Wheel Drive Shafts Description and Operation M76
The rear wheel drive axles are flexible assemblies.
The rear wheel drive axles consist of the following components:
| • | 2 wheel drive inner and outer shaft tri-pot joints. |
| • | A wheel drive shaft bar. |
| | The wheel drive shaft batr connects the wheel drive shaft tri-pot joints. |
The wheel drive shaft tri-pot joints are completely flexible. Both
wheel drive shaft tri-pot joints can move in and out.
Seals And Clamps
The rear wheel drive shaft tri-pot joint seals on the wheel drive
axle are made of a thermoplastic material.
The clamps on the rear wheel drive axle seals are made of stainless
steel.
The seals provide the following functions:
| • | Protection of the internal parts of the wheel drive shaft tri-pot
joints. |
| | The seals protect the grease from the following sources of damage: |
| - | Harmful atmospheric conditions, such as extreme temperatures or
ozone gas. |
| - | Foreign material, such as dirt or water. |
| • | Allows the angular and the axial movement of the rear wheel drive
shaft tri-pot joints. |
Important: Protect the seals from sharp tools and from the sharp edges of the surrounding
components.
Any damage to the seals or the clamps will result in leakage. Leakage
will allow water to leak into the rear wheel drive shaft tri-pot joints.
Damage will also allow grease to leak out of the wheel drive shaft tri-pot
joints.
Leakage and the loss to grease may cause noisy wheel drive shaft tri-pot
operation and eventual failure of the internal components.
The clamps provide a leak proof connection for the wheel drive shaft
tri-pot joints at the following locations:
| • | The wheel drive shaft bar. |
The thermoplastic material performs well under normal conditions and
normal operation. However, the material is not strong enough to withstand
the following conditions:
| • | Damage from sharp objects, such as tools or sharp edges of the
surrounding vehicle components. |
Rear Wheel Drive Shaft Tri-pot Joints
The rear wheel drive shaft tri-pot joints are made without an over-extension
limitation retainer. Care must be exercised when removing and installing the
rear wheel drive shafts in order not to over-extend the tri-pot joints.
Damage and tri-pot failure may result.
The joint is constructed as follows:
| • | The wheel drive axle has a female spline. The female spline installs
over an axle shaft that protrudes from the rear differential. |
| • | The wheel drive axle utilizes a barrel-type retaining ring in
order to positively secure the inner tri-pot joint to the rear differential
axle shaft. |
