Steering Gear Lubricant - Symbol "Sg; High Temperature Grease - Symbol "S2; Wheel Bearings; Other High Temperature U S E S - GMC 4000 Series Service Manual

Sec. 0
Page 14
LUBRICATION
The lubricant indicated by the symbol "SG" is
a special steering gear lubricant. No. 0 grade with
low cold test characteristics and extreme pressure
properties. This type of lubricant is marketed by
many oil companies.
Multi-Purpose gear lubricant "MP" previously
described, may be used to replenish steering gear
The type of lubricant indicated by the symbol
"S2" on charts should be a short fiber, non-fluid,
sodium soap grease having a high melting point
(350 F., min.). Good quality lithium soap grease
is also highly recommended, especially where
corrosion is evident due to moisture. Use No. 2
grade in each case.

WHEEL BEARINGS

CLEANING
With a stiff bristle brush and cleaning solvent,
thoroughly clean bearings and hubs, making sure
that all old lubricant and dirt is removed. Check
bearings and cups and replace damaged parts.
PACKING
Some wheel bearings are lubricated from axle
differential after the initial lubrication. However,
The following points require use of high temp-
erature grease at assem bly. Methods of applying
grease to these points are covered in applicable
sections of this manual.
The type lubricant indicated by the symbol
"S3" is petroleum jelly or petrolatum.

BATTERY TERMINALS

To prevent corrosion, remove cables, clean
terminals on cable and battery, and reinstall cables
G M C S E R V I C E M A N U A L
STEERING GEAR LUBRICANT
(SYMBOL "SG" O N CHARTS)
housing when additional lubricant is required; how­
ever, lubricant as described previously must be
used as initial fill after overhaul, or in a new gear.
housing and add lubricant to bring level up to filler
plug opening. Do not. overfill housing.
HIGH TEMPERATURE GREASE
(SYMBOL "S2" O N CHARTS)
whenever wheel hub is removed, bearings should
be cleaned, inspected, and re-lubricated. Some
rear wheel bearings require cleaning, inspection,
and lubrication at regular intervals as specified
on lubrication charts.
is kneaded between rollers and races. A mechan­
ical lubricator can be used; however, bearings
must be thoroughly lubricated.
spindle with thin coat (1/8" thick) of grease to re­
tard rusting. Allow some excess grease at inner
side of bearings and around adjusting nut. DO NOT
PACK HUB WITH GREASE. The lubricant applied
to bearings is sufficient to provide lubrication until
next service period. Readjust bearings as des­
cribed in "FRONT HUBS AND BEARINGS" (SEC.
3D) or "REAR HUBS AND BEARINGS" (SEC. 4D)
of this manual.
OTHER HIGH TEMPERATURE
GREASE USES
PETROLEUM JELLY
(SYMBOL "S3" ON CHARTS)
to battery terminals. Tighten cables securely,
then apply petroleum jelly.
DISTRIBUTOR BREAKER CAM
amount of petroleum jelly on distributor breaker
cam. Do not use an excessive amount.
At specified intervals, remove filler plug in
When packing by hand, be sure that lubricant
DO NOT FILL HUB. Coat inside hub and axle
Clutch Pilot Bearing
Clutch Release Bearing Collar
Clutch Shift Fork Ball Stud
Steering Column Upper Bearing
At recommended intervals, apply a small