Oshkosh Corporation JLG 450AJ, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3121659 – JLG Lift – 4-23
18. Remove piston O.D. seal (12).
19. Remove piston I.D. seal (11).
Inspection
1. Clean parts in a solvent tank and dry with compressed air
before inspecting. Inspect seal grooves, bearing grooves,
thrust surfaces, rod surface, housing bore, and gear teeth
for surface finish abnormalities.
2. Inspect thrust washers (16) for rough or worn edges and
surfaces. Measure thickness to make sure it is not less
than 0.092" (2.34 mm).