Komatsu WB156-5 Manual

CEAM016705
Operation&Maintenance
Manual
WB156 -5
WB156PS -5
BACKHOE LOADER
SERIAL NUMBERS WB156-5 A63001 and up
WB156PS-5 A73001and up
ENGINE 4D102LE-2
This material is proprietary to Komatsu America Corp. and is not to be reproduced, used, or disclosed except in
accordance with written authorization from Komatsu America Corp.
It is our policy to improve our products whenever it is possible and practical to do so. We reserve the right to make
changes or improvements at any time without incurring any obligation to install such changes on products sold
previously.
Due to this continuous program of research and development, revisions may be made to this publication. It is
recommended that customers contact their distributor for information on the latest revision.
Copyright 2016 Komatsu
Printed in U.S.A.
Komatsu America Corp.
April 2016

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0-1
INTRODUCTION 0
WB156/156PS-5
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INTRODUCTION
0-2 WB156/156PS-5
FOREWORD
This manual describes procedures for operation, handling, lubrication, maintenance, checking, and adjustment. It will help the
operator and maintenance personnel achieve peak performance through effective, economical, and safe machine operation and
maintenance.
Komatsu cannot predict every circumstance that might involve a potential hazard when the machine is used. The safety mes-
sages in this manual and on the machine may not include all possible safety precautions. If you carry out any operation,
inspection, or maintenance under conditions that are not described in this manual, understand that it is your responsibility to
take the necessary precautions to ensure safety. In no event should you or others engage in the prohibited uses or actions
described in this manual. Improper operation and maintenance of the machine can be hazardous and could result in serious
injury or death.
Store this manual in the pocket at the rear of the operator’s seat and have all personnel read it periodically. If this manual is
lost, damaged or becomes dirty and cannot be read, request a replacement manual from your local distributor.
If you sell the machine, give this manual to the new owner.
Continuing improvements in the design of this machine can lead to changes which may not be reflected in this manual. The
explanation, values and illustrations in this manual have been prepared based on the latest information available at the date of
its publication. Consult your local KOMATSU distributor for the latest available information on 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 your local
KOMATSU distributor for those items that you may require.
The numbers in illustrations correspond to the numbers in (_) in the text, i.e., (1) ➞➀.
Improper operation and maintenance of this machine can be hazardous and could result in serious injury or death.
• Operators and maintenance personnel must read this manual thoroughly before operating or maintaining this
machine.
• This manual should be kept near or with the machine for reference and periodically reviewed by all personnel who
operate it.
• Some actions involved in operation and maintenance can cause a serious accident if they are not performed in
the manner described in this manual.
• The procedures and precautions given in this manual apply only to the intended uses of this machine. If you use
your machine for any unintended uses that are not specifically prohibited, you must be sure that it is safe for you
and others. In no event should you or others engage in prohibited uses or actions described in this manual.
• 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 features 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 your local distributor or KOMATSU before operating the machine.
• The safety description is given in “SAFETY INFORMATION” on page 0-3 and in the SAFETY section 1.
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INTRODUCTION
WB156/156PS-5 0-3
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 perform-
ing maintenance and machine operations. Failure to do so may result in serious injury or death.
The following signal words are used to inform you that there is a potentially hazardous situation that may lead to personal
injury or damage. In this manual and on machine labels, different signal words are used to express the potential level of haz-
ard.
The Safety Alert Symbol identifies important safety messages on machines, in manuals, and elsewhere. When you see this
symbol, be alert to the risk of personal injury or death. Follow the instructions in the safety message.
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury. This signal word is to be limited to most extreme situations.
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. It may also be used to alert against unsafe practices.
Remark
This word is used for precautions that must be taken to avoid actions which could shorten the life of the
machine. It is also used to indicate information that is useful to know.
Safety precautions are described in SAFETY section 1.
KOMATSU AMERICA CORP. cannot predict every circumstance that might involve a potential hazard in operation and
maintenance. Therefore the safety message 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 local distributor or KOMATSU AMERICA CORP.
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INTRODUCTION
0-4 WB156/156PS-5
SAFETY LABELS
Safety labels are affixed to the machine to inform the operator or maintenance worker of possible hazards when operating or
maintaining the machine.
This machine uses "safety labels using words" and "safety labels using pictograms" to indicate safety procedures.
Example of safety label using words
Example of safety label using pictogram
Safety pictograms use a picture to express a level of hazardous condi-
tion equivalent to the signal word. These safety pictograms use pictures
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 hazard is displayed inside a triangle and the method of avoiding the
hazardous condition is shown inside a circle.
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INTRODUCTION
WB156/156PS-5 0-5
APPROVED AND NON-APPROVED USES
The Komatsu BACKHOE LOADERS described in this manual have been designed and constructed to be used mainly for the
following functions. Any non-approved functions may void the warranty, damage the machine, or possibly injure the operator.
Approved Functions
•Loading, scraping, or grading operations
•Excavating
Installation of optional equipment can also be used in the following applications. Use only Komatsu-compatible equipment.
•Handling materials (4-in-1 bucket - pallet forks)
•Snow plowing (angle dozer blade - snowplow)
•Demolition (hand hammer - hammer on backhoe unit)
•Ditch cleaning and digging (special buckets)
Non-approved Functions
This paragraph describes some of the improper or unauthorized uses of the machine. It is impossible to predict all the possible
improper uses. If the machine is to be used for any particular application other than those listed in the Approved Function list,
it is important to contact your authorized Komatsu distributor before carrying out the work operations.
•Use of machine for lifting or transporting personnel in any manner
•Transportation of flammable liquids
•Lifting, moving, or transporting other machines with the front end loader or backhoe unit
•Towing other equipment with the tractor unit or work equipment
•Using the backhoe unit to move or reposition the machine
•Using the backhoe or loader as a hammer or for striking or driving objects
•Towing the machine at high speeds
•Traveling at high speeds
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INTRODUCTION
0-6 WB156/156PS-5
PRODUCT INFORMATION
Komatsu backhoe loader and main components are identified by serial numbers stamped on identification plates or decals
attached to the machine or component.
Main Features
•Simple and easy operation
•Power-assisted steering with priority hydraulic system
•Loader control through a single lever ensures combined movements that can be modulated proportionally and continually
•PPC backhoe control with two levers ensure combined movements that can be modulated proportionally and continually
•Complete series of instruments visible from the two operating positions (loader or backhoe)
•Separate engine throttle controls for the two operating positions
•Foot brake control
•Easy maintenance with simplified intervals
Breaking-in the New Machine
Every new machine is properly adjusted and tested before delivery. A new machine must be operated carefully for the first
100 hours in order to ensure proper running-in time for the various components. If the machine is subjected to excessive or
severe work loads at the beginning of operation, functions will be greatly reduced or damaged. Every new machine must be
used carefully, paying special attention to the following indications:
•After start-up, let the engine idle at a low rpm for five minutes to warm up the machine gradually before beginning actual
operation.
•Operate the machine with limited loads.
•Avoid abrupt starts, accelerations, sudden decelerations, abrupt reversals, or sudden stops.
•After the first 250 hours, carry out the following maintenance in addition to normal maintenance performed at 250 hours:
A. Change the hydraulic transmission oil and filter.
B. Change the differential unit oil (front and rear axle).
C. Change the oil in the final reduction gears (front and rear axle).
D. Check and adjust the engine valve clearance.
E. Change the hydraulic system oil filter.
Synthetic Biodegradable Oil Types
On machines in which synthetic biodegradable oils are used, the following operations are to be performed in addition to the
standard maintenance operations:
•After the first 50 hours of operation, change the hydraulic system filter.
•After the first 500 hours of operation, change the hydraulic system oil and filter.
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