Komatsu Avance Loader WA900-3 Manual

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1. FOREWORD
This manual provides rules and guidelines which will help you use this machine safely and
effectively. Keep this manual handy and have all personnel read it periodically. If this manual has been
lost or has become dirty and can not be read, request a replacement manual from Komatsu or your
Komatsu distributor.
If you sell the machine, be sure to give this manual to the new owners.
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.
This manual may contain attachments and optional equipment that are not available in your area.
Consult Komatsu or your Komatsu distributor for those items you may require.
 WARNING
‡ Improper operation and maintenance of this machine can be hazardo s and co ld res lt in serio s
inj ry or death.
‡ Operators and maintenance personnel sho ld read this man al thoro ghly before beginning
operation or maintenance.
‡ Some actions involved in operation and maintenance of the machine can ca se a serio s accident,
if they are not done in a manner described in this man al.
‡ The proced res and preca tions given in this man al apply only to intended ses of the machine.
If yo se yo r machine for any nintended ses that are not specifically prohibited, yo m st
be s re that it is safe for yo and others. In no event sho ld yo or others engage in prohibited
ses or actions as described in this man al.
‡ Komats delivers machines that comply with all applicable reg lations and standards of the
co ntry to which it has been shipped. If this machine has been p rchased in another co ntry or
p rchased from someone in another co ntry, it may lack certain safety devices and specifications
that are necessary for se in yo r co ntry. If there is any q estion abo t whether yo r prod ct
complies with the applicable standards and reg lations of yo r co ntry, cons lt Komats or yo r
Komats distrib tor before operating the machine.
‡ The description of safety is given in SAFETY INFORMATION on page 0-4 and in SAFETY from page
1-1.
CALIFORNIA
Proposition 65 Warning
Diesel engine exha st and some of its
constit ents are known to the State
of California to ca se cancer, birth
defects, and other reprod ctive
harm.

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1. F REW RD

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1. F REW RD

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2. SAFETY INFORMATION
Most accidents are caused by the failure to follow fundamental safety rules for the operation and
maintenance of machines. To avoid accidents, read, understand and follow all precautions and warnings
in this manual and on the machine before performing operation and maintenance.
To identify safety messages in this manual and on machine labels, the following signal words are
used.
DANGER – This word is sed on safety messages and safety labels where there is a high
probability of serio s inj ry or death if the hazard is not avoided. These safety
messages or labels s ally describe preca tions that m st be taken to avoid the
hazard. Fail re to avoid this hazard may also res lt in serio s damage to the
machine.
WARNING – This word is sed on safety messages and safety labels where there is a
potentially dangero s sit ation which co ld res lt in serio s inj ry or death if
the hazard is not avoided. These safety messages or labels s ally describe
preca tions that m st be taken to avoid the hazard. Fail re to avoid this hazard
may also res lt in serio s damage to the machine.
CAUTION – This word is sed on safety messages and safety labels for hazards which co ld
res lt in minor or moderate inj ry if the hazard is not avoided. This word might
also be word for hazards where the only res lt co ld be damage to the machine.
NOTICE – This word is sed for preca tions that m st be taken to avoid actions which
co ld shorten the life of the machine.
Safety precautions are described in SAFETY from page 1-1.
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, you must be sure that you and others can do such procedures and actions safely and
without damaging the machine. If you are unsure about the safety of some procedures, contact your
Komatsu distributor.

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3. INTRODUCTION
3.1 INTENDED USE
This machine is intended mainly for the following operations.
‡ Digging operations
‡ Leveling operations
‡ Pushing operations
‡ Loading operations
For details of the operating procedure, see “12.10 W RK P SSIBLE USING WHEEL L ADER”.
3.2 FEATURES
1. Easy to operate work equipment
‡ By using the kick-down switch installed to the knob on the boom control lever, it is possible to
shift down from 2nd to 1st, thereby providing speedy digging and loading operations.
‡ The powerful digging force and drawbar pull make it easy to dig and scoop up loads.
‡ The large dumping clearance and reach make it easy to load dump trucks.
‡ The excellent acceleration and production per unit of fuel make this a very economical machine.
‡ Installation of bucket corner teeth and wear plates between the teeth give the bucket a large
resistance to wear.
2. Easy to operate machine
‡ The electrical transmission control provides light gear shifting, enabling finger control.
‡ The length of both the directional and speed levers can be adjusted individually.
‡ The PPC valve (proportional pressure type) provides good response when raising the boom and
little operating force is required.
‡ A wrist rest is provided by the control levers to improve the ease of control.
3. perating comfort
‡ The sealed pressurized cab with air conditioner make pleasant operations possible.
‡ A fabric seat is used for the operator’s seat to give the operator a good ride.
‡ A low-vibration cab and viscous mount are employed.
4. High levels of safety
‡ Safety is ensured by the good visibility from the cab, the wide area around the operator’s seat,
steps for getting on and off the machine, and the walk-through floor at the rear of the cab.
‡ The rear access step offers increased safety when the operator gets on and off the machine with
something in his hands.
‡ With the handrail and nonskid treatment on the top of the hood, the operator can check the
radiator water level and add water to it more safely.
‡ Checks before starting and checks for abnormalities during operation can be carried out using
the machine monitor.
‡ Maintenance free wet-type multiple disc brakes are used.
3.3 BREAKING IN THE MACHINE
Your Komatsu machine has been thoroughly adjusted and tested before shipment.
However, operating the machine under severe conditions at the beginning can adversely affect the
performance and shorten the machine life.
Be sure to break in the machine for the initial 100 hours (as indicated by the service meter.)
During breaking in:
‡ Idle the engine for 5 minutes after starting it up.
‡ Avoid operation with heavy loads or at high speeds.
‡ Avoid sudden starts, sudden acceleration, sudden steering and sudden stops except in cases of
emergency.
The precautions given in this manual for operating, maintenance, and safety procedures are only
those that apply when this product is used for the specified purpose. If the machine is used for a purpose
that is not listed in this manual, Komatsu cannot bear any responsibility for safety. All consideration of
safety in such operations is the responsibility of the user.
perations that are prohibited in this manual must never be carried out under any circumstances.

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3. INTR DUCTI N
3.4 VISIBILITY FROM OPERATOR’S SEAT
The visibility standards (IS 5006) for this machine require a view shown in the diagram below.
3.4.1 VISIBILITY IN IMMEDIATE AREA
The visibility of this machine in the area 1 m from the outside surface of the machine at a height
of 1.5 m is shown in the diagram below. The hatched area A shows the area where the view is blocked
by part of the machine when mirrors or other aids to visibility are installed as standard. Please be fully
aware that there are places that cannot be seen when operating the machine.
3.4.2 12-M RADIUS VISIBILITY
The visibility at a radius of 12 m from the machine is as shown in the diagram below. The hatched
areas B show the areas where the view is blocked when mirrors or other aids to visibility are installed
as standard. Please be fully aware that there are places that cannot be seen when operating the machine.

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4. LOCATION OF PLATES, TABLE TO ENTER
SERIAL NO. AND DISTRIBUTOR
4.1 PRODUCT IDENTIFICATION NUMBER (PIN)/MACHINE SERIAL NO. PLATE
n the center right of the front frame.
The design of the nameplate differs according to the territory.
4.2 ENGINE SERIAL NO. PLATE POSITION
n the right of the cylinder block, when seen from the fan side.

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4. L CATI N F PLATES, TABLE T ENTER SERIAL N . AND DISTRIBUT R
4.3 TABLE TO ENTER SERIAL NO. AND DISTRIBUTOR
REMARKS
Machine serial No.:
Engine serial No.:
Product identification number (PIN):
Distributor name:
Address: Phone:
Service personnel for your machine:

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5. CONTENTS
1. Foreword ............................................................................................................................................ 0- 1
2. Safety information ............................................................................................................................ 0- 4
. Introduction ........................................................................................................................................ 0- 5
4. Location of plates, table to enter serial No. and distributor ...................................................... 0- 7
SAFETY
6. General precautions .......................................................................................................................... 1- 2
7. Precautions during operation .......................................................................................................... 1- 8
7.1 Before starting engine ............................................................................................................ 1- 8
7.2 After starting engine ............................................................................................................... 1-11
7.3 Transportation .......................................................................................................................... 1-19
7.4 Battery ....................................................................................................................................... 1-20
7.5 Towing ...................................................................................................................................... 1-22
8. Precautions for maintenance ........................................................................................................... 1-23
8.1 Before carrying out aintenance .......................................................................................... 1-23
8.2 During aintenance ................................................................................................................ 1-28
8.3 Tires .......................................................................................................................................... 1-34
9. Position for attaching safety labels ................................................................................................ 1-36
OPERATION
10. General view ...................................................................................................................................... 2- 2
10.1 General view of achine ....................................................................................................... 2- 2
10.2 General view of controls and gauges .................................................................................. 2- 3
11. Explanation of components ............................................................................................................. 2- 4
11.1 Machine onitor ..................................................................................................................... 2- 4
11.2 Switches ................................................................................................................................... 2-14
11.3 Control levers, pedals ............................................................................................................. 2-22
11.4 Steering colu n tilt lever ....................................................................................................... 2-26
11.5 Cap with lock ........................................................................................................................... 2-26
11.6 Safety bar ................................................................................................................................. 2-27
11.7 Towing pin ............................................................................................................................... 2-27
11.8 Grease pu p ........................................................................................................................... 2-28
11.9 Backup alar ........................................................................................................................... 2-28
11.10 Door-open lock ........................................................................................................................ 2-28
11.11 Tool box ................................................................................................................................... 2-28
11.12 Fuel stop lever ......................................................................................................................... 2-28
11.13 Fuse ........................................................................................................................................... 2-29
11.14 Slow-blow fuse ........................................................................................................................ 2-30
11.15 Lunch box tray ......................................................................................................................... 2-31
11.16 Storaging place of this anual ............................................................................................. 2-31
11.17 Taking off power ..................................................................................................................... 2-31
11.18 Precautions when handling accu ulator ............................................................................. 2-32