JLG 660SJ Service Manual - Manual (Page 74)

SECTION 3 - CHASSIS & TURNTABLE
3-30 – JLG Lift – 3121298
12. Press rear shaft bearing (22) in endcap. Install bearing
with letters facing out. Press until bearing surface is 0.08
±0.01 in (2 ±0.25 mm) above endcap surface.
Figure 3-38. Valve Plate and Rear Bearing
13. Install timing pin (23) into its bore in the endcap. Install
pin with groove facing toward or away from shaft. Press
pin until end protrudes 0.12 ±0.01 in (3 ±0.25 mm)
above endcap surface.
14. Install valve plate (24) on endcap. Install valve plate with
yellow surface toward cylinder block. Align slot in valve
plate with timing pin. Apply a liberal coat of assembly
grease to endcap side of valve plate to keep it in place
during installation.
15. Install endcap (25) on housing with endcap screws (26).
Ensure endcap will properly seat to housing without
interference. Improper assembly of internal components
may prevent endcap from seating properly. Ensure O-
rings seat properly when installing endcap.
Figure 3-39. End Cap
16. Using an 8 mm internal hex wrench, tighten endcap
screws. Tighten screws in opposite corners slowly and
evenly to compress the servo spring and properly seat
the endcap. Torque endcap screws 35-45 ft-lb (47-61
Nm).
17. Before installing shaft seal, ensure shaft turns smoothly
with less than 120 in-lb (13.5 Nm) of force. If shaft does
not turn smoothly within specified maximum force, dis-
assemble and check unit.
22. Rear Shaft Bearing
23. Timing Pin
24. Valve Plate
23
23
22
24
(3 mm)
0.12 in
0.08 in 23
22
25. End Cap
26. Screw
26
25
8 mm
(47-61 Nm)
35-45 ft-lbs