JLG 600SC_660SJC Service Manual - Manual (Page 63)

SECTION 3 - CHASSIS & TURNTABLE
3121607 – JLG Lift – 3-27
Motor Control Valve Disassembly
1. Place unit on bench with motor end up.
2. Remove Drain P l ug (1P) and dra i n oil from gearbox.
3. Remove Hydrau l ic Tubing Assembly (35) .
4. Loosen jam nuts on Elbow Fittings (30). Remove fitt i ngs
from Brake (6) and Motor Control Valve (32).
5. Remove O-ring Plugs (23) from Motor Control Valve (32).
6. Remove four bolts (21), washers (22), and Motor Control
Valve (32) from Motor (31).
7. Reinstall Drain Plug (1P). Torque to 23 - 24 ft-lb (31 - 32.5
Nm).
Figure 3-21. Main Control Valve Disassembly
Motor and Brake Disassembly
1. With unit resting on bench with Motor (31) end up,
remove Hex Bolts (29) and Lift Lugs (28) from Motor (31).
2. Pull Motor (31) straight up and remove Motor (31) from
Brake Housing (6).
3. Remove O-ring (26) between Motor (31) and Brake
Housing (6).
4. Remove Springs (8L) from piston.
PISTON (8A) MAY MOVE QUICKLY. WEAR EYE PROTECTION.
5. Apply less than 50 psi air to brake port to remove Brake
Piston (8A).
6. Remove Rotors (8J) and Stators (8K) from Brake Housing
(6)
.
Figure 3-22. Motor and Brake Disassembly
31
1P
35
32
23
22
21
6
6
8K
8J
8L
8K
8K
8K
8J
8K
8J
8J
8A
26
31
28
29