Gradall 534B (9103-1390) Service Manual - Manual (Page 147)

Housings
Clean interior and exterior of housings, bearing caps,
etc., thoroughly. Cast parts may be cleaned in hot sol-
ution tanks with mild alkali solutions providing these
parts do not have ground or polished surfaces. Parts
should remain in solution long enough to be thorough-
ly cleaned and heated This will aid the evaporation of
the cleaning solution and rinse water. Parts cleaned
in solution tanks must be thoroughly rinsed with clean
water to remove all traces of alkali. Cast parts may also
be cleaned with steam cleaner.
CAUTION: Care should be exercised to avoid skin
rashes and inhalation of vapors when using alkali
cleaners.
All parts cleaned must be thoroughly dried immedi-
ately by using moisture-free compressed air or soft,
lintless absorbent wiping rags free of abrasive materi-
als such as metal filings, contaminated oil or lapping
compound.
INSPECTION
The importance of careful and thorough inspection
all parts cannot be overstressed. Replacement of all
parts showing indication of wear or stress will elimi-
nate costly and avoidable failures at a later date.
Bearings
Carefully inspect all rollers, cages and cups for wear,
chipping or nicks to determine fitness of bearings for
further use. Do not replace a bearing cone or cup
individually without replacing the mating cup or cone
at the same time After inspection dip bearings in
clean light oil and wrap in clean lintless cloth or paper
to protect them until installed.
Oil Seals, Gaskets and Retaining Rings
Replacement of spring load oil seals, “O” rings,
metal sealing rings, gaskets and snap rings is more
economical when unit is disassembled than premature
overhaul to replace these parts at a future time. Fur-
ther loss of lubricant through a worn seal may result
in failure of other more expensive parts of the assem-
bly. Sealing members should be handled carefully
particularly when being installed. Cutting, scratching
or curling under of lip of seal seriously impairs its
efficiency. Apply a thin coat of Permatex No. 2 on
the outer diameter of the oil seal to assure an oil tight
fit into the retainer. When assembling new metal type
sealing rings, same should be lubricated with coat of
chassis grease to stabilize rings in their grooves for
ease of assembly of meeting members. Lubricate all
“O” rings and seals with recommended type Automatic
Transmission Fluid before assembly.
Gears and Shafts
If magna-flux process is available, use process to
check parts Examine teeth on all gears carefully for
Figure 124
If reverse clutch piston ring sleeve is to be replaced,
remove as shown.
CLEANING AND INSPECTION
CLEANING
Clean all parts thoroughly using solvent type clean-
ing fluid. It is recommended that parts be immersed in
cleaning fluid and moved up and down slowly until all
old lubricant and foreign material is dissolved and parts
are thoroughly cleaned.
CAUTION: Care should be exercised to avoid skin
rashes, fire hazards and inhalation of vapors when
u s i n g s o l v e n t t y p e c l e a n e r s .
Bearings
Remove bearings from cleaning fluid and strike
larger side of cone flat against a block of wood to dis-
lodge solidified particles of lubricant. Immerse again
in cleaning fluid to flush out particles. Repeat above
operation until bearings are thoroughly clean. Dry
bearings using moisture-free compressed air. Be care-
ful to direct air stream across bearing to avoid spin-
ning. Do not spin bearings when drying. Bearings
may be rotated slowly by hand to facilitate drying
process.
Figure 123
Remove bearing from support. Remove support oil
sealing ring and sealing ring expander spring.
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