JLG M450 ANSI Service Manual - Manual (Page 69)

SECTION 3 - CHASSIS & TURNTABLE
3121127 – JLG Lift – 3-29
15. Remove thrust bearing (15) and thrust washer (14).
Inspect for wear, brinelling, corrosion and a full com-
plement of retained rollers.
16. Remove seal (16) and back up ring (17) from hous-
ing (18) and backup washer (25). Discard both.
17. Remove housing (18) from vise, invert it and remove
and discard seal (20). A blind hole bearing or seal
puller is required.
18. Inspect housing (18) assembly for cracks, the
machined surfaces for nicks, burrs, brinelling or cor-
rosion. Remove burrs that can be removed without
changing dimensional characteristics. Inspect
tapped holes for thread damage. If the housing is
defective in these areas, discard the housing assem-
bly.
19. If the housing (18) assembly has passed inspection
to this point, inspect the housing bearings/bushings
(19) and (13) and if they are captured in the housing
cavity the two thrust washers (14) and thrust bearing
(15). The bearing rollers must be firmly retained in
the bearing cages, but must rotate and orbit freely.
All rollers and thrust washers must be free of brinel-
ling and corrosion. The bushing (19) or (13) to cou-
pling shaft diameter clearance must not exceed
0.010 inch (0.025 mm). A bearing, bushing, or thrust
washer that does not pass inspection must be