Brake Valve/Retard Pedal Assembly; Disassembly - Komatsu 930E-2 Shop Manual

Disassembly

NOTE: If not already removed, remove electronic re-
tard pedal (16, Figure 3-2) from brake pedal by remov-
ing pivot shaft (8).
NOTE: During disassembly, precision machined parts
should be ink marked or tagged to ensure proper
reassembly and minimize adjustment time. All items
must be placed back into the bores from which they
were removed.
FIGURE 3-2. BRAKE VALVE/RETARD PEDAL
ASSEMBLY
1. Brake Valve
2. Retainer Clip
3. Pivot Shaft
4. Bushings
5. Shims
6. Retainer Clip
7. Nylon Bearing
8. Pivot Shaft
9. Place 0.025 in. Shim Here
10. Jam Nut
11. Capscrew
12. Pedal Structure
J03019 1/99
13. Pad
14. Nut
15. Capscrew
16. Electronic Retard Pedal Assembly
17. Brake Pedal Actuator
18. Spring Pivot (Lower)
19. Spring
20. Spring Pivot (Top)
21. Set Screw
22. Jam Nut
23. Differential Pressure Switch
Brake Circuit Component Service
1. Match mark each section of the brake valve prior
to disassembly.
2. Drain all oil from all ports of the valve by rotating
the valve over a suitable container.
3. Secure brake valve in an upright position in a vice.
4. Remove the brake pedal actuator (17, Figure 3-2)
by removing the retaining clips (2), then remove
the pivot shaft (3) with a punch and hammer.
5. Remove the four button head allen screws (3,
Figure 3-3) securing the boot retainer plate (4).
6. Remove the boot retainer plate (4), boot (2), and
actuator cap (1) as an assembly by grasping the
boot and gently lifting from the valve body.
J3-3