JLG 450A_AJ Series II Service Manual - Manual (Page 101)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-51
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 pis-
ton and hold endcap level while removing. 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. 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
bearing 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.
24
22
23
22. Screw
23. End Cap
24. O-ring
Figure 3-29. 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 3-30. Valve Plate & Rear Shaft Bearing