Flow Amplifier Rebuild - Komatsu 930E-2 Shop Manual

FLOW AMPLIFIER
Removal
Relieve pressure before disconnecting hydraulic
and other lines. Tighten all connections before
applying pressure.
Hydraulic fluid escaping under pressure can have
sufficient force to enter a person's body by pene-
trating the skin and cause serious injury and pos-
sibly death if proper medical treatment by a
physician familiar with this injury is not received
immediately.
1. Perform normal truck shutdown procedures. Turn
key switch "Off" and allow 90 seconds for the
accumulators to bleed down. Disconnect, plug,
identify, and tag each hydraulic line.
2. Support the flow amplifier valve and remove the
mounting capscrews. Remove valve.
3. Move valve to a clean work area for disassembly.
Installation
1. Support the flow amplifier and move into position.
2. Install mounting capscrews and tighten to stand-
ard torque.
3. Identify hydraulic line location, unplug lines and
connect at proper location. Tighten fittings se-
curely. Use new O-rings on the flange fittings.

FLOW AMPLIFIER REBUILD

The flow amplifier valve is a precision unit manufac-
tured to close tolerances, therefore complete cleanli-
ness is a must when handling the valve. Work in a
clean area and use lint free wiping materials or dry
compressed air. Use a wire brush to remove foreign
material and debris from around the exterior of the
valve before disassembly. Clean solvent and type C-4
hydraulic oil should be used to insure cleanliness and
initial lubrication.
L6-6
FIGURE 6-7. FLOW AMPLIFIER VALVE
1. Capscrew
2. Lockwasher
3. Capscrews
4. Lockwasher
5. Cover
6. O-ring
7. O-ring
8. O-ring
9. (Not Used)
10. O-ring
11. O-ring
12. Shock/Suction Valve (Complete)
13. Orifice Screw
14. Valve Housing
15. Counterpressure Valve (Complete)
16. O-ring
17. Plug
18. Plug
19. Seal
20. Stop
21. Spring
22. Spring
23. Spring Control
24. Orifice Screw
25. O-ring
26. Shock/Suction Valve (Complete)
27. Main Spool
28. O-ring
29. Spring Control
30. Spring
31. Spring
32. Spring Stop
33. Orifice Screw
34. Capscrews
35. Capscrew
36. Lockwasher
37. Lockwasher
38. O-rings
39. Cover
40. O-rings
41. (Not Used)
42. Stop
43. Spring
44. Spool
45. Orifice Screw
46. Name Plate
47. Check Valve
48. Orifice Plug
49. Spring
50. Pins
51. O-ring
52. Spring
53. Amplifier Spool Assembly (Complete)
54. Relief Valve Assembly
55. Seal
Steering Circuit Component Repair L06021