JLG 660AJ Service Manual - Manual (Page 72)

SECTION 3 - CHASSIS & TURNTABLE
3-28 – JLG Lift – 3121616
18. Cover shaft splines with an installation sleeve. Install a
new shaft seal (27) with cup side facing motor. Press seal
in housing until it bottoms out. Press evenly to avoid
binding and damaging seal. Install seal support washer
(28) and snap ring (29).
Figure 3-36. Shaft Seal
19. Install remaining plugs and fittings to housing. Refer to
drawing below for wrench sizes and installation torques.
Figure 3-37. Plugs and Fittings Installation
20. Install orifice poppet (30).
21. Install shift spool (31).
22. Install spring retaining washers on springs (32 and 33).
23. Carefully install centering springs (34, 35, and 36).
24. Install new O-rings (37, 38, and 39).
25. Using a 5/8 in wrench torque plug (40) to 20 ft-lb (27
Nm).
26. Using a 11/16 in wrench, torque plugs (41 and 42) to 27
ft-lb (37 Nm).
Initial Start-up Procedures
Follow this procedure when starting-up a new motor or when
installing a motor that has been removed.
Prior to installing the motor, inspect for damage incurred dur-
ing shipping. Make certain all system components (reservoir,
hoses, valves, fittings, heat exchanger, etc.) are clean prior to
filling with fluid.
1. Fill reservoir with recommended hydraulic fluid. Always
filter fluid through a 10 micron filter when pouring into
the reservoir. Never reuse hydraulic fluid.
2. Fill inlet line leading from pump to reservoir. Check inlet
line for properly tightened fittings and be certain it is
free of restrictions and air leaks.
3. Fill pump and motor housing with clean hydraulic fluid.
Pour filtered oil directly in upper most case drain port.
29
28
27
27. Shaft Seal
28. Seal Support Washer
29. Snap Ring
39
40
34
30
41
37
36
33
42
38
35
32
31
(27 Nm)
20 ft.lbs.
5/8 in
(37 Nm)
(37 Nm)
27 ft.lbs.
27 ft.lbs.
11/16 in
11/16 in
30. Orifice Poppet
31. Shift Spool
32. Spring
33. Spring 34. Spring
35. Spring
36. Spring 37. O-ring
38. O-ring
39. O-ring 40. Plug
41. Plug
42. Plug
Figure 3-38. Loop Flushing Spool