Kubota u25 Operator's Manual

U.S.A. :KUBOTATRACTORCORPORATION

WesternDivision :

CentralDivision :

NorthernDivision :

SoutheastDivision :

Canada :KUBOTACANADALTD.

France :KUBOTAEUROPES.A.S

Italy :KUBOTAEUROPES.A.SItalyBranch

Germany :KUBOTABAUMASCHINENGmbH

U.K. :KUBOTA(U.K.)LTD.

Australia :KUBOTATRACTORAUSTRALIAPTYLTD.

Malaysia :SIMEKUBOTASDN.BHD.

Philippines :KUBOTAPHILIPPINES,INC.

Taiwan :SHINTAIWANAGRICULTURALMACHINERYCO.,LTD.

Thailand :SIAMKUBOTACORPORATIONCO.,LTD.

Japan :KUBOTACorporation

3401

DelAmoBlvd.,Torrance,CA

Telephone:(

Telephone :(

Telephone :(

Telephone :(

Telephone :(

590014
Telephone:(

19-25
Telephone:(

ViaGrandi,
Telephone:(

Steinhauserstr,
Telephone:(

DormerRoad,Thame,Oxfordshire,OX
Telephone:(

25-29
Telephone:(

3

JalanSepadu25/

No.
Seksyen
Telephone:(

232

QuirinoHi㷅hway,Baesa,QuezonCity

Telephone:(

16

,Fen㷅pin㷅2ndRd,TaliaoShian㷅Kaohsiun㷅

Telephone:(

101/19-24
Pathumthani
Telephone:(

Farm&IndustrialMachineryInternationalOperationsHeadquarters
2-47

,Shikitsuhi㷅ashi1-chome,Naniwa-ku,Osaka,Japan

310)370-3370

1175

S.GuildAvc.,Lodi,CA

209)334-9910

14855

FAABlvd.,FortWorth,TX

817)571-0900

6300

atOneKubotaWay,Groveport,OH

614)835-1100

1025

NorthbrookParkway,Suwanee,GA

770)995-8855

thAvenue,Markham,Ontario,L3S4K4,Canada

905)294-7477

,RueJulesVercruysse,Z.I.BP88,

33)1-3426-3434

2920068

PermasWay,Tru㷅anina,VIC

25,40400

Moo20,NavanakornIndustrialEstate,TambonKhlon㷅nuen㷅,AmphurKhlon㷅luan㷅,

PeschieraBorrome(MI)Italy

39)02-51650377

100,66482

49)6332-4870100

44)1844-214500

61)-3-9394-4400

123

ShahAlam,Selan㷅orDarulEhsanMalaysia

60)3-736-1388

63)2-422-3500

886)7-702-2333

12120

,THAILAND

66)2-909-0300

90503

,U.S.A.

95240

76155

95101

Ar㷅enteuilCedex,France

ZweibruckenRheinlandpfalzGermany

93

UN,U.K.

3029

,Australia

TamanPerindustrianAxis,

1106

,Philippines

83107

43125

30024

,TaiwanR.O.C.

556-8601

ABBREVIATION LIST

Abbreviations Definitions

AI Auto Idle

API American Petroleum Institute

ASTM American Society for Testing and Materials, USA

CECE Committee for European Construction Equipment

DIN German Institute for Standards, Federal Republic of Germany

EN European Standard

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

Hi High speed

ISO International Standardization Organization

JIS Japanese Industrial Standard

L Volume (Liter)

L/min Liter per minute

Lo Low speed

MIL Military Standards

OPG Operator Protective Guards

OSHA Occupational Safety & Health Administration

rpm Revolutions per minute

ROPS Roll-Over Protective Structures

SAE Society of Automotive Engineers, USA

TPSS Two Pattern Selection System

California Proposition 65

WARNING

Engine exhaust, some of its constituents,
certain vehicle components and fluids,
contain or emit chemicals known to the
State of California to cause cancer and birth
defects or other reproductive harm.

IMPORTANT

The engine in this machine is not equipped by the manufacturer
with a standard spark arrester.
It is a violation of California Public Resource Code Section 4442 to
use or operate this engine on or near any forest-covered, brush­covered land, or grass- covered land unless the exhaust system is
equipped with a working spark arrester meeting state laws. Other
states or federal areas may have similar l

aws.


 
    

GENERAL SYMBOLS

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

Safety alert Symbol

Alarm lamp “Fuel level too low”

Alarm lamp “Engine Oil pressure “

Alarm lamp “Battery charge”

Horn

Diesel

Hydraulic fluid

Fast

Slow

Excavator - Overhead movement toward the front

Excavator - Overhead movement toward the rear

Boom raise

Boom swing (left)

Boom swing (Right)

Dozer raise

Dozer lower

Operation direction of control lever

Operation direction of control lever

Read operator’s manual

Lock

Unlock

Boom lower

Arm out

Arm in

Bucket in

Bucket dig / rollback

FOREWORD

SAFETY FIRST

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.

DANGER :

WARNING :

CAUTION :

IMPORTANT :

NOTE : Gives helpful information.

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.

CONTENTS

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

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

TECHNICAL DATA...................................................................................................... 2

DESCRIPTION OF MACHINE PARTS........................................................................ 3

INSTRUMENT PANEL AND CONTROL ELEMENTS................................................. 4

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

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

SLIDING THE SEAT ................................................................................................ 7

OPENING AND CLOSING OF PARTS.................................................................... 8

Opening / Closing of the Engine Hood .............................................................................8

Opening and Closing of the Fuel Tank Cover...................................................................8

Keeping the Tools.............................................................................................................9

Operator's Manual Storage...............................................................................................9

HANDLING THE SAFETY DEVICES....................................................................... 9

Control Lever Lock............................................................................................................9

Roll-Over Protective Structures (ROPS) / Operator Protective Guards of Top Guard Level

I (OPG (Top Guard Level I)) ...........................................................................................10

OPERATION OF THE ENGINE................................................................................. 11

STARTING THE ENGINE ...................................................................................... 11

Display Selector Switch .................................................................................................. 12

Battery Charge Lamp...................................................................................................... 14

Engine Oil Pressure Warning Lamp ...............................................................................14

Glow Lamp......................................................................................................................15

LCD Display for Normal Operation ................................................................................. 15

LCD Display for Warning ................................................................................................16

Warning Lamp ................................................................................................................17

Checkpoints after Starting the Engine ............................................................................17

STARTING THE ENGINE UNDER COLD CONDITIONS...................................... 18

STOPPING THE ENGINE...................................................................................... 18

Engine Stop Lever ..........................................................................................................18

STARTING WITH AN AUXILIARY BATTERY ....................................................... 18

Observe Following Guidelines when Starting with an Auxiliary Battery..........................19

EXCAVATOR OPERATION ...................................................................................... 20

RUNNING-IN OF THE NEW EXCAVATOR........................................................... 20

Do not Work with Full Engine Rpm's or Full Loads during the First 50 Working Hours.. 20

Oil Change in the Run-in Stage...................................................................................... 20

Seat Belt .........................................................................................................................20

STARTING ............................................................................................................. 20

Adjusting the Operator's Seat.........................................................................................20

Lock Lever ......................................................................................................................21

Working Light Switch ......................................................................................................21

Travel Buzzer (Option)....................................................................................................21

TWO PATTERN SELECTION SYSTEM (TPSS) ................................................... 22

CONTENTS

Pattern Change............................................................................................................... 22

OPERATION OF THE BOOM................................................................................ 23

OPERATION OF THE ARM................................................................................... 23

OPERATION OF BUCKET .................................................................................... 24

SWIVEL(UNIT SWING)OPERATION .................................................................... 24

BOOM SWING OPERATION................................................................................. 24

OPERATION OF THE DOZER .............................................................................. 24

SERVICE PORT OPERATION .............................................................................. 25

DRIVING ................................................................................................................ 25

Drive Levers (Right, Left)................................................................................................26

Travel Speed Switch.......................................................................................................26

TURNS................................................................................................................... 27

Pivot Turn ....................................................................................................................... 27

Spin Turn ........................................................................................................................28

UP AND DOWNHILL TRAVELLING ...................................................................... 28

PARKING ON A SLOPE ........................................................................................ 29

IMPORTANT INFORMATION ON EXCAVATOR OPERATION ............................ 29

TRANSPORTING THE EXCAVATOR ON A TRUCK................................................ 30

LIFTING OF THE EXCAVATOR................................................................................ 32

MAINTENANCE......................................................................................................... 34

MAINTENANCE INTERVALS ................................................................................ 34

DAILY CHECKS..................................................................................................... 37

Check Fuel Level............................................................................................................37

Check Engine Oil Level ..................................................................................................38

Check Hydraulic Oil Level...............................................................................................38

Checking Coolant Level..................................................................................................39

Washing Whole Machine................................................................................................ 39

Lubrication Points ........................................................................................................... 39

Check Fan Belt ...............................................................................................................40

Cleaning of Engine and Electrical Wiring........................................................................40

Check Radiator and Oil cooler........................................................................................40

REGULAR CHECKS AND MAINTENANCE WORK ................................................. 41

EVERY 50 SERVICE HOURS ............................................................................... 41

Draining the Water from the Fuel Tank...........................................................................41

Draining Water Separator............................................................................................... 41

Battery ............................................................................................................................ 42

Battery Charging.............................................................................................................43

Greasing of Swing Bearing Teeth...................................................................................43

EVERY 200 SERVICE HOURS ............................................................................. 44

Checking Fan Belt Tension.............................................................................................44

Checking Radiator Hoses and Clamps...........................................................................44

Inspection and Cleaning Air Filter Element.....................................................................45

Air Filter Maintenance..................................................................................................... 45

Greasing Swing Bearing................................................................................................. 45

Checking Fuel Line and Intake Air Line ..........................................................................46

EVERY 250 SERVICE HOURS ............................................................................. 46

Lubrication of the Pilot Valve .......................................................................................... 46

EVERY 500 SERVICE HOURS ............................................................................. 46

CONTENTS

Changing Engine Oil (Change the engine oil every 500 hours, or every 1 year in the case

that service hour is less than 500 hours)........................................................................46

Replacing Engine Oil Filter Cartridge (Replace the engine oil filter every 500 hours, or

every 1 year in the case that service hour is less than 500 hours)................................. 47

Drive Unit Oil Change (First Oil Change of the 100 hours).............................................48

Replacing Fuel Filter Cartridge....................................................................................... 48

Replacing Hydraulic Return Filter Element (First replacement after 250 service hours) 49

EVERY 1000 SERVICE HOURS ........................................................................... 49

Cleaning of the Pipe filter of the Hydraulic Pilot System (for Hydraulic Pilot Types) ...... 49

Replacing the Hydraulic Pilot Filter Element...................................................................49

Hydraulic Oil Change (Including Replacing of the Suction Filter in the Hydraulic Tank) 50

Hydraulic Oil Check with Hydraulic Breakers .................................................................51

EVERY 1000 SERVICE HOURS OR ONCE A YEAR ........................................... 51

Replacing Air Filter Element ...........................................................................................51

EVERY 1500 SERVICE HOURS ........................................................................... 51

Checking Fuel Injection Nozzle (Injection Pressure) ...................................................... 51

EVERY 2000 SERVICE HOURS ........................................................................... 51

Changing Front Idler and Track Roller Oil ......................................................................51

Checking the Alternator and Starter Motor .....................................................................51

EVERY 3000 SERVICE HOURS ........................................................................... 51

Checking Injection Pump................................................................................................51

ANNUAL SERVICING............................................................................................ 52

Electrical Wiring and Fuses ............................................................................................52

Checking the Electrical Circuit ........................................................................................52

BIENNIAL SERVICING .......................................................................................... 52

Replacement of Radiator Hoses and Hose Clamps ....................................................... 52

Changing Radiator Coolant ............................................................................................52

Replacing Fuel Hoses and Hose Clamps.......................................................................53

Replacing Intake Air line.................................................................................................53

OTHER ADJUSTMENTS AND REPLACEMENTS.................................................... 54

PURGING OF THE FUEL SYSTEM ...................................................................... 54

ADJUSTMENT OF TRACKS ................................................................................. 54

Special Information when Using Rubber Tracks.............................................................55

CHANGING THE BUCKET .................................................................................... 56

FUSES ................................................................................................................... 56

Replacing Fuses............................................................................................................. 56

Fuse Capacities and Circuits.......................................................................................... 56

Slow Blow Fuse ..............................................................................................................56

TROUBLESHOOTING............................................................................................... 57

KUBOTA I.C.S. NAVIGATION LIST OF ERROR CODE ....................................... 58

OPERATION UNDER COLD WEATHER CONDITIONS .......................................... 63

PREPARATION FOR OPERATION IN COLD WEATHER .................................... 63

PROCEDURE AFTER DONE WORK.................................................................... 63

LONG STORAGE ...................................................................................................... 64

RECOMMENDED OILS............................................................................................. 66

MAIN DIMENSIONS .................................................................................................. 68

LIFTING CAPACITY .................................................................................................. 69

SAFE OPERATION

The best insurance against accidents is to abide by the
safety regulations.

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

Every user, however experienced, should carefully read
and understand this section and those of the attachments
and accessories before taking the excavator into
operation. The owner is obliged to inform the operators of
these instruction in detail.
Keep this manual in the storage place. (See "Operator's
Manual Storage" in "CHECKS BEFORE START" section.)

1. BEFORE OPERATION

1. Make yourself acquainted with the excavator and be
aware of its limits. Read the operating instructions
carefully before starting the excavator.

2. 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).
Do not modify structural members of ROPS 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 ROPS
is loosened or removed for any reason, make sure all
parts are reinstalled correctly. Tighten mounting bolts
to proper torque.

4. The seat belt must be inspected regularly and
replaced if damaged.

-1SAFE OPERATION

(1) Seat belt

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

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

A Engage the lever lock to prevent accidental pattern

change.

(1) Pattern selector lever
(Two Pattern Selection System: TPSS)
(2) Lever lock knob

SAFE OPERATION-2

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

8. 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.
A Check for hidden holes, hindrances, soft underground,

and overhangs.

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

(7) Straw hat
(8) Towel
(9) Baggy trousers
(10) Loose cuffs of the shirt
(11) Baggy shirt
(12) Rubber sandals

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

12.Check mechanical parts for correct adjustments and
wear.

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

14.Use only KUBOTA authorized attachments.

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

16.Do not modify the excavator, otherwise it could lead to
unforeseen safety problems.

17.Do not hammer anything that is above the operator's
seat level. Objects may fall into the operator station of
mini-excavator from front.

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

A During excavator use, do not allow any persons within

the working range.

9. Do not allow other persons to use the machine before
having informed him on the exact operation and work
instructions, and be assured that the operator's
manual has been read and completely understood.

10.Do not wear baggy, torn or oversized clothing when
working with the excavator. 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.

2. STARTING OF THE EXCAVATOR

1. Get into and out of the machine safely. Always face the
machine. Always use handrails and available steps
and keep yourself well balanced. Do not 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 lock levers
are in position "Lock" 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. Make sure that the dozer blade is in front of you. (The
dozer blade must be raised.) If the levers are activated
with the dozer blade at the rear, the tracks will move in
the opposite direction of the drive levers.

5. Do not operate or idle engine in a non-ventilated area.
Carbon monoxide gas is colorless, odorless, and
deadly.

-3SAFE OPERATION

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

7. Precautions against tipping over. Keep away from
steep slopes and embankments. Do not swing the
bucket downhill. Lower the dozer blade during 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 away due to the weight of
the excavator.
ALLOWABLE CLIMBING ANGLE : 36 % (20 deg.)
ALLOWABLE ANGLE IN CASE OF CROSSING
SIDEWAY : 27 % (15 deg.)

8. Watch out at all times for the area to which the
excavator is being moved.
Pay attention to any hindrances.

9. Keep enough distance from trench and bank edges.

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.

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.

8. When parking your machine, if at all possible, park on
a firm, flat and level surface; if not, park across a slope.
Lower the bucket and dozer to the ground, remove the
key, place the control lock levers in the locked position
from the ignition and lock the cab door (if equipped),
before you leave.

SAFE OPERATION-4

3. AFTER OPERATION

Before leaving the machine,

A Park the excavator on a firm, flat and level surface.
A Lower the attachments and the dozer blade to the

ground.

A Stop the engine.
A Release pressure trapped in the hydraulic system.
A Lock all control levers.
A Remove the key.

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 a
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.
After loading the excavator on the truck, block the
tracks with blocks and cable down the excavator.

(1) Lock lever for control lever (A) "Unlock"

(B) "Lock"

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

6. If the excavator is to tow another machine, make sure
the load is smaller than the strength of the hook, tow
chain or cable.

Max. drawbar pull at
coupling hook

Max. vertical load at
coupling hook

7. Do not use hooks on the roof of canopy or CAB for
lifting the excavator.

70450 N (15838 lbf, 7184 kgf)

7210 N (1621 lbf, 735 kgf)

5. MAINTENANCE

Before doing maintenance work on the excavator, place
the machine on even solid ground, lower the attachments
to the ground, stop the engine 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. Turn off the engine at all times when filling with fuel.
Avoid spilling and over-filling of fuel.

-5SAFE OPERATION

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 the refillable type battery if the
fluid level is below the LOWER (lower limit level) mark.
Otherwise, the battery component parts may be
prematurely deteriorated, 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.

9. 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 to 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.

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

14.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.

15.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 work shop manual of KUBOTA
(W.S.M.) for the product involved.

16.When lifting the machine itself with an attachment,
place a safety block or safety post to prevent the
machine from turning over. Keep the lock lever for
attachment control in the "LOCK" position.

10.To avoid environmental damage from acid and heavy
metals, do not throw the battery away.

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

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

17.KUBOTA uses no parts which are lined with asbestos.
Do not use these kind of parts even if they are
available and can be installed.

18.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.

SAFE OPERATION-6

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

-9SAFE OPERATION

SAFE OPERATION-10

-11SAFE OPERATION

(1) Code No. RC418-5725-1 [Both sides]

Do not allow any persons within the
working range.

(2) Code No. RD118-5737-1

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, 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 this manual, you will realize that much of the
routine maintenance can be done by yourself. Your
KUBOTA dealer is responsible for servicing and the
delivery of spare parts. 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.

(1) Engine serial No.

2 TECHNICAL DATA

TECHNICAL DATA

KUBOTA EXCAVATOR

Model name U25

Type Canopy

Operating weight
(including op era tor's) kg ( lbs. )

Type Water cooled 3 cylinder diesel engine

Model name KUBOTA D1105-E4-BH-1

Total displacement
cc (cu.in)

Engine

Performance

Dozer Width X Height mm (in.) 1500 x 300 (59.1 x 11.8)

Boom swing angle

Pressure
connection
for
attachments

Fuel tank c apac ity L (U S gal) 28 (7.4)

Engine
power

Rat ed speed rpm 240 0

Low idle speed rpm 1300 to 1400

Unit swing speed rpm 9.8

Travel
speed

Ground kPa
pressure (kgf/ )
(With operator) [psi]

Climbing angle % (deg) *36 (20)

Angle in case of
crossing slope % (deg)

Max.displacement
(Theoretical)
L (US ga l)/ min

Max. pressure Mpa
(kgf/ )
[psi]

SAE gross
kW (HP)

Net kW (HP) 14.8 (19. 8)

Fast km/h (mph) 4.5 (2.8)

Slow km/h (mph) 2.5 (1.6)

Le ft r ad ( deg) 1.3 1 (75 )

Right rad (deg) 0.96 (55)

2545 (5611)

1123 (68.5)

15.6 (20.9)

22.9
(0.23)
[3.27]

*27 (15)

48.0 (12.7)

21.6

(220)

[3130]

A Above dimensions are based on the machine with rubber tracks and JPN bucket.

JPN = made in Japan

A Specifications subject to change without notice.
D With unloaded digging 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.

3DESCRIPTION OF MACHINE PARTS

DESCRIPTION OF MACHINE PARTS

DEPICTED CONTENTS
(1) Arm
(2) Bucket cylinder
(3) Bucket link
(4) Bucket
(5) Swing bracket
(6) Dozer cylinder
(7) Dozer blade
(8) Arm cylinder
(9) Boom
(10) Operator's seat
(11) Engine hood
(12) Drive sprocket
(13) Front idler
(14) Working light (option)

4 INSTRUMENT PANEL AND CONTROL ELEMENTS

INSTRUMENT PANEL AND CONTROL ELEMENTS

B Instrument Panel, Switches

DEPICTED CONTENTS
(1) Starter switch
(2) LCD display
(3) Working light switch
(4) Horn switch
(5) Travel speed switch
(6) User setting switch (switch 2)
(7) Display selector switch (switch 3)

B Instrument Panel

5INSTRUMENT PANEL AND CONTROL ELEMENTS

DEPICTED CONTENTS
(1) Speed indicator light
(2) Aux operation lamp
(3) Periodic check lamp
(4) Clock setting request lamp
(5) Glow lamp
(6) Remaining fuel warning lamp
(7) Engine oil pressure warning lamp

(8) Battery charge lamp
(9) Coolant temperature warning lamp
(10) Warning lamp
(11) Fuel gauge
(12) Coolant temperature gauge
(13) LCD display

INSTRUMENT PANEL AND CONTROL ELEMENTS6

B Control Pedals and Levers

DEPICTED CONTENTS
(1) Throttle lever
(2) Drive lever (left)
(3) Drive lever (right)
(4) Control lever for front attachments (left)
(5) Control lever for front attachments (right)
(6) Dozer control lever
(7) Service port pedal
(8) Boom swing pedal
(9) Lock lever*

D When the lock lever pulled up prevents inadvertent machine movement.

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:
A Do maintenance work on the excavator only on

even ground with the engine off and the stop
lever in the "Lock" position.

Checks

Go around the excavator and check for visual damage
and wear.
Check coolant level. (See regular checkpoints in the
chapter on maintenance.)
Check fuel level.
Check engine oil level.
Check hydraulic fluid level.
Check air filter for clogging.
Check all control lamps, indicators, revolution counter and
hour meter.
Check the light system.
Check the condition of the safety and warning labels. (See
"DANGER, WARNING AND CAUTION LABELS" in
"SAFE OPERATION" .)

SLIDING THE SEAT

To avoid personal injury:
A Lock the lever for attachment control when

sliding the seat.

To slide the seat forward, pull the seat sliding lock lever
and tilt the seat forward.

(1) Seat sliding lock lever
(2) Lock lever for attachment control

(A) "Sliding forward"
(B) "Lock"

CHECKS BEFORE START8

OPENING AND CLOSING OF PARTS

BOpening / Closing of the Engine Hood

To avoid personal injury:
A Do not touch the exhaust muffler or the

exhaust pipe; serious burns can occur.

Insert the key into the key hole and turn it clockwise to
unlock, and lift up the hood until the stay locks
automatically.
For closing, lift up the hood and release the stay.
Push down the hood until it locks automatically.

BOpening and Closing of the Fuel Tank

Cover

To open the tank cover, first insert the key into the key slot
and turn it counterclockwise to unlock, then open the tank
cover upward.
For closing, return the tank cover to original position and
turn the key clockwise to lock, then remove the key.

(1) Key
(2) Tank cover
(3) Stay

(A) Unlock

(1) Key

(2) Stay
(3) Unlock

(1) Fuel tank cap
(2) Air vent

9CHECKS BEFORE START

BKeeping the Tools

Pull the seat sliding lock lever and slide the seat forward.

(1) Seat sliding lock lever
(2) Lock lever for attachment control

(A) "Sliding forward"
(B) "Lock"

HANDLING THE SAFETY DEVICES

BControl Lever Lock

A When the excavator is not used or left unattended,

be sure to place the lock lever in position "Lock".

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

(1) Tool Box
(2) Grease gun

BOperator's Manual Storage

(1) Lock lever for attachment control (A) "Lock"

(B) "Unlock"

(1) Operator's manual

CHECKS BEFORE START10

BRoll-Over Protective Structures (ROPS) /

Operator Protective Guards of Top Guard
Level I (OPG (Top Guard Level I))

For your safety, ROPS / OPG (Top Guard Level I) with a
seat belt is installed with your machine. A ROPS / OPG
(Top Guard Level I) label is fastened to the ROPS / OPG
(Top Guard Level I). This label shows the serial No. of
ROPS / OPG (Top Guard Level I), gross weight, approval
and regulation No. and model No. of the machine.

(1) Bolt
(2) Spring washer
(3) Plain washer

ROPS

MODEL No.

U25 CANOPY RFP 2820 RB419-4531

ROPS

PARTS No.

MAX. GROSS

MACHINE

MASS

2820 kg

(6217 lbs)

To avoid personal injury or death:
A Do not modify a ROPS / OPG (Top Guard Level

I) in any way. Welding, grinding, bending,
drilling or cutting any portion of the ROPS /
OPG (Top Guard Level I) may weaken the
structure. Do not repair a damaged ROPS /
OPG (Top Guard Level I). A damaged ROPS /
OPG (Top Guard Level I) structure must be
replaced, not repaired or revised. If any
structural member of the ROPS / OPG (Top
Guard Level I) is damaged, replace the entire
structure at your local KUBOTA dealer. Check
the seat belt daily and replace it if damaged or
frayed.

A Do not remove the ROPS / OPG (Top Guard

Level I) except for service. Install the ROPS /
OPG (Top Guard Level I) correctly before you
operate the machine again.

QTY. Grade Tightening Torque

(1) Bolt
(2) Spring washer
(3) Plain washer

Bolt M14 2 9T

Bolt M16 2 9T

Nut M14 4 6T

Nut M16 4 6T

124 to 147 N-m

(12.6 to 15.0 kgf-m)

196 to 226 N-m

(20.0 to 23.0 kgf-m)

108 to 126 N-m

(11.0 to 12.8 kgf-m)

167 to 191 N-m

(17.0 to 19.5 kgf-m)

A Do not install any attachments that will cause

the total gross weight of the machine to exceed
the weight shown in the "FOR MAXIMUM
GROSS MACHINE WEIGHT" space on the
ROPS / OPG (Top Guard Level I) label.

OPERATION OF THE ENGINE

To avoid personal injury:
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

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.

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

11OPERATION OF THE ENGINE

(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 more than 10 sec.

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

sec. or more, before attempting to restart.

STARTING THE ENGINE

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

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

Start the engine in the following manner:

1. Before starting the engine, make sure that all control
levers are in the neutral positions.

2. Pull the lock levers all the way back. (lock position)

A Put the throttle lever towards .

3. Insert the key into the starter switch and turn it to the
position "Run". The glow lamp indicator will light up
while the engine is preheated and will go out
automatically after preheating is finished.

(1) Starter switch (A) "STOP"

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

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

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

A When the lock levers are in "UNLOCK" position, the

engine does not start.

OPERATION OF THE ENGINE12

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 three-mode display according to your jobs.

C Setting the clock
[Selecting the clock setting mode]

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

(1) Starter switch (A) "STOP"

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

(1) Display selector switch
(2) LCD display

A With the starter key at the "STOP" position, press the

electronic meter's display selector switch, and the LCD
display shows the hour meter for 10 seconds.

2. Press the user setting switch (switch 2 (1)).

3. Select the clock setting mode by pressing the display
selector switch (switch 3 (2)) and the clock setting
request lamp " " on the instrument panel lights up.

(1) User setting switch (switch 2)
(2) Display selector switch (switch 3)
(3) Clock setting request lamp

A Press switch 3 (2) for a long time and the year, month,

day, hour and minute will be selected in this order.

13OPERATION OF THE ENGINE

[Setting the year]

Press switch 2 (1) and the numeric setting will be smaller.
Press switch 3 (2) and the numeric setting will be larger.

Switch 2 Switch 3

2015

2014

2013

A While setting the clock, the clock setting request lamp

on the instrument panel is blinking.

[Setting the month]

2017

2016

2015

[Setting the day]

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

Switch 2 Switch 3

09

08

07

[Changing the AM/PM system to the 24-hour system]

Select the AM/PM system or 24-hour system by pressing
switch 3.

11

10

09

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

Switch 2 Switch 3

10

9

8

12

11

10

[Setting the hour]

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

Switch 2 Switch 3

11

10

9

13 (or 01)

12

11

OPERATION OF THE ENGINE14

[Setting the minute]

BBattery Charge Lamp

This warning lamp lights up if the charging system fails
while the engine is running. When the starter switch is
turned "ON" with the engine off, the lamp lights up, and
when the engine gets started, the lamp goes out.

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

Switch 2 Switch 3

50

49

48

If switch 3 is pressed for a long time, the new settings will
be made.

A If the battery is disconnected, the clock setting request

lamp " " (yellow) will blink for requesting the setting
the clock.

52

51

50

A If there is disconnection or failure in the charging

system when the key is turned to "RUN", the following
symbol will appear.

(1) Battery charge lamp

BEngine Oil Pressure Warning Lamp

The engine oil pressure warning lamp lights up due to
failure of the lubricating system with the engine running.
When the starter switch is turned "ON" with the engine
off, this lamp lights up, and when the engine starts, the
lamp goes out. If the lamp stays on with the engine
running, stop the engine and check the engine oil level.

A If there is disconnection, failure or breakdown in the

lubricating system when the key is turned to "RUN",
the following symbol will appear.

(1) Engine oil pressure warning lamp

BGlow Lamp

With the starter key at the "RUN" position, the engine's
preheat status is indicated.

A When the starter switch is turned to the "RUN"

position, the engine will be preheated for a given
period of time and the indicator will turn on.

A The above indication appears momentarily when the

engine is started, but it does not indicate trouble. (This
is because the oil charge sensor output fluctuates
when the engine is started.)

A The following symbol appears momentarily as the

engine starts. This is not an error.

15OPERATION OF THE ENGINE

BLCD Display for Normal Operation

C Fuel gauge

To avoid personal injury:

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.

If the fuel in the tank goes below the prescribed level, the
warning lamp will flash.
If this should happen during operation, refuel as soon as
possible.

(1) Glow lamp

(1) Fuel gauge
(2) Remaining fuel warning lamp

A If the fuel gauge indicator is near the "", add fuel as

soon as possible. If the indicator is near "" and the
machine operates on a slope, the engine may run out
of fuel.

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

(A) "FULL"
(B) "EMPTY"

OPERATION OF THE ENGINE16

C Coolant Temperature Gauge

To avoid personal injury:
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 cooling
water temperature is indicated.

BLCD Display for Warning

C Engine oil pressure warning lamp

The engine oil pressure warning lamp lights up due to
failure of the lubricating system with the engine running.
When the starter key is turned to "RUN" position with the
engine off, this engine oil pressure lamp lights up, warning
lamp blinks and when the engine starts, the lamps go out.
If the lamp stays on with the engine running, stop the
engine and check the engine oil level.

(1) Coolant temperature gauge (A) "HOT"

(B) "COOL"

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.

C Engine tachometer

Indicates the current rpm of the engine.

(1) Engine oil pressure lamp
(2) Warning lamp (red)
(3) Error code

C Battery charge lamp

This battery charge lamp lights up if the charging system
fails with the engine running.
When the starter key is turned to "RUN" position with the
engine off, the battery charge lamp lights up, warning
lamp blinks and when the engine starts, the lamps go out.
If the lamp stays on with the engine running, stop the
engine and check the V-belt.

A The LCD display may be illegible when viewed from a

certain angle. This is not a display failure.

(1) Battery charge lamp
(2) Warning lamp (red)
(3) Error code

BWarning Lamp

The warning lamp is used to indicate broken wire, short­circuit, fuel shortage and other problems.

A Do not just look at the meter, but also carry out the

inspection and correction accordingly.

A The warning lamp starts flashing in red if a serious

problem occurs. If the system gets in warning signal,
the warning lamp starts flashing in yellow.

A Warnings and errors are displayed and an alarm

buzzer beeps.

A Let your KUBOTA dealer inform you of details

concerning care and maintenance.

17OPERATION OF THE ENGINE

With the error code displayed, take the procedure below.

1. Bring the machine to a stop on a safe place. (Get the
engine unloaded.)

2. Do not yet stop the engine, but allow it to run idle
unloaded for 5 minutes or so. Then stop the engine.

3. Keep yourself away enough from the machine for
another 10 minutes or while the engine is emitting
steam.

4. Make sure there is no risk of getting burned. Then
remove the cause of overheat, referring to
"TROUBLESHOOTING". Finally get the engine
restarted.

BCheckpoints after Starting the Engine

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

1. Put the throttle lever in position "LOW" and let the
engine idle for approx. five minutes. This allows the
engine lubricant to warm up and penetrate every part
of the engine.

Note:

A This idling is usually called "Warm-up".

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.

(1) Warning lamp
(2) Error code

C Overheat warning

If the water temperature has risen too high, the water
temperature warning lamp lights up and the following
error code (E:015) gets displayed.

(1) Water temperature warning lamp
(2) Error code

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.

OPERATION OF THE ENGINE18

STARTING THE ENGINE UNDER COLD CONDITIONS

To avoid personal injury:
A Make sure that the lock lever is in the lock

position during warm up.

Start the engine in the following manner;

1. Pull the lock levers all the way back (lock position).

2. Turn the starter switch to the position "RUN" (glow
position) and keep until the indicator lamp has gone
out.

3. Move the starter switch to the position "START"; to
crank and start engine.

4. Release the starter switch after the engine has started;
it will automatically return to the position "RUN ".

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 operations will be affected.
Do not operate the excavator under full load before the
engine has warmed up enough.

BEngine Stop Lever

To avoid personal injury:
A Keep hands away from rotating parts.

The engine stops when the key is turned off. If the engine
does not stop, open the engine hood and push the stop
lever back and hold it until the engine stops.

STOPPING THE ENGINE

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

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

1. After slowing the engine to idle, turn the

key to "STOP".

2. Remove the key.

3. Pull the lock lever to "Lock" position.

(1) Stop lever

STARTING WITH AN AUXILIARY BATTERY

To avoid personal injury:
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 lock lever in the "Lock"
position.

3. Wear eye protection and rubber gloves.

4. Remove the battery caps from both batteries. (If
present)

5. Cover the battery opening with a cloth. Make sure that
the cloth does not touch the battery terminals.

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 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.Remove the cloth and replace the vent caps.

19OPERATION OF THE ENGINE

(1) Remove battery caps (if present)
(2) Low battery
(3) Put a cloth over the battery openings
(4) Jumper cables
(5) Auxiliary battery

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

starting system.

A Only use 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.

20 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 most 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.

STARTING

To avoid personal injury:
A No persons, other than those familiar with the

excavator, are allowed to use the excavator.

A Do not allow any person other than the

operator to ride on the excavator.

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 and cause damage and shorten
the life of many components. Pay attention to the oil­change intervals and complete them sooner than later.
See "REGULAR CHECKS AND MAINTENANCE WORK"
section for more details on the oil-change intervals.

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.

BAdjusting the Operator's Seat

To avoid personal injury:
A Before adjusting the operator's seat, make sure

that no one puts hands on the engine hood
behind the seat.

A After having adjusted the seat, make sure that

the seat adjuster has clicked into position.

A Lock the lever for attachment control when

adjusting the seat.

For and aft: While holding up the for-and-aft adjustment
lever, reposition the seat for and aft.

(1) Seat belt

(1) For-and-aft adjustment lever
(2) Lock lever for attachment control

(A) "Unlock"

21EXCAVATOR OPERATION

BLock Lever

To avoid personal injury:
A To avoid injuries, check safety features all

around the excavator.

A With the lever lock pulled down, the engine fails to

start.

(1) Lock lever (Unload lever) (A) "Unlock"

BWorking Light Switch

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

(1) Working light switch

C Night operation

To avoid personal injury:
A Visibility is reduced in darkness, therefore the

work light alone may not be enough. In which
case, prepare additional stationary artificial
lighting, observe safety rules as well as special
regulations for night work.

BTravel Buzzer (Option)

When you handle the drive levers, the buzzer sounds at
the same time or before the excavator starts to run.

EXCAVATOR OPERATION22

TWO PATTERN SELECTION SYSTEM (TPSS)

To avoid personal injury:
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 lock lever to prevent accidental

pattern change.

A Familiarize yourself with the pattern selected

by operating slowly.

Lever Position Pattern A Pattern B

BPattern Change

1. Loosen the lever lock knob (2) and slide it to the
direction (a), and position the pattern selector lever (1)
to the desired position.

2. Slide the lever lock knob (2) to the direction (b) and
tighten it.

(1) Pattern selector lever
(Two Pattern Selection System:TPSS)
(2) Lever lock knob
(3) Pattern A
(4) Pattern B

(a) "UNLOCK"
(b) "LOCK"

Attachment
Control Lever
(Left)

Attachment
Control Lever
(Right)

A

Boom down

B

Boom up

C

Swing left

D

Swing right

Arm up
Arm crowd
Bucket crowd
Bucket dump

Arm up
Arm crowd
Swing left
Swing right

Boom down
Boom up
Bucket crowd
Bucket dump

23EXCAVATOR 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.
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 no sign of
a 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 OPERATION24

OPERATION OF 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 dumps its
contents.

SWIVEL(UNIT SWING)OPERATION

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

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

A Keep away from the working area.

BOOM 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.

(1) Boom swing pedal
(2) Pedal lock

OPERATION OF THE DOZER

1. To raise the dozer, pull back the control lever. Pushing
the control lever forwards lowers the dozer.

A Do not operate the left attachment control lever

abruptly from right to left (or vice versa). Because of
the low of inertia, this causes an impact load on the
swing gear and the swing motor. Additionally, the life
of the excavator will be shortened.

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.

(1) Control lever
(2) Dozer

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

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

25EXCAVATOR OPERATION

SERVICE PORT OPERATION

To avoid personal injury:
A Tilt the service port pedal forward when the

pedal is not used. Be sure to lock the pedal.

This pedal is used to operate attachments such as
breakers.

(1) Service port pedal
(2) Pedal lock

A Push the right part of the pedal ( ) to send oil to the

port (A).

A Push the left part of the pedal ( ) to send oil to the

port (B).

(A) Port (A)
(B) Port (B)

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. (Idler and dozer blade to the front of
the excavator).

(A) "Front"

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

2. Unlock the lock lever for attachment control.

3. Raise the dozer and hold the bucket about 20 to 40 cm
(8 to 16 in.) over the ground.

Max. Flow

Volume

Theoretical L (US gal.) min.

Max. Pressure

MPa (kgf/cm )[psi]

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

particles can settle in the lower part of the service port
lines.
When the plugs on the service port lines are removed
to connect attachments, drain approx. 100 cc of oil per
side.
For breaker choices, contact your dealer.

48.0 (12.7)

21.6 (220)
[3132]

(A) 20 to 40 cm (8 to 16. in.)

EXCAVATOR OPERATION26

BDrive Levers (Right, Left)

To avoid personal injury or death:
A If the swing frame has been turned 180 , i.e. the

dozer blade is, seen from the operator,
"behind", then the travel direction is opposite
to the drive direction of the levers (when
activating the drive lever forwards, the
excavator, seen from the operator, will move
backwards).

Pushing the drive lever forward, moves the excavator
forward, and vice-versa. The front of the excavator is the
direction where the dozer is present.

(A) "Rotate to shake off sand and gravel"

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 and
the travel speed changes from first speed to second.
The symbol lights up.

2. Press the travel speed switch again, and the buzzer
beeps and the travel speed changes from second
speed to first. The symbol light goes out.

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

(A) "Forward"
(B) "Backward"

A If the tracks are clogged with sand or gravel while

working on soft ground, lift up one track with the help
of the boom, arm and bucket and let the track rotate to
shake off the sand and gravel.

To avoid personal injury or death:
A When lifting the machine with an attachment,

place a safety block or safety post to prevent
the machine from turning over. Keep the lock
lever for attachment control in the "LOCK"
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 first and second.

A Do not activate the travel speed switch when there is

increased drive resistance (e.g. driving on inclines or
on uneven grounds).

27EXCAVATOR OPERATION

TURNS

To avoid personal injury:
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 shows the turning directions

with the dozer blade in the front.

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.

C Change of Direction while Travelling

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

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

2. While travelling backwards, bring the left drive lever in
the neutral position;
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.

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

EXCAVATOR OPERATION28

BSpin Turn

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

(A) "Left spin turn"

UP AND DOWNHILL TRAVELLING

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

caution and follow the instructions below.

While travelling uphill, keep the lower edge of the bucket
approx. 20 to 40 cm (8 to 16 in.) 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 travelling downhill.
Always choose slow speed for uphill and downhill
travelling.

[UPHILL TRAVELLING]

(B) "Right spin turn"

(A) 20 to 40 cm (8 to 16 in.)

[DOWNHILL TRAVELLING]

29EXCAVATOR OPERATION

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

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.

30 TRANSPORTING THE EXCAVATOR ON A TRUCK

TRANSPORTING THE EXCAVATOR ON A TRUCK

To avoid personal 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

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

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

A When the excavator reaches the point between

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

A Move the excavator onto the truck only with the

arm completely pulled in. Otherwise the truck
cabin could be damaged when swinging
around the upper body.

A Do not jack up the machine using its boom to

load or unload the excavator from the truck.
Dangerous situation could arise.

B Transporting on a Truck

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 truck, and block the
drive wheels from both sides.

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

4. Align the ramps and the tracks and then drive the
excavator slowly up the ramps with the dozer in the
front. After ensuring that the tracks are completely on
the truck bed, swivel the upper body around to the
back of the truck.

5. Block the tracks and tie down the excavator with
suitable chains and approved method (check
appropriate state regulation).

6. Before unloading, raise the dozer and bucket from the
truck bed.

31TRANSPORTING THE EXCAVATOR ON A TRUCK

32 LIFTING OF THE EXCAVATOR

LIFTING OF THE EXCAVATOR

(1) Always hook the excavator at three points. (one

on the boom and right and left of the dozer)

To avoid personal 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 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 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.

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

attaching the cables or straps.

(3) Use protective material at all places where the

cables or straps contact the machine.

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

or straps within. 30 (0.52 rad.).

(1) Steel cable
(2) Shackle
(3) Protective material

B Lifting Procedure for the Excavator

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

cabin for lifting the excavator.

C General guidelines for lifting

1. Lifting position. (see illustration)
(1) Pull in the boom towards rear.
(2) Pull in the arm completely.
(3) Pull in the bucket completely.
(4) Adjust the swing angle to the center. (to bring the

boom in a position parallel to the machine frame)

(5) Swing frame so that dozer blade is to the rear and

frame is parallel with tracks.

(6) Raise the dozer blade fully.

2. Attaching the steel cables or straps.

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.

Excavator Weight* 2520 kg

Load / Cable 8500 N

33LIFTING OF THE EXCAVATOR

Minimum Cable Diameter
(Safety factor=6)

12.5 mm or more

*Excavator Weight: With canopy, steel tracks.
Steel cable: 6X24

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) - "6X24"

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

34 MAINTENANCE

MAINTENANCE

MAINTENANCE INTERVALS

No. Check points Intervals

1 Coolant

2 Fuel check Daily check 37

3 Engine oil

4 Hydraulic oil

5 Lubrication points - Daily check 39

6 Radiator and oil cooler check Daily check 40

7 Engine and electrical wiring check Daily check 40

8 Fuel tank, Water separator drain every 50 hrs 41,41

9 Battery condition check every 50 hrs 42

10 Greasing swing bearing teeth - every 50 hrs 43

11 Fan belt tension

12 Radiator hoses and clamps

13 Air filter element

14 Greasing swing ball bearings - every 200 hrs 45

15 Fuel filter cartridge replace every 500 hrs 48 @

16 Engine oil filter replace every 500 hrs 47

17 Drive unit oil change every 500 hrs 48

18 Hydraulic return filter element replace every 500 hrs 49

19 Hydraulic suction filter element replace every 1000 hrs 50

20 Filter in the pilot hydraulic system replace every 1000 hrs 49

Fuel injection nozzle injection

21

pressure

22 Front idler and track roller oil change every 2000 hrs 51

23 Alternator and starter motor check every 2000 hrs 51

24 Injection pump check every 3000 hrs 51 *4 @

25 Radiator system rinse every 2 years 52

26 Fuel line and Intake air line

27 Greasing pilot valve linkage - every 250 hrs 46

28 Pilot circuit filter clean every 1000 hrs 49

Outer element

Inner element replace every 1000 hrs 51 *2

check Daily check 39

change every 2 years 52

check Daily check 38

change every 500 hrs 46

check Daily check 38

change every 1000 hrs 50 *1

check Daily check 40

adjust every 200 hrs 44

check every 200 hrs 44

replace every 2 years 52

clean every 200 hrs 45 *2

replace every 1000 hrs 51 *2

check every 1500 hrs 51 *4 @

check every 200 hrs 46

replace every 2 years 53 *3

50 100 150 200 250 300 350 400 450

Hour meter indicator

Consequently

Ref.

page

@

@

D 500 thru 1000 continued to the following table.

35MAINTENANCE

No. Check points Intervals

1 Coolant

2 Fuel check Daily check 37

3 Engine oil

4 Hydraulic oil

5 Lubrication points - Daily check 39

6 Radiator and oil cooler check Daily check 40

7 Engine and electrical wiring check Daily check 40

8 Fuel tank, Water separator drain every 50 hrs 41,41

9 Battery condition check every 50 hrs 42

10 Greasing swing bearing teeth - every 50 hrs 43

11 Fan belt tension

12 Radiator hoses and clamps

13 Air filter element

14 Greasing swing ball bearings - every 200 hrs 45

15 Fuel filter cartridge replace every 500 hrs 48 @

16 Engine oil filter replace every 500 hrs 47

17 Drive unit oil change every 500 hrs 48

18 Hydraulic return filter element replace every 500 hrs 49

19 Hydraulic suction filter element replace every 1000 hrs 50

20 Filter in the pilot hydraulic system replace every 1000 hrs 49

Fuel injection nozzle injection

21

pressure

22 Front idler and track roller oil change every 2000 hrs 51

23 Alternator and starter motor check every 2000 hrs 51

24 Injection pump check every 3000 hrs 51 *4 @

25 Radiator system rinse every 2 years 52

26 Fuel line and Intake air line

27 Greasing pilot valve linkage - every 250 hrs 46

28 Pilot circuit filter clean every 1000 hrs 49

Outer element

Inner element replace every 1000 hrs 51 *2

check Daily check 39

change every 2 years 52

check Daily check 38

change every 500 hrs 46

check Daily check 38

change every 1000 hrs 50 *1

check Daily check 40

adjust every 200 hrs 44

check every 200 hrs 44

replace every 2 years 52

clean every 200 hrs 45 *2

replace every 1000 hrs 51 *2

check every 1500 hrs 51 *4 @

check every 200 hrs 46

replace every 2 years 53 *3

500 550 600 650 700 750 800 1000

Hour meter indicator

Consequently

Ref.

page

@

@

36 MAINTENANCE

First operation

*1 When using a hydraulic breaker, 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.

37MAINTENANCE

DAILY CHECKS

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

BCheck Fuel Level

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

fuelling.

A Do not smoke while fuelling.

A When temperatures are over -7 (20 ), use No.2-D

diesel fuel, when temperatures are under -7 (20 ),
use No.1-D diesel fuel or a blend of No.2 and No.1
diesel.

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"

A To prevent condensation (water) accumulations in the

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

Open the tank cap with the starter key, and add fuel.
A See "Opening and Closing of the Fuel Tank Cover"

and "LCD Display for Normal Operation."

(1) Fuel tank cap

Fuel tank capacity 28 L (7.4 US gal.)

If the fuel in the tank goes below the prescribed level, the
warning lamp will flash.
If this should happen during operation, refuel as soon as
possible.

(1) Fuel gauge
(2) Remaining fuel warning lamp

(A) "FULL"
(B) "EMPTY"

MAINTENANCE38

BCheck Engine Oil Level

To avoid personal injury:
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 five

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

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.

BCheck Hydraulic Oil Level

To avoid personal injury:
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". (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) Engine oil dipstick (A) Required level

(2) Oil filling port

2. Check the oil level as to whether it lies on the center of
the gauge at normal temperature (10 to 30 (50 to
80 )).

(1) Specified oil level
(2) Tank cap

39MAINTENANCE

BChecking Coolant Level

To avoid personal injury:

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
transferred to the radiator.
Check the coolant level in the recovery tank and fill up if
necessary. The coolant level should be between the
marks "FULL" and "LOW".

BLubrication Points

To avoid personal injury:
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.

1. Boom bottom linkage............................. 1 place

2. Arm bottom linkage................................ 1 place

3. Bucket link pin........................................ 3 places

4. Boom cylinder pin.................................. 1 place

5. Boom cylinder boss............................... 1 place

6. Arm cylinder boss................................... 1 place

7. Arm cylinder pin..................................... 1 place

8. Bucket cylinder pin................................ 1 place

9. Fixing pin between arm and bucket........ 1 place

10. Boom swing fulcrum............................... 2 places

11. Swing cylinder boss............................... 2 places

12. Dozer cylinder boss................................ 2 places

13. Dozer linkage pin................................... 2 places

(1) Recovery tank (A) "FULL"

(B) "LOW"

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

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.

MAINTENANCE40

BCheck Radiator and Oil cooler

To avoid personal injury:
A Always stop the engine and remove the key

before checking the radiator.

A Wear eye protection when cleaning with

compressed air.

1. Check if the fins and ribs are clogged.
If so, clean with compressed air or steam.

2. Check the rubber hoses for damage and replace if
cracked or old. Check if the hose clamps are tight
enough.

BCheck Fan Belt

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

checking the fan belt.

A Check the fan belt for cracks and proper

tension. (See "Checking Fan Belt Tension" in
"REGULAR CHECKS AND MAINTENANCE
WORK" section.)

BCleaning of Engine and Electrical Wiring

To avoid personal injury:
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. If so, remove thoroughly.

(1) Radiator
(2) Oil cooler

(3) Rubber hoses and clamps

A Radiator fins and ribs must be clean in order not to

overheat the engine and allow free flow of air through
the cooling elements.

41REGULAR CHECKS AND MAINTENANCE WORK

REGULAR CHECKS AND MAINTENANCE WORK

EVERY 50 SERVICE HOURS

BDraining the Water from the Fuel Tank

To avoid personal injury:
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.

1. Remove the drain plug on the underside of the body
and drain water.

2. Re-tighten the drain plug.

BDraining Water Separator

1. Open the hood.

2. When the separated water is being drained, the red
float moves upwards.
When the float reaches the line, close the shutoff­valve so that no fuel can run out. Now loosen the ring
nut, and remove the cup and empty completely.

3. Finally, do not forget to open the shutoff-valve and
close the hood.

(1) Ring nut
(2) Cup
(3) Shutoff-valve

(4) Float
(5) Line

(1) Drain plug

REGULAR CHECKS AND MAINTENANCE WORK42

BBattery

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.

1. Check the battery fluid level and add distilled water if
necessary.

2. Clean the battery caps (ventilation holes).

To avoid personal injury:
A Batteries contain sulphuric acid which can

cause severe burns. Avoid all contact with
skin, eyes or clothing. Antidote - External:
Rinse with plenty of water. Internal: Drink large
quantities of water or milk. Follow with milk of
magnesia, beaten egg or vegetable oil. Call a
physician immediately. Eyes: Rinse with plenty
of water for 15 minutes and get prompt medical
attention. Keep batteries out of the reach of
children.

A Before inspection or dismounting the battery,

be sure to turn the starter switch to the "OFF"
position and turn off the engine.

A When removing the battery, always disconnect

the negative ground cable first. The reverse
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.

(1) Battery

(A) Battery fluid level
(B) "Too low"
(C) "Correct"
(D) "Too high"

43REGULAR CHECKS AND MAINTENANCE WORK

BBattery Charging

To avoid personal injury:
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 battery, remove battery vent

plugs.

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 Do not check battery charge by placing a metal

object across the terminals.
Use a voltmeter or hydrometer.

1. Make sure each electrolyte level is to the bottom of
vent wells. If necessary add distilled water in a well­ventilated area.

2. The water in the electrolyte evaporates during
recharging. Liquid shortage damages the battery.
Excessive liquid spill damages the excavator body.

3. To slowly charge the battery, connect the battery
positive terminal to the charger’s positive terminal and
the negative to the negative one. Then, recharge in the
standard fashion.

4. A boost charge 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.

5. When the specific gravity of electrolyte falls between

1.27 and 1.29, charge has completed.

6. When exchanging old battery for a new one, use
battery of equal specification.

BGreasing of Swing Bearing Teeth

1. Pump grease with 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 pumps with
the grease gun). Distribute the grease over the teeth.

(1) Grease fitting (for Bearing teeth)

REGULAR CHECKS AND MAINTENANCE WORK44

EVERY 200 SERVICE HOURS

Do all 50 hour servicing at the same time.

BChecking Fan Belt Tension

C Check and adjustment of the fan belt tension

To avoid personal injury:

A First stop the engine and remove the key.
A After servicing, make sure to replace the belt

cover in its original position.

1. Press the fan belt down in the middle, with a force of
approx. 7 kg (15 lbs). The belt tension is correct if it
deflects about 7 mm (0.28 in.). If otherwise, loosen bolt
(1) and (2) and shift the alternator (3) in the direction
shown by the arrow.

2. Replace the fan belt if worn out, cracked or torn.

BChecking Radiator Hoses and Clamps

To avoid personal injury:
A Wait long enough for the radiator coolant to

cool down.

Check the water 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 water 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) Bolt
(2) Bolt
(3) Alternator

A If the engine is run with a loose fan belt, the belt could

slip and cause overheating of the engine or 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.

(A) about 7 mm (0.28 in.)
(B) approx. 7 kg (15 lbs.)

(1) Radiator hoses (2) Hose clamps

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.

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.

45REGULAR CHECKS AND MAINTENANCE WORK

C Cleaning with compressed air

Pressure of compressed air must be under 205 kPa (2.1
kg/ , 30 psi), and the cartridge should be blown clean
from the inside to the outside until the dust deposits are
remarkably reduced.

A If the air suction is still inadequate, or the colour of the

exhaust gases is abnormal even after the cleaning, the
air filter element must be replaced.

(1) Inner element
(2) Outer element
(3) Dust-cover
(4) Clamps

BAir Filter Maintenance

To avoid personal injury:

A Wear eye protection.

BGreasing Swing 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 WORK46

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

EVERY 250 SERVICE HOURS

Do all 50 hour servicing at the same time.

BLubrication of the Pilot Valve

Remove the rubber bellows from the underside of the
control levers. Grease the tip of the push rod and the
rotating part of the link.

(1) Rotating port of the link
(2) Tip of the push rod

(1) Hoses
(2) Hose clamps

EVERY 500 SERVICE HOURS

Do all 50 and 250 hour servicing at the same time.

BChanging Engine Oil (Change the engine

oil every 500 hours, or every 1 year in the
case that service hour is less than 500
hours)

To avoid personal injury:
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.

(1) Drain plug

3. Fill with new oil up to the required level.

47REGULAR CHECKS AND MAINTENANCE WORK

A Regardless of the service hours, an engine oil change

is due every 1 year.

Engine oil volumes

(with engine oil filter)

4.4 L (1.16 US gal.)

BReplacing Engine Oil Filter Cartridge

(Replace the engine oil filter every 500
hours, or every 1 year in the case that
service hour is less than 500 hours)

1. Replace the oil filter cartridge at the same time as
doing engine oil change.

2. Remove the cartridge with the supplied filter wrench.

(1) Oil filling port

(1) Engine oil dipstick (A) Required level

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.

(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 will sink parallel to the oil filter
capacity after the engine is started. It is necessary to
add oil.

A Always check the oil level when replacing the filter.

REGULAR CHECKS AND MAINTENANCE WORK48

BDrive Unit Oil Change (First Oil Change of

the 100 hours)

To avoid personal injury:
A Lower 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.

Gear oil volumes approx. 0.35 L (0.093 US gal.)

Oil change

- first oil change after 100 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:
A Keep fire away.

1. Remove the filter with the supplied filter wrench.

2. Add fuel to a new filter before installing.

3. Apply a light film of fuel to the seal of the new filter and
turn in tightly by hand.

4. Open the shutoff-valve of the fuel filter again.

(1) Oil check port (also serves as oil filling port)
(2) Drain plug

(1) Fuel filter cartridge

A After exchange of the filter, the fuel system must be

purged of air.

BReplacing Hydraulic Return Filter Element

(First replacement after 250 service
hours)

To avoid personal injury:
A Remove the oil filter only after the oil in the

hydraulic tank has cooled down.

49REGULAR CHECKS AND MAINTENANCE WORK

(A) Oil

BReplacing the Hydraulic Pilot Filter

Element

(1) Cover
(2) Return filter
(3) Filter support
(4) Lock nut

1. Remove the cover of the hydraulic tank.

2. Pull out the filter support by the top from the hydraulic
tank.

3. First loosen the lock nut, then remove the return filter
from the filter support and replace with a new filter.
Do not forget to tighten the lock nut.

A Always check the oil level when replacing the filter.

EVERY 1000 SERVICE HOURS

Do all 50, 200, 250 and 500 hour servicing at the same
time.

BCleaning of the Pipe filter of the Hydraulic

Pilot System (for Hydraulic Pilot Types)

Dust and dirt collect on the concave side of the filter.
Clean the filter by letting hydraulic oil flow through from
the convex side.

To avoid personal injury:
A Before replacing the element, wait long enough

for the hydraulic fluid to cool down.

1. Remove the arch cover.

2. Remove the hydraulic oil tank cover.

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.

(1) Head cover
(2) Element
(3) O-ring
(4) Case

REGULAR CHECKS AND MAINTENANCE WORK50

BHydraulic Oil Change (Including

Replacing of the Suction Filter in the
Hydraulic Tank)

To avoid personal injury:
A Wait long enough for the hydraulic fluid to cool

down. Then begin with the change of the
hydraulic fluid.

1. Move the excavator to a level ground and stop the
engine. Extend the piston rods of the cylinders halfway
out and lower the bucket on the ground.

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 exchange
the suction filter.

5. Retighten the drain plug.

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
level again.

Hydraulic
oil volumes

Hydraulic
tank

Whole oil
volumes

22.5 L (5.94 US gal.)

37 L (9.78 US gal.)

(1) Cover
(2) Suction filter
(3) Drain plug

51REGULAR CHECKS AND MAINTENANCE WORK

BHydraulic Oil Check with Hydraulic

Breakers

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
breakers are used:

1. Changing and filling up of hydraulic oil
(1) The hydraulic oil must be changed more often

when breakers are used because the machine is
subject to harder conditions than at normal
excavating work.

(2) Use only the recommended oils mentioned in the

operator's manual when changing or fill 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.

Hydraulic oil Return filter

Normal excavator
work

20% every 800 Hrs.

Breaker
work
portion

40% every 400 Hrs.

60% every 300 Hrs.

more every 200 Hrs.

every 1000 Hrs.

every 500 Hrs.

(250 Hrs. after
first operation)

every 200 Hrs.

every 100 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.

EVERY 2000 SERVICE HOURS

Do all 50, 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.

REGULAR CHECKS AND MAINTENANCE WORK52

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.

BIENNIAL SERVICING

To avoid personal injury:
A Do not loosen the radiator cap before the

radiator has cooled down sufficiently. Then
only loosen the cap and allow enough time for
the pressure in the system to be released. Now
remove the cap completely.

BChanging Radiator Coolant

(In case of long-life coolant fluid)
Stop the engine then remove the key and wait until it has
cooled down completely.

1. Open the drain plug or shutoff-valve on the bottom of
the radiator and drain coolant completely.

2. To clean, rinse the radiator with water.

3. Close the drain plug or shutoff-valve and fill the
radiator and the recovery tank with coolant fluid. Let
the engine idle for about 5 min., stop the engine and
check the coolant level then remove the key.

4. The machine has been shipped filled with 50% anti­freeze solution.

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) Radiator hoses
(2) Hose clamps

(1) Drain plug

(1) Radiator cap

(1) Recovery tank (A) "FULL"

(B) "LOW"

Radiator 2.4 L (0.63 US gal.)

53REGULAR CHECKS AND MAINTENANCE WORK

BReplacing Fuel Hoses and Hose Clamps

Replace the hoses and clamps.
(See "Checking Fuel and Intake Air Line" in "EVERY 200
SERVICE HOURS")

Reserve tank 0.6 L (0.16 US gal.)

A Do not operate the engine without coolant.
A To fill the radiator system 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.

(1) Fuel lines
(2) Clamp bands

BReplacing Intake Air line

Replace the hoses and clamps, if necessary.
(See "Checking Fuel and Intake Air Line" in "EVERY 200
SERVICE HOURS")

(1) Hoses
(2) Hose clamps

54 OTHER ADJUSTMENTS AND REPLACEMENTS

OTHER ADJUSTMENTS AND REPLACEMENTS

PURGING OF THE FUEL SYSTEM

1. Fill up the excavator 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"

A If the purging was insufficient, the engine dies right

after starting. In this case repeat steps 2 to 3 again.

After adjustment is completed:

Using the socket wrench, tighten the grease fitting.
Tightening torque must be between 98 to 108 N-m (72.3
to 79.7 ft-lbs).

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 Tension the tracks as specified:

1. Apply grease (2) to the grease fitting (1).

ADJUSTMENT OF TRACKS

C To loosen the tracks, follow the following

procedure:

To avoid personal injury:
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. Using a socket wrench, loosen the grease fitting a few
turns.

2. When grease oozes out from the thread, rotate the
track and loosen the track in the lifted position (see
illustration).

(1) Grease fitting
(2) Grease gun

2. Rubber Tracks
Tension 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, the track seam is positioned on the top center
between the idler and the sprocket.

Steel Tracks

To check the track tension, the track must be lifted
from the ground as shown. The track tension is correct
if the clearance between the outer end of the track
roller and the track interior surface corresponds to the
dimension specified in the table below.

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

condition.

A For your safety do not rely on hydraulically

supported devices, they may leak down and
suddenly drop or be accidentally lowered.

To avoid personal injury or death:
A When lifting the machine itself with an

attachment, place a safety block or safety post
to prevent the machine from turning over. Keep
the lock lever for attachment control in the
"LOCK" position.

55OTHER ADJUSTMENTS AND REPLACEMENTS

(1) Drive sprocket
(2) Idler

(A) 75 to 80 mm (3.0 to 3.2 in.)

A Make sure that no obstacles, such as stones are

caught in the track. Remove such obstacles before
adjusting the track tension.

A Track seam

The ends of the rubber track are joined with a seam.
When adjusting the tracks, the seam must be
positioned on the top center between the idler and the
sprocket.

(1) Seam (Mark " ") (A) 10 to 15 mm (0.4 to 0.6 in.)

If the seam is positioned incorrectly, the tracks will be
tensioned too loosely, and a further readjustment will
be necessary.

A Rotate the track after adjustment one to two times to

check the tension.

A Additionally following points are to be observed when

adjusting rubber tracks.
(1) If the track loosen more than 25 mm (1 in.),

readjust them.

(2) Check track tension 50 hours after initial use and

readjust if necessary. Check and adjust thereafter
every 50 service hours.

BSpecial Information when Using Rubber

Tracks

1. When turning, make a slow swing turn. Avoid spin
turns to reduce lug wear and entry of dirt.

2. The relief valve may be activated if too much dirt and
sand clog the tracks. In this case move the machine for
a short distance straight backwards to let the earth and
sand fall off, then a turn can be made.

3. Avoid using rubber track on riverbeds, stony
underground, ferro-concrete and on iron plates. The
rubber can damage as well as increase wear on the
tracks.

OTHER ADJUSTMENTS AND REPLACEMENTS56

CHANGING THE BUCKET

To avoid personal injury:
A When the coupling pins are removed or

installed, chips may come off. Always use
gloves, goggles and a helmet.

A When the change of the equipment must be

performed with the engine running, always
work as a 2-person team.
One person sits in the operator's seat and the
other works on the machine.

A Do not use your fingers to center the holes,

since they may be injured or even cut in case of
sudden or uncontrolled movements.

A Read the manual of the attachment to do a

correct operation safely when other
attachments are installed instead of Kubota
specified bucket.

FUSES

BReplacing Fuses

1. Remove the cover of the fuse box.

2. Replace the burnt out fuse with a fuse having the same
capacity.

5A Meter (+B)

20A Work lamp 5A Starter

5A Room lamp

5A ECU (+B) 30A Engine stop

10A Horn 5A Fuel pump

10A ECU (AC)

5A Relay

15A Auxiliary 1 10A Alternator

15A Auxiliary 2 5A Lever lock

15A Electrical outlet 5A Horn SW

BSlow Blow Fuse

Slow blow fuse is provided to protect the electrical circuits.
If the fusible link is blown, check the electrical circuits for
trouble and then replace with a new compatible slow blow
fuse.

BFuse Capacities and Circuits

(1) Fuse box

(1) Slow blow fuse (60A)

(2) Slow blow fuse (50A)

57TROUBLESHOOTING

TROUBLESHOOTING

If the excavator dose not show the desired performance, or when trouble arises, refer to the table below and undertake
appropriate measures.

Trouble Cause Countermeasure

*Check fuel tank and filter
*Remove impurities and water
*If necessary, replace filter

*Remove water from the fuel tank
*Check fuel pipe joint bolts and nuts for looseness
*Purging of the fuel system (for fuel filter and injection
pump, see "PURGING OF THE FUEL SYSTEM" in "OTHER
ADJUSTMENTS AND REPLACEMENTS".)

*Pour hot water over the radiator

*Recharge battery

*Check fuel and add if necessary

*Clean the air filter element

*Check fuel and add if necessary
*Purge the fuel system

*Use high quality fuel

*Drain engine oil to prescribed oil level

*Adjust or replace

*Fill to prescribed level

*Clean

*Replace coolant fluid and add anti-rust

*Replace

*Clean

*Reduce load

*Fill to prescribed level

*Use prescribed fuel

*Add oil

*Replace hose or joint

*Bring lock lever into "UNLOCK" position

*Remove

*Adjust accordingly

*Bring lock lever into "UNLOCK" position

Engine

Hydraulic

System

Drive

System

Starting difficulties

Insufficient engine
power

Engine suddenly
stops

Abnormal exhaust
gas color

Water temperature
too high
(Overheating)

Boom, arm, bucket,
drive, swing and
dozer power is too
low

Swing motor and
front attachment
does not work

Deviation of drive
direction

Drive lever does
not move

Fuel is too viscous

Air or water in the fuel
system

Oil viscosity is too high the
engine runs sluggishly in
winter

Battery is almost dead;
insufficient compression

Low fuel level

Clogged air cleaner

Low fuel level

Poor fuel

Too much engine oil

Worn or torn fan belt

Coolant level too low

Radiator grill or fins are
clogged

Coolant is contaminated
with rust from the cylinder
head or crank case

Defective radiator cap
(Evaporation)

Corroded coolant pipes

Continuous operation
under full load

Engine oil level too low

Use of poor fuel

Hydraulic oil level too low

Leakages of hoses and /
or joints

Lock lever in "LOCK"
position

Blocked through stones

Track too loose or too
tight

Lock lever in "LOCK"
position

58 TROUBLESHOOTING

KUBOTA I.C.S. NAVIGATION LIST OF ERROR CODE

If an error occurs with the machine, one of the following error codes appears in the LCD display.
In case of a trouble, immediately contact your local dealer for inspection and repair.

LCD display LED Problem / Error Solution #1 Solution #2

The Controller Area

CAN system error

1

Feed fuel

2

Network (CAN) has
developed a fault.
Measured values may
be incorrect and
switches may not
function.

This message
appears when the fuel
level is low and
prompts the operator
to refuel.

The machine can be
started and driven.
Do not perform any
work with the
machine.

---

Inform your
KUBOTA dealer
immediately.

Refuel the
excavator.

This message

Periodic check soon

3

Periodic check passed

4

Warning temperature

5

6 --- --- --- --- ---

7 --- --- --- --- ---

(notice)

(warning)

rising

appears 10 hours
before the periodic
check interval.
This message means
that the regular
service is due shortly.

This message means
that the regular
service is due.

The temperature of
the coolant is higher
than normal.

Operate the
machine as usual.

The machine can be
operated but service
must be carried out
urgently.

Operate the
machine only with
reduced loads until
the temperature is
normal again.

Ask your
KUBOTA dealer
about the
relevant parts.
Run the
maintenance
procedure.

Ask your
KUBOTA dealer
about the
relevant parts.
Run the
maintenance
procedure.

---

8 --- --- --- --- ---

LCD Display LED Problem / Error Solution #1 Solution #2

59TROUBLESHOOTING

Clock setting request

9

10 --- --- --- --- ---

Raise the control lever

11

12 --- --- --- --- ---

Lower the control lever

13

Oil pressure too low

14

15

lock

(yellow)

lock

(yellow)

(red)+The engine oil

Overheat

Power was interrupted
and the clock now has
to be set again.

This message
indicates a step in a
procedure.

This message
indicates a step in a
procedure.

pressure is too low.

The machine is
overheated and must
cool off by idling.

In order to set the
clock, press the user
setting switch.

Raise the lock lever
(unload lever); the
indicator goes out.

Lower the lock lever
(unload lever); the
indicator goes out.

Stop the engine
immediately. The
engine may have
developed a fault.

Allow the machine to
cool off by idling. Do
not switch the
engine off as the
coolant could then
boil over.

---

---

---

Inform your
KUBOTA dealer
immediately.

Clean the
radiator and
check the
coolant. Refill
the radiator with
coolant by its
boiled-over
amount. Unclog
the radiator and
other
components
before use
again.
Check also the
hydraulic system
for oil leak and
other troubles.
If an oil leak is
found,
immediately
contact your
local dealer for
repair.

60 TROUBLESHOOTING

LCD Display LED Problem / Error Solution #1 Solution #2

Charging system error

16

Fuel sensor error

17

Water temperature sensor

error

18

19 --- --- --- --- ---

Lever lock system error

20

(red)+The charging system

has developed a fault.

The fuel sensor has
developed a fault; the

(red)

(red)

(red)

fuel gauge does not
appear in the display.

The coolant
temperature sensor
has developed a fault;
the coolant
temperature gauge
does not appear in the
display.

The electrical system
in the lock lever
(unload lever) has
developed a fault.

Check the V-belt.
When the V-belt is
OK, let the engine
run until the indicator
goes out.

Press the display
selector switch to
return to the default
display.

Press the display
selector switch to
return to the default
display. The
functions of the
machine are stable
but overheating
cannot be excluded.

The engine can be
started but the
machine cannot be
set in motion.

If the indicator
does not go out,
inform your
KUBOTA dealer
immediately.

Inform your
KUBOTA dealer
immediately.

Inform your
KUBOTA dealer
immediately.

Inform your
KUBOTA dealer
immediately.

Travel 2 speed system

error

21

(red)

22 --- --- --- --- ---

23 --- --- --- --- ---

24 --- --- --- --- ---

The electrical system
in the travel speed has
developed a fault.

The machine can
only be set in motion
at low speed.

Inform your
KUBOTA dealer
immediately.

LCD Display LED Problem / Error Solution #1 Solution #2

This is a warning that a
higher voltage (from a

Overvoltage

25

(red)

26 --- --- --- --- ---

24-V battery, for
example) is being
applied to the electric
circuit, or that there is
a problem with the
alternator.

Switch the engine off
immediately and
check the battery
and the alternator.
Restart the engine.

If the indicator
lights up again
after restarting,
inform your
KUBOTA dealer
immediately.

61TROUBLESHOOTING

External 5-V system error

27

External 12-V system

error

28

Starting the engine

29

(red)

(red)

(yellow)

The 5-V sensor supply
line has developed a
system fault. The main
functions are not
available.

The 12-V sensor
supply line has
developed a system
fault. The main
functions are not
available.

This error code
indicates a step in a
procedure.

The machine can be
started and driven.
Do not perform any
work with the
machine.

The machine can be
started and driven.
Do not perform any
work with the
machine.

Start the engine; the
indicator goes out.

Inform your
KUBOTA dealer
immediately.

Inform your
KUBOTA dealer
immediately.

---

62 TROUBLESHOOTING

C Service hour meter

When the hour meter has counted up to the hours circled in the maintenance list below, the message appears. The
message shows up as follows.

No. Check points Measures

50 100 250 500 600 750 1000

Hour meter indicator

Interval

1 Engine oil

2 Hydraulic oil every 1000 hrs

Air filter

3

element

4 Drive unit oil change every 500 hrs

5 Engine oil filter

6

7

The message appears. The message shows up as follows.

(The message reappears on the hour meter designated next.)

Hydraulic return filter

Hydraulic suction filter

Outer element

Inner element every 1000 hrs

cartridge

element

change

replace

replace

every 500 hrs

every 1000 hrs

every 500 hrs

every 500 hrs

every 1000 hrs

First operation

A The maintenance message disappears automatically in about 10 seconds.
A When the key is turned from OFF to RUN, the maintenance message reappears and disappears again automatically in

about 10 seconds.

A When the key is turned from OFF to RUN repeatedly 10 times, the message disappears.

C In case the service hour meter replaced due to any trouble with it, the meter is set to "0". Contact your KUBOTA dealer

for details.

63OPERATION UNDER COLD WEATHER CONDITIONS

OPERATION UNDER COLD WEATHER CONDITIONS

PREPARATION FOR OPERATION IN COLD WEATHER

1. Replace engine oil and hydraulic oil with those of
viscosities suitable for cold weather.

2. In cold weather, battery power drops, and the battery
fluid may freeze if the battery is not sufficiently
charged. To prevent the battery fluid from freezing, be
sure to keep the battery charged at least 75% or more
of its capacity after operation. To ease next starting, it
is recommended to keep the battery stored in closed
or heated rooms. If the battery fluid level is too low, do
not add after operation, but add with the engine
running before the next operation.

3. Add anti-freeze to coolant in the radiator and recovery
tank, if the ambient temperature is expected to drop
below 0 (32 ). Mixing ratio of water and anti-freeze
depends on the expected ambient temperature.

A Mixing ratio between water and anti-freeze

Ambient
Temperature ( )-5(+23)

Antifreeze % 30303035404550

Water % 70707065605550

-10

(+14)

-15

(+5)

-20
(-4)

-25

(-13)

-30

(-22)

-35

(-31)

PROCEDURE AFTER DONE WORK

Clean the excavator thoroughly after work and wipe dry.
Otherwise mud and earth on the tracks could freeze if the
temperature drops below the 0 (32 ) mark. Operation
of the excavator is then not possible. Store the excavator
in a dry place; if not possible, store on wooden planks or
on mats. If the excavator is kept on damp or muddy
ground, the tracks could freeze overnight. Operation of
the excavator is then not possible. Furthermore the
reduction gear may be damaged.
Additionally, the piston rods of the hydraulic cylinders
must be rubbed dry. Otherwise severe damage could
occur if dirty water seeps through the seals.

A Use permanent anti-freeze or long-life coolant.
A Drain the coolant completely and clean the inside of

the radiator, then fill with the water and anti-freeze
mixture.

A The anti-freeze acts as an anti-corrosive, it is not

necessary to add an additive to the water and anti­freeze mixture.

A See "Coolant check" under "DAILY CHECKS" in

"MAINTENANCE" for radiator fill volumes.

64 LONG STORAGE

LONG STORAGE

To avoid personal injury:

A Do not clean the excavator with the engine running.
A To avoid the danger of exhaust fume poisoning, do not operate the engine in a closed building without

proper ventilation.

A When storing, remove the key from the starter switch to avoid unauthorized persons from operating the

excavator and getting injured.

A Bring the excavator on a firm, flat, and level surface. Lower the attachments and dozer blade on the ground.

B Should the Excavator be Stored for a Longer Period of Time, Observe Following Procedures:

1. The whole excavator should be cleaned thoroughly and in all cases stored indoors. If the excavator has to be kept
outdoors, lay out wooden planks on even ground, place the excavator on the planks and cover completely.

2. Do an oil change and grease the excavator.

3. Heavily grease the visible section of the cylinder rods.

4. Remove the battery and store indoors.

5. If it is expected that the temperature will sink below the 0 (32 ) mark, add anti-freeze or drain coolant completely.

A Wash the excavator after stopping the engine.

If you wash the excavator while running the engine, splashing water gets into the air cleaner through its intake and
cause engine damage.
Carefully wash and do not splash water over the air cleaner while the engine is running.

B Observe Following Procedures when the Machine is to be Operated after Long Storage.

1. Wipe off the grease from the hydraulic cylinder rods.

2. Turn on the engine and operate the attachments and the drive mechanisms under no load in order to circulate the
hydraulic oil.
(If the machine is stored for longer than one month, do steps 1 and 2 once every month.)

65LONG STORAGE

Periodic replacement of important component parts

To ensure safety in operation, you are strongly requested to inspect and service the machine at regular intervals. For added
safety, ask your KUBOTA dealer to replace the following important component parts.
These parts are prone to degradation in material or subject to wear and tear with time. It is difficult to judge how much they
have been affected at regular inspection. It is therefore necessary to replace them with new ones, whether wear is visible
or not after a specified time of use.
If any of them is found to be worn before the specified use, they must be repaired or replaced the same as other parts.
If any of the hose clamps are found deformed or cracked, the hose clamps must also be replaced.
For the hydraulic hoses other than the ones to be replaced periodically, inspect them for the following points. If found loose
or very worn, tighten and / or replace the hose.
When replacing the hydraulic hoses, change their O rings and sealing components with new ones.
For replacement of the important parts, contact your KUBOTA dealer.

A At the following periodic inspections, check the fuel hoses and hydraulic hoses as well.

Inspection Interval Check points

Daily Checks Oil leak at fuel and hydraulic hose connections and points

Every month

Every year

Oil leak at fuel and hydraulic hose connections and points
Damages at fuel and hydraulic hose (cracks, chafing)

Oil leak at fuel and hydraulic hose connections and points
Interference, deformation, degradation, twist and other damages (cracks, chafing) of fuel and hydraulic
hoses

List of important component parts

No. Component parts Used place Q'ty Period

Fuel tank - Water separator 1

Water separator - Fuel filter 1

1 Fuel hose

2 Hydraulic hose (suction) Tank - Main pump 1

3 Hydraulic hose (delivery)

4 Hydraulic hose (Boom cylinder) Control valve - Boom cylinder *2

5 Hydraulic hose (Arm cylinder)

6 Hydraulic hose (Bucket cylinder)

7 Hydraulic hose (Swing cylinder) Control valve - Swing cylinder 2

8 Hydraulic hose (Dozer cylinder)

9 Hydraulic hose (Service port)

10 Hydraulic hose (Swivel motor) Control valve - Swivel motor 2

Fuel filter - Fuel pump 1

Fuel pump - Fuel nozzle 1

Fuel nozzle - Fuel tank 2

Main pump - Control valve 3

Main pump - Pilot filter 1

Pilot filter - Change valve 2

Control valve - Pipe, Boom *2

Pipe, Boom - Arm cylinder *2

Control valve - Pipe, Boom *2

Pipe, Boom - Bucket cylinder *2

Control valve - Rotary joint 2

Rotary joint - Pipe 2

Pipe - Dozer cylinder 2

Control valve - Pipe, Boom *2

Pipe, Boom - Pipe, Boom *2

Pipe, Boom - Pipe, Arm *2

Every 2 years or
4000 hours

To prevent serious damage to the hydraulic system, use only a KUBOTA genuine hydraulic hose.
(Since especially * marks are super wear resistance hoses, please surely use a KUBOTA genuine hydraulic hose.)

66 RECOMMENDED OILS

RECOMMENDED OILS

1. Before delivery the hydraulic oil used was Shell Tellus S2M46.

2. Use engine oil API service classification CF/CF-4 or better and SAE10W-30.

3. Use SAE 90 (API, GL-4/GL-5) as drive unit oil for all seasons.

C Engine Oil:

A Oil used in the engine should have an American Petroleum Institute (API) service classification and Proper SAE

Engine Oil according to the ambient temperatures.

Above 25 (77 ) SAE 30 or SAE 10W-30, SAE 15W-40

0 to 25 (32 to 77 ) SAE 20 or SAE 10W-30, SAE 15W-40

Below 0 (32 ) SAE 10W or SAE 10W-30, SAE 15W-40

A Refer to the following table for the suitable API classification engine oil according to the engine type (with internal

EGR, external EGR or non-EGR) and the fuel.

67RECOMMENDED OILS

Fuel used

Ultra Low Sulfur Fuel
[<0.0015% (15 ppm)]

EGR: Exhaust Gas Re-circulation
A The CJ-4 engine oil is intended for DPF (Diesel Particulate Filter) type engines, and cannot be used on this

machine.

Model U25 ---

C Fuel:

A Cetane number of 45 is minimum. Cetane number greater than 50 is preferred, especially for temperatures below

-20 (-4 ) or elevations above 1500 m (5000 ft).

A Diesel fuels specified to EN 590 or ASTM D975 are recommended.
A No.2-D is a distillate fuel of lower volatility for engines in industrial and heavy mobile service. (SAE J313 JUN87)

Oil class of engines except external EGR Oil class of engines with external EGR

CF, CF-4, CG-4, CH-4 or CI-4

except external EGR with external EGR

Engine oil classification (API classification)

CF or CI-4
(Class CF-4, CG-4 and CH-4 engine oils
cannot be used on EGR type engines)

68 MAIN DIMENSIONS

MAIN DIMENSIONS

U25

CANOPY

U25

CANOPY

mm (in.)

(A) (B) (C) (D) (E) (F) (G) (H) (I) (J)

590

(23.2)

(K) (L) (M) (N) (O) (P) (Q) (R) (S) (U)

1900

(74.8)

620

(24.4)

2420

(95.3)

1500

(59.1)

360

(14.2)

760

(29.9)

320

(12.6)

1300

(51.2)

3160

(124.4)

1500

(59.1)

990

(39.0)

4530

(178.3)

4150

(163.4)

3200

(126.0)

4670

(183.9)

2810

(110.6)

4780

(188.2)

1960

(77.2)

800

(31.5)

69LIFTING CAPACITY

LIFTING CAPACITY

1. The lifting capacities are based on ISO 10567 and do not exceed 75% of the static tilt load of the machine or 87% of
the hydraulic lifting capacity of the machine.

2. The strokes are as follows.
(1) The load point corresponds to the front bolt part of the arm.
(2) The machine positions are (i) over - front (Blade down), (ii) over - front (Blade up), and (iii) over - side.
(3) The operating cylinder is the boom cylinder.

3. The bucket of the excavator, the hook, the sling and other lifting accessories are taken into consideration for the loads.

Machine conditions:
No bucket, all others according to the standard regulations.

To avoid personal injury or death:

A No loads greater than those values mentioned in the lifting capacity tables are to be lifted.
A No loads greater than 1 ton are to be lifted when no safety devices are attached to boom and dozer blade

cylinders.

A The values mentioned in the table are valid only on even, hard grounds. When lifting on soft ground, the

machine can tip over due to the load being concentrated only on one side of the machine.

A The table values are calculated at the end of the arm without the bucket. In order to find the allowable loads

for machines with bucket, the bucket weight must be subtracted from the values in the table.

A In this manual, the machine's lifting capacity is

discussed, but it does not mean that it is
recommended to use the machine for lifting jobs.

A It is specified in Item 3.4 of ISO 10567:1992 that

the following devices must be additionally
installed if a hydraulic excavator with the rated
lift load of over 1,000 kg at its minimum lifting
radius or the tilting moment of over 40,000 N-m
is used for lifting loads.
(1) Lifting hook
(2) Acoustic alarm or warning lamp for the

operator when the rated load or the
corresponding tilting moment has been
exceeded.

(3) Boom descending control device

conforming to ISO 8643:1997

70 LIFTING CAPACITY