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TRANSFER CASE
CLEANING & INSPECTION
Cleaning
Note :
Before cleaning, check the magnets for the
presence of metal particles. It indicates
internal chipping of the transfer case.
Using cleaning solvent, clean the old oil and dirt
deposits.
Dry the parts with low pressure compressed air.
(20 PSI max)
Lubricate ball bearings and needle bearings with ATF
oil. Protect lubricated bearings from dust.
Note : Always replace the hose coupling, O-Ring &
oil seal with new parts.
NORMAL GEAR
SHAVE MARKS
NORMAL GEAR
GRIND MARKS
Fig. 17
Inspection terms
:
Burr
Local rise of material forming
protruding sharp angle
Chip
An area from which a small
fragment has broken off or cut
Crack
Surface break of line nature
indicating partial or complete
separation of material.
Excessive wear
Heavy or obvious wear beyond
expectations,
considering
conditions of operation.
Indentation
Displacement of material caused
by localized heavy contact
Galling
Breakdown of metal surfaces
because of excessive friction
between parts. Particles of the
soft material are torn loose and
welded to the harder material.
Nick
Local break or notch. Usually
displacement of material rather
than loss.
Scoring
Tear or break in metal surface
from contact under pressure. May
show discoloration caused
because of heat generated by
friction
Step wear
Heavy wear that produces step
that can be seen or felt between
adjacent contact and non-contact
surfaces.
Uneven wear
Condition of localized, unevenly
distributed wear. Includes
hollows, shiny spots, uneven
polish and other visual conditions.
DESCRIPTION ACCEPT
REJECT
DESIRED
CONTACT
PATTERN
END
CONTACT
PATTERN
TRAVELLING
CONTACT
PATTERN
(MOVES
FROM SIDE
TO SIDE)
HIGH
CONTACT
PATTERN
LOW
CONTACT
PATTERN
Fig. 18