JLG 450A_AJ Series II Service Manual - Manual (Page 318)

SECTION 5 - HYDRAULICS
5-28 – JLG Lift – 3121180
Inspect Parts For Wear
1. Clean and dry all parts thoroughly before inspection.
It is not necessary to inspect seals. They will be
placed as new items.
2. Check drive shaft spine for twisted or broken teeth,
check keyed drive shaft for broken or chipped key-
way. No marks or grooves on shaft in seal area,
some discoloration of shaft is allowable.
3. Inspect drive gear shaft and idler gear shafts at bearing
points and seal area for rough surfaces and excessive
wear.
4. Inspect gear face for scoring or excessive wear. If
face edge of gear teeth are sharp, they will mill into
the bearing blocks. If wear has occurred, parts are
unusable.
5. Inspect bearing blocks for excessive wear or scoring
on surfaces in contact with gears. Inspect bearings
for excessive wear or scoring.
6. Inspect area inside gear housing. A clean ”wipe” on
the inside surface of the intake side is normal. There
should not be excessive wear, deep scratches, or
gouges.