Komatsu WB146PS-5 Backhoe Loader Service Manual

Table of Contents

01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 STRUCTURE, FUNCTION AND MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . 10-1
20 TESTING, ADJUSTING AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1
30 DISASSEMBLY AND ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-1
90 OTHER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1

GENERAL
This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and
lubricant specification charts.

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
This section explains the structure and function of each component. It serves not only to give an understanding of the
structure, but also serves as reference material for troubleshooting. In addition, this section gives the judgement standards
when inspecting disassembled parts.

STANDARD VALUE TABLE
This section explains the standard values for new machine and judgement criteria for testing, adjusting and
troubleshooting. This standard value table is used to check the standard values in testing and adjusting and to judge parts
in troubleshooting.

TESTING AND ADJUSTING
This section explains checks to be made before and after performing repairs, as well as adjustments to be made at
completion of the checks and repairs.

TROUBLESHOOTING
Troubleshooting charts correlating Problems to Causes are also included in this section.

DISASSEMBLY AND ASSEMBLY FOR KOMATSU WB146PS-5
This section explains the order to be followed when removing, installing, disassembling or assembling each component,
as well as precautions to be taken for these operations.

DIAGRAMS AND SCHEMATICS
This section has the foldout drawings for the machine.

BACKHOE SWING FRAME WB146PS-5

Do this procedure on a flat, level and smooth surface.

REMOVAL
1. Remove the working equipment.
2. Remove bolts (1) and remove pins (2) that connect the swing cylinders (3).
3. Remove boom safety cylinder (4). For details, see BOOM LOCK CYLINDER on page 30-329.

4. Remove snap ring (7), washer (8) and nut (4).
5. Slide bolt (5) out of linkage (6) and lock lever (9).
6. Remove lock lever (9) from boss pin (10).
7. Remove the swing bracket (8) and the relative shim (13) adjustments to given clearance.