JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
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20. Turn the housing over and remove the snap ring (32)
retaining the shaft seal and support washer. Remove the
support washer (33) and carefully pry out the shaft seal
(34). Discard the seal.
NOTE: To avoid damaging the shaft during seal removal. Install a
large sheet metal screw into the chuck of a slide hammer.
Drive the screw into the seal surface and use the slide ham-
mer to pull the seal.
21. Remove the inner snap ring (35) and the shaft / bearing
assembly.
22. Remove the snap-ring (36) retaining the shaft front
bearing. Pull the bearing (37) off of the shaft (38).
23. Turn housing over and remove the swashplate (39) by
lifting on the end opposite the servo lever.
24. Remove the servo piston (40). Remove the piston seal
(41) and o-ring (42) from the servo piston. Discard the
seal and o-ring.
25. Remove the journal bearings (43) from the housing. If
the bearings are to be reused, note the location and ori-
entation of each bearing for reassembly.
38
37
36
35
35. Inner Snap Ring
36. Snap Ring
37. Bearing
38. Shaft
Figure 3-45. Shaft & Front Bearing
41
42
40
Lift here
39
43
39. Swashplate
40. Servo Piston
41. Piston Seal
42. O-ring
43. Journal Bearings
Figure 3-46. Swashplate & Servo Piston