Chevrolet Light Duty Truck 1973, Service Manual

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GENERAL IN F O R M A T IO N A N D LU BR IC A TIO N 0 -1 7
Propeller Shaft Centering Ball
A centering ball at the transfer case end of the front
propeller shaft on Four Wheel Drive Models should be
lubricated every 24,000 miles with water resistant EP
chassis lubricant which meets General Motors Specifica­
tion GM 6031-M. More frequent lubrication may be
required on heavy duty off the road operations.
NOTE: A special needle nose grease gun
adapter for flush type grease fitting is
required to lubricate the centering ball.
Front Axle
The front axle should be checked every 6,000 miles or 4
months and refilled with SAE 90 GL-5 Gear Lubricant
when necessary. With the differential at operating
temperature, fill to the level of filler plug hole. If
differential is cold, fill to level of 1/2" below the filler
plug hole. For vehicles normally operated in Canada use
SAE 80 GL-5 Gear Lubricant.
Air Vent Hoses
Check vent hose at front axle and at transfer case for
kinks and proper installation every 6,000 miles or 4
months.
Transfer Case
Check the transfer case level every 6,000 miles or 4
months and, if necessary, add lubricant as follows:
Conventional Four Wheel Drive
Add SAE 80 or SAE 90 GL-5 Gear Lubricant to bring to
level of filler plug hole.
Full Time Four Wheel Drive
Add engine oil to bring to level 1/2" below filler plug
hole.
Control Lever and Linkage
Since no grease fitting is provided in the control lever it
is necessary to brush or spray engine oil on the lever
pivot point and on all exposed control linkage every
6,000 miles or 4 months.
SPEEDOMETER ADAPTER
On vehicles so equipped, lubricate adapter at fitting with
water resistant EP chassis grease which meets General
Motors Specification GM 6031-M every 6,000 miles.
DRIVE O N HOIST
BUMPER JACK LIFTING
FLOOR JACK OR HOIST LIFT
Fig. 7—G Model Lifting Points
LIGHT DUTY TRUCK SERVICE MANUAL