Incorrect operation and maintenance of this machine
may be hazardous and cause injuries. The operator and
maintenance personnel must read this manual before
commencing operation or maintenance. Keep this
manual within reach at all times and ensure that
operating personnel read it at regular intervals.
-5H
NOTE
Komatsu has had the operating and maintenance instructions
translated into all the languages of the European Union.
Should you require a copy in another language please inquire
at your local dealer’s
.
FOREWORD
11
FOREWORDFOREWORD
FOREWORD1
This manual provides rules and guidelines which will help you use this machine safely and effectively. The precautions in this manual must be followed at all times when performing operation and maintenance. Most accidents
are caused by the failure to follow fundamental safety rules for the operation and maintenance of machines. Accidents can be prevented by knowing beforehand conditions that may cause a hazard when performing operation
and maintenance.
WARNING
Operators and maintenance personnel must always do as follows before beginning operation or maintenance.
Always be sure to read and understand this manual thoroughly before performing operation and maintenance.
Read the safety messages given in this manual and the safety labels affixed to the machine thoroughly
and be sure that you understand them fully.
Keep this manual at the storage location for the Operation and Maintenance Manual given below, and have
all personnel read it periodically.
If this manual has been lost or has become dirty and cannot be read, request a replacement manual immediately from Komatsu or your Komatsu distributor.
If you sell the machine, be sure to give this manual to the new owners together with the machine.
Komatsu delivers machines that comply with all applicable regulations and standards of the country to
which it has been shipped. If this machine has been purchased in another country or purchased from
someone in another country, it may lack certain safety devices and specifications that are necessary for
use in your country. If there is any question about whether your product complies with the applicable
standards and regulations of your country, consult Komatsu or your Komatsu distributor before operating
the machine.
Storage location for the Operation and Maintenance Manual:
Pocket (1) at rear of operator's seat
1-2
FOREWORDFOREWORD
EU DIRECTIVES0.
Machines supplied by us fulfil the Directive for Machinery 89/392/EEC and all supplements. If the machine is being
used in another country, it is possible that certain safety regulations and specifications may not be fulfilled for use
in that country. For example, priority vehicle warning lamps may be used in some countries, but are forbidden in
others.
Please contact our dealer before using the machine if you have any questions regarding the fulfilment of standards
and regulations in a specific country.
Notes on subsequent installation of electrical and electronic equipment and components
Electrical and electronic equipment and/or components which have been installed subsequently, emit electromagnetic radiation which can influence the function of the electronic components and sections of the machine. This
can have an influence on the safety of the machine and endanger persons. For this reason, please ensure that the
following safety instructions are observed.
If you are installing electrical or electronic equipment and/or components in the machine and connect them to the
vehicle electrical system, you must check at own responsibility that the installations do not cause any disturbance
to the vehicle’s electronic system or other components. Above all, you must ensure that any subsequently installed
electrical and electronic components comply with the EMV Directive 89/336/EEC in its current edition and bear the
CE mark.
The following requirements also have to be met for subsequent installation of mobile communication systems (e.g.
radio, telephone):
q Only equipment approved by national legislation (e.g. BZT approval for Germany) may be used
q The unit must be fixed in position
q Portable or mobile units may only be used inside the vehicles if they are connected to a fixed outside
antenna
q The transmitter unit must be spatially separated from the vehicle’s electronic system
q Make sure when installing the antenna that this is installed correctly with good earth connection between
antenna and vehicle mass
Also observe Komatsu and manufacturer’s installation instructions for wiring, installation and maximum permitted
power consumption.
1-3
SAFETY INFORMATIONFOREWORD
SAFETY INFORMATION1
To enable you to use this machine safely, safety precautions and labels are given in this manual and affixed to the
machine to give explanations of situations involving potential hazards and of the methods of avoiding such situations.
Signal words
The following signal words are used to inform you that there is a potential hazardous situation that may lead to personal injury or damage.
In this manual and on machine labels, the following signal words are used to express the potential level of hazard.
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, may result in minor or moderate injury. This word is used also to alert against unsafe practices that may cause property damage.
Example of safety message using signal word
WARNING
When standing up from the operator's seat, always place the safety lock lever in the LOCK position.
If you accidentally touch the control levers when they are not locked, this may cause a serious injury or
death.
Other signal words
In addition to the above, the following signal words are used to indicate precautions that should be followed to protect the machine or to give information that is useful to know.
This word is used for precautions that must be taken to avoid actions which could shorten
the life of the machine.
1-4
This word is used for information that is useful to know.
FOREWORDSAFETY INFORMATION
Safety labels
Safety labels are affixed to the machine to inform the operator or maintenance worker on the spot when carrying
out operation or maintenance of the machine that may involve hazard.
For details of safety labels, see "SAFETY LABELS (2-3)".
Safety labels using pictogram
Safety pictograms use a picture to express a level of hazardous condition equivalent to the signal word. These safety pictograms use pictures in order to let the operator or maintenance
worker understand the level and type of hazardous condition at
all times. Safety pictograms show the type of hazardous condition at the top or left side, and the method of avoiding the hazardous condition at the bottom or right side. In addition, the
type of hazardous condition is displayed inside a triangle and
the method of avoiding the hazardous condition is shown
inside a circle.
Komatsu cannot predict every circumstance that might involve
a potential hazard in operation and maintenance. Therefore,
the safety messages in this manual and on the machine may
not include all possible safety precautions.
If any procedures or actions not specifically recommended or
allowed in this manual are used, it is your responsibility to take
the necessary steps to ensure safety.
In no event should you engage in prohibited uses or actions
described in this manual.
The explanations, values, and illustrations in this manual were
prepared based on the latest information available at that time.
Continuing improvements in the design of this machine can
lead to changes in detail which may not be reflected in this
manual. Consult Komatsu or your Komatsu distributor for the
latest available information of your machine or for questions
regarding information in this manual.
The numbers in circles in the illustrations correspond to the
numbers in ( ) in the text. (For example: 1 -> (1))
1-5
INTRODUCTIONFOREWORD
INTRODUCTION1
This loader is a machine with independent transmission, moving on chains or wheels. Driving in forward direction,
the loader can load or dig material using its attachments intended for loading operations (i.e. bucket).
The standard operation cycle of a loader includes filling up and loading of the bucket, transporting the material and
emptying the bucket.
INTENDED USE
If you use the machine for any other purpose than specified above, we will not accept any responsibility for safety.
All considerations concerning safety will then be up to the owner or the operating and maintenance personnel. In
any case, neither you nor any other person are/is authorised to perform work and functions explicitly prohibited in
these operating instructions.
The transport of persons in the work equipment is strictly forbidden!
For details of the operating procedure, see “WORK POSSIBLE USING WHEEL LOADER (3-86)“.
DIRECTIONS OF MACHINE1
Front
Bucket
RightLeft
Rear
In this manual, the directions of the machine (front, rear, left, right) are determined according to the view from the
operator's seat in the direction of travel (front) of the machine.
1-6
FOREWORDNECESSARY INFORMATION
NECESSARY INFORMATION1
When requesting service or ordering replacement parts, please inform your Komatsu distributor of the following
items.
MACHINE SERIAL NO. PLATE AND POSITION1
On the center right of the front frame.
ENGINE SERIAL NO. PLATE AND POSITION1
This is on the side face of the engine cover on the right side of the machine.
EPA: Environmental Protection Agency, U.S.A.
1-7
NECESSARY INFORMATIONFOREWORD
ROPS/FOPS-CAB SERIAL NO. PLATE
This plate is located on the right inside cab on the rear beam.
AXLE SERIAL NO. PLATE
This plate is located on the right of front axle and on the left of
rear axle.
TRANSMISSION SERIAL NO. PLATE
This plate is located in travel direction front, above the
transmission output.
SEAT OPERATOR SERIAL NO. PLATE
This plate is located in front of seat, covered by the bellows.
1-8
FOREWORDNECESSARY INFORMATION
POSITION OF SERVICE METER1
It is at the center bottom of the machine monitor.
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR1
Machine serial No.
Engine serial No.
Distributor name
Address
INTENDED USE ............................................................................................................................................ 1-6
DIRECTIONS OF MACHINE ......................................................................................................................... 1-6
NECESSARY INFORMATION ........................................................................................................................... 1-7
MACHINE SERIAL NO. PLATE AND POSITION .......................................................................................... 1-7
ENGINE SERIAL NO. PLATE AND POSITION ............................................................................................. 1-7
ROPS/FOPS-CAB SERIAL NO. PLATE ........................................................................................................ 1-8
AXLE SERIAL NO. PLATE ............................................................................................................................ 1-8
TRANSMISSION SERIAL NO. PLATE .......................................................................................................... 1-8
SEAT OPERATOR SERIAL NO. PLATE ....................................................................................................... 1-8
POSITION OF SERVICE METER.................................................................................................................. 1-9
TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR ................................................................................. 1-9
LOCATION OF SAFETY LABELS ................................................................................................................. 2-3
PRESENTATION OF SAFETY LABELS........................................................................................................ 2-4
GENERAL PRECAUTIONS ............................................................................................................................... 2-7
PRECAUTIONS FOR OPERATION ................................................................................................................. 2-17
PRECAUTIONS FOR MAINTENANCE ............................................................................................................ 2-29
PRECAUTIONS WITH TIRES .......................................................................................................................... 2-36
OPERATION
GENERAL VIEW ................................................................................................................................................ 3-2
GENERAL VIEW OF MACHINE .................................................................................................................... 3-2
GENERAL VIEW OF CONTROLS AND GAUGES........................................................................................ 3-3
EXPLANATION OF COMPONENTS.................................................................................................................. 3-5
POWER OUTLET ........................................................................................................................................ 3-48
AIR CONDITIONER ..................................................................................................................................... 3-49
GENERAL LOCATIONS AND FUNCTION OF CONTROL PANEL ....................................................... 3-49
METHOD OF OPERATION .................................................................................................................... 3-52
PRECAUTIONS WHEN USING.............................................................................................................. 3-53
BEFORE STORAGE.................................................................................................................................. 3-110
DURING STORAGE .................................................................................................................................. 3-110
AFTER STORAGE..................................................................................................................................... 3-110
WHEN MACHINE RUNS OUT OF FUEL...................................................................................................3-111
TOWING THE MACHINE........................................................................................................................... 3-111
WHEN ENGINE CAN BE USED........................................................................................................... 3-112
WHEN ENGINE CANNOT BE USED ................................................................................................... 3-112
IF BATTERY IS DISCHARGED ................................................................................................................. 3-113
REMOVAL AND INSTALLATION OF BATTERY.................................................................................. 3-113
PRECAUTIONS FOR CHARGING BATTERY ..................................................................................... 3-114
STARTING ENGINE WITH BOOSTER CABLE ................................................................................... 3-115
OTHER TROUBLE..................................................................................................................................... 3-117
ELECTRICAL SYSTEM ........................................................................................................................ 3-117
GUIDES TO MAINTENANCE ............................................................................................................................. 4-2
OUTLINES OF SERVICE ................................................................................................................................... 4-4
HANDLING OIL, FUEL, COOLANT, GREASE AND CARRYING OUT KOWA (Komatsu Oil Wear Analysis)4-4
WEAR PARTS LIST....................................................................................................................................... 4-8
FUEL, COOLANT AND LUBRICANTS.............................................................................................................. 4-9
PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS ............................................................ 4-10
STANDARD TIGHTENING TORQUES FOR BOLTS AND NUTS................................................................... 4-15
TORQUE LIST ............................................................................................................................................. 4-15
PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS ........................................................................ 4-16
SERVICE PROCEDURE .................................................................................................................................. 4-19
INITIAL 250 HOURS SERVICE ................................................................................................................... 4-19
WHEN REQUIRED ...................................................................................................................................... 4-20
CHECK, CLEAN, OR REPLACE AIR CLEANER ELEMENT ................................................................. 4-20
CHECK WATER PUMP .......................................................................................................................... 4-61
TECHNICAL DATA
TECHNICAL DATA ............................................................................................................................................ 5-2
CHANGING THE LUBRICATION INTERVAL TIMES.................................................................................. 6-65
INDEX
INDEX ................................................................................................................................................................. 7-3
Material densityt/m³1,8
Bucket weight without teethkg1.040
Static tipping load, straightkg12.000
Static tipping load, 40° anglekg10.355
Breakout force, hydraulickN134
Lifting capacity, hydraulic, on groundkN155
Operating weight *)kg14.040
aReach at 45° dischargemm990
bDumping height at 45° dischargemm2.855
cLift height, hinge pinmm3.910
dHeight to upper edge of bucketmm5.260
eDigging depthmm105
AOverall length, bucket on groundmm7.475
BWheel basemm3.030
CBucket widthmm2.740
DWidth over tyresmm2.525
EGaugemm2.050
FGround clearancemm440
HOverall heightmm3.200
F
B
A
WA320-5Abm
These values refer to machines with 20.5 R25
L3
*) Machine without additional counterweight
1-17
CE-CONFORMING EQUIPMENTFOREWORD
CE-CONFORMING EQUIPMENT
CE-CONFORMING EQUIPMENT
CE-conforming equipment
12 345–
TypePart N o.
BucketWA320-5H
Volume
m³
419-72-H21002,71.040
419-72-H21102,71.143
419-72-H21602,71.118
419-72-H21702,72.217
419-72-H21202,851.254
419-72-H21802,851.325
419-72-H21303,01.265
419-72-H21403,01.363
419-72-H21503,11.472
Load
Capacity
kg
Hydraulic
pressure
bar
Weight
kg
1
2
3
4
5
GK100392
1-18
FOREWORDCE-CONFORMING EQUIPMENT
MANUFACTURER-SUPPLIED CE-CONFORMING EQUIPMENT, ACCORDING
TO DOCUMENT 421-93-H1900
The responsibility for observing valid regulations in the case of
wheel loaders with "interchangeable equipment" (e.g. bucket or
fork-lift) which was not supplied from works lies with the customer which was subsequently fitted to the machine.
The directives for CE conformity and road-traffic registration
are deemed to have been fulfilled when the manufacturer of the
equipment confirms fulfilment of the form 421-93-H1900 alongside.
The certification must be sent to the customer and the wheel
loader manufacturer. The CE conformity declaration for a specific wheel loader is only legally valid once this has taken place.
The dimensions X1, X2, Y1 and Y2 must be provided by the
customer for approval for use on public roads. (valid in Germany)
The dimension Sh (smallest tyre radius) must be added to the
dimension D2.
The figure G (in kg) represents the maximum load (equipment
and operating load) which may act upon this point.
A2
D2
Y2
X2
X1
Y1
G
A1
Sh
Sh
GK100395b
1-19
CE-CONFORMING EQUIPMENTFOREWORD
1
B1
2
H2
H1
J
D1
C1
D2
Sh
B2
C2
A2
G
A1
d1=d2
3
Sh
b3
e
2
d
3
1
d
c
1-20
b4
b1
h
b2
GK100395
FOREWORDCE-CONFORMING EQUIPMENT
MANUFACTURER- SUPPLIED CE-CONFORMING
EQUIPMENT, ACCORDING TO DOCUMENT 421-93-H1900
WA320-5H421-93-H1900
A1 Distance: bucket pivoting point - front axle, horizontal
A2 Distance: bucket pivoting point - front axle, vertical
Sh Distance: road level - front axle
B1 Distance: driver's eye (1) - front axle, horizontal
B2 Distance: driver's eye (1) - front axle, vertical
C1 Distance: centre steering wheel - centre front axle,
horizontal
C2 Distance: center steering wheel - centre front axle,
vertical
D1 Distance: headlight - centre front axle, horizontal
D2 Distance: headlight - centre front axle, vertical
GWeight of equipment and working load
H1 Distance: bucket pivoting point - bucket upper edge, verti-
cal (carrying position)
H2 Distance: bucket pivoting point - vision line, vertical (carry-
placed
hDistance: bucket bottom edge - boom bolt hole
l Distance: centre of bolt -- centre of fastening screw
A11930
A21260
Sh700
B11850
B22131
C11425
C21766
D1507
D21323
G 6400
H11347
H21651
J270
X12710
X21157
Y12493
Y21042
b11032
b2108
b3109
b4461,5
c370
d175
d275
e0
h280
l80
1Driver’s eye
2Vision line
3Bolts
Tyres
Bucket
MICHELIN
20.5R25 XHA
2,7 m³
419-72-H2110
1-21
CE-CONFORMING EQUIPMENTFOREWORD
1-22
SAFETY
12
SAFETY
2-2
SAFETYSAFETY LABELS
SAFETY LABELS2
The following safety labels are used on this machine. Be sure that you fully understand the correct position and
content of these safety labels.
Always keep all safety labels clean. When cleaning them, use soap and water. Do not use organic solvents or gasoline. These may cause the safety labels to peel off.
Missing or damaged safety labels must be replaced. Order the new part from your Komatsu distributor.
LOCATION OF SAFETY LABELS2
2-3
SAFETY LABELSSAFETY
PRESENTATION OF SAFETY LABELS2
1Precautions before starting operation, inspec-
tion and maintenance (421-93-H1250)
WARNING!
Read the Operator’s
Manual before startung operation, inspection, maintenance or
transportation.
3Precautions when traveling in reverse
(421-93-H1360)
2Precautions before leaving the machine
(421-93-H1290)
Sign indicates a hazard
of unexpected moving
of stopped machine.
Lower working device
to ground, move safety
lever to lock position
and take engine key
with you before leaving
machine.
4Use Komatsu oil only
(421-93-H1390)
Sign indicates to prevere severe injury or
death
Honk to alert people
nearby. Be sure no one
is on or near machine.
Use spotter if view is
obstructed.
2-4
SAFETYSAFETY LABELS
5Do not enter (421-93-H1320)6Precautions for safety bar (421-93-H1330)
Sign indicates a crush
hazard between the
articulating parts of the
vehicle.
Keep away from the
vehicle when it is
move.
7Precautions when coolant is at high tempera-
ture (421-93-H1280)
Sign indicates a burn
hazard from spurting
hot water if radiator is
uncapped while hot.
Sign indicates a crush
hazard between the
articulating parts of
vehicle.
Lock vehicle with lock
bar to avoid movement
during maintenance,
inspection and transportation.
8Precautions when oil is at high temperature
(421-93-H1280)
Sign indicates a burn
hazard from spurting
hot oil if hydraulic oil
tank is uncapped while
hot.
Allow coolant to cool
before removing cap.
9Precautions when handling battery cable
(421-93-H1310)
Sign indicates an electric hazard from handling the cable.
Read manual for safe
and proper handling.
Allow hydraulic oil to
cool before removing
cap.
10High pressure warning (421-93-H1300)
There is a hazard of
explosion injury.
Do not disassembly the
accumulator, make
holes in it, weld it cut it,
hit it, roll it or bring it
near flame.
2-5
SAFETY LABELSSAFETY
11Do not climb on fender (421-93-H1400)12Do not open when engine is running
(09667-A0880)
Sign indicates a hazard
of falling.
Do not stand on this
place here.
13“Do not come under machine“ sign
(421-93-H1370)
Sign indicates a hazard
of being run over by
moving vehicle.
Sign indicates a hazard
of rotating parts, such
as belt.
Turn off engine before
inspection and maintenance.
14“Do not go under work equipment“ sign
(421-93-H1380)
Sign indicate a crush
hazard from falling off
of working device.
Keep a safe distance
from vehicle when it is
moving.
16Only start machine from driver's seat
(09842-A0481)
Keep away when the
working device is
raised.
17Safety measures before starting work
(421-93-H1340)
2-6
SAFETYGENERAL PRECAUTIONS
GENERAL PRECAUTIONS2
SAFETY RULES
q Only trained and authorized personnel can operate and maintain the machine.
q Follow all safety rules, precautions and instructions when operating or performing maintenance on the
machine.
q If you are under the influence of alcohol or medication, your ability to safely operate or repair your machine
may be severly impaired putting yourself and everyone else on your jobsite in danger.
q When working with another operator or with a person on worksite traffic duty, be sure that all personnel under-
stand all hand signals that are to be used.
IF ABNORMALITIES ARE FOUND
If you find any abnormality in the machine during operation or maintenance (noise, vibration, smell, incorrect
gauges, smoke, oil leakage, etc., or any abnormal display on the warning devices or monitor), report to the person
in charge and have the necessary action taken. Do not operate the machine until the abnormality has been corrected.
CLOTHING AND PERSONAL PROTECTIVE ITEMS
q Do not wear loose clothing and accessories. There is a hazard that they may catch on control levers or other
protruding parts.
q If you have long hair and it hangs out from your hard hat,
there is a hazard that it may get caught up in the machine,
so tie your hair up and be careful not to let it get caught.
q Always wear a hard hat and safety shoes. If the nature of
the work requires it, wear safety glasses, mask, gloves, ear
plugs, and safety belt when operating or maintaining the
machine.
q Check that all protective equipment functions properly
before using it.
FIRE EXTINGUISHER AND FIRST AID KIT
Always follow the precautions below to prepare for action if any
injury or fire should occur.
q The fire extinguisher can be fastened to the inside cabin
wall on the left.
q If, in the course of certain operations, there is danger of
fire, fire extinguishers must be at hand. Familiarise with the
use of the fire extinguishers.
Fastening points
q Inform yourself on measures to be taken in the event of a
fire.
q The first-aid kit can be positioned on the right of the cabin's
interior.
q Make sure that you know all telephone numbers of the per-
sons that you need to contact in an emergency.
2-7
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