00-1
•
This shop manual may contain attachments and optional equipment that are not avail-
able in your area. Please consult your local Komatsu distributor for those items you may
require. Materials and specifications are subject to change without notice.
• WA50-3 mount the S3D84E-3B and S3D84E-5X engine.
For details of the engine, see the 68E-88E Series Engine Shop Manual.
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© 2004 1
All Rights Reserved
Printed in Japan 03-04(03)00001
1
MACHINE MODEL
SERIAL NUMBER
WA50-3
21450 and up
SEBM017803
(3)
00-2
WA50-3
CONTENTS
01 GENERAL ......................................................................... 01-1
10 STRUCTURE AND FUNCTION ....................................... 10-1
20 TESTING AND ADJUSTING........................................... 20-1
30 DISASSEMBLY AND ASSEMBLY .................................. 30-1
40 MAINTENANCE STANDARD.......................................... 40-1
90 OTHERS............................................................................ 90-1
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SAFETY
SAFETY NOTICE
00-3
SAFETY
SAFETY NOTICE
IMPORTANT SAFETY NOTICE
Proper service and repair is extremely important for safe machine operation. The service and
repair techniques recommended by Komatsu and described in this manual are both effective
and safe. Some of these techniques require the use of tools specially designed by Komatsu for
the specific purpose.
To prevent injury to workers, the symbol k is used to mark safety precautions in this manual.
The cautions accompanying these symbols should always be followed carefully. If any danger-
ous situation arises or may possibly arise, first consider safety, and take the necessary actions
to deal with the situation.
GENERAL PRECAUTIONS
Mistakes in operation are extremely dangerous.
Read the Operation and Maintenance Manual care-
fully BEFORE operating the machine.
1. Before carrying out any greasing or repairs, read
all the precautions given on the decals which are
fixed to the machine.
2. When carrying out any operation, always
wear safety shoes and helmet. Do not w