Kubota U35-4 Operator's Manual

OPERATOR'S MANUAL

MODEL

English (Australia)
Code No. RC788-8131-5

U35-4

U

3
5

-

4

1BAAEALAP0090.eps

1BAAEALAP01001BAAEALAP0090

1BAAEALAP0100

PRINTED IN JAPAN

KUBOTA Corporation 2013

©

READ AND SAVE THIS MANUAL

LIST OF ABBREVIATION

Abbreviations Description

API

ASTM

CECE

DIN

EN

OSHA

FRONT

Hi

ISO

JIS

L

L/min

Lo

MIL

OPG

(Top Guard Level I)

rpm

American Petroleum Institute

American Society for Testing and Materials, USA

Committee for European Construction Equipment

German Institute for Standards, Federal Republic of Germany

European Standard

Occupational Safety and Health Administration

"Front" means the front view towards the boom and dozer

High speed

International Standardization Organization

Japanese Industrial Standard

Volume (Liter)

Liter per minute

Low speed

Military Standards

Operator Protective Guards of Top Guard Level I

Revolutions Per Minute

ROPS

SAE

TPSS

AI

Roll-Over Protective Structures

Society of Automotive Engineers, USA

Two Pattern Selection System

Auto Idle

U35-4

AW . A . 11 - 13 . 1 . AK

GENERAL SYMBOLS

The instruments and operation elements have been marked with a series of symbols in order to simplify the operation of
excavator. These symbols are listed below with the respective descriptions.

Safety alert Symbol

Warning lamp ''Fuel level too low''

System lamp

Warning lamp ''Engine Oil pressure''

Warning lamp ''Battery charge''

Warning lamp ''Auto Idle (AI) Lamp''

Indicator lamp ''Glow''

Working light switch

Horn

Wiper/Washer switch

Diesel

Hydraulic fluid

Gear oil

Boom swing (left)

Boom swing (Right)

Dozer raise

Dozer lower

Operation direction of control lever

Operation direction of control lever

Read operator's manual

Engine stop control lamp

Grease

Fast

Slow

Excavator - Overhead movement toward the front

Excavator - Overhead movement toward the rear

Boom up

Boom down

Arm up

Arm crowd

Bucket crowd

Bucket dump

FOREWORD

You are now the proud owner of a KUBOTA Excavator. This excavator is a product
of KUBOTA quality engineering and manufacturing. It is made of fine materials and
under a rigid quality control system. It will give you long, satisfactory service. To
obtain the best use of your excavator, please read this manual carefully. It will help
you become familiar with the operation of the excavator and contains many helpful
hints about excavator maintenance. It is KUBOTA's policy to utilize as quickly as
possible every advance in our research. The immediate use of new techniques in
the manufacture of products may cause some small parts of this manual to be
outdated. KUBOTA distributors and dealers will have the most up-to-date
information. Please do not hesitate to consult with them.

3

This symbol, the industry's ''Safety Alert Symbol'', is used throughout this manual
and on labels on the machine itself to warn of the possibility of personal injury.
Read these instructions carefully. It is essential that you read the instructions and
safety regulations before you attempt to assemble or use this unit.

3
3
3

IMPORTANT :

NOTE :

DANGER :

WARNING :

CAUTION :

Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.

Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.

Indicates a potentially hazardous situation which, if not
avoided, could result in minor or moderate injury.

Indicates that equipment or property damage could result if
instructions are not followed.

Gives helpful information.

SAFETY FIRST

CONTENTS

SAFE OPERATION ............................................................................................ -1

DEALER SERVICE...................................................................................................... 1

TECHNICAL DATA...................................................................................................... 3

DESCRIPTION OF MACHINE PARTS........................................................................ 4

INSTRUMENT PANEL AND CONTROL ELEMENTS................................................. 5

CHECKS BEFORE START ......................................................................................... 7

DAILY CHECKS....................................................................................................... 7

CHECKING THE DEVICES ..................................................................................... 7

Starter Switch ...................................................................................................................7

Display Selector Switch ....................................................................................................8

LCD for Normal Operation................................................................................................8

Warning Lamp ................................................................................................................11

LCD for Warning.............................................................................................................11

Setting the Clock............................................................................................................. 13

Reordering the year/month/day and Changing the AM/PM System to the 24-hour One 14

Log Record .....................................................................................................................15

Periodic Check................................................................................................................ 16

If All the Check Points are not Displayed at a Glance on a Single Screen..................... 16

When the Check-up is Completed..................................................................................18

Horn Switch ....................................................................................................................18

Light Switch ....................................................................................................................18

AUX Port Enable Switch.................................................................................................18

Auto Idle Control Switch .................................................................................................19

Throttle Potentiometer .................................................................................................... 19

Travel Speed Switch.......................................................................................................19

CAB TYPE MACHINES ......................................................................................... 20

Wiper/Washer Switch .....................................................................................................20

Interior Lamp...................................................................................................................20

Opening/Closing of CAB Door........................................................................................21

Opening/Closing of Front CAB Window..........................................................................21

Opening/Closing of Side CAB Window........................................................................... 21

Emergency Hammer....................................................................................................... 21

AIR CONDITIONER ............................................................................................... 22

Air Flow...........................................................................................................................22

Air Control Vent ..............................................................................................................22

Control Panel..................................................................................................................23

Operation........................................................................................................................23

HANDLING THE SAFETY DEVICES..................................................................... 23

Pilot Control Lock Lever.................................................................................................. 23

OPERATION OF THE ENGINE................................................................................. 24

STARTING THE ENGINE ...................................................................................... 24

STARTING THE ENGINE UNDER COLD CONDITIONS...................................... 25

STARTING WITH AN AUXILIARY BATTERY ....................................................... 26

Observe Following Guidelines when Starting with an Auxiliary Battery..........................26

CONTENTS

CHECK POINTS AFTER STARTING THE ENGINE ............................................. 26

STOPPING THE ENGINE...................................................................................... 27

Engine Stop Button.........................................................................................................27

Precautions in case of Overheat.....................................................................................27

EXCAVATOR OPERATION ...................................................................................... 28

RUNNING-IN OF THE NEW EXCAVATOR........................................................... 28

Do not Work with Full Engine Rpm's or Full Loads during the First 50 Working Hours.. 28

Oil Change in the Run-in Stage......................................................................................28

Adjusting the Operator's Seat.........................................................................................28

Seat Belt .........................................................................................................................29

STARTING ............................................................................................................. 29

Pilot Control Lock Lever.................................................................................................. 29

DRIVING ................................................................................................................ 30

Drive Levers (Right,Left).................................................................................................31

TURNS................................................................................................................... 31

Pivot Turn ....................................................................................................................... 31

Spin Turn ........................................................................................................................32

UP AND DOWNHILL DRIVING.............................................................................. 33

PARKING ON A SLOPE ........................................................................................ 33

OPERATION OF THE DOZER .............................................................................. 33

TWO PATTERN SELECTION SYSTEM (TPSS) ................................................... 34

Pattern Change...............................................................................................................34

OPERATION OF THE BOOM................................................................................ 35

OPERATION OF THE ARM................................................................................... 35

OPERATION OF THE BUCKET ............................................................................ 36

UNIT SWING AND BOOM SWING OPERATION.................................................. 36

Unit Swing Operation......................................................................................................36

Boom Swing Operation................................................................................................... 36

AUXILIARY PORT OPERATION ........................................................................... 37

Selecting the Action Modes ............................................................................................ 37

AUX Port Handling Procedure........................................................................................38

Setting the Maximum Flow Volume ................................................................................ 40

HOW TO RELEASE PRESSURE TRAPPED IN THE HYDRAULIC SYSTEM...... 45

1-way or 2-way CIRCUIT SELECTION VALVE OPERATION ............................... 46

AUTO IDLE (AI) OPERATION ............................................................................... 47

IMPORTANT INFORMATION ON EXCAVATOR OPERATION ............................ 48

TRANSPORTING THE EXCAVATOR ON A VEHICLE............................................. 49

LIFTING OF THE EXCAVATOR................................................................................ 51

MAINTENANCE......................................................................................................... 53

MAINTENANCE INTERVALS ................................................................................ 53

OPENING AND CLOSING OF COVERS............................................................... 56

Opening/Closing of the Engine Hood .............................................................................56

Opening/Closing of the Side Cover ................................................................................56

Where to store the Tool ..................................................................................................57

Cup Holder......................................................................................................................57

Where to store the Grease Gun......................................................................................57

Where to keep Operator's Manual..................................................................................57

DAILY CHECKS..................................................................................................... 58

CONTENTS

Checking Coolant Level.................................................................................................. 58

Checking Fuel Level ....................................................................................................... 58

Checking Engine Oil Level..............................................................................................59

Checking Hydraulic Oil Level.......................................................................................... 59

Checking V-belt ..............................................................................................................60

Checking Radiator and Oil Cooler ..................................................................................60

Checking Washer Liquid................................................................................................. 61

Checking and Cleaning Engine and Electrical Wiring.....................................................61

Washing Whole Machine................................................................................................61

Greasing Front Attachments (without Bucket Pin and Boom Swing Fulcrum)................61

Greasing Bucket Pin.......................................................................................................62

Greasing Boom Swing Fulcrum......................................................................................62

REGULAR CHECKS AND MAINTENANCE WORK ................................................. 63

EVERY 50 SERVICE HOURS ............................................................................... 63

Draining the Water from the Fuel Tank...........................................................................63

Draining Water Separator...............................................................................................63

Checking Battery Condition ............................................................................................ 64

Greasing Swing Bearing Teeth.......................................................................................65

EVERY 200 SERVICE HOURS ............................................................................. 66

Adjusting V-belt Tension................................................................................................. 66

Checking Radiator Hoses and Clamps...........................................................................67

Grease Swing Ball Bearing............................................................................................. 67

Inspection and Cleaning Air Filter Element.....................................................................67

Air Filter Maintenance..................................................................................................... 68

Checking Fuel Line and Intake Air Line .......................................................................... 68

AIR CONDITIONER ............................................................................................... 69

Cleaning Air Filter ...........................................................................................................69

Checking Air-Conditioner Condenser .............................................................................69

EVERY 250 SERVICE HOURS ............................................................................. 70

Changing Engine Oil (First Engine Oil Change after 50 Service Hours) ........................70

Replacing Engine Oil Filter Cartridge (First Engine Oil Filter Change after 50 Service

Hours).............................................................................................................................70

EVERY 500 SERVICE HOURS ............................................................................. 71

Drive unit Oil Change(First Oil Change of the 50 hours) ................................................ 71

Replacing Fuel Filter Cartridge.......................................................................................71

Replacing Hydraulic Return Filter Element (First replacement after 250 service hours) 72

Replacing Breather Filter................................................................................................72

Replacing Fan Belt .........................................................................................................72

EVERY 1000 SERVICE HOURS ........................................................................... 72

Replacing the Hydraulic Pilot Filter Element...................................................................72

Hydraulic Oil Change (Including Replacing of the Suction Filter in the Hydraulic Tank) 73

Hydraulic Oil Check with Hydraulic Hammers ................................................................74

EVERY 1000 SERVICE HOURS OR ONCE A YEAR ........................................... 74

Replacing Air Filter Element ........................................................................................... 74

EVERY 1500 SERVICE HOURS ........................................................................... 74

Checking Fuel Injection Nozzle (Injection Pressure) ......................................................74

EVERY 2000 SERVICE HOURS ........................................................................... 74

Changing Front Idler and Track Roller Oil ...................................................................... 74

Checking the Alternator and Starter Motor ..................................................................... 74

EVERY 3000 SERVICE HOURS ........................................................................... 74

Checking Injection Pump................................................................................................74

CONTENTS

ANNUAL SERVICING............................................................................................ 75

Electrical Wiring and Fuses ............................................................................................ 75

Checking the Electrical Circuit ........................................................................................ 75

Checking Air-Conditioner Pipes and Hoses....................................................................75

BIENNIAL SERVICING .......................................................................................... 75

Replacing Air-Conditioner Pipes and Hoses...................................................................75

Replacement of Radiator Hoses and Hose Clamps .......................................................75

Changing Radiator Coolant ............................................................................................75

Replacing Fuel Hoses and Hose Clamps.......................................................................76

Replacing Intake Air line.................................................................................................77

SERVICING AS REQUIRED.................................................................................. 77

Checking Amount of Refrigerant (gas) ...........................................................................77

OTHER ADJUSTMENTS AND REPLACEMENTS.................................................... 78

PURGING OF THE FUEL SYSTEM ...................................................................... 78

ADJUSTMENT OF TRACKS ................................................................................. 78

Special Information when Using Rubber Tracks.............................................................79

CHANGING THE BUCKET .................................................................................... 80

FUSES ................................................................................................................... 80

Replacing Fuses.............................................................................................................80

Fuse Capacities and Circuits..........................................................................................81

Auxiliary Electric .............................................................................................................82

Slow Blow Fuse .............................................................................................................. 82

TROUBLESHOOTING............................................................................................... 83

OPERATION UNDER COLD WEATHER CONDITIONS .......................................... 85

PREPARATION FOR OPERATION IN COLD WEATHER .................................... 85

PROCEDURE AFTER COMPLETING WORK ...................................................... 85

LONG STORAGE ...................................................................................................... 86

RECOMMENDED OILS............................................................................................. 88

APPENDICES............................................................................................................ 90

MAIN DIMENSIONS .............................................................................................. 90

LIFTING CAPACITY .................................................................................................. 91

LIST OF SCREENS................................................................................................... 94

LIST OF NORMAL SCREENS............................................................................... 94

NAVIGATION LIST OF SCREENS ........................................................................ 95

SAFE OPERATION

-1SAFE OPERATION

Careful operation is your best insurance against an
accident.

Read and understand this manual carefully, before
operating the excavator.

Every user, however experienced, should carefully read
and understand this manual and those of the attachments
and accessories before operating the excavator. The
owner is obliged to inform all operators of these
instructions in detail.
Keep this manual in the storage location. (See "Where to
keep Operator's Manual" in "MAINTENANCE" section.)

1. BEFORE OPERATION

1. Know your equipment and its limitations. Read and
understand this entire manual before attempting to
start and operate the excavator.

2. Pay special attention to and obey the danger, warning
and caution labels on the machine.

3. For your safety, a ROPS/OPG (Top Guard Level I)
with a seat belt is installed by KUBOTA.

A ROPS: Roll-Over Protective Structure
A OPG (Top Guard Level I): Operator Protective

Guards of Top Guard Level I
OPG (Top Guard Level I) in accordance with
ISO10262 is equivalent in definition to FOPS (Falling
Object Protective Structure).
Always use the seat belt when the machine is
equipped with a ROPS/OPG (Top Guard Level I) as
this combination will reduce the risk of serious injury or
death, should the excavator be upset or falling objects
occur.
Do not modify any structural members of the ROPS/
OPG (Top Guard Level I) by welding, drilling, bending,
grinding or cutting, as this may weaken the structure.
If any component is damaged, replace it. Do not
attempt repairs. If the ROPS/OPG (Top Guard Level I)
is loosened or removed for any reason, make sure all
parts are reinstalled correctly. Tighten mounting bolts
to proper torque.

4. ROPS meets requirements of ISO 3471.
OPG (Top Guard Level I) meets requirements of
OSHA 1926 1003/ISO 10262.

5. The seat belt must be inspected regularly and
replaced if frayed or damaged.

(1) Seat belt

6. Always sit in the operator's seat when starting engine
or operating levers or controls.

7. Study control lever pattern A and pattern B. Then
choose the one which is most familiar.
Familiarize yourself with the pattern selected by
operating the unit slowly and at low engine speed.

(1) Pattern selector lever
(Two Pattern Selection System:TPSS)

8. Do not operate the excavator while under the influence
of alcohol, medication, controlled substances or while
fatigued.

(A) "Pattern A"
(B) "Pattern B"

SAFE OPERATION-2

9. Check the surroundings carefully before using the
excavator or when attachments are being attached.

A Pay attention to the overhead clearance with electric

wires.

A Check for pipes and buried cables before digging. Use

your local utility service to check for such items (if
available).

A Check for hidden holes, obstacles, soft underground,

and overhangs.

11.Do not wear baggy, torn or oversized clothing when
working with the excavator as such clothing can get
caught in rotating parts or control elements which can
cause accidents or injuries. Wear adequate safety
clothing, e.g. safety helmet, safety shoes, eye
protection, ear protection, working gloves, etc., as
necessary and as prescribed by law or statutes.

(1) Helmet
(2) Clothing fit for work
(3) Tight seams
(4) Good grip footwear
(5) Well fitting cuffs
(6) Working gloves

(7) Soft hat
(8) Towel
(9) Baggy trousers
(10) Loose cuffs of the shirt
(11) Baggy shirt
(12) Sandals or open-toed shoes

A Do not allow any persons within the working range of

the excavator during operation.

10.Do not allow anyone to use the excavator until they
have been advised of the work to be performed and
they have indicated that they have read and
understood the operator's manual.

12.Do not allow passengers to ride on any part of the
excavator at any time. The operator must remain in the
excavator seat during operation.

13.Check levers, pedals and all mechanical parts for
correct adjustment and wear. Replace worn or
damaged parts immediately. Check nuts and bolts
regularly for correct torque.

14.Keep your excavator clean. Heavy soiling, grease,
dust and grass can cause fires, accidents or injuries.

15.Use only KUBOTA authorized attachments.

16.Before starting the excavator, be absolutely sure that
the excavator has been filled with fuel, lubricated,
greased and undergone all necessary maintenance.

17.Do not modify the excavator, as such could lead to
unforeseen safety problems.

18.Do not operate a hydraulic hammer on anything that is
above the operator's seat level as objects may fall into
the operator station.

19.Make sure attachments, particularly those utilizing
quick attach systems, are securely mounted.

20.Install protective guards on the excavator when
working in areas where objects may fall or be thrown.
The top guard and front guard are available for this
machine. Consult your KUBOTA dealer for details.

2. OPERATING THE EXCAVATOR

Operator safety is a priority. Safe operation, specifically
with respect to overturning hazards, entails understanding
the equipment and environmental conditions at the time of
use. Some prohibited uses which can affect overturning
hazards include traveling and turning with implements
and loads carried too high etc. This manual sets forth
some of the obvious risks, but the list is not, and cannot
be, exhaustive. It is the operator's responsibility to be alert
for any equipment or environmental condition that could
compromise safe operation.

C Starting

1. Mount and dismount the machine safely. Always face
the machine. Always use handrails and available
steps and keep yourself well balanced. Do not grab or
hold any of the control levers and switches. Do not
jump on or off the machine, whether stationary or in
motion.

2. Start and control the excavator only from the
operator's seat. The driver should not lean out of his
seat when the engine is running.

3. Before starting the engine, make sure that the lock
levers are in the "LOCKED" position and all control
levers and pedals are in their neutral positions and the
seat belt is fastened correctly.
Before starting the engine, make sure that the control
levers, travel lever, pedals and other control elements
are not stuck and can be moved smoothly.
If stuck, for example, a lever may fail to return, possibly
putting you in danger.
If anything wrong is found, immediately pinpoint the
cause and correct it.

4. Before operating the excavator, make sure that the
dozer blade is in front of you. If the levers are activated
with the dozer blade at the rear, the tracks will move in
the opposite direction of the drive levers.

-3SAFE OPERATION

5. Before operating the control lever, make sure that the
lamp under the auto idle control switch turns "ON" and
"OFF".

C Working

1. Do not operate or idle engine in a non-ventilated area.
Carbon monoxide gas is colorless, odorless, and
deadly. If you experience the initial symptoms of low to
moderate co poisoning, which include the following,
stop operation, seek medical attention and contact
your local dealer. These symptoms are: headache,
fatigue, shortness of breath, nausea, or dizziness.

2. Keep all safety equipment and covers in place.
Replace damaged or missing safety devices.

3. When operating, keep hands and body inside of the
ROPS / OPG (Top Guard Level I) protective envelope.
Do not touch or depress the control levers or the
pedals from outside the cab while the engine is
running.

4. Take precautions against tipping over. Stay away from
steep slopes and embankments. Do not swing the
bucket downhill. Lower the dozer blade when digging.
Keep the bucket as low as possible while driving uphill.
Turn slowly on slopes (at reduced speed). Do not
place the excavator near the edges of trenches and
banks, as the earth can give way due to the weight of
the excavator.
Never cross an incline horizontally or at an angle,
which can cause the machine to rollover. Approach
inclines vertically to avoid loss of control.
Avoid performing any work with the machine when it is
on an incline, which could cause it to become
unbalanced and rollover. Always take care when
moving the machine on an incline.

5. Watch where you are going at all times.
Watch for and avoid obstacles. Remain alert for trees,
wires and other obstructions.

6. Do not change direction on steep slopes, or the
excavator could tip over.
Before changing direction, beware of people in the
work area.

SAFE OPERATION-4

7. When the working light and CAB light alone do not
provide sufficient visibility, prepare additional
stationary artificial lighting and observe safety rules for
night work.

8. When towing the excavator or pulling a load, the load
must be less than the strength of the towing line
attached to excavator.

Max. drawbar pull at
coupling hook

Max. vertical load at
coupling hook

72 kN (7340 kgf)

40 kN (4080 kgf)

5. Never allow children to operate the machine even
under adult supervision.

6. Never allow children to play on the machine or on the
attachments.

7. Use extra caution when backing up. Look behind and
down to make sure the area clear before moving.

3. AFTER OPERATION

Before leaving the machine,
A Park the excavator on a firm, flat and level surface. If

this is not possible, park across the slope.

A Lower the attachments and the dozer blade to the

ground.

A Stop the engine.
A Release pressure in the hydraulic system.
A Lock all control levers.
A Remove the key.
A Lock the cab door (if equipped)

(1) Tow line

9. The towing eye should not be used for tie down or
lifting of the machine.

10.When the excavator is parked or left unattended on a
slope, be sure to put the bucket on the ground and
place all control levers in neutral position, then brace
the tracks with chocks.
A When working in groups, always let the others

know what you are going to do before you do it.
Keep others away from the machine working area.
Be sure to lock the boom swing pedal when the
boom swing function is not used.

11.For details of operating the excavator, see the
"EXCAVATOR OPERATION" section.

C Safety for children

Tragedy can occur if the operator is not alert to the
presence of children. Children generally are attracted to
machines and the work they do.

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

2. Keep children out of the work area and under the
watchful eye of another responsible adult.

3. Be alert and shut your machine down if children enter
the work area.

4. Never carry children on your machine. There is not a
safe place for them to ride. They may fall off and be run
over or interfere with your control of the machine.

(1) Pilot control lock lever (A) "UNLOCK"

(B) "LOCKED"

-5SAFE OPERATION

4. SAFE LOADING AND TRANSPORT OF
THE EXCAVATOR

1. Observe all regulations concerning the transport of
excavators on public roads.

2. Use adequately long and robust ramps when loading
on the machine. (for details see "TRANSPORTING
THE EXCAVATOR ON A VEHICLE")

3. Do not change the running direction and to avoid
tipping over, do not try to swing the attachment
crosswise to the loading ramps.

4. Lower the attachment on the loading bed and release
the pressure from the hydraulic system. Stop the
engine and remove the key.
After loading the excavator on the truck, block the
tracks with blocks and tie down the excavator at the
appropriate locations.

(1) Chain
(2) Block

5. Avoid abrupt braking of the vehicle with the excavator
loaded. Sudden braking causes the excavator to move
and may cause a serious accident.

6. Do not use the hooks on the roof of CAB for lifting the
excavator.

5. MAINTENANCE

Before doing maintenance work on the excavator, place
the machine on a firm, flat and level surface, lower the
attachments to the ground, stop the engine, release
pressure trapped in the hydraulic system, lock all control
levers and remove the key. When dismantling hydraulic
parts, make sure that the hydraulic oil has cooled down
sufficiently to avoid burns.
Start maintenance work carefully, e.g. loosen plug slowly
so that oil will not squirt out.

1. Before doing work on the engine, the exhaust system,
the radiator and the hydraulics, let the excavator cool
down sufficiently.

2. Always turn off the engine when filling the fuel tank.
Avoid spilling and over-filling of fuel.

3. Smoking is prohibited while refueling or handling the
battery. Keep sparks and fire away from the fuel tank
and battery. Flammable gases escape from the
battery, especially during charging.

4. Do not use or charge a refillable type battery if the fluid
level is below the LOWER (lower limit level) mark.
Otherwise, the battery component parts may
prematurely deteriorate, which may shorten the
battery's service life or cause an explosion. Check the
fluid level regularly and add distilled water as required
so that the fluid level is between the UPPER and
LOWER levels.

5. Read and follow the directions "STARTING WITH AN
AUXILIARY BATTERY" in "OPERATION OF THE
ENGINE", when starting with an auxiliary battery.

6. Keep a first-aid box and a fire extinguisher at hand at
all times.

7. Do not open the radiator cap before the radiator has
cooled down sufficiently.
First loosen the cap to the first stop and allow the
system enough time to release the remaining
pressure. Then loosen the cap completely.

8. To avoid short-circuiting the battery, always remove
the ground cable first and attach the positive cable
first.

SAFE OPERATION-6

9. Oil under high pressure can penetrate the skin and
may be harmful to your health if not treated
immediately.

10.Leaking hydraulic fluid has enough pressure to
penetrate the skin and cause serious injuries.
Leakages from pin holes can be totally invisible. Do
not use hands for checking for leaks. Always use a
piece of wood or cardboard. It is strongly
recommended that you use a face mask or eye
protection.
Should injuries occur with leaking hydraulic fluid,
contact a doctor immediately. This fluid can cause
gangrene or serious allergic reactions.

11.To avoid environmental damage from acid and heavy
metals, dispose of the battery appropriately.

12.Observe all laws and regulations concerning the
disposal of used oil, coolants, solvents, hydraulic
fluids, battery acids and batteries.

13.To avoid fire, do not heat the hydraulic components
(tanks, pipes, hoses, cylinders) before they have been
drained and washed.

14.Use eye protection or a face mask to protect the eyes
and respiratory system against dust and other foreign
particles.

15.Securely support excavator with stands or suitable
blocking before working underneath. For your safety,
do not work under any hydraulically supported
devices. They can settle, suddenly leak down, or be
accidentally lowered.

16.Do not dismantle the spring of the track tensioner. If
dismantling is necessary, contact your KUBOTA
dealer where the machine was purchased, or
competent service shop. The assembly must be done
according to the KUBOTA work shop manual (W.S.M.)
for the product involved.

17.When lifting the machine itself with an attachment,
place a safety block or safety post to prevent the
machine from rolling over. Keep the pilot control lock
lever in the "LOCKED" position.

18.Inspect ROPS / OPG (Top Guard Level I) for damage
and if damage is found contact your KUBOTA dealer
for repair.

19.KUBOTA does not use asbestos containing
components and recommends against the use of such
components.
Components containing asbestos should be handled
in accordance with applicable regulations and industry
practice.

20.Fire prevention
Excavator and some attachments have components
that are at high temperatures under normal operating
conditions. The primary source of high temperatures is
the engine and exhaust system. The electrical system,
if damaged or incorrectly maintained, can be a source
of arcing or sparks.
The following fire prevention guidelines will help to
keep your equipment up and running efficiently and
keep the risk of fire to a minimum.

A Blow off all accumulated debris near hot engine

exhaust components such as turbocharger and
exhaust manifold as well as exhaust pipes and muffler
more frequently when working in severe conditions.

A Clean out all accumulated flammable debris such as

leaves, straw, pine needles, branches, bark, small
wood chips and any other combustible materials from
inside the machine belly pans or lower unit structures
as well as from area in proximity to the engine.

A Inspect all fuel lines and hydraulic hoses for wear or for

deterioration. Replace them immediately if they begin
to leak.

A Examine electrical wiring and connectors frequently

for damage. Repair any wires that are loose or frayed
before operating the machine. Clean all electrical
connections and tighten all electrical connections as
necessary.

A Inspect the exhaust system daily for any signs of

leakage. Check for broken pipes and muffler and also
for loose or missing bolts, nuts and clamps. If any
exhaust leaks or fractured parts are found, repairs
must be completed prior to operation.

A Always keep a multipurpose fire extinguisher on or

near the machine. Be familiar with the operation of the
fire extinguisher.

-7SAFE OPERATION

SAFE OPERATION-8

6. DANGER, WARNING AND CAUTION LABELS

-9SAFE OPERATION

SAFE OPERATION-10

-11SAFE OPERATION

SAFE OPERATION-12

-13SAFE OPERATION

SAFE OPERATION-14

7. CARE OF DANGER, WARNING AND CAUTION LABELS

1. Keep danger, warning and caution labels clean and free from obstructing material.

2. Clean danger, warning and caution labels with soap and water, and dry with a soft cloth.

3. Replace damaged or missing danger, warning and caution labels with new labels from your KUBOTA dealer.

4. If a component with danger, warning and caution label(s) affixed is replaced with new part, make sure new label(s) is
(are) attached in the same location(s) as the replaced component.

5. Mount new danger, warning and caution labels by applying on a clean dry surface and pressing any bubbles to outside
edge.

DEALER SERVICE

Your KUBOTA dealer is always ready to help so that your
excavator offers the best performance. After having
carefully read these instructions, you will realize that
much of the routine maintenance can be done by yourself.
For service, contact the KUBOTA Dealer shop from which
you purchased your product, or your local KUBOTA
dealer. When ordering spare parts from your KUBOTA
dealer, always mention the serial number of the excavator
and the engine.
Note these numbers right away in the supplied lines.

Model Serial No.

Excavator

Engine

Dealer's name
(To be filled in through the owner)

1DEALER SERVICE

(1) Serial No.

Date of purchase

C Warranty policy

This product is warranted under the KUBOTA Limited
Express Warranty, a copy of which may be obtained from
your selling dealer. No warranty shall, however, apply if
the product has not been handled according to the
instruction given in the Operator's Manual even it is within
the warranty period.
The Product(s) described in this Operator’s Manual are
designed and manufactured only for the country in which
they are initially wholesaled by KUBOTA or one of its
affiliated companies. Neither KUBOTA Corporation nor its
affiliated companies provide warranty for any Product
which is re-sold or retailed in any country other than the
country for which the Product(s) were designed or
manufactured.

C Scrapping the product and its procedure

To put the product out of service, correctly follow the local
rules and regulations of the country or territory where you
reside. If you have questions, consult your local KUBOTA
Dealer.

DEALER SERVICE2

(1) Engine serial No.

TECHNICAL DATA

KUBOTA EXCAVATOR

Model name U35-4

Type Canopy CAB

Operating weight (including operator's) kg 3687 3833

Type Water cooled 4 cycle diesel engine with 3 cylinder

Model name D1703-M-DI-E4-US1 D1703-M-DI-E4-US2

3TECHNICAL DATA

Engine

Performance

Dozer

Boom swing angle

Pressure
connection
for
attachments

Total displacement cc 1647

Engine power SAE gross kW (HP) 18.5 (25)

Rated speed rpm 2200

Low idle speed rpm 1300 ~ 1350

Unit swing speed rpm 8.5

Travel speed

Ground pressure
(With operator)

Climbing angle % (deg) *58 (30)

Angle in case of
crossing slope

Width x Height mm 1700 x 341

Max swing
angle

Max.displacement
(Theoretical)

Max. pressure

Fast km/h (mph) 4.6 (2.9)

Slow km/h (mph) 3.0 (1.9)

kPa

(kgf/ )

% (deg) *27 (15)

Left deg ---

Right deg ---

Left rad (deg) 1.22 (70)

Right rad (deg) 0.83 (48)

L/min 60.5 (AUX1 port)

MPa

(kgf/ )

33.7

(0.34)

17.2

(175)

35.1

(0.36)

Fuel tank capacity L 45.1

A Above dimensions are based on the machine with rubber trucks.
A Specifications subject to change without notice.
D With unloaded digging bucket. (Q/C BUCKET)
D Firm compacted soil.
D Operators must exercise extra caution and follow instructions in the operator's manual.
D Worse condition or heavier attachment to the above will decrease climbing angle.

4 DESCRIPTION OF MACHINE PARTS

DESCRIPTION OF MACHINE PARTS

DEPICTED CONTENTS
(1) Bucket cylinder
(2) Arm
(3) Bucket link 2 and 3
(4) Bucket link 1
(5) Bucket

(6) Swing bracket
(7) Arm cylinder
(8) Canopy
(9) Seat
(10) Swing frame

(11) Boom cylinder
(12) Dozer cylinder
(13) Dozer blade
(14) Boom
(15) Cab

(16) Drive sprocket
(17) Track roller
(18) Front idler

5INSTRUMENT PANEL AND CONTROL ELEMENTS

INSTRUMENT PANEL AND CONTROL ELEMENTS

B Instrument Panel, Switch

(1) LCD
(2) Horn switch

(9) User setting switch (Switch 1)
(10) - (Switch 2)
(11) AUX port enable switch (Switch 3)
(12) Information switch (Switch 4)
(13) Display selector switch (Switch 5)

(3) Travel speed switch
(4) Starter switch

(5) Throttle potentiometer
(6) Light switch

Starter switch............................................................. 7

Display selector switch............................................... 8

LCD........................................................................... 8

Fuel gauge
Coolant temperature gauge
Hour meter
Engine tachometer
Glow indicator

Warning lamp............................................................. 11

Information switch...................................................... 11

User setting switch..................................................... 13

Horn switch................................................................ 18

Light switch................................................................ 18

AUX port enable switch.............................................. 18

Auto idle control switch............................................... 19

Throttle potentiometer................................................ 19

Travel speed switch................................................... 19

(7) Auto idle control switch
(8) One way hold switch

Ref. page

6 INSTRUMENT PANEL AND CONTROL ELEMENTS

B Control Pedals and Levers

(1) Drive lever (left)
(2) Attachment control lever (left)

(3) Boom swing pedal
(4) Drive lever (right)

(5) Attachment control lever (right)
(6) Dozer control lever

(7) Drive pedal (left)
(8) Drive pedal (right)

Ref. page

Drive lever (left) ............................................... 31

Attachment control lever (left) ......................... 35, 36,36, 35

Boom swing pedal ........................................... 36

Drive lever (right) ............................................. 31

Attachment control lever (right) ....................... 35, 36,36, 35

Dozer control lever .......................................... 33

CHECKS BEFORE START

7CHECKS BEFORE START

DAILY CHECKS

In order to avoid damage, it is important to check the
condition of the excavator before starting.

To avoid personal injury or death:
A Do maintenance work on the excavator only on

level ground with the engine off and the pilot
control lock lever in the "LOCKED" position.

Checks

Go around the excavator and check for visual damage
and wear.
Check coolant level. (See "DAILY CHECKS" in
"MAINTENANCE" section.)
Check fuel level.
Check engine oil level.
Check hydraulic fluid level.
Check air filter for clogging.
Check all grease points.
Check all control lamps, indicators, tachometer and hour
meter.
Confirm all controls move freely and do not stick.
Check the light system.
Check the seat belt and the ROPS / OPG (Top Guard
Level I) safety device.
Check the condition of the safety and warning labels.
(See "DANGER, WARNING AND CAUTION LABELS" in
"SAFE OPERATION" section.)
Inspect ROPS / OPG (Top Guard Level I) for damage and
if damage is found, contact your KUBOTA dealer for
repair.

CHECKING THE DEVICES

BStarter Switch

A [STOP]

The key can be inserted at the "STOP" position.

A [RUN]

Turn the key one click from the "STOP" position to the
"RUN" position. All the circuitry gets energized to start
preheating. The glow indicator is displayed.
To check for any lamp breakage, however, the lamp
lights up and stays on for about 1 second.

A [START]

Move the pilot control lock lever to the "LOCKED"
position. Turn the key from the "RUN" position another
click to the "START" position. The starter motor is then
activated to get the engine started.
Release your hand from the key, and the key returns
itself to the "RUN" position. In other words, once the
engine has started, be sure to free the key.

(1) Starter switch (A) STOP

(B) RUN
(C) START

A If the key is repositioned from "RUN" to "STOP" but not

pulled out, the message "pull out key" appears
onscreen.

A With the key off and pulled out, nothing appears

onscreen.

[Status with the key off but not pulled out]

CHECKS BEFORE START8

BDisplay Selector Switch

Press the display selector switch while the engine is
running. The LCD meter display will change from one
indication mode to the other.
Change the two-mode display according to your jobs.

(1) Display selector switch

C AUX port in use

BLCD for Normal Operation

C Fuel gauge

To avoid personal injury or death:

A Before adding fuel, be sure to stop the engine.
A Be sure to keep open flame away from the

machine. Otherwise a fire may result.

With the starter key at the "RUN" position, the fuel
remaining in the fuel tank is indicated in the block.

(1) Display selector switch

A Even with the starter key not yet inserted, press the

electronic meter's user setting switch or the display
selector switch, and the LCD shows the hour meter,
fuel gauge, water temperature gauge and clock for 10
seconds.

(1) Fuel gauge (A) "E"

If the fuel runs short, open the cap and refuel the tank.

(1) Fuel cap

A If the fuel gauge indicator is near the "E" or the "Feed

fuel" message appears, add fuel as soon as possible.

If the indicator is near "E" and the machine is operated
on a slope, the engine may run out of fuel.

A To open the fuel cap, keep the key inserted.

9CHECKS BEFORE START

C Fuel supply

The following functions are helpful when adding the fuel.
The fueling progress can be monitored by a buzzer sound.

Procedure

1. Press the user setting switch(switch 1) or the display
selector switch(switch 5) on the meter with the key
OFF. (Keep the key at OFF.)

2. Add fuel.

3. The buzzer sound interval changes according to the
amount fuel added. As the fuel amount becomes close
to full, the buzzer sound changes to continuous
beeping.

C Coolant Temperature Gauge

To avoid personal injury or death:
A Do not open the radiator cap during or just after

operation. Hot coolant may gush out and scald
you. Wait for the coolant to cool down before
opening the cap.

With the starter key at the "RUN" position, the coolant
temperature is indicated.

(1) Coolant temperature gauge

A If the fuel is poured too fast, the buzzer may not sound

according to the fueling process.

A The moment when the fuel tank is nearly full, the

buzzer starts beeping.

A Look into the fuel tank when pouring the fuel. Listen to

the buzzer sound for a rough estimate of the fill-up
progress.

If the coolant temperature indicator is near "H", take the
steps below.
Depending on the coolant temperature, the warning
message "Water temp is rising" or "Overheat Engine
to idle for cooling" appears. In either case too, follow the
same procedure below.

1. Discontinue the job.

2. Reduce engine rpm's to idle and keep it at idle for 5
minutes.

3. Stop the engine and check the following points (1)-(4).
(1) Low coolant level or leak
(2) Fan belt tension
(3) Mud or dust deposits on radiator

(4) Hydraulic oil leak

CHECKS BEFORE START10

C Overheat warning

1. If the coolant temperature becomes too high, the
message "Water temp is Rising" appears onscreen
for a certain period of time. The LCD then gets back to
normal, but the coolant temperature sensor marker
" " starts blinking at 1-second intervals.

C Hour-meter

Indicates the total operating hours of the machine.

How the indicator works
A The meter advances one hour after an hour of

operation regardless of the engine rpm.

(1) Hour-meter

C Engine tachometer

(1) Coolant temperature sensor marker

A If this message is displayed, interrupt the work and

lower the engine rpm, which will reduce the coolant
temperature.

2. The overheat warning appears onscreen. Also the
following message shows up on the LCD, and the
engine automatically starts idling. (Acceleration is not
operative.)

If the above message appears, take corrective measures,
referring to the "Precautions in case of Overheat"
section.

A When the coolant temperature has dropped,

acceleration can be automatically enabled.

Indicates the current rpm of the engine.

(1) Engine tachometer

C Glow indicator

The indicator is displayed when the starter key is turned
to the "RUN" position but the engine requires preheating.
Wait until the indicator goes out, and then start the engine.

(1) Glow indicator

BWarning Lamp

The warning lamp is used to indicate broken wire, short­circuit, fuel shortage and other problems.
The warning lamp starts flashing in red if any problem
occurs. If the system senses a in warning signal, the
warning lamp starts flashing in yellow.

A If the warning illuminates, do not just look at the meter;

carry out the appropriate inspection and correction
accordingly.
(See "REGULAR CHECKS AND MAINTENANCE
WORK" section)

11CHECKS BEFORE START

BLCD for Warning

C Remaining fuel warning

When the fuel level is very low, the lamp (yellow) starts
flashing and the following message appears in the
display.

A After a short period of time, the display comes back to

normal.

A After a short period of time, the message shows up

again.

A Even while in the normal display mode, the warning

lamp keeps on blinking.

A To see what warning is being given out, press the

display selector switch. The current warning can then
be identified.

C Battery charge warning

If the starter key is turned to the "RUN" position without
starting the engine, and the charging lamp stays off, the
charging system has failed. If such occurs, immediately
contact your local dealer for repair.

A If any warnings and problems are displayed, an alarm

buzzer will beep. (See "LIST OF SCREENS" section
for detail.)

A Consult your local KUBOTA dealer from details

concerning care and maintenance.

(1) Warning lamp (red, yellow)

(1) Charging lamp

CHECKS BEFORE START12

C Engine oil pressure low warning

When the engine oil pressure drops too low, the lamp
(red) starts flashing and the following message appears in
the display.
Immediately stop the engine and check the engine oil
level.

(1) Oil lamp

A If the starter key is turned to the "RUN" position

without running the engine and the oil lamp stays off,
then the hydraulic system may have failed.
If such occurs, immediately contact your local dealer
for repair.

C Information

(1) Information switch

A " mark" may appear together with a warning
message.
If such occurs, the details can be checked by pressing the
information switch.
When contacting your local dealer for repair, notify them
of the information provided.

For Example;

Press the information switch, and a detail such as shown
below appears.

C Various error warnings

If any components are detected to be in trouble, the
following message or similar appears onscreen.
(See "LIST OF SCREENS" section)

For Example;

A Press the information switch again, and the display

goes back to the previous screen.

User settings

A If you have any question, consult your local KUBOTA

Dealer.

BSetting the Clock

1. Turn the starter key to the "RUN" position.

13CHECKS BEFORE START

3. Press the switch 2 twice to move the cursor into
position. Then press the save switch 5 to make the
following screen appear. By pressing the switch 4, the
year, month, day, hour and minute will be selected in
this order. Select an item to readjust.

(1) Starter switch (A) STOP

(B) RUN
(C) START

2. Press the switch 1 to make the log record/periodic
check/clock set screen appear.

(1) Switch 5
(2) Switch 2

(3) Switch 3
(4) Switch 4

Press the switch (Switch 2) and the numeric setting will
be smaller.
Press the switch (Switch 3) and the numeric setting will
be larger.

Hold down the or switch, and the numeric setting will
change quickly.
Press the switch (Switch 4), and the year, month, day,
hour and minute will be selected in this order.

4. Save the new setting with the switch (Switch 5).
Press this switch 5 again to set the clock.

(1) Switch 1
(2) Switch 5
(3) Cursor

(4) Switch 2 and 3
(5) Switch 4

(1) Switch 5

CHECKS BEFORE START14

[Status after setting the clock]

(1) Switch 5

A Be careful not to accidentally press the switch 5 on the

clock setting screen. Otherwise the seconds will be set
to "00" and the clock will show the wrong time.

A If the clock is interrupted, for example when the battery

is disconnected, the following message appears
onscreen. Press the switch 5 to set the clock again.

BReordering the year/month/day and

Changing the AM/PM System to the 24­hour One

1. On the user setting screen, select "Various
Settings".

2. Select "Calendar/Clock Set" menu screen.

(1) Switch 5

A When the user setting switch (Switch 1) is pressed on

the clock setting screen, the clock is not readjusted
and returns to the previous menu screen.

15CHECKS BEFORE START

3. Press the switch 5 and the following detailed screen
shows up.

(1) Switch 1
(2) Switch 2 and 3
(3) Switch 4
(4) Switch 5

(A) Year/month/day display
(B) Clock display

(1) Using the switch 2 and 3, move up and down the

items. The year/month/day on Side (A) will be
reordered.

(2) Using the switch 4, move the cursor to Side (B).

Select the "AM/PM" system or the "24-hour"
system.

(3) Press the switch 5, and the new settings will be

made.
If the switch 1 is pressed, the previous settings will
remain.

2. Press the switch 1 to make the menu appear
onscreen.

3. Press the switch 2 and 3 to select the log record. Fix
this choice with the switch (Switch 5).

(1) Switch 1
(2) Switch 5

(3) Cursor
(4) Switch 2 and 3

4. Press the switch 5 to make the calendar appear
onscreen.
Press the switch 2, and the log records (machine's
operating days and operating hours) for the last month
and the month before last (90 days ago) can be
reviewed.
The highlighted days indicate when the machine was
operated.

BLog Record

The log record helps you check the last 3-month operating
record of the machine. Take the following steps.

1. Set the starter key to the "RUN" position.

(1) Starter switch (A) "STOP"

(B) "RUN"
(C) "START"

(1) Switch 5
(2) Switch 2, 3 and 4

A Some days may appear marked with [-] when the log

record is unknown because of a new setting of the
clock, a disconnection of the battery or other factors.

CHECKS BEFORE START16

BPeriodic Check

The following message appears on the LCD 10 hours
before a periodic check.

Press the switch 4 to see the check results.

BIf All the Check Points are not Displayed at

a Glance on a Single Screen

1. Press the switch 4.

2. Each time the switch 2 or 3 is pressed, the check
points scrolled up or down.

(1) Switch 4
(2) Switch 2

(3) Switch 3

(1) Switch 4

Do the following servicing listed below.

A When the servicing has been completed, turn the key

switch ON and OFF 10 times or more and the check
screen automatically disappears.

A When the periodic check interval has passed, the

message "Periodic Check Passed" shows up.
Immediately perform the specified servicing.

A The periodic check screen can also be preset to be

made to disappear manually only. To do this, it is
necessary to select "Periodic Check" on the user
setting menu.
For make this setting, contact your local dealer.

17CHECKS BEFORE START

C Service hour meter

When the hour meter reaches the hours circled in the maintenance list below, a message appears. The message shows
up as follows.

No. Check points Measures

50 100 250 300 500 550 750 800 1000 2000

Hour meter indicator

Intervals

1 Engine oil (CF-4)

change

2 Hydraulic oil

Outer

Air filter

3

element

4 Fuel filter

5 Engine oil filter

6 Drive unit oil change

Hydraulic return filter

7

Hydraulic suction

8

9 Pilot filter replace

10

filter element

Idlor, Track roller,

element

element

element

grease

Inner

replace

replace

-

every

250 hrs

every

1000 hrs

every

1000 hrs

every

1000 hrs

every

500 hrs

every

250 hrs

every

500 hrs

every

500 hrs

every

1000 hrs

every

1000 hrs

every

2000 hrs

11 Breather filter replace

every

500 hrs

First operation

CHECKS BEFORE START18

BWhen the Check-up is Completed

When the check-up is completed, perform the following
procedure to make the Periodic Check disappear from the
screen.

1. The message below appears onscreen to prompt the
completion of the check-up.

2. To take a look at the check points, press the
information switch. The check points appear
onscreen.

3. When the check-up has been completed, press the
switch 5. If not, press the switch 1 to go back to the
previous screen.

BLight Switch

When the starter switch is in position "RUN", the working
light(s) and CAB light(s) will be switched on by pressing
the switch.

(1) Light switch

(1) Switch 4
(2) Switch 1
(3) Switch 5

BHorn Switch

(1) Horn switch

C Night operation

To avoid personal injury or death:
A When the working light and CAB light alone do

not provide sufficient visibility, prepare
additional stationary artificial lighting and
observe safety rules for night work.

BAUX Port Enable Switch

It is possible to freely readjust the actuator's maximum
flow rate in the AUX operating mode.
(See "AUXILIARY PORT OPERATION" section for
detail.)

(1) AUX port enable switch

19CHECKS BEFORE START

BAuto Idle Control Switch

The switch is used to enable and disable the auto idle
control.

A Enable: Press the auto idle control switch. When

the auto idle control is on, the auto idle
control lamp stays on.

A Disable: Press the auto idle control switch once

again. Now the auto idle control is
deactivated
(The auto idle control lamp goes out.)

BTravel Speed Switch

Travel speed will increase when this switch is pushed
down.
Switching the dual travel speed:

1. Press the travel speed switch. The buzzer beeps twice
and the travel speed changes from low to high. The

symbol lights up.

2. Press the travel speed switch again, and the buzzer
beeps once and the travel speed changes from high
speed to low. The symbol goes out.

(1) Auto idle control switch
(2) Auto idle control lamp

BThrottle Potentiometer

1. Sit down on the operator's seat and turn the throttle
potentiometer clockwise (toward the high speed), and
the engine revs up.

2. To stop the engine, turn the throttle potentiometer fully
toward the low speed and keep the engine at the idling
speed. Then set the starter key to the "STOP"
position.

(1) Travel speed switch
(2) Speed indicator light

A When activating the travel speed switch, it must be

pushed down completely.

A Each time the travel speed switch is pressed, the

travel speed is switched between low and high.

(1) Throttle potentiometer

CHECKS BEFORE START20

A The travel speed automatically changes into first

speed (low speed) when the drive resistance
increases while traveling second speed (high speed).
Thereafter, when the resistance decreases, it returns
to second speed.

A If the tracks are clogged with sand or gravel while

working on soft ground, lift up the track with the help of
the boom, arm and bucket and dozer blade, and let the
track rotate to remove the sand and gravel.

(A) "Rotate to remove sand
and gravel"

CAB TYPE MACHINES

BWiper/Washer Switch

To engage the wiper, turn on the switch for the wiper when
the starter key is in the "RUN" position. A further push on
the switch will activate the washer system. Even when the
wiper switch is in the "OFF" position, the washer switch
functions if it is pressed.
A Do not activate the washer switch if the tank for the

cleaning fluid is empty; the pump can be damaged.

A Do not activate the wiper switch if the window is dry. In

this case, make sure that cleaning fluid is applied to
the pane before activating the wiper.

A In frosty conditions, make sure that the wiper blade is

not frozen to the glass before switching-on. The motor
can be damaged if the wiper system is used under
such conditions.

To avoid personal injury or death:
A Do not push the dozer control lever into the

float position as this will cause the machine to
suddenly drop.

To avoid serious injury or death:
A Do not work under the machine in this

condition.

(1) Wiper switch

BInterior Lamp

To turn on the interior lamp, set the interior lamp switch to
the "ON" positions.

(1) Interior lamp
(2) Interior lamp switch

(A) "ON"
(B) "OFF"

BOpening/Closing of CAB Door

1. Unlock the CAB door and pull the knob. Open the CAB
door fully until fixed into place.

2. To close the CAB door, push the release lever down
and close the door.

21CHECKS BEFORE START

2. Hold the grips tightly with both hands. Pull the grip
slightly upward and toward yourself to let the
windshield slide inward.

3. Pull the windshield all the way to the lock at the back
of CAB.

4. To close the window, take the reverse steps 3, 2 and 1.

BOpening/Closing of Side CAB Window

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

2. To close the side window, slide it forward or backward
until the lock snaps in at the window frame.

(1) Door knob (outside)
(2) Release lever

3. When leaving the excavator, always lock the door.

(3) Door knob (inside)

BOpening/Closing of Front CAB Window

To avoid personal injury or death:
A Keep hands and feet away from the area

between front window and CAB frame.
Otherwise the operator risks serious pinching
or crushing injuries.

A Other persons should stay away when opening

the window.

To open and close the front window, take the steps below.

1. Push the lock levers beside grip.

(1) Grip

BEmergency Hammer

To avoid personal injury or death:
A When breaking the window pane, close your

eyes and cover them with an arm.

The emergency hammer is for breaking window pane in
order to quick escape from the cab, if the window is not
open.

(1) Grip
(2) Lock lever

(1) Emergency hammer

CHECKS BEFORE START22

AIR CONDITIONER

BAir Flow

Air in the CAB and fresh air introduced into the CAB flow
as shown in the figure. Adjust the five air outlet ports to
obtain the desired condition.

(C) "FRESH AIR INLET"

A Do not allow water to enter the fresh air port while

washing the excavator.

(A) "FRONT WINDOW"
(B) "CHEST AREA"
(C) "FOOT AREA"
(D) "SIDE WINDOW"
(E) "BACKWARD"

Position the inlet selector lever to the desired position.

(1) Inlet selector lever (A) "FRESH AIR INLET" position

(B) "INNER AIR RECIRCULATION" position

BAir Control Vent

C Front air outlet

The front air outlets can be independently adjusted as
required. To defrost the windshield, rotate the outlets
toward the windshield.

(1) Front air outlet (A) "FRONT WINDOW"

(B) "CLOSED"
(C) "FOOT AREA"

23CHECKS BEFORE START

BControl Panel

(1) Air conditioner switch
(2) Indicator light

C Air Conditioner Switch and Indicator Light

Push this switch to activate the air conditioner. An
indicator light will light up when the switch is set to "ON".
Push switch again to turn air conditioner off, the indicator
light will go off.

C Temperature Control Dial

Set this dial at the desired position to obtain the desired
air temperature. Turn the dial to the right to obtain cooler
air. Turn it to the left to obtain warmer air.

C Blower Switch

Air volume can be changed in three steps. At the "3"
position, the largest air volume is obtained.

(3) Temperature control dial
(4) Blower switch

C Defrosting or demisting

To defrost or demist the windshield, take the following
steps.

1. Open the front air outlet and direct it to the windshield.

2. Set the blower switch and the temperature control dial
to the "3" and "WARM" (leftmost) positions,
respectively.

HANDLING THE SAFETY DEVICES

BPilot Control Lock Lever

To avoid personal injury or death:
A When the excavator is not used or left

unattended, be sure to place the pilot control
lock lever in position "LOCKED".

The pilot control lock lever is located on the left side.

BOperation

C Heating

1. Adjust the blower (1/2/3) switch and the temperature
control dial to achieve the desired temperature level.

C Dehumidifying-heating

1. Press and turn on the air-conditioner switch.

2. Turn on the blower (1/2/3) switch.

3. Adjust the temperature control dial to the "COOL" or
an intermediate position to achieve the desired
temperature level.

A Be sure to close the door while the air conditioner is

ON otherwise, you may overload the compressor.

C Cooling

1. Press and turn on the air-conditioner switch.

2. Turn on the blower (1/2/3) switch.

3. Adjust the temperature control dial to the "COOL" or
an intermediate position to achieve the desired
temperature level.

(1) Pilot control lock lever (A) "UNLOCK"

(B) "LOCKED"

24 OPERATION OF THE ENGINE

OPERATION OF THE ENGINE

Start the engine in the following manner:

1. Before starting the engine, make sure that all control

To avoid personal injury or death:
A Read "SAFE OPERATION" at the beginning of

this operator's manual.

A Obey the danger, warning and caution labels

on the excavator.

A To avoid the danger of exhaust fume (carbon

monoxide) poisoning, do not operate the
machine in a closed building without proper
ventilation.

A Always start the engine from the operator's

seat. Do not start the engine while standing
next to the excavator. Before starting the
engine, sound the horn to get the attention of
persons standing nearby.

levers are in the neutral positions.

(1) Horn switch

A Do not use starting fluid or ether.
A In order not to overload the battery and starter, avoid

engaging the starter for more than 10 sec.

A If the engine does not start in 10 sec., please wait 20

sec. or more, before attempting to restart.

STARTING THE ENGINE

(1) Attachment control lever (left)
(2) Drive lever (left)
(3) Drive lever (right)
(4) Attachment control lever (right)
(5) Throttle potentiometer

2. Pull the pilot control lock lever all the way back.
("LOCKED" position)

3. Put the throttle potentiometer in the middle between
" " and " " symbols. The auto idle control
switch is in the OFF position.
(See "AUTO IDLE (AI) OPERATION" in the Excavator
operation.)

To avoid personal injury or death:
A The operator should not depend solely on the

warning lamps, but should always conduct the
routine checks (see "MAINTENANCE").

(1) Throttle potentiometer
(2) Auto idle control switch

25OPERATION OF THE ENGINE

4. Set the starter key to the "RUN" position. Hold the key
at this position until the " " mark on the display panel
disappears.

(1) Starter switch (A) "STOP"

(B) "RUN"
(C) "START"

5. Now make sure the " " and " " marks appear
onscreen. If not, the system has malfunctioned.
Contact your local dealer for repairs.

6. Turn the key to the position "START" and release
after the engine has started.

7. Check if all warning lamps have gone out. Should a
warning lamp still be lit up, stop the engine then
remove the key and check for the cause.

A The starter motor draws a large current. Avoid running

it longer than 10 seconds continuously.
If the engine fails to start within 10 seconds, set the
key to the "STOP" position, wait for 20 seconds or
longer, and repeat the above steps 5 thru 7.

A If the battery is dead and must be connected to

another battery with jumper cable, be sure to use a
12V battery. Never use 24V batteries.

A If you keep the pilot control lock lever at "UNLOCK"

and try to start the engine, "Up Lever Lock" appears
on the meter panel and the engine cannot be started.
Before staring the engine, make sure the pilot control
lock lever is set at the "LOCKED" position.

A When the engine starts, the meter may momentarily

turn off and a beep may sound. This is not a problem.

STARTING THE ENGINE UNDER COLD
CONDITIONS

To avoid personal injury or death:
A Make sure that the pilot control lock lever is in

the "LOCKED" position during warm up.

Start the engine in the following manner;

1. Make sure the auto idle control switch is at the "OFF"
position (lamp off).

2. Pull the pilot control lock lever all the way back.
("LOCKED" position)

3. Insert the starter key into the starter switch.

4. Turn the throttle potentiometer toward " " (high
speed) position.

5. Set the starter key to the "RUN" position. Hold the key
at this position until the " " mark on the display panel
disappears.

6. Turn the starter key to the "START" position.

7. Once the engine starts, release your hand from the
key. The key will return back to the "RUN" position.

8. If the engine fails to start, set the starter key to the
"STOP" position, and repeat the above steps 5 thru 7.

A Let the engine warm up after start-up for approx. 10

minutes under no load conditions. If the hydraulic fluid
temperature is too low, the operation will be affected.
Do not operate the excavator under full load until the
engine has sufficiently warmed up.

OPERATION OF THE ENGINE26

STARTING WITH AN AUXILIARY BATTERY

To avoid personal injury or death:
A Battery gases can explode.

Do not smoke and keep sparks and flames
away.

A Do not start the engine with an auxiliary battery

if excavator battery is frozen.

A Do not connect the black jumper cable to the

negative (-) terminal of the excavator battery.

BObserve Following Guidelines when

Starting with an Auxiliary Battery

1. Bring the helping machine with the same battery
voltage as near as possible to the excavator.
THE MACHINES MUST NOT COME IN CONTACT
WITH EACH OTHER.

2. Bring the levers and pedal of both vehicles in the
neutral position and put the pilot control lock lever in
the "LOCKED" position.

3. Wear eye protection and rubber gloves.

4. Open the side cover. (See "Opening / closing of the
Side Cover" in "MAINTENANCE" section.)

5. Ensure the vent caps are securely in place (if
equipped).

6. Connect the terminal of the red jumper cable with the
plus (+) terminal of the low battery and connect the
other end of the cable to the plus (+) terminal of the
auxiliary battery.

7. Connect the black negative cable to the minus (-)
terminal of the auxiliary battery.

8. Connect the other end of the black cable (coming from
the auxiliary battery) to the excavator frame as far
away as possible from the low battery.

9. Start the engine of the helping machine and let it run
for a while. Start the excavator with the low battery.

10.Disconnect the jumper cables in the reverse sequence
(Steps 8, 7, 6).

11.Replace the vent caps.

(1) Low battery
(2) Jumper cables
(3) Auxiliary battery

A This excavator has a negative (-) ground 12 Volt

starting system.

A Use only the same voltage when using an auxiliary

battery.

A Using a higher voltage will cause serious damage to

the electrical system. When using an auxiliary battery,
only the compatible (same) voltage is permissible.

CHECK POINTS AFTER STARTING THE
ENGINE

After starting the engine, but before starting operation,
check the following points:

1. Put the throttle potentiometer in the middle between
" " and " " symbols and let the engine idle for
approx. five minutes. This allows the engine lubricant
to warm up and penetrate every part of the engine.

2. Once the engine has warmed up, check:
A the warning lamp "Engine oil pressure" has gone

out.

A the warning lamp "Battery charge" goes out when

engine speed is increased.

A the color of the exhaust is normal and no abnormal

noises or vibrations are heard or felt.

A no fluid is leaking from pipes or hoses.

C Should any following conditions occur, stop the

engine immediately.

A The engine rpm's increases or decreases suddenly.
A Sudden abnormal noises are heard.
A Exhaust is black.
A Warning lamp for engine oil lights up during operation.

A In these cases, the excavator must be checked and

serviced by your local the KUBOTA dealer.

27OPERATION OF THE ENGINE

STOPPING THE ENGINE

To avoid personal injury or death:
A Do not keep the bucket or dozer in an elevated

position, as a person could accidentally touch
the levers and cause serious accidents.

1. Place the bucket and dozer on the
ground.

2. After slowing the engine to idle, turn
the key to "STOP".

3. Remove the key.

4. Pull the pilot control lock lever to
"LOCKED" position.

BEngine Stop Button

To avoid personal injury or death:

A Keep hands away from rotating parts.

BPrecautions in case of Overheat

To avoid personal injury or death:
A Do not open the radiator cap during operation

or just after shut-down. Otherwise, steam or
very hot coolant may gush out, getting you
scalded. Make sure the radiator has cooled
down enough before opening its cap.

If by any chance the coolant temperature rises close to or
above the boiling point ("H" on the water temperature
gauge) (overheat condition), take the following steps.

1. Stop operating the machine.
(Relieve the engine of any load.)

2. Do not shut off the engine suddenly. Before shutting
off the engine, keep it idling under no load for about 5
minutes.

3. Stay away from the engine or overflow for 10 minutes
or until the steam overflow stops.

4. Be sure that there is no danger of getting scalded.
Pinpoint and remove the cause of overheat, referring
to the "TROUBLESHOOTING" section. Once the
issue is resolved, the engine may be restarted.

A Be sure to return the stop button to former position

after the engine stops.

The engine stops when the starter key is turned off. If the
engine does not stop, pull the stop button to stop the
engine.

(1) Stop button
(2) Starter key

28 EXCAVATOR OPERATION

EXCAVATOR OPERATION

RUNNING-IN OF THE NEW EXCAVATOR

The operation and care of the new excavator influences
its life span. Your new excavator has been carefully
checked and tested before leaving the factory. In spite of
this, all movable components must run-in during the first
50 work hours. Do not work with full rpm's and full loads
during this period. It is very important to run-in your
excavator properly in order to achieve its full performance
and longevity. During the running-in, the following points
should be adhered to in all cases.

BDo not Work with Full Engine Rpm's or

Full Loads during the First 50 Working
Hours

A Let the engine warm up sufficiently in the cold season.
A Do not let the engine rev-up more than necessary.

BOil Change in the Run-in Stage

The lubrication oil plays a specific and important role
during the run-in phase of the excavator. The numerous
movable parts are not yet run-in, so many fine metal
particles are generated, which can cause damage and
shorten the life of many components. Pay attention to the
oil-change intervals and complete them sooner than later.
See "REGULAR CHECKS AND MAINTENANCE WORK"
section for more details on the oil-change intervals.

BAdjusting the Operator's Seat

To avoid personal injury or death:
A Make sure that the seat is completely secured

after each adjustment.

(1) Backrest tilt adjust lever
(2) Travel adjust lever
(3) Weight adjust lever

C Tilt adjustment

Pull the backrest tilt adjust lever in the direction of [A]
and move the backrest to the desired angle.

(A) "UNLOCK"
(B) "UNLOCK"
(C) "TO INCREASE TENSION"
(D) "TO DECREASE TENSION"

C Travel adjustment

Pull the travel adjust lever in the direction of [B] and
slide the seat backward or forward, as required. The
seat will lock in position when the lever is released.

C Weight adjustment

Turn the weight adjust lever to achieve the optimum
suspension setting.

C Height adjustment

The seat height can be adjusted to three positions. To
adjust the seat height, slowly raise the seat until it
automatically engages in the next stop.
When the seat is raised over the highest stop, it will be
lowered automatically to the lowest position again.

29EXCAVATOR OPERATION

BSeat Belt

To avoid personal injury or death:
A Always use the seat belt with a ROPS/OPG (Top

Guard Level I) protection structure. Adjust the
seat to the optimal position and buckle up.

(1) Seat belt

BPilot Control Lock Lever

To avoid personal injury or death:
A To avoid injuries, check safety aspects all

around the excavator.

A If the pilot control lock lever is pulled down, the engine

will fail to start.

Don't attempt to start the machine with the pilot control
lock lever in the down position (A), if attempt is made the
following message appears on the LCD.

STARTING

To avoid personal injury or death:
A No persons, other than those who have read

and understand this manual and who are
familiar with the excavator, should be allowed
to use the excavator.

A Do not allow any person other than the

operator to ride on the excavator.

A When operating, keep hands and body inside

of the ROPS/OPG (Top Guard Level I)
protective.

A Do not touch the control levers and the pedals

from outside the cab while the engine running.

(1) Pilot control lock lever (A) "UNLOCK"

(B) "LOCKED"

A Always pull pilot control lock lever up to "LOCKED"

position (B) when you stop the engine or leave the
operating structure.

EXCAVATOR OPERATION30

DRIVING

To avoid personal injury or death:
A Before starting the engine, make sure that no

one is near the excavator.

A Before operating the excavator, check the track

direction. (Front idler and dozer blade to the
front of the excavator).

A Recommended technique for working on a

slope.

1. Adjust the engine speed from idling to an intermediate
speed.

2. Unlock the pilot control lock lever and pull in the bucket
and hold the bucket about 20 to 40 cm above the
ground.

(A) "Front of the excavator"

A Use extra caution when traveling across a

slope or working sideways on a slope.

(1) Pilot control lock lever (A) "UNLOCK"

(B) "LOCKED"

(A) 20 to 40 cm

31EXCAVATOR OPERATION

3. Activate the dozer control lever to raise the dozer.

(1) Dozer control lever
(2) Dozer

(A) "Raise"
(B) "Lower"

BDrive Levers (Right,Left)

To avoid personal injury or death:
A When driving the excavator keep the dozer

blade in front. To move the excavator forward,
move the drive levers to (A) and to move in
reverse, move the drive levers to (B) with dozer
blade in front. If the dozer blade is behind
operator station, then the controls are
reversed, moving the excavator forward will
require (B) and moving the excavator
backwards will require (A), but this is not
recommended.

TURNS

To avoid personal injury or death:
A Do not change direction on steep slopes, or the

excavator could tip over.

A Before changing direction, beware of people in

the work area.

BPivot Turn

A Movement as illustrated is done with the dozer blade

in front of the operator.

C Change of Direction while Travelling

1. While travelling forward, bring the left drive lever into
the neutral position;
the excavator will turn in the direction of the arrow of

the illustration below.

Pushing the drive levers forward, moves the excavator
forwards, and vice-versa. The front of the excavator is the
side where the dozer is located; the drive sprocket is in the
rear of the excavator.

(1) Drive lever (left)
(2) Drive lever (right)

(A) "Forward"
(B) "Backward"
(C) "Straight"

(A) "Travelling forward" (N) "Neutral position"

EXCAVATOR OPERATION32

2. While travelling backward, bring the left drive lever into
the neutral position;
the excavator will turn in the direction of the arrow of
the illustration below.

(B) "Travelling backward" (N) "Neutral position"

C Change of Direction while Stationary

1. Push the left drive lever forward;
the excavator will turn in the direction of the arrow of
the illustration below.

2. Pull the left drive lever backward;
the excavator will turn in the direction of the arrow of
the illustration below.

BSpin Turn

When both drive levers are activated in the opposite
directions, both tracks will rotate with the same speed but
in opposite directions. The center of rotation is the center
of the excavator.

(A) "Left spin turn"

(B) "Right spin turn"

33EXCAVATOR OPERATION

UP AND DOWNHILL DRIVING

To avoid personal injury or death:
A When travelling up or down a slope, use extra

caution and follow the instructions below.

While traveling uphill, keep the lower edge of the bucket
approx. 20 to 40 cm above the ground. Although the
KUBOTA excavator will not slip easily because of the
tracks, it is safer to let the bucket slide over the ground
while traveling downhill. Always choose slow speed for
uphill and downhill traveling.

[UPHILL TRAVELING]

PARKING ON A SLOPE

To avoid personal injury or death:
A When the excavator is parked or left

unattended on a slope, be sure to put the
bucket on the ground and place all control
levers in neutral position, then brace the tracks
with chocks.

(1) Chock

[DOWNHILL TRAVELING]

(A) 20 to 40 cm

OPERATION OF THE DOZER

1. To raise the dozer, pull back the control lever. To lower
the dozer, push the control lever forward.

To float the dozer, push the control lever more forward
to the locked position.

(1) Dozer control lever
(2) Dozer

(A) "Raise"
(B) "Lower"
(C) "Float" (Locked position)

2. While undertaking earth moving work, control both
drive levers with the left hand and the dozer control
lever with the right hand.

EXCAVATOR OPERATION34

TWO PATTERN SELECTION SYSTEM
(TPSS)

To avoid personal injury or death:
A Study control lever pattern A and pattern B.

Then choose the one which is most familiar.

A Position the pattern selector lever (located on

the right side of operator's seat) in either the
lower position (Pattern A) or the upper position
(Pattern B).

A Engage the lever lock to prevent accidental

pattern change.

A Familiarize yourself with the pattern selected

by operating slowly.

BPattern Change

Position the pattern selector lever to the desired
position.

Lever

Position

Pattern A

Attachment

Control Lever

(Left)

A

Boom down

B

Boom up

C

Swing left

D

Swing right

Attachment

Control Lever

(Right)

Arm out (up)
Arm in (crowd)
Bucket crowd
Bucket dump

(1) Pattern selector lever
(Two Pattern Selection System:TPSS)

(A) "Pattern A"
(B) "Pattern B"

Pattern B

A

Arm out (up)

B

Arm in (crowd)

C

Swing left

D

Swing right

Boom down
Boom up
Bucket crowd
Bucket dump

35EXCAVATOR OPERATION

OPERATION OF THE BOOM

To raise the boom, pull the attachment control lever back.
The boom is equipped with a cushion cylinder which helps
prevent excavated material in the bucket from falling out.
At low hydraulic oil temperature, (e.g. after starting the
engine in cold weather) the cushioning function will be
effected for a short period of time (approx. 3 to 5
seconds). This condition results from the viscosity of the
hydraulic oil and is not a sign of malfunction.
The cushion cylinder will operate normally as the oil
warms up.
To lower the boom, push the attachment control lever
forward.

OPERATION OF THE ARM

Pull back the attachment control lever and the arm will be
pulled in. To move the arm out, push the control lever
towards the front.

A When pulling in the arm, the movement may stop for a

short moment when the arm is in its vertical position.
This is caused by the combined load of the arm and
bucket moving the cylinder piston away from the
hydraulic flow causing a delay in the cylinder action,
until the flow catches up with cylinder piston. This is a
characteristic of the hydraulic system and is not a sign
of malfunction.

A When lowering the boom, make sure that it does not

hit the dozer and that the bucket teeth do not touch the
dozer.

EXCAVATOR OPERATION36

OPERATION OF THE BUCKET

To dig using the bucket, move the right attachment control
lever from the neutral position, left. Moving the control
lever right, moves the bucket outwards and empties its
contents.

BUnit Swing Operation

1. Move the control lever to the left and the upper
structure will turn to the left.

2. Move the control lever to the right and the upper
structure will turn to the right.

BBoom Swing Operation

1. Flip the pedal lock up to unlock the pedal.

2. Step on the left side of the pedal to swing the boom to
the left.

3. Step on the right side of the pedal to swing the boom
to the right.

UNIT SWING AND BOOM SWING
OPERATION

To avoid personal injury or death:
A When working in groups, always let the others

know what you are going to do before you do it.

A Keep others away from the machine working

area.

A Be sure to lock the boom swing pedal when the

boom swing function is not used.

(1) Boom swing pedal
(2) Pedal lock

A Do not operate the left attachment control lever

abruptly from right to left (or vice versa), because the
inertia may cause high impact loads on the swing gear
and the swing motor, shortening the life of the
excavator.

37EXCAVATOR OPERATION

AUXILIARY PORT OPERATION

The auxiliary port enable switch is used to operate hydraulic attachment such as hammers.

BSelecting the Action Modes

The AUX port has been factory-set to three action modes. You can select one of them. Up to five action modes can be
preset.
Each time the AUX port enable switch (switch 3) is pressed, the action modes change over one after another. And the icon
and action mode number on the screen change accordingly.

A When turning the starter key to the "RUN" position, the action mode will return to the last action mode used.

EXCAVATOR OPERATION38

C Checking the settings of each action mode

When an action mode is selected and the " " mark
appears at the lower right of the icon, the flow volume
setting gets displayed by pressing the switch 4.

(1) Icon
(2) Information mark
(3) Information switch (Switch 4)

[Display in AUX 1 modes]

BAUX Port Handling Procedure

1. Turn the starter key to the "RUN" position.
Let the engine warm up after start-up for approx. 10
minutes under no load conditions.

(1) Starter switch (A) "STOP"

(B) "RUN"
(C) "START"

2. Lower the pilot control lock lever (UNLOCK).

(1) AUX Port 1
(2) AUX Port 2

(1) Pilot control lock lever (A) "UNLOCK"

(B) "LOCKED"

39EXCAVATOR OPERATION

3. Push the AUX port enable switch (switch 3).

(1) AUX port enable switch (Switch 3)

A If the pilot control lock lever is at the "LOCKED"

position, the following message appears onscreen.
Down this lever to the "UNLOCK" position and then
press the AUX port enable switch (switch 3).

A Proportional control of the AUX port knob allows for

slow-to-fast movement of attachment.
Example; If you move the AUX port knob halfway, the
attachment will move at approximately one-half speed.

C One way hold

Press the one way hold switch of the right attachment
control lever, and the oil continues to flow through the
AUX port 2. Press this switch again or move the AUX port
knob, and the oil flow is interrupted.

4. Move the AUX port knob of the right attachment
control lever to the right to send oil to the AUX port 1.
Move the AUX port knob to the left to send oil to the
AUX port 2.

(1) Attachment control lever (right) (A) "AUX port 1"

(B) "AUX port 2"

(1) Attachment control lever (right)
(2) One way hold switch (right)

(B) "AUX port 2"

A Even if the one way hold switch of the right attachment

control lever is pressed, no function is assigned. In this
case, the following message appears onscreen.

EXCAVATOR OPERATION40

BSetting the Maximum Flow Volume

The AUX port has been factory-set to three action modes
1, 2 and 3. The action modes 4 and 5 can also be preset.

C How to make the settings

1. With the starter key at the "RUN" position, press the
user setting switch (switch 1), and the following display
appears onscreen.

(1) User setting switch (switch 1)

3. Each time the switch 5 is pressed, the mode number
changes. Select your desired setting mode number.

(1) Icon
(2) Mode No.
(3) Switch 5

4. Take the following steps to set the icons.
Each time the switch 4 is pressed, the setting cursor
(arrow mark) shifts position. Move the cursor above
the icon.

2. Press the switch 2 or 3 to select "AUX Flow Ctrl Set",
and then press the switch 5.

(1) Switch 2 and 3
(2) Switch 5

(1) Setting cursor (arrow mark)
(2) Icon
(3) Switch 4

41EXCAVATOR OPERATION

5. Each time the switch 2 or 3 is pressed, the icon
changes. Select your desired icons.

(1) Switch 2
(2) Switch 3
(3) Icon

C Types of AUX icons

A There is no relationship between the icons and the

flow control settings. Select icons to suit the images of
attachments to be connected.

A In an action mode with the disable icon preset, such

action mode is skipped even if selected.

Take an example of the following settings:
AUX (standard) icon for action mode 1,
Breaker icon for action mode 2,
Disable icon for actions modes 3, 4 and 5.

Each time the AUX port enable switch (switch 3) is
pressed, the display changes from action mode 1,
action mode 2 to normal mode in this order.

[Setting example]

(1) AUX (Standard)
(2) Brush cutter
(3) Rotary grapple
(4) Grapple
(5) Auger

(A) Blank (disable) icon

(6) Clamshell
(7) Breaker
(8) Tilt bucket
(9) Thumb
(10) Blank (disable)

EXCAVATOR OPERATION42

6. Set the maximum flow volume for each AUX port.
Press the switch 4 to move the setting cursor (arrow
mark) to the port 2 position of Thumb port at the right.

(1) Setting cursor (arrow)
(2) Switch 4

7. Press the switch 2 or 3 to preset the maximum flow
volume.
Set the bar to the highest level, and the flow volume
will be maximized.
Set the bar to the lowest level (no bar displayed), and
there will be no oil flow.
Then press the switch 4 to go to the next port, and
make the settings for all the other ports.

(1) Switch 2 (Lower flow volume)
(2) Switch 3 (Higher flow volume)

(A) "MAX. flow volume"
(B) "Output interrupted"

(3) Switch 4

(1) AUX 1 (A) "AUX port 1"

(B) "AUX port 2"

A Some attachments might not be activated even when

the bar level is still somewhat above the lowest
position. Or even when the bars of ports 1 and 2 are
at the same level, the same speed might not be
achieved. This does not indicate a machine problem,
however. Readjust the bar to the optimum level
according to your attachment manual.

A Suppose that the same attachment is mounted on

another machine. Even if the same flow control setting
is made, the same speed cannot be achieved. Make
an optimum setting on each machine.

8. Go back to Step 3 to make settings for the next action
mode. When all the settings of all the action modes
have been made, press the switch 1 to return to the
normal screen.

(1) Switch 1

C BUAUX port MAX. Flow volume

AUX 1 port

43EXCAVATOR OPERATION

MAX. flow volume
(Theoretical L/min)

MAX. pressure
MPa (kgf/cm )

A When the AUX port is not used for a long period, dirt

particles can settle in the lower part of the AUX port
lines. When the plugs on the AUX port lines are
removed to connect attachments, drain approx. 100 cc
(3.4 oz) of oil before making connections.

60.5

17.2

(175)

44 EXCAVATOR OPERATION

45EXCAVATOR OPERATION

HOW TO RELEASE PRESSURE TRAPPED
IN THE HYDRAULIC SYSTEM

To avoid personal injury or death:
A Relieve residual hydraulic pressure

immediately after the engine has stopped.

1. Lower the attachments and the blade down to the
ground.

2. Turn the key to "STOP" position and shut off the
engine.

3. After stopping the engine, turn the key to "RUN"
position.

4. Set the pilot control lock lever to "UNLOCK" position.

3. Make sure that the flow volume in all the AUX ports is
not minimized.
If the pressure is removed after minimizing the flow
volume in the AUX port, release pressure is not
removed completely and the hose coupler may be
unable to connect and disconnect.

(1) Flow volume in
AUX port display

(A) Flow volume in AUX port
(B) Maximum
(C) Minimum

(1) Pilot control lock lever
(2) Attachment control lever (left)

5. Move the operating lever to release pressure in the
hydraulic system.

[How to release pressure trapped in the AUX port]

1. Perform the above operations of 1 to 4.

2. Turn "ON" the AUX port enable switch.

(1) AUX port enable switch (Switch 3)

(A) "UNLOCK"
(B) "LOCKED"

(B) Maximum status of flow volume in AUX port
(C) Minimum status of flow volume in AUX port

EXCAVATOR OPERATION46

4. Move the AUX port knob mounted to the operating
lever to the right to release pressure in the AUX port.

(1) AUX port knob
(2) Attachment control lever (right)

1-way or 2-way CIRCUIT SELECTION
VALVE OPERATION

A selection valve which selects 1-way or 2-way circuit of
service port has been installed on the hydraulic tank.

1. When equipment which needs a 1-way circuit will be
used, position the arrow, by using the selector lever,
on the axis of the selection valve to the 1-way circuit
position, to reduce the back pressure.

2. When equipment which needs a 2-way circuit will be
used, position the arrow on the axis of the selection
valve to the 2-way circuit position.

A 1-way circuit.....

A 2-way circuit.....

HAMMER etc.
THUMB, TILT BUCKET,
AUGER, GRAPPLE etc.

(1) Selection valve
(2) Selector lever

To avoid personal injury or death:
A Stop the engine before removing/changing the

equipment.

A Release pressure in the hydraulic system

before removing/changing the equipment. (See
"HOW TO RELEASE PRESSURE TRAPPED IN
THE HYDRAULIC SYSTEM".)

A Position the selection valve to the correct

position (either 1-way or 2-way circuit
selection) before mounting the equipment.

A Always select the correct valve position before

mounting the equipment (1-way or 2-way
circuit selection) to avoid sudden movement of
the equipment.

A Leaving the selection valve to 1-way circuit selection

and attaching 2-way circuit equipment may cause the
equipment to move (drop) suddenly due to its own
weight, as the tank line remains open, even with the
engine off.

47EXCAVATOR OPERATION

AUTO IDLE (AI) OPERATION

1. Throttle potentiometer
With this potentiometer the operator can adjust the
engine speed when the auto idle control is activated.

2. Auto idle (AI) control switch
With this switch the auto idle control is turned on or off.
The auto idle control allows the engine speed to drop
to idle speed when the control levers are left in neutral
for longer than four seconds. If the control is activated,
the engine speed rises immediately to the preset rpm.
If the auto idle is not activated the throttle
potentiometer can be utilized to control engine speed
in a similar way to a conventional throttle control lever.

(1) Throttle potentiometer
(2) Auto idle control switch
(3) Auto idle lamp

A It is possible that the auto idle may not function until

hydraulic oil warms up in the cold weather. Therefore
it is not recommended that the Auto Idle be activated
until the machine is completely warmed up.

A Before operating the control lever, check the auto idle

lamp.

A When operating in confined spaces or when loading

onto a vehicle, turn the auto idle control switch off
(lamp off). This is to prevent unwanted engine speed
increases when control levers are activated.

A The auto idle control, when selected by a switch,

provides the operator with a way to control engine
speed without moving the throttle potentiometer,
simply by not activating any control levers for about
four seconds after stopping work, and then to simply
restore a preset (by potentiometer) engine speed by
activating any control lever to return to work.

A The purpose of the system is to reduce fuel

consumption, noise and operator fatigue.

EXCAVATOR OPERATION48

IMPORTANT INFORMATION ON
EXCAVATOR OPERATION

A Do not try to crush concrete or boulders using side

swings with the bucket. Also avoid using side sweeps
of the bucket to move earth piles.

A Under all circumstances avoid the following

operations:
A Excavation using the gravitational impact of the

machine.

A Compacting of gravel or soil using the dropping

action of the bucket.

A Excavation using the traveling power of the

machine.

A Do not try to drop or shake off soil adhering to the

bucket in the manner given in the points below. This
can cause damage to the machine.
Adhering soil can be shaken off when the bucket is
being emptied by moving the bucket out to the
maximum stroke of the cylinder. Should this not
suffice, swing out the arm as far as possible and
operate the bucket back and forth.

A Do not hit the dozer with the boom cylinder!

Make sure that the boom cylinder does not hit the
dozer when doing deep excavation. If necessary
swing around so that the dozer is in the back of the
machine.

A Pay attention when pulling in the bucket!

When pulling in the bucket (for driving or
transportation) avoid hitting the dozer.

A Avoid collisions!

When moving the excavator, pay attention that the
dozer does not collide with obstructions such as
boulders, etc.
Such collisions shorten the life of the dozer and the
cylinder substantially.

A Support the machine correctly!

When stabilizing the machine with the dozer, lower the
dozer to engage the full width on the ground.

A If the water or mud level reaches higher than the top of

the tracks, the swivel bearing, swivel motor gear and
ring gear may be exposed to mud, water and other
foreign objects.
The excavator must be properly pressure washed
after each use.
A Thoroughly clean the area around the swivel

bearing, swivel motor gear and ring gear to remove
foreign objects.

A Inspect the swivel motor oil sump (if equipped) for

water contamination. If water is present, refer to
operator's manual for lubricant replacement
procedure.

A Refer to operator's manual for proper swivel

bearing, swivel motor gear and ring gear
lubrication procedures.

A Reinstall any protective covering if removed

earlier.

A Avoid applying excessive load with cylinders fully

extended, or the machine easily gets damaged.

A Relieve residual hydraulic pressure immediately

after the engine has stopped.

49TRANSPORTING THE EXCAVATOR ON A VEHICLE

TRANSPORTING THE EXCAVATOR ON A VEHICLE

B Transporting on a Truck

To avoid serious injury or death:
A No directional changes should be made when

the excavator is on the ramp. Should a change
of direction be necessary, drive off the ramp
completely and make the turn.

A When driving forwards or backwards onto the

vehicle, or when swinging the upper body,
make sure that neither the CAB or the gates of
the vehicle will be damaged.

To avoid personal injury or death:
A After loading the machine on the truck, lower

the bucket and dozer onto the truck bed.

Prepare a platform to load or unload the excavator. Take
following steps when using ramps.

1. Apply the parking brakes of the vehicle, and block the
drive wheels from both sides.

A When the excavator reaches the point between

the ramps and the bed, halt and then move very
slowly until the excavator reaches the
horizontal position.

A Move the excavator onto the vehicle only with

the arm completely pulled in.

A Do not jack up the machine using its boom to

load or unload the excavator from the vehicle.
Doing this is dangerous. Otherwise the CAB of
the vehicle could be damaged when swinging
around the upper body.

A Make sure the ramps are of sufficient capacity

and securely connected to the vehicle to
support the machine safety throughout the
loading / unloading operation.

2. Use mounting brackets to secure the ramp properly.
Connect the ramps directly with the bed.

TRANSPORTING THE EXCAVATOR ON A VEHICLE50

3. For additional safety, use blocks or supports under the
ramps and the bed.

(1) Chain
(2) Block

4. Completely align the ramps and the tracks and then
drive the excavator slowly up the ramps. After
ensuring that the tracks are completely on the bed,
swing the upper body around to the back of the
vehicle.

5. Lower the dozer onto the bed.

6. Pull in the bucket and arm completely. Then lower the
boom.

7. Stop the engine, release pressure trapped in the
hydraulic system and remove the key.

8. Raise the pilot control lock lever.

9. Block the tracks with blocks and tie down the
excavator.

B Towing the machine

To avoid personal injury or death:
A When towing the excavator or pulling a load

must be less than the strength of the towing
line attached to excavator. Not to be used for
tie-down or lifting the machine.

A Towing is only allowed over a short distance

and at walking speed.

1. Attach the tow bar or towing rope to the hook on the
excavator and to the pulling vehicle. The tow bar
should be mounted at a right angle to the vehicles.

2. The operator must be seated during the recovery
procedure.

3. Drive slowly with the tractive vehicle to avoid abrupt
loads.

(A) Tie down point

(1) Tow line

LIFTING OF THE EXCAVATOR

(4) With the boom not swinging, set the swing pedal

to the neutral position, place the pedal cover and

To avoid serious injury or death:
A The correct instructions for safe handling are

described here. Read these instructions
carefully before moving the machine. Make
sure that the operating personnel read the
operator's manual carefully.

B Basics when Lifting with Cables or Straps

1. The lifting and crane operation is to be undertaken
according to the safe operation guidelines described.

2. The equipment used for lifting mentioned in these
instructions are only given as reference, the standards
concerning strength, control and other details are
based on the respective applicable guidelines.

B Safety Aspects when Lifting with Cables or Straps

Abide by the following steps when lifting:

1. Do not lift loads that exceed the maximum load
capacity of the crane.

2. Choose correct equipment suitable to the weight, size
and form of the load.

3. First assess the center of gravity of the load, position
the hook directly over the load and lift the load so that
the center of gravity of the load is as low as possible.

4. The steel cables or straps must be fixed in the middle
of the hook.

5. The load must be lifted vertically from the ground.

6. Do not enter the working area under suspended loads
and do not move the load over people. The load must
only be moved in an area where the balance can be
easily maintained.

[Blade ends]

(1) Shackle

[Boom top]

stop the engine.

(5) Apply shackles (3200 kg or heavier-duty) through

the openings at both ends of the blade. And apply
shackles (2000 kg or heavier-duty) through the
two openings at the boom top. Pass wire ropes
through these shackles.

51LIFTING OF THE EXCAVATOR

B Lifting Procedure for the Excavator

To avoid personal injury or death:
A Do not use the hooks on the roof of canopy and

CAB for lifting the excavator.

A When applying the shackles through the

boom's and blade's openings for lifting, be sure
to do two-point lifting for added safety.

C General guidelines for lifting

1. Lifting position. (see illustration below)
(1) Rotate the upper swivel structure until the blade

positions itself 180-degree opposite the

attachment.
(2) Raise the blade all the way.
(3) Raise the boom and get the bucket and arm in

their crowded position. Next set the pilot control

lock lever to the "LOCKED" position.

(1) Shackle

LIFTING OF THE EXCAVATOR52

2. Attaching the steel cables or straps.
(1) Always hook the excavator at three points. (one

on the boom and left and right of the dozer)

(2) Always use a shackle on each lifting hole when

attaching the cables or straps.

(3) Keep the angle between the front and rear cables

or straps within 49 .

(1) Cable or strap (A) 49 or less

4. Lifting
(1) Lift slowly and safely
(2) Do not enter the excavator area when lifting.
(3) Lift the excavator horizontally. (Modify cable or

strap connections according to needs)

Maximum strength

for example : (JIS G 35 25) - "6 x24"

Diameter zinc-plated not zinc-plated

10 mm (3/8) 45.8 KN 49.3 KN

12.5 mm (1/2) 71.5 KN 77 KN

14 mm (9/16) 89.7 KN 96.6 KN

16 mm (5/8) 117 KN 126 KN

18 mm (45/64) 148 KN 160 KN

A While lifting, carefully keep the machine well balanced

with its center of gravity in mind.

A Do not lift the machine with the boom swinging or the

upper structure swiveling.

3. Tackle
The weights of the excavators and the recommended
tackle for lifting these loads are mentioned in the
following table. Choose components having enough
strength.

CAB CANOPY

Excavator Weight*

3835 kg 3685 kg

Load / Cable 12219 N

Minimum Wire Diameter
(Safety factor=6)

14 mm or more

*Excavator Weight: With CAB, steel tracks.
Steel wire: 6X24

MAINTENANCE

MAINTENANCE INTERVALS

53MAINTENANCE

No. Check points Measures

1 Coolant

2 Fuel check Daily check 58

3 Engine oil

4 Hydraulic oil

Bucket and bucket

Grease front

5

attachments

6 Radiator and oil cooler check Daily check 60

7 Washer liquid check Daily check 61

8 Engine and electrical wiring check Daily check 61

9 Fuel tank, Water separator drain every 50 hrs 63,63

10 Battery condition check every 50 hrs 64

11 Greasing swing bearing teeth - every 50 hrs 65

12 V-belt tension

13 Radiator hoses and clamps

Air filter

14

element

15 Greasing swing ball bearing - every 200 hrs 67

16 Fuel filter cartridge replace every 500 hrs 71 @

17 Engine oil filter replace every 250 hrs 70

18 Drive unit oil change every 500 hrs 71

19 Breather filter replace every 500 hrs 72

20 Hydraulic return filter element replace every 500 hrs 72

21 Hydraulic suction filter element replace every 1000 hrs 73

22 Filter in the pilot hydraulic system replace every 1000 hrs 72

link pin

Boom swing fulcrum - Daily check 62

Others - Daily check 61

Outer element

Inner element replace every 1000 hrs 74 *2

check Daily check 58

change every 2 years 75

check Daily check 59

change every 250 hrs 70

check Daily check 59

change every 1000 hrs 73 *1

check Daily check 60

adjust every 200 hrs 66

replace every 500 hrs 72

check every 200 hrs 67

replace every 2 years 75

clean every 200 hrs 67 *2

replace every 1000 hrs 74 *2

50 100 150 200 250 300 350 400 450

- Daily check 61

Hour meter indicator

Interval

Ref.

page

@

23 Fuel injection nozzle injection pressure check every 1500 hrs 74 *4 @

24 Front idler and track roller oil change every 2000 hrs 74

25 Alternator and starter motor check every 2000 hrs 74

26 Injection pump check every 3000 hrs 74 *4 @

27 Radiator system rinse every 2 years 75

28 Fuel line and Intake air line

check every 200 hrs 68

replace every 2 years 77 *3

D 500 thru 1000 continued to the following table.

@

54 MAINTENANCE

No. Check points Measures

1 Coolant

2 Fuel check Daily check 58

3 Engine oil

4 Hydraulic oil

Bucket and bucket

Grease front

5

attachments

6 Radiator and oil cooler check Daily check 60

7 Washer liquid check Daily check 61

8 Engine and electrical wiring check Daily check 61

9 Fuel tank, Water separator drain every 50 hrs 63,63

10 Battery condition check every 50 hrs 64

11 Greasing swing bearing teeth - every 50 hrs 65

12 V-belt tension

13 Radiator hoses and clamps

Air filter

14

element

15 Greasing swing ball bearing - every 200 hrs 67

16 Fuel filter cartridge replace every 500 hrs 71 @

17 Engine oil filter replace every 250 hrs 70

18 Drive unit oil change every 500 hrs 71

19 Breather filter replace every 500 hrs 72

20 Hydraulic return filter element replace every 500 hrs 72

21 Hydraulic suction filter element replace every 1000 hrs 73

22 Filter in the pilot hydraulic system replace every 1000 hrs 72

23 Fuel injection nozzle injection pressure check every 1500 hrs 74 *4 @

24 Front idler and track roller oil change every 2000 hrs 74

25 Alternator and starter motor check every 2000 hrs 74

26 Injection pump check every 3000 hrs 74 *4 @

27 Radiator system rinse every 2 years 75

28 Fuel line and Intake air line

link pin

Boom swing fulcrum - Daily check 62

Others - Daily check 61

Outer element

Inner element replace every 1000 hrs 74 *2

check Daily check 58

change every 2 years 75

check Daily check 59

change every 250 hrs 70

check Daily check 59

change every 1000 hrs 73 *1

check Daily check 60

adjust every 200 hrs 66

replace every 500 hrs 72

check every 200 hrs 67

replace every 2 years 75

clean every 200 hrs 67 *2

replace every 1000 hrs 74 *2

check every 200 hrs 68

replace every 2 years 77 *3

500 550 600 650 700 750 800 1000

- Daily check 61

Hour meter indicator

Interval

Ref.

page

@

@

C Air-conditioner

No. Check points Measures

1 Air filter

2 Air conditioner condenser clean every 200 hrs 69

3 Air conditioner pipes and hoses

4 Refrigerant (gas) check service as required 77

clean every 200 hrs 69 *2

replace every 1000 hrs - *2

check every 1 year 75

replace every 2 years 75

50 100 150 200 250 300 350 400 450

Hour meter indicator

Interval

55MAINTENANCE

Ref.

page

No. Check points Measures

1 Air filter

2 Air conditioner condenser clean every 200 hrs 69

3 Air conditioner pipes and hoses

4 Refrigerant (gas) check service as required 77

clean every 200 hrs 69 *2

replace every 1000 hrs - *2

check every 1 year 75

replace every 2 years 75

500 550 600 650 700 750 800 1000

Hour meter indicator

Interval

Ref.

page

First operation
*1 When using a hydraulic hammer, change hydraulic oil and return filter according to the table on "Hydraulic Oil
Change (Including Exchange of the Suction Filter in the Hydraulic Tank) under "EVERY 1000 SERVICE HOURS" in the
chapter "REGULAR CHECKS AND MAINTENANCE WORK".
*2 Clean and replace the air filter more frequently if used under dusty conditions. When the filter is very dirty from dusty
conditions, replace the filter.
*3 Replace only if necessary.
*4 Consult your local KUBOTA dealer for this service.
A The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S.EPA non-

road emission regulation. As the engine owner, you are responsible for the performance of the required
maintenance on the engine according to the above instruction. Please see the warranty Statement in detail.

MAINTENANCE56

OPENING AND CLOSING OF COVERS

BOpening/Closing of the Engine Hood

To avoid personal injury or death:
A Do not open the engine hood with the engine

running unless in an emergency.

A Do not touch the exhaust muffler or the

exhaust pipe; serious burns can occur.

Insert the key into the key slot and turn it clockwise to
unlock it. And pull the catch to open the hood.
Lift the stopper up and close the engine hood.
Turn the key counterclockwise to lock the hood.

BOpening/Closing of the Side Cover

1. Open the engine hood first.

2. Raise the catch lever to unlock the side cover.

3. Push the side cover all the way forward, and it will be
held by a stopper.

(1) Catch lever
(2) Side cover
(3) Engine hood

(A) "Locked"
(B) "Unlock"

(1) Engine hood
(2) Catch
(3) Key hole

(1) Stopper

4. To close the side cover , hold it up a little more , and
pull the stay to get it unlocked. Lower the side cover
until clicks into its closed position.

(1) Stay (A) "Unlock"

(B) "Locked"

5. Pull down the catch lever to lock the side cover.

(A) Lift up

57MAINTENANCE

BWhere to store the Tool

[CANOPY type]

The tool box is located under the seat.

(1) Box for storage

[CAB type]

The tool box is located under the CAB door.

BWhere to store the Grease Gun

[CANOPY type]

The grease gun is located under the seat.

(1) Grease gun

[CAB type]

The grease gun is located under the CAB door.

(1) Box for storage

BCup Holder

(1) Cup holder

(1) Cover

(2) Grease gun

BWhere to keep Operator's Manual

(1) Operator's manual storage (2) Rear cover

MAINTENANCE58

DAILY CHECKS

To avoid personal injury or death:
A When operating, keep hands and body inside

of the ROPS / OPG (Top Guard Level I)
protective envelope.

A Do not touch the control levers and the pedals

from outside the cab while the engine is
running.

For your own safety and to assure the long life of your
machine, a careful check should be made before each
operation.

BChecking Coolant Level

To avoid personal injury or death:

A Move the excavator to even ground.
A Make sure that the engine is turned off.
A Do not open the radiator cap right after the

engine has been stopped; Serious burns can
occur from contact with escaping hot coolant
fluid.

A Check the coolant level in the recovery tank

only after the engine has cooled down.

A Remove the radiator cap only if absolutely

necessary.

The radiator has a recovery tank. Should the coolant level
in the radiator sink, the water will be automatically be
forwarded to the radiator.
Open the side cover. (See "Opening / Closing of the Side
Cover" in "OPENING AND CLOSING OF COVERS"
section.)
Check the coolant level in the recovery tank and fill up if
necessary. The coolant level should be between the
marks "FULL" and "LOW".

A Do not fill the recovery tank over the "FULL" marking.
A Do not fill with dirty or salty water.

BChecking Fuel Level

To avoid personal injury or death:

A Stop the engine and remove the key before fuelling.
A Do not smoke while fuelling.

A By temperatures over -5 , use No.2-D diesel fuel,

when temperatures are below -5 , use No.1-D diesel
fuel.

A Make sure that the fuel tank is not run empty. Air will

enter the fuel system, and must be purged before
restarting.

A See "PURGING OF THE FUEL SYSTEM" in "OTHER

ADJUSTMENTS AND REPLACEMENTS" section.

A To prevent condensation (water) accumulations in the

fuel tank, fill the fuel into the tank before parking
overnight.

1. Turn the starter key to the position "RUN".

A Even with the starter key not yet inserted, press the

electronic meter's user setting switch or the display
selector switch, and the LCD shows the hour meter,
fuel gauge, water temperature gauge and clock for 10
seconds.

2. Check the fuel level by the fuel level indicator.

(1) Recovery tank (A) "FULL" (B) "LOW"

(1) Fuel gauge (A) "EMPTY"

(B) "FULL"

3. If necessary, open the cap and fill in fuel. (See "LCD
for Normal Operation" in "CHECK BEFORE START"
section.)

Fuel tank capacity 45.1 L

BChecking Engine Oil Level

To avoid personal injury or death:
A Stop the engine and remove the key before

checking the oil level.

A Use engine oil with the correct viscosity. (according to

the outside temperature)

A After stopping the engine and remove the key, wait 5

minutes, then check oil level. (Excavator must be on
level ground.)

59MAINTENANCE

Insert the engine oil dipstick fully into the prepared
opening, remove again and check the oil level; if
necessary fill with oil. The machine must be on level
ground when checking the oil level.

(1) Engine oil dipstick
(2) Oil filling port

(A) Required oil level range

BChecking Hydraulic Oil Level

2. Check the oil level as to whether it lies on the center of
the gauge at normal temperature (10 to 30 ).

3. Enough oil is present when oil is at center mark.

4. Should the oil level be too low, loosen the oil filling plug
gradually to release pressure in the tank, then fill up
with oil at oil fill port.

(1) Gauge

To avoid personal injury or death:
A Stop the engine and remove the key before

checking the oil level.

A Before filling oil, wipe away all sand and dust from

around the oil port. Make sure to use an identical type
of hydraulic fluid.

A The excavator has been filled with hydraulic fluid

before delivery. See "RECOMMENDED OILS"
section.
(Do not mix different oils.)

1. Park the excavator on a firm, flat and level surface.
Lower the attachments and dozer blade to the ground
and stop the engine.

(1) Gauge
(2) Oil filling plug

MAINTENANCE60

BChecking V-belt

To avoid personal injury or death:
A Stop the engine and remove the key before

checking the V-belt.

A Check the V-belt for cracks and proper tension.

(See "Adjusting V-belt Tension" in "REGULAR
CHECKS AND MAINTENANCE WORK"
section.)

BChecking Radiator and Oil Cooler

To avoid personal injury or death:
A Always stop the engine and remove the key

before checking the radiator.

A Wear eye protection when cleaning with

compressed air.

A Replace all water hoses every two years.
A Inspect all water hoses daily.

Have the excavator repaired immediately if any
of the following defects are discovered.
(Such defects may cause burns or injury. They
may also cause engine failure or serious
engine damage.)
A Scratches, cracks or swelling in water

hoses.

A Water leaks at joints or connecting points.
A Missing or damaged water hose protective

sleeve or grommet.

A Loose mounting bolt, damaged bracket.

A Do not touch the water hoses or the heater with

your hand. You may get burned.

A If the window fails to defrost in extreme

conditions or becomes cloudy when
dehumidifying the CAB, remove moisture with
soft cloth.

A Never block all of the air outlets, system

malfunction may occur.

1. Check to see if the fins are clogged with dirt. If so,
remove the dirt using compressed air or a hose.
When cleaning, wear eye protection.

2. Check the rubber hoses for damage and replace if
cracked or old. Check if the hose clamps are tight
enough.

(1) Radiator
(2) Oil cooler

(1) Hose clamp
(2) Rubber hose

A Radiator and oil cooler fins and ribs must be clean in

order to avoid overheating the engine and to allow free
flow of air through the cooling elements.

A Pressure of compressed air must be under 205 kPa

(2.1 kgf.cm ).

BChecking Washer Liquid

If the windows washer is switched on with the washer
liquid tank empty, the motor may be damaged. Always
keep the tank filled.

(1) Washer liquid tank

61MAINTENANCE

BGreasing Front Attachments (without

Bucket Pin and Boom Swing Fulcrum)

To avoid personal injury or death:
A First lower all attachments on the ground then

stop the engine and remove the key.

A While greasing, take care not to step on the

bucket teeth.

A When doing excavation work in water, generously

grease the following points. After ending work, grease
again.

Grease the marked grease fittings shown by arrows in the
illustration below.

BChecking and Cleaning Engine and

Electrical Wiring

To avoid personal injury or death:
A Always stop the engine and remove the key

before cleaning the wiring, cables and engine.

Before starting, check whether flammable substances
have gathered on the battery, the cables and wiring, the
muffler or on the engine. Remove thoroughly.
Check the electrical circuitry for disconnections, shorts or
loose terminals.

BWashing Whole Machine

A Do not wash the excavator with the engine running.

Water could enter the air filter and damage the engine.
Make sure that the air filter is kept dry.

A Remove the mud before washing the machine.

(1) Boom bottom linkage
(2) Arm bottom linkage
(3) Boom cylinder boss
(4) Arm cylinder boss
(5) Bucket cylinder boss

(1) Swing cylinder boss

MAINTENANCE62

(1) Dozer cylinder boss
(2) Dozer linkage pin

BGreasing Bucket Pin

Grease the marked grease fittings shown by arrows in the
illustration below.

BGreasing Boom Swing Fulcrum

Grease the marked grease fittings shown by arrows in the
illustration below.

63REGULAR CHECKS AND MAINTENANCE WORK

REGULAR CHECKS AND MAINTENANCE WORK

BDraining Water Separator

To avoid personal injury or death:
A When operating, keep hands and body inside

of the ROPS/OPG (Top Guard Level I)
protective envelope.

A Do not touch the control levers and the pedals

from outside the cab during the engine
running.

EVERY 50 SERVICE HOURS

BDraining the Water from the Fuel Tank

To avoid personal injury or death:
A Before draining the water from the fuel tank, be

sure to stop the engine and remove the key.

A Do not smoke during inspection.

[Checking and Draining]

Water and dirt contained in fuel will settle down in the
water separator. When such foreign substances are
deposited, set the water separator handle to the "OFF"
position. Loosen the retainer ring and remove the cup.
Then dump water in the cup.

[Cleaning]

1. Set the water separator handle to the "OFF" position.

2. Loosen and remove the cup proper, and clean its
inside with light oil.

3. Tighten up the cup proper.

1. Open the drain plug.

(1) Retainer ring
(2) Cup
(3) Water separator handle
(4) Line
(5) Float

A As water is collected, the red float goes up.

When the float has reached the specified line,
immediately drain the water separator.

A In reattaching the water separator, be careful to keep

off dust and dirt.

A Be sure to purge the fuel system before getting the

machine restarted.
(See "PURGING OF THE FUEL SYSTEM" in

"OTHER CHECKS AND REPLACEMENTS"

section.)

(A) Loosen
(B) Tighten

(1) Drain plug (A) Open

(B) Close

REGULAR CHECKS AND MAINTENANCE WORK64

BChecking Battery Condition

To avoid the possibility of a battery explosion:
For refillable type battery, follow the instructions
below.
A Do not use or charge the refillable type battery

if the fluid level is below the LOWER (lower limit
level) mark. Otherwise, the battery component
parts may prematurely deteriorate, which may
shorten the battery's service life or cause an
explosion. Check the fluid level regularly and
add distilled water as required so that the fluid
level is between the UPPER and LOWER levels.

To avoid personal injury or death:
A Never remove the vent caps while the engine is

running.

A Keep electrolyte away from eyes, hands and

clothes. If you are spattered with it, wash it
away completely with water immediately and
get medical attention.

A Wear eye protection and rubber gloves when

working around the battery.

A Before inspection or dismounting the battery,

be sure to turn off the engine and turn the
starter switch to the "OFF" position.

A When removing the battery, always disconnect

the negative ground cable first. When installing
a battery, always connect the ground cable
last. This prevents a possible explosion caused
by sparks.

A Always wear eye protection when working with

the battery.

In case of non-refillable type, if the indicator turns
white, do not quick charge the battery but replace it
with new one.

Mishandling the battery shortens the service life and adds
to maintenance costs.
A non-refillable type battery is maintenance free, but
needs some servicing.
If the battery is weak, the engine will be difficult to start
and the lights will be dim. It is important to check the
battery periodically.

(1) Battery
(2) Indicator

C How to read the indicator

Check the battery condition by reading the indicator.

State of indicator display

Green

Specific gravity of electrolyte and quality of
electrolyte are both in good condition.

Black Needs charging battery.

(A) "Upper level"
(B) "Lower level"

White Needs replacing battery.

65REGULAR CHECKS AND MAINTENANCE WORK

C Battery Charging

To avoid personal injury or death:
A When the battery is being activated, hydrogen

and oxygen gases in the battery are extremely
explosive. Keep open sparks and flames away
from the battery at all times, especially when
charging the battery.

A When charging the battery, remove battery

vent plugs. (if equipped)

A When disconnecting the cable from the battery,

start with the negative terminal first.
When connecting the cable to the battery, start
with the positive terminal first.

A Never check battery charge by placing a metal

object across the posts.
Use a voltmeter or hydrometer.

Battery Type Volts (V) Capacity

GP24 (80D26R) 12 55 (at 5H.R(A.H))

Reserve

Battery Type

GP24 (80D26R) 133 582 6.5

C Direction for Storage

1. When storing the machine for long periods of time,
remove the battery from machine, adjust the
electrolyte to the proper level and store in a dry place
out of direct sunlight.

2. The battery self-discharges while it is stored.
Recharge it once every three months in hot seasons
and once every six months in cold seasons.

Capacity

(min)

Cold

Cranking

Amps

Normal

Charging

Rate (A)

BGreasing Swing Bearing Teeth

1. Pump grease with the grease gun through the grease
fitting.

2. Grease at each 90 (1.58 rad.) position of the swing
frame.

3. Fill with approx. 50g of grease (approx. 20 to 30
pumps with the grease gun at each position).
Distribute the grease over the teeth.

(1) Battery

1. To slow charge the battery, connect the battery
positive terminal to the charger positive terminal and
the negative to the negative, then recharge in the
standard fashion.

2. A boost charge is applied only to refillable type and is
only for emergencies. It will partially charge the battery
at a high rate and in a short time.
When using a boost-charged battery, it is necessary to
recharge the battery as early as possible.
Failure to do this will shorten the battery's service life.

3. The battery is charged if the indicator display turns
green from black.

4. When exchanging an old battery for a new one, a
battery of equal specification.

(1) Grease fitting (for swing bearing teeth)

REGULAR CHECKS AND MAINTENANCE WORK66

EVERY 200 SERVICE HOURS

Do all 50 and 100 hour servicing at the same time.

BAdjusting V-belt Tension

To avoid personal injury or death:

A First stop the engine and remove the key.
A After servicing, make sure to replace the belt

cover in its original position.

C Checking and adjustment of the air-conditioner

belt tension

1. Press the air-conditioner belt in the middle, with a force
of approx. 58.8 to 68.6 N (6 to 7 kgf). The belt tension
is correct if it deflects about 12 to 15 mm. If otherwise,
loosen nut of the tension pulley and the bolt of the
tension pulley, then adjust tension pulley in the
direction shown by the arrow.

2. Replace the air-conditioner belt if worn out, cracked or
torn.

C Checking and adjustment of the fan belt tension

1. Press the fan belt in the middle, with a force of approx.

58.8 to 68.6 N (6 to 7 kgf). The belt tension is correct
if it deflects about 9 to 11 mm. When adjusting the fan
belt, loosen the lock nuts and turn the tension bolt in
counterclockwise direction.

2. Replace the fan belt if worn out, cracked or torn.
When replacing the fan belt, loosen the tension pulley
(8) and alternator (2).

(1) Fan belt
(2) Alternator
(3) Pulley
(4) Fan pulley
(5) Lock nut
(6) Lock nut
(7) Tension bolt
(8) Tension pulley

(A) 9 to 11 mm

(1) Air-conditioner belt
(2) Tension pulley
(3) Air-conditioner compressor
(4) Pulley
(5) Bolt

(A) 12 to 15 mm
(B) Tighten

A If the engine is run with a loose fan belt, the belt could

slip and cause overheating of the engine. Check fan
belt tension regularly.

A If the engine is run with a loose fan belt, the belt could

slip and cause insufficient battery charging. Check fan
belt tension regularly.

A Should the fan belt break or jump off, the indicator light

for battery charge will light up. Stop the engine and
remove the key immediately.

BChecking Radiator Hoses and Clamps

To avoid personal injury or death:
A Wait long enough for the radiator coolant to

cool down.

67REGULAR CHECKS AND MAINTENANCE WORK

BInspection and Cleaning Air Filter Element

Open the engine hood and remove the dust-cover. Take
out only outer element, clean the element, case interior
and reassemble. During reassembly, take care to install
the dust-cover so that its TOP mark (arrow) faces up­wards. Do not remove the inner element.

Check the coolant hoses for proper connection. This
check should be carried out every 200 hours or every 6
months, whichever comes first.

1. Should the hose clamps become loose or coolant
leaks, tighten the hose clamps properly.

2. Should the radiator hoses become swollen, aged or
cracked, they must be replaced and the hose clamps
tightened again properly.

(1) Hose clamp (2) Radiator hose

A Should the machine be used in extremely dusty areas,

the air filter element must be inspected and cleaned
more frequently than in the specified maintenance
periods.

A The air filter has a dry element, keep free from oil.
A Do not run the engine without the air filter.

(1) Inner element
(2) Outer element
(3) Dust-cover
(4) Clamps

BGrease Swing Ball Bearing

1. Grease through the respective grease fitting. (at the
central fitting)

2. Grease at each 90 (1.58 rad.) position of the swing
frame.
Using the grease gun, apply 5 shots at every position.

(1) Grease fitting

REGULAR CHECKS AND MAINTENANCE WORK68

BAir Filter Maintenance

To avoid personal injury or death:
A Wear eye protection.

The quickest and safest method of maintenance is the
exchange of the paper cartridge. Furthermore there are
different methods of cleaning the cartridge.

BChecking Fuel Line and Intake Air Line

1. Check to see that all lines and hose clamps are
tightened and not damaged.

2. If hoses and clamps are found worn or damaged,
replace or repair them at once.

(1) Fuel lines
(2) Clamp bands

C Cleaning with compressed air

Pressure of compressed air must be under 205 kPa (2.1
kgf/ ), and the cartridge should be blown clean from the
inside to the outside until the dust deposits are noticeably
reduced.

A If the air suction is still inadequate, or the color of the

exhaust gases is abnormal even after the cleaning, the
air filter cartridge must be replaced.

(1) Hoses
(2) Hose clamps

AIR CONDITIONER

BCleaning Air Filter

Open the cover and remove the filter cover, remove the air
filter.

(1) Air filter

To avoid personal injury or death:
A Wear eye protection.

69REGULAR CHECKS AND MAINTENANCE WORK

(1) Filter (A) "AIR CONDITIONER AIRFLOW"

A Pressure of compressed air must be under 205 kPa

(2.1 kgf/ ).

A If the filter is very dirty, replace the air filter.

BChecking Air-Conditioner Condenser

Check air conditioner condenser to be sure it is clean from
debris.

C Cleaning the air filter
A Normal use

Blow air from the opposite direction to the filter's
normal air flow.

A Do not hit the filter. If the filter becomes deformed, dust

may enter into the air-conditioner, which may cause
damage and malfunction.

(1) Air conditioner condenser

REGULAR CHECKS AND MAINTENANCE WORK70

EVERY 250 SERVICE HOURS

Do all 50 hour servicing at the same time.

BChanging Engine Oil (First Engine Oil

Change after 50 Service Hours)

To avoid personal injury or death:
A First stop the engine then remove the key and

wait long enough for the oil to cool down.

1. Remove the drain plug on the underside of the engine
and drain all oil.

2. Re-tighten the drain plug.

4. Let the engine idle for approx. 5 min. Check the engine
oil level. To check the engine oil level, insert the
engine oil dipstick completely into the respective port
opening and pull out again. If the oil level lies between
both markings, no oil must be added.

A Regardless of the service hours, an engine oil change

is due every 1 year.

Engine oil volumes

(with engine oil filter)

5.3 L

BReplacing Engine Oil Filter Cartridge

(First Engine Oil Filter Change after 50
Service Hours)

1. Replace the oil filter cartridge at the same time as
doing the engine oil change.

2. Remove the cartridge with the supplied filter wrench.

(1) Drain plug

3. Fill up with new oil through the filling port to the
specified level.

(1) Engine oil dipstick
(2) Oil filling port

(A) Required oil level range

(1) Oil filter cartridge

3. Oil the O-ring of the new oil filter cartridge lightly. Then
tighten the oil filter cartridge by hand.

4. Fill engine oil to the specified level.

5. Let the engine run for approx. 5 min. and make sure
that the engine oil indicator lamp does not light up.
Then stop the engine and remove the key.

6. The engine oil level is reduced by the amount of the
filter capacity after the engine is started. It is usually
necessary to add oil.

A Always check the oil level after having exchanged the

filter.

71REGULAR CHECKS AND MAINTENANCE WORK

EVERY 500 SERVICE HOURS

Do all 50, 100 and 250 hour servicing at the same time.

BDrive unit Oil Change(First Oil Change of

the 50 hours)

To avoid personal injury or death:
A Lower all attachments to the ground, stop the

engine and remove the key before undertaking
the oil change.

1. Rotate the track so that the drain plug of the drive unit
is in the bottom position.

2. Remove the drain plug to let the oil run out. Screw in
and tighten the drain plug again and fill with gear oil
through the oil check port.

3. Fill oil until it overflows out of the oil check port.

Oil change

- first oil change after 50 hrs

- then every 500 hrs

- or at least once a year

4. Use prescribed gear oil SAE 90.

BReplacing Fuel Filter Cartridge

To avoid personal injury or death:
A Keep fire away.

1. Remove the filter with the filter wrench.

2. Apply a light film of fuel to the seal of the new filter and
turn in tightly by hand.

3. Open the shutoff-valve of the fuel filter again.

(1) Fuel filter cartridge

(1) Oil check port
(2) Drain plug
(3) Oil filling port

Gear oil volume approx. 0.6 L

A After exchange of the filter, the fuel system must be

purged of air.

REGULAR CHECKS AND MAINTENANCE WORK72

BReplacing Hydraulic Return Filter Element

(First replacement after 250 service
hours)

To avoid personal injury or death:
A Remove the oil filter element only after the oil in

the hydraulic tank has cooled down.

(1) Set bolt
(2) Filter support

(3) Return filter
(4) Cover

EVERY 1000 SERVICE HOURS

Do all 50, 100, 200, 250 and 500 hour servicing at the
same time.

BReplacing the Hydraulic Pilot Filter

Element

To avoid personal injury or death:
A Before replacing the element, wait long enough

for the hydraulic fluid to cool down.

1. Remove the bonnet left cover.

2. Gradually loosen the oil filling plug on the tank to
release the pressure in the hydraulic system.

3. Remove the pilot filter case from the head cover.

4. Wrench and pull out the element downward.

5. Replace the O-ring with a new one.

6. Apply a light coating of clean hydraulic oil to the O-ring
and fit it to the case firmly. Be careful not to scratch the
O-ring.

7. Fit the case to the head cover.

8. Let the engine run for approx. 3 minutes.

9. Check the oil level of hydraulic oil tank, then tighten the
oil filling plug.

1. Remove the cover of the hydraulic tank.

2. Pull out the filter support by the top plate from the
hydraulic tank.

3. Remove the return filter from the filter support with a
fork wrench and exchange the filter.

A Always check the oil level when replacing the filter.

BReplacing Breather Filter

See "Replacing Hydraulic Return Filter Element" in
"EVERY 500 SERVICE HOURS" section.

BReplacing Fan Belt

Consult your local KUBOTA dealer for this service.

(1) Bonnet left cover

(1) Head cover (2) Element (3) O-ring (4) Case

BHydraulic Oil Change (Including

Replacing of the Suction Filter in the
Hydraulic Tank)

To avoid personal injury or death:
A Wait long enough for the hydraulic fluid to cool

down. Then begin with the change of the
hydraulic fluid.

1. Park the excavator on a firm, flat and level surface.
Lower the attachments and dozer blade to the ground
and stop the engine.

73REGULAR CHECKS AND MAINTENANCE WORK

(1) Set bolt
(2) Filter support
(3) Return filter
(4) Cover

6. Fill oil through the oil filling opening on the top side of
the tank.

7. let the engine run for approx. 5 min. and check the oil
lever again.

(5) Suction filter
(6) Drain plug
(7) Bolt
(8) Breather filter

2. Remove the drain plug on the underside of the
hydraulic tank and drain the oil.

(1) Drain plug

3. Remove the cover of the hydraulic tank.

4. With a fork wrench or similar, remove and replace the
filter with new one.

5. Retighten the drain plug, and remove iron powder
adhering to the magnet.

A Should dirt deposits be in the hydraulic tank , remove

with the help of a clean cloth and light oil.

Hydraulic tank 35 L

Hydraulic oil volumes

Whole oil
volumes

61 L

REGULAR CHECKS AND MAINTENANCE WORK74

BHydraulic Oil Check with Hydraulic

Hammers

The hydraulic oil change after 1000 operating hours in the
operator's manual is based on normal excavator work.
Following inspection measures are valid when hydraulic
hammers are used:

1. Changing and filling up of hydraulic oil
(1) The hydraulic oil must be changed more often

when hammers are used because the machine is
subject to harder conditions than normal
excavating work.

(2) Use only the recommended oils mentioned in the

operator's manual when changing or filling with
oil.

(3) When filling up oil, do not mix oils of different

makes.

2. Changing the return filter and oil
(1) The filter must be changed more often because of

contamination resulting from the frequent

assembly and disassembly of the hoses.
(2) Use the correct replacement filter.
(3) Oil change according to operating hours.

Normal
excavator work

20%

Hammer
work
portion

40%

60%

Hydraulic

oil

every 1000

Hrs.

every 800

Hrs.

every 400

Hrs.

every 300

Hrs.

Return

filter

every 500

Hrs.
(250 Hrs.
after first

operation)

every 400

Hrs.

every 200

Hrs.

every 150

Hrs.

Suction

Filter

every 1000

Hrs.

EVERY 1000 SERVICE HOURS OR ONCE A
YEAR

BReplacing Air Filter Element

Open the engine hood and remove the dust-cover.
Remove and replace the outer element and inner element
with new elements.
When reassembling, install the dust-cover so that its TOP
mark (arrow) faces up-wards.

(1) Inner element
(2) Outer element
(3) Dust-cover
(4) Clamps

A Shorten the replacement period if the machine is used

in dusty or sandy areas.

EVERY 1500 SERVICE HOURS

BChecking Fuel Injection Nozzle (Injection

Pressure)

Consult your local KUBOTA dealer for this service.

more

every 200

Hrs.

every 100

Hrs.

EVERY 2000 SERVICE HOURS

Do all 50, 100, 200, 250, 500 and 1000 hour servicing at
the same time.

BChanging Front Idler and Track Roller Oil

A Contact your KUBOTA dealer for details.

BChecking the Alternator and Starter Motor

A Contact your KUBOTA dealer for details.

EVERY 3000 SERVICE HOURS

BChecking Injection Pump

Consult your local KUBOTA dealer for this service.

75REGULAR CHECKS AND MAINTENANCE WORK

ANNUAL SERVICING

BElectrical Wiring and Fuses

Check the terminals periodically for proper connections.
Loose wiring or damaged cables can cause improper
functioning or short circuiting of the electrical system.
Check wiring and replace damaged components
immediately. If a fuse blows out soon after having been
replaced, contact your nearest KUBOTA dealer. Never
use a fuse other than specified.

BChecking the Electrical Circuit

Check the electrical circuitry for disconnections, shorts or
loose terminals.

BChecking Air-Conditioner Pipes and

Hoses

To avoid personal injury or death:
A Do not touch the coolant hoses or the heater

with your hand. You may get burned.

BReplacement of Radiator Hoses and Hose

Clamps

Replace radiator hoses and hose clamps every two years.
If the hoses are swollen, hard or cracked, they must be
replaced earlier.

(1) Hose clamp
(2) Radiator hose

BChanging Radiator Coolant

1. Check to see that all lines and hose clamps are tight
and not damaged.

2. If hoses and clamps are found worn or damaged,
replace or repair them at once. (Consult your local
KUBOTA dealer for this service.)

BIENNIAL SERVICING

To avoid personal injury or death:
A Do not loosen the radiator cap before the

radiator has cooled down sufficiently. Only
loosen the cap after allowing enough time for
the pressure in the system to be reduced.
Thereafter, one can remove the cap completely.

BReplacing Air-Conditioner Pipes and

Hoses

To avoid personal injury or death:
A Do not touch the coolant hoses or the heater

with your hand. You may get burned.

Replace air-conditioner pipes and hoses every two years.
If the hoses or pipes are swollen, hard or cracked, they
must be replaced earlier. (Consult your local KUBOTA
Dealer for this service.)

To avoid personal injury or death:
A When using anti-freeze, use protective clothing

such as rubber gloves (Anti-freeze is
poisonous.).

A If you accidentally swallowed anti-freeze, seek

medical attention at once.

A When anti-freeze comes in contact with the

skin or clothing, wash it off immediately.

A Do not mix different types of Anti-freeze. The

mixture can produce a chemical reaction
causing harmful substances.

A Anti-freeze is extremely flammable and

explosive under certain conditions. Keep fire
and children away from anti-freeze.

A When draining fluids from the engine, use a

container underneath the engine body to catch
the fluids.

A Do not pour waste onto the grounds, down a

drain, or into any water source.

A Also, observe the relevant environmental

protection regulations when disposing of anti­freeze.

A If swallowed, anti-freeze is poisonous to

people, animals and birds.

REGULAR CHECKS AND MAINTENANCE WORK76

Stop the engine, then remove the key and wait until it has
cooled down completely.

1. Open the drain plug on the bottom of the radiator and
drain coolant completely. Should a recovery tank be
equipped, disconnect the line from the tank floor and
then open the drain shutoff-valve.

2. To clean, rinse the radiator with water.

3. Close the drain plug, and fill the radiator and the
recovery tank with coolant fluid. Let the engine idle for
about 5 min. Stop the engine and remove the key.

4. Check the coolant level of recovery tank and add the
coolant if necessary.

5. The shipped machine has been filled with 50% anti­freeze solution.

(1) Recovery tank (A) "FULL"

(B) "LOW"

(1) Drain plug

Cooling water

Canopy Approx. 4.3 L

Cabin Approx. 4.7 L

Radiator
recovery tank

Approx. 0.85 L

A Do not operate the engine without coolant.
A To fill the radiator system and the recovery tank, use

fresh water and anti-freeze fluid.

A When the anti-freeze is mixed with water, the anti-

freeze mixing ratio must be less than 50%.

A Tighten the radiator cap properly. If the cap is loosely

or not properly fitted, overheating of the engine can
result due to coolant fluid loss.

BReplacing Fuel Hoses and Hose Clamps

Replace the hoses and clamps.
(See "Checking Fuel Line and Intake Air Line" in "EVERY
200 SERVICE HOURS")

(1) Radiator cap

(1) Fuel lines
(2) Clamp bands

BReplacing Intake Air line

Replace the hoses and clamps, if necessary.
(See "Checking Fuel Line and Intake Air Line" in "EVERY
200 SERVICE HOURS")

77REGULAR CHECKS AND MAINTENANCE WORK

A shortage of refrigerant reduces the air-conditioner
performance. Check the following points. If it is indicated
that the amount of refrigerant is extremely low, ask your
dealer to inspect and charge.

C Checking procedure

1. Run the air-conditioner in the following conditions.

A Engine speed: About 1500 rpm

A Temperature control lever: Maximum cooling

position (rightmost)

A Fan switch: Highest blow (3)

A Air-conditioner switch: ON

2. Look into the sight glass to see if the refrigerant is
flowing through its circuit.

(1) Hoses
(2) Hose clamps

SERVICING AS REQUIRED

BChecking Amount of Refrigerant (gas)

To avoid personal injury or death:
A Liquid contact with eyes or skin may cause

frostbite.

A In the event of a leakage, wear safety goggles.

Escaping refrigerant can cause severe injuries
to eyes.

A In contact with a flame, R134a refrigerant result

in a toxic gas.

A Do not disconnect any part of the

refrigeration circuit of the air conditioning
system. Consult your local KUBOTA Dealer for
assistance and service.

(1) Sight glass

A Charge only with R134a not R12 refrigerant (gas).

78 OTHER ADJUSTMENTS AND REPLACEMENTS

OTHER ADJUSTMENTS AND REPLACEMENTS

PURGING OF THE FUEL SYSTEM

1. Fill up the fuel tank with fuel.

2. Turn the starter key to the position "RUN".

3. The air in the fuel system will automatically be purged
within one minute.

(1) Starter switch (A) "STOP"

(B) "RUN"
(C) "START"

After adjustment is completed:

Using the socket wrench, tighten the grease fitting.
Tightening torque must be between 98 to 108 N-m.

A If the tracks are too tight, wear is increased.
A If the tracks are too loose, the track pads may collide

with the sprocket and wear is increased.
The track may dislocate or come off.

A Clean the track after every use.
A Should the track tension be high due to sticking mud,

lift the track with the help of the boom, arm and bucket,
idle the engine and remove mud from the track by
rotating it.

C Tense the tracks as specified:

1. Loosen the bolt and remove the cover.

2. Apply grease to the grease fitting.

A If the purging was insufficient, the engine stops right

after starting. In this case repeat steps 2 to 3 again.

ADJUSTMENT OF TRACKS

C To loosen the tracks, follow the following

procedure:

To avoid personal injury or death:
A Do not loosen the grease fitting completely or

too quickly. Otherwise grease under high
pressure in the tension cylinder could squirt
out.

A Do not crawl under the excavator.

1. Loosen the bolts and remove the cover.

2. Using a socket wrench, loosen the grease fitting a few
turns.

3. When grease oozes out from the thread, rotate the
track and loosen the track in the lifted position (see
illustration).

(1) Cover
(2) Bolt
(3) Grease fitting
(4) Grease gun

3. Rubber Tracks
Tense the track in the lifted position, so that the
distance "A" (clearance between the track roller and
the inside surface of the track) see illustration, in this
case, if there is a seam mark " " on the inside
surface of the track, the seam mark " " is positioned
on the top center between the idler and the sprocket.