Komatsu WA380-1 Wheel Loader Service Manual

Table of Contents

• Engine
• Power Train
• Steering System
• Brake and Air System
• Work Equipment System
• Electric and Electronic System
• Others

Manual Extract DISASSEMBLY OF STEERING VALVE:

DISASSEMBLY OF STEERING VALVE
1. Remove tubes (1) and (2).
2. Remove main relief valve assembly (3) and safety valve assembly (4).
3. Case assembly
1) Remove case assembly (5), then remove collar (6).
2) Remove covers (26) and (27).
3) Remove dust seal (28).
4) Loosen bolt (30) of lever (29), then remove shaft (31 ).
5) Remove oil seal (32) and bearings (33) and (34).
4. Spool assembly
1) Remove case (7), then remove spool assembly (8).
2) Remove bolt (9), then remove retainer ( 1 O), spring ( 11) and retainer ( 1 0) from spool ( 1 2). * When loosening the bolt, loosen with the spool assembled in the body.
5. Remove plate (13), then remove valve (14).
6. Remove plate (13), then remove seat (15), spring (16) and valve (17).
7. Remove valve (18), then remove boss (19), spring (20), washer (21) and spool (22).
8. Remove plate (13). then remove seat (23), spring (24) and poppet (25).