JLG 600A Service And Maintenance Manual page 141

SECTION 3 - CHASSIS & TURNTABLE
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.
Inspection Areas
16. Remove and discard seal ring (4) from housing (18).
3-82
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 backup ring (17) from housing (18)
and backup washer. Discard both.
3121201