JLG T500J, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3121200 3-47
15. Remove coupling shaft (12), by pushing on the output
end of shaft. Inspect coupling shaft bearing and seal sur-
faces for spalling, nicks, grooves, severe wear or corro-
sion and discoloration. Inspect for damaged or worn
internal and external splines or keyway. Replace cou-
pling shaft if any of these conditions exist.
NOTE: Minor shaft wear in seal area is permissible. If wear exceeds
0.020 inches (0.51 mm) diametrically, replace coupling
shaft.
NOTE: A slight “polish” is permissible in the shaft bearing areas.
Anything more would require coupling shaft replacement.
16. Remove and discard seal ring (4) from housing (18).
17. Remove thrust bearing (15) and thrust washer (14)
Inspect for wear, brinelling, corrosion and a full comple-
ment of retained rollers.
18. Remove seal (16) and back up washer (17) from Small
Frame, housing (18). Discard both.
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19. Remove housing (18) from vise, invert it and remove and
discard seal (20). A blind hole bearing or seal puller is
required.