.

KUBOTA Bucket accessories

For further bucket accessories, please contact your KUBOTA dealer or authorized retailer.

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