JLG 500RTS ANSI Service Manual - Manual (Page 33)

SECTION 2 - PROCEDURES
3121103 – JLG Sizzor – 2-17
Inspection
1. Wash all parts thoroughly in a suitable solvent.
2. Examine needle bearings in housing and backplate.
If needles are free of excessive play and remain in
bearing cage, there is no need to replace bearing.
3. Inspect thrust washers and thrust bearing. All sur-
faces should be free of any signs of wear or fretting.
4. Inspect spider and pivot. Conical surfaces should be
free of wear and score marks.
5. Inspect pistons. The O.D. surface should be smooth
and free of scoring. Shoes should be snug fit to pis-
ton. Face of shoes should be flat and free of scoring
and flaking. Do not lap piston shoes.
6. Inspect piston block; bores should be free of scor-
ing. Surface that contacts backplate should be
smooth and free of grooves or metal build-up. Do
not lap piston block.
7. Inspect thrust race; surface should show no signs of
scoring or grooves.
8. Inspect flat surface on backplate; it should be free of
excessive scoring or metal build-up. Do not lap
backplate.
9. Inspect drive shaft for fretting in bearing areas.
Check spline area for twisted or broken teeth. If
keyed shaft, check for cracked or chipped keyway.