Service Procedure A

FIGURE 1 - PARKING BRAKE ADJUSTMENT:

SERVICE PROCEDURE A (See Figure No. 1)

1. Block the front wheels.

2. Raise and support the rear axle with suitable safety stands.

3. Fully apply parking brake.

4. Remove all brake adjustment by turning adjusting knob (#7) on parking brake lever counter-clockwise until the snap-over-center, when the brake is applied, disappears.

NOTE: There may be a locking screw installed on the adjusting knob, by the Post Office, which will need to be removed prior to adjusting.)

Begin the brake adjustment with the lever in the applied position, continue to turn the knob counter-clockwise until the brake lever starts to move forward.

5. Turn parking brake knob (#7) one full turn clockwise.

6. Make certain handbrake is still in fully applied position.

7. Adjust equalizer nut (#6) using one of two methods:

A. Preferred Method

Using a Kent-Moore cable tension gage P/N J34651-A or a Burroughs Cable Tension Gage, P/N BT3375-W, installed on the right hand intermediate cable between its connecting links, tighten the equalizer nut (#6) to obtain 75-80 inch lbs. (Kent-Moore) or 150 lbs. (Burroughs) cable tension.

B. Alternate Method

Tighten the equalizer nut (#6) until a light drag is felt while rotating the rear wheels forward.

Adjust knob (#7) on parking brake lever clockwise until a definite snap over center is felt when parking brake is applied.

8. Inspection of Front Cable Thread Adjustment:

With the cable system fully adjusted, there should be a minimum of 12 mm (1/2 inch) of thread available between points X and Y. If less than 12 mm (1/2 inch) see Procedure B.
9. If new parking brake cables have been installed, release and fully apply the hand brake lever three times to obtain cable pre-stretch. Re-adjust equalizer nut (#6) and brake lever knob (#7) as necessary.

10. Release brake lever and rotate rear wheels forward. There should be no brake drag.

11. Remove safety stand, lower vehicle, and remove blocks from front wheels.

PARTS REQUIRED

No service parts are required for this adjustment procedure. Labor Time to perform this procedure is .3 hour. Use Labor Op:
H2800.