Drive Shaft Maintenance
Rotating shafts can be dangerous. You can snag clothes, skin, hair, hands, etc.
This can cause serious injury or death. Do not work on a shaft (with or without a
guard) when the engine is running.
UNIVERSAL JOINTS
To insure proper lubrication of the bearing assemblies, it is essential to add lubricant until it
appears at all journal cross bearing seals (1). This assures removal of dirt particles and
other contaminants that may find their way into the bearings and indicates to the mechanic
that the bearings are fully lubricated.
Do not assume that bearing cavities have been filled with new lubricant unless
flow is noticed around all four bearing seals! (1).
If all the seals do not “pop” when being lubed, move the drive shaft laterally in all four
directions and pull or push on the drive shaft in the direction opposite to the journal cross
seal not relieving while lube gun pressure is being applied to the alemite fitting.
It is recommended that all universal joints be relubed after installation of the drive
shaft prior to putting a vehicle in service.
JOURNAL AND BEARING KITS
It is necessary to completely lubricate each replacement kit prior to assembly into the drive
shaft yokes. Each journal cross lube reservoir should be fully packed with a recommended
grease and each bearing assembly should also be wiped with the same grease; filling all
the cavities between the rollers and applying a liberal grease coating on the bottom of each
race. After the kits are installed into the drive shaft yokes and prior to placing into service,
they should be relubed, through the zerks, using the same grease.
T300-1_T500-1_T780
Maintenance
312 P/N 12261-683
REVISED: January 2015
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