DISASSEMBLY AND ASSEMBLY
CONTROL VALVE
ASSEMBLY OF CONTROL VALVE
ASSEMBLY
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Before assembling, coat the sliding surface with
engine oil.
1.
R.H. travel control valve, L.H. travel control
valve
1)
2)
3)
Assemble spool assembly (53) to valve body.
Assemble retainer (56) and spring (55) to
spool, then fit O-ring to case (54) and install.
Case mounting bolt: 30.9 f 3.4 Nm
(2.9 f 0.5 kgm)
Assemble retainer (52) and spring (51) to
spool, then fit O-ring to case (50) and install.
Case mounting bolt: 30.9 f 3.4 Nm
(2.9 + 0.5 kgm)
2. Swing control valve
1)
2)
3)
Assemble spool assembly (49) to valve body.
Assemble retainer (44) and spring (42) to
spool, then fit O-ring to case (41) and install.
Case mounting bolt: 30.9 + 3.4 Nm
(2.9 f 0.5 kgm)
Assemble retainer (48), shim (47) and spring
(46) to spool, then fit O-ring to case (45) and
install.
Case mounting bolt: 30.9 + 3.4 Nm
(2.9 f 0.5 kgm)
3.
Arm control valve, boom control valve, bucket
control valve
1) Assemble spool assembly (40) to valve body.
2) Assemble retainer (44), shim (43) and spring
(42) to spool, then fit O-ring to case (41) and
install.
Case mounting bolt: 30.9 f 3.4 Nm
(2.9 f 0.5 kgm)
* Shim (43) is only for the boom control
valve.
3) Assemble retainer (39) and spring (38) to
spool, then fit O-ring to case (37) and install.
Case mounting bolt: 30.9 + 3.4 Nm
(2.9 + 0.5 kgm)
4. Covers
1) Fit O-ring to cover (36) and install.
2) Fit O-ring to cover (35) and install.
Mounting bolt: 166.7 + 9.8 Nm (17 f
1 kgm)
* Tighten the mounting bolts in the order
shown in the diagram.
5. LS shuttle valve, pump merge-divider valve, arm
counterbalance valve
1)
Assemble valve (60) and spring (59) to valve
body, and install arm counterbalance valve
(34).
Mounting bolt: 66.2 f 7.4 Nm (6.8 +
0.8 kgm)
* Tighten the mounting bolts in the order
shown in the diagram.
2) Assemble valve (58) and spring (57) to valve
body, and install pump merge-divider valve
(33).
Mounting bolts: 166.3 f 9.4 Nm (17
+ 1 kgm)
* Tighten the mounting bolts in the order
shown in the diagram.
3) Install LS shuttle valves (32) and (31).
Mounting bolt: 66.2 + 7.4 Nm (6.8 +
0.8 kgm)
6.
LS select valve
Install LS select valve (30).
LS select valve: 127.5 f 19.6 Nm (13 f
2 kgm)
7.
Pressure compensation valves
l Check marks made on each pressure
compensation valve when disassembling and
install in correct position.
1) Before installing pressure compensation valves
below, install check valves (29) and (22).
2) Fit O-rings, then install arm IN pressure
compensation valve (28) L.H. travel
FORWARD pressure compensation valve (27),
left swing pressure compensation valve (26)
boom LOWER pressure compensation valve
(25), R.H. travel FORWARD pressure
compensation valve (24) and bucket CURL
pressure compensation valve (23).
3) Fit O-rings, then install arm OUT pressure
compensation valve (21) L.H. travel REVERSE
pressure compensation valve (20) right swing
pressure compensation valve (19) boom
RAISE pressure compensation valve (18), R.H.
travel REVERSE pressure compensation valve
(17) and bucket DUMP pressure compensation
valve (16).
Pressure compensation
valve:
225.5 f 19.6 Nm (23 + 2 kgm)
8. Unload valves, safety-suction valves, suction
valves
1) Fit O-rings and install suction valves (15) (14)
(13) and (12).
Suction valve: 147.1 + 9.8 Nm (15 f
1 kgm)
2) Fit O-ring and install safety-suction valves (1 I),
(IO), (9) (8) (7) and (6).
Safety-suction valve: 147.1 ?I 9.8
Nm (15 f 1 kgm)
3) Fit O-ring and install unload valves (5) and (4).
Unload valve: 98.1 f 9.8 Nm (10 f
1 kam)
9. Main relief valve, main unload l LS relief valve
1) Fit O-ring and install main unload l LS relief
valve (3).
w
Main unload l LS relief valve: 85.9
f 7.4 Nm (8.8 + 0.8 kgm)
2) Fit O-ring and install main relief valve (1).
Q=
Main relief valve: 53.9 f 4.9 Nm
(5.5 f 0.5 kgm)
30-118
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