How to Adjust Overly Aggressive Air Brakes?

1 Answers
LeSavannah
07/29/25 9:28pm
Air brake adjustment method: First locate the adjustment nut on the rear wheel's slack adjuster. Use a 17-19mm box-end wrench placed on it, then tap it gently with a hammer until properly adjusted - it will automatically return to position. For brake chambers, remember 'left loose, right tight'. After adjustment, use a jack to lift the axle (with no load) until the wheel can be rotated by hand, then tighten completely. Note: Passenger car brakes cannot and don't need adjustment. Cars use hydraulic brake systems where brake fluid decreases as pads wear, but the preset gap between pads and rotors remains constant from factory settings. With proper use and maintenance, no adjustment is required.
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