JLG 660AJ Service Manual - Manual (Page 64)

SECTION 3 - CHASSIS & TURNTABLE
3-20 – JLG Lift – 3121616
13. Using an 8 mm internal hex wrench, remove endcap
screws (22).
14. Remove endcap (23). Remove O-ring (24) from housing
or endcap. When endcap screws are removed, pressure
from servo spring will cause endcap to bind on shaft.
Press down on portion of endcap covering servo piston
and hold endcap level while removing.
DO NOT SCRATCH VALVE PLATE SURFACE.
15. Remove valve plate (25) and timing pin (26) from end-
cap. Each displacement has a unique valve plate. For
identification, the last two digits of the valve plate part
number are stamped on its surface.
16. Remove and discard O-rings (27, 28).
17. Remove rear shaft bearing (29) from endcap with a bear-
ing puller. Bearing may be difficult to remove with a
puller. Try this as an alternative: Pack bearing cavity with
heavy grease. After shaft is removed, insert it into bear-
ing cavity and tap lightly with a soft mallet on the
splined end. The grease will force the bearing out. Use
caution not to drive bearing past the rear shaft journal as
bearing may become trapped on shaft and damaged.
18. Remove minimum angle stop (29) and servo spring (30)
from housing.
24
22
23
22. Screw
23. End Cap
24. O-ring
Figure 3-21. End Cap
26
28
29
30
29
27
25
25. Valve Plate
26. End Cap
27. O-ring
28. O-ring
29. Angle Stop
30. Servo Spring
Figure 3-22. Valve Plate & Rear Shaft Bearing