GENERAL Master
BOTTOMING
Symptom
Probable cause
Reference page or remedy
Bottoming
Malfunctioning shock absorber
WHEEL BEARING TROUBLESHOOTING
Trouble
Pitting
Flaking
Cracking
Sympton
Probable cause
Pitting occurs because of uneven rotation of race
Excessive bearing preload
and bearing surfaces
load
The surface peels because of uneven rotation of
End of bearing life ,
the race and bearing surfaces
Improper bearing assembly
Chipping or cracking of cage or roller edges
Impact when
was installed
(such as being hit with a hammer)
Flat spotting
When large load is applied, race and roller
contact surfaces compress, forming
indentations
Excessive bearing preload
Excessive load
Vibration when bearings are not
used, such as during shipment on
freight cars, transport trucks, etc.
Nicks
Instead of roiling along race surface, rollers slide,
insufficient grease
thus damaging surface
Excessive bearing preload
Excessive load
Faulty oil seal
Smearing
Damage or wear caused by minute particles
Excessive variation of loads on
adhering to surfaces results in
movement
bearings
and such high temperatures that parts of surface
Use of grease other than that
melt
specified
Insufficient grease
Rust, corrosion
Appears on various areas of the bearing
Use of grease other than that
specified
Faulty oil seal
Presence of water or moisture
Wear
Wear of surface areas caused by friction
Insufficient grease
Foreign matter
Rust or corrosion due to moisture
Use of grease other than that
specified
Faulty oil seal
Grease discoloration results from grease
deterioration which causes
of
pigment contained in grease to adhere
to surfaces
Heat discoloration will appear
as a deep brown on purple
Use of grease other than that
specified
Faulty oil seal
Excessive bearing preload
Excessive load
TSB Revision
Summary of Contents for 1989 Galant
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