Komatsu WA900-3, WA900-3E0 Wheel Loader Service Manual

Table of Contents

• Index and foreword
• Specification
• Structure, functions and maintenance standard
• Standard value table
• Testing and adjusting
• Troubleshooting
• Disassembly and assembly
• Diagrams and drawings

Disassembly and assembly of accumulator charge valve
Disassembly

1. Remove PPC relief valve (2) from valve body (1).
2. Remove O-rings (3), (5) and 2 backup rings (4) from the PPC relief valve.
3. Remove plug (6) from valve body (1), then remove spring (7) and spool (8).
4. Remove the O-ring (9) from plug (6).
5. Remove bushing (10) from valve body (1).
6. Remove snap ring (11), filter (12) and O-ring (13) from bushing (10).
7. Remove locknut (14) from valve body (1), then remove adjustment screw (15).
8. Remove retainer (16), spring (17), shim (18) and O-ring (19) from adjustment screw (15).
9. Remove plug (20) from valve body (1), then remove retainer (21), piston (22) and valve seat (23).
10. Remove O-ring (24) from plug (20).
11. Remove locknut (14) from valve body (1), then remove adjustment screw (15).
12. Remove ball (25), spring (26), shim (18) and O-ring (19) from adjustment screw (15).
13. Remove plug (27) from valve body (1), then remove orifice (28).
14. Remove snap ring (29) from valve body (1), then remove filter (30).