- With the transmission in neutral and the front propeller shaft
removed from the transmission yoke, rotate the park brake drum one full turn.
- The effort required to rotate the drum should remain consistent
as the drum is turned.
- If effort is excessive, inspect for corrosion or weak springs.
- If the effort required to rotate the drum alternates between
low effort and high effort, the drum may be out-of-round and requires replacement.
- Remove the drum. Refer to
Propeller Shaft Parking Brake Drum Replacement
.
- With the brake drum removed, clean the braking, friction, surface
of the brake drum with denatured alcohol or an equivalent approved brake
cleaner.
- Inspect the braking surface of the brake drum for the following
Braking Surface Conditions:
| • | Heavy rust and/or pitting |
| • | Light surface rust can be
removed with an abrasive disc. Heavy surface rust indicates the drum must
be replaced. |
| • | Cracks and/or heat spots |
| • | Excessive blueing discoloration |
| • | Missing balance weights |
- If the braking surface of the brake drum exhibits 1 or more of
the Braking Surface Conditions, the drum.