Table of Contents
Advertisement
Sec. 13
Page 160
GM COACH MAINTENANCE MANUAL
LUBRICATION
NOTE N0.2
LUBRICATING OIL-SPECIAL
(See Symbol ES on Chart)
The type of oil indicated by symbol "ES" must
be carefully selected, as ordinary engine and gear
oils are not satisfactory.
Oil must be of good
quality SAE 50 such as aviation grade engine oil,
or SAE 50 Heavy Duty engine oil having detergent-
dispersant properties, oxidation resistance, and
anti-foam characteristics.
TRANSMISSION
At 1000 mile intervals, lubricant level should
be checked. If necessary, add sufficient lubricant
to bring level up to "Full" mark on dip stick.
Drain and refill at least every 15,000 miles. Drain
only while transmission is warm.
NOTE: Do not use extreme pressure or hypoid
lubricants in transmission.
NOTE NO. 3
GEAR OIL
(See Symbol G on Chart)
Use gear oil of best quality.
Oils undergo
chemical changes at high temperature with thick-
ening as the result. This instability, which should
not be confused with viscosity (body), may produce
oil that is too thick for adequate lubrication. Gear
oils most resistant to thickening are filtered steam
refined cylinder stock or bright stocks.
REAR AXLE
Keep lubricant to level of filler plug.
Drain
and refill at least every 15,000 miles.
Drain
while lubricant is warm, preferably immediately
after operation.
Use SAE 140 gear oil for sum-
mer, and SAE 90 for winter.
STEERING GEAR HOUSING
Use pressure gun at fitting and apply lubricant
until it is up to level of vent plug.
Use SAE 140
for summer and winter operation.
PROPELLER SHAFT UNIVERSAL JOINT
Use pressure gun at fitting and apply until
lubricant is visible at relief valve.
Use SAE 140
gear oil for summer, and SAE 90 during winter.
NOTE NO. 4
CHASSIS LUBRICANT
(See Symbol C on Chart)
Chassis lubricant should be used at all points
indicated by symbol "C" on lubrication chart.
All pressure gun lubrication points must be
clean before applying gun. Replace all broken or
missing fittings.
Apply sufficient
lubricant to
thoroughly lubricate entire bushing or bearing.
Chassis lubricant should be a high grade cal-
cium or aluminum soap pressure gun lubricant.
Sodium soap grease may be used as chassis lu-
bricant, but more frequent application may be re-
quired during wet weather.
NOTE NO. 5
15% SODIUM SOAP GREASE
(See Symbol S2 on Chart)
A short fiber non-fluid sodium soap (approx-
imately 15%) grease having a high melting point.
CLUTCH RELEASE BEARING
Keep cup full; turn down at intervals indicated
on lubrication chart.
GENERATOR
Keep cups full; turn down at intervals speci-
fied.
CLUTCH PILOT BEARING
Rotate flywheel until plug appears at opening
in bottom of flywheel housing. Remove plug and
install temporary fitting.
Use hand gun to apply
lubricant sparingly. Do not use excessive lubri-
cant. Remove fitting and replace plug.
BRAKE SHOE ANCHOR PINS
Remove plugs, install temporary fittings. Use
pressure gun, apply lubricant sparingly. Remove
temporary fittings and replace plugs.
WHEEL BEARINGS
Remove wheel bearings as instructed in HUBS
AND BEARINGS (SEC. 19 of this manual).
Wash
bearings, hub, and spindle in cleaning solvent. In-
spect hub and bearings.
Coat spindle and inside
of hub with thin coat (approximately 1/8" thick) of
grease to prevent rusting.
Lubricate bearings
thoroughly, using a lubricator or by hand pack
method. Be sure lubricant reaches into all spaces
of the bearing.
DO NOT FILL HUB.
Reinstall
and adjust bearings as directed in HUBS AND
BEARING (SEC. 19 of this manual.)
STEERING GEAR UPPER BEARING
Pack upper bearing at assembly of steering
gear. Refer to SEC. 16 of this manual.
NOTE NO. 6
PETROLEUM JELLY
(See Symbol S3 on·. Chart)
BATTERY TERMINALS
Keep battery terminals clean. At regular pe-
riods, remove cables, clean terminals on cables
and battery. Apply petroleum jelly after tightening
terminals to prevent corrosion.
Advertisement
Table of Contents
