Komatsu 830E Shop Manual page 452

Disassembly
NOTE: The flow amplifier valve is a precision unit
manufactured to close
complete cleanliness is a must when handling the
flow amplifier 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.
1. Remove counter pressure valve plug (17, Fig-
ure 5-7), and O-ring (16). Remove counter
pressure valve assembly (15).
NOTE: As parts are removed, they should be laid out
in a group in the same order in which they are
removed.
2. Remove relief valve plug (18) and seal (19).
Using an 8 mm hex head allen wrench, remove
the relief valve assembly (20). Remove steel
seal (21).
3. Remove capscrew (37) and capscrews (36)
using a 10 mm and 13 mm hex head allen
wrench. Remove lockwashers (38 & 39).
Remove end cover (47).
4. remove spring stop (41) and spring (42).
Remove spring stop (34) and springs (32 & 33).
Remove O-rings (40 & 49).
5. Remove spring control (31) and main spool (29).
Remove priority valve spool (43). Remove
spring control (25), springs (23 & 24) and spring
stop (22).
6. Remove amplifier valve spool assembly (51).
Set amplifier valve spool assembly aside for fur-
ther disassembly, if required.
7. Remove shock and suction valve (28). Set
shock and suction valve aside for further disas-
sembly, if required.
8. Remove capscrews (1 & 3) using a 10 mm and
13 mm hex head allen wrench. Remove lock-
washers (2 & 4). Remove end cover (5).
9. Remove O-rings (6, 7 & 8) and spring (55).
10. Remove shock and suction valve assembly (12).
Set the shock and suction valve aside for fur-
ther disassembly, if required. Remove orifice
screw (13).
11. Remove orifice screw (53). Remove check valve
(54).
L5-8
tolerances, therefore
Steering Component Repair
FIGURE 5-7. 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. Relief Valve (Complete)
21. Steel Seal
22. Stop
23. Spring
24. Spring
25. Spring Control
26. Orifice Screw
27. O-Ring
28. Shock/Suction Valve (Complete)
29. Main Spool
30. O-Ring
31. Spring Control
32. Spring
33. Spring
34. Spring Stop
35. Orifice Screw
36. Capscrews
37. Capscrew
38. Lockwasher
39. Lockwasher
40. O-Rings
41. Stop
42. Spring
43. Spool
44. Name Plate
45. Orifice Screw
46. Spring
47. Cover
48. Pins
49. O-Rings
50. Not Used
51. Amplifier Spool Assembly (Complete)
52. O-Ring
53. Orifice Screw
54. Check Valve
55. Spring
L05026