Komatsu PC210LC-6 User Manual

DISASSEMBLY AND ASSEMBLY
CONTROL VALVE
DISASSEMBLY OF CONTROL
VALVE ASSEMBLY
*
a
1.
2.
3.
4.
The set pressure of the safety valve and arm
counterbalance valve cannot be adjusted when they
are installed on the machine, so do not
disassemble.
The following explanation describes the 6-spool
control valve.
Main relief valve, main unload l LS relief valves
1) Remove main relief valve (1).
2) Remove main unload l LS relief valve (3).
Unload valves, safety-suction valves, suction
valves
1) Remove unload valves (4) and (5).
2) Remove safety-suction valves (6) (7) (8) (9)
(IO), and (11).
3) Remove suction valves (12) (13) (14), and
(15).
Pressure compensation valves
j, Before moving any pressure compensation
valve, check and mark its mounting position.
1) Remove bucket DUMP pressure compensation
valve (16) R.H. travel REVERSE pressure
compensation valve (17) boom RAISE
pressure compensation valve (18), right swing
pressure compensation valve (19), L.H. travel
REVERSE pressure compensation valve (20)
and arm IN pressure compensation valve (21).
* After removing the pressure compensation
valves, remove check valve (22) from each
pressure compensation valve mount.
2) Remove bucket CURL pressure compensation
valve (23) R.H. travel FORWARD pressure
compensation valve (24) boom LOWER
pressure compensation valve (25) left swing
pressure compensation valve (26) L.H. travel
FORWARD pressure compensation valve (27),
and arm OUT pressure compensation valve
(28).
* After removing the pressure compensation
valves, remove check valve (29) from each
pressure compensation valve mount.
LS select valve
Remove LS select valve (30).
5. LS shuttle valves, pump merge-divider valve,
arm counterbalance valve
1) Remove LS shuttle valves (31) and (32).
2) Remove pump merge-divider valve (33), then
remove spring (57) and valve (58).
3) Remove arm counterbalance valve (34) then
remove spring (59) and (60).
6. Remove covers (35) and (36).
7.
Arm control valve, boom control valve, bucket
control valve
1) Remove case (37) then remove spring (38)
and retainer (39).
2) Remove spool assembly (40).
* Do not disassemble spool assembly (40).
3) Remove case (41) then remove spring (42),
shim (43) and retainer (44).
j, Shim (43) is only for the boom control
valve.
8. Swing control valve
1) Remove case (45) then remove spring (46),
shim (47), and retainer (48).
2) Remove spool assembly (49).
* Do not disassemble spool assembly (49).
3) Remove case (41) then remove spring (42)
and retainer (44).
9. R.H. travel control valve, L.H. travel control
valve
1) Remove case (50) then remove spring (51)
and retainer (52).
2) Remove spool assembly (53).
* Do not disassemble spool assembly (53).
3) Remove case (54) spring (55) and retainer
(56).
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Komatsu PC210LC-6 Specifications

General

Brand	Komatsu
Model	PC210LC-6
Category	Excavators
Language	English