Section 06-07A: Brake, Power, Vacuum, Single and Tandem Diaphragm | 1996 F-150, F-250, F-350, and Bronco Workshop Manual |
The power brake booster-to-brake master cylinder push rod has an adjustment screw to maintain the correct relationship between the power brake booster control valve plunger and the brake master cylinder piston.
If the power brake booster-to-brake master cylinder push rod is too long, it will prevent the brake master cylinder piston from completely releasing hydraulic pressure, causing the brakes to drag.
If the power brake booster-to-brake master cylinder push rod plunger is too short, it will cause excessive brake pedal travel and an undesirable clunk in the power brake booster area. Remove the brake master cylinder (2140) for access to the power brake booster-to-brake master cylinder push rod.
Fabricate a gauge as illustrated and place it against the brake master cylinder mounting surface of the power brake booster (2005).
Adjust the power brake booster-to-brake master cylinder push rod screw by turning it until the end just touches the inner edge of the slot in the gauge.
| Item | Part Number | Description |
|---|---|---|
| 1 | — | Shop-Fabricated Gauge |
| 2 | — | Adjustment Screw (Part of 2005) |
| A | — | 24.89-25.27mm (0.980-0.995 In.) |
| B | — | 25.27mm (0.995 In.) |
| C | — | 19.05mm (0.75 In.) |
| D | — | 74.61mm (2.94 In.) |