JLG 450A_AJ Series II Service Manual - Manual (Page 64)

SECTION 3 - CHASSIS & TURNTABLE
3-24 – JLG Lift – 3121290
13. Using an 8 mm internal hex wrench, remove endcap
screws (22).
14. Remove endcap (23). Remove O-ring (24) from housing
or endcap.
NOTE: 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.
Figure 3-12. Valve Plate & Rear Shaft Bearing
DO NOT SCRATCH VALVE PLATE SURFACE.
15. Remove valve plate (25) and timing pin (26) from endcap.
NOTE: Each displacement has a unique valve plate. The last two
digits of the 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.
DO NOT DRIVE BEARING PAST REAR SHAFT JOURNAL. BEARING MAY BECOME
TRAPPED ON SHAFT AND DAMAGED.
NOTE: 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 bearing cavity and tap
lightly with a soft mallet on the splined end. Grease will
force out bearing.
18. Remove minimum angle stop (29) and servo spring (30)
from housing.
24
22
23
22. Screw
23. End Cap
24. O-ring
Figure 3-11. End Cap
26
28
29
30
29
27
25
25. Valve Plate
26. End Cap 27. O-ring
28. O-ring 29. Angle Stop
Servo Spring