Inspection - JLG E450A Service And Maintenance Manual

SECTION 4 - BOOM & PLATFORM
18. Remove the wiper seal (304.1) from its groove in the end
cap (4) and shaft (2).
19. Remove the piston O.D. seal (202).
20. Remove the piston I.D. seal (200). You may now proceed
to the inspection process.
4-20

Inspection

1. Clean all parts in a solvent tank and dry with com-
pressed air prior to inspecting. Carefully inspect all criti-
cal areas for any surface finish abnormalities: Seal
grooves, bearing grooves, thrust surfaces, rod surface,
housing bore and gear teeth.
2. Inspect the thrust washers (304) for rough or worn
edges and surfaces. Measure it's thickness to make sure
it is within specifications (Not less than 0.092" or 2.34
mm).
3. Inspect the wear guide condition and measure thick-
ness (not less than 0.123" or 3.12 mm).
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