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| Parking on only one axle wouldn't be considered abnormal and that set should lock the wheels on that axle. Before you decide to add another parking brake set you need to get the ones on there to lock the wheels. I would think that would satisfy your parking brake issue. If it doesn't you must be parking on a heck of a grade. Like already stated slack adjuster need to be adjusted right then start looking for other problems, froze or stiff linkage/ cams. I would think you could see the brake lining on the inside of the drum. | |
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Another air brake question
