JLG 450A_AJ Series II Service Manual - Manual (Page 284)

SECTION 4 - BOOM & PLATFORM
4-18 – JLG Lift – 3121180
Inspection
1. Clean all parts in a solvent tank and dry with com-
pressed air before inspecting. Carefully inspect all
critical areas for any surface finish abnormalities:
Seal grooves, bearing grooves, thrust surfaces, rod
surface, housing bore and gear teeth.
2. Inspect 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 wear guide condition and measure thick-
ness (not less than 0.123" or 3.12 mm).
Assembly
1. Gather all components and tools to one location
before reassembly. Use cut-away drawing to refer-
ence seal orientations.