JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3121234 3-63
TAKE CARE NOT TO SCRATCH THE SURFACE OF THE VALVE PLATE.
15. Remove the valve plate (25) and timing pin (26) from the
end cap.
NOTE: Each displacement has a unique valve plate. For identifica-
tion, the last two digits of the valve plate part number are
stamped on its surface.
16. Remove and discard the o-rings (27 and 28).
17. Remove the rear shaft bearing (29) from the end cap
with a bearing puller.
NOTE: The bearing may be difficult to remove with a puller. Try
this as an alternative: Pack the bearing cavity with heavy
grease. After the shaft is removed, insert it into the bearing
cavity and tap lightly with a soft mallet on the splined end.
The grease will force the bearing out. Use caution not to
drive the bearing past the rear shaft journal as the bearing
may become trapped on the shaft and damaged.
18. Remove minimum angle stop (29) and servo spring (30)
from the housing.
19. Turn the housing on its side and remove the cylinder kit
assembly (31). Set the assembly aside, being careful not
to scratch the running surface.
NOTE: Grooves on the surface of the cylinder kit identify its dis-
placement:
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 3-42. Valve Plate & Rear Shaft Bearing
Table 3-2. Displacement Identifiers
# of Grooves Frame L Frame K
1 25 38
2 30 45
3 35 - -
31
31. Cylinder Kit Assembly
Figure 3-43. Cylinder Kit
32
33
34
32. Snap Ring
33. Support Washer
34. Shaft Seal
Figure 3-44. Shaft Seal