Manually adjust self-adjusting brakes
It will be a matter of time until your air brakes will wear and will need manually adjustment. There is an entire chain reaction that comes with aging. Because the rubber in the brake chamber stretches the brake arm has to travel more to engage the brakes meaning the car will stop slower.
Follow these steps:
- Use the floor jack to lift the car and put it on the stands. Else way put chocks to the tires.
- Locate the brake chamber near a rear wheel. When you press the brake pedal the push rod goes into the brake chamber. You can use this as a method to locate the brake chamber.
- On the back of the push rod you will find the adjustment nut. Identify the direction it rotates freely to and turn it until the brake shoes are against the drum.
- Now turn it in the opposite direction until you hear it ratcheting. Turn it 1 and a half full turns
- Ask a partner to push the brakes while you measure the distance the push arm travels inside the brake chamber. It’s ok if it travels 1.25 or 1.5 inches. 2 inches is to much.
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