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When checking the free play of manual slack adjusters on s-cam brakes, you should:
Stop on level ground and apply the parking brake.
Park on level ground and drain off all air pressure before adjusting.
Park on level ground, chock the wheels, and release the parking brake.
Park on a slight grade, release parking brake, apply the service brake, and check rolling distance.
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When checking the free play of manual slack adjusters on s-cam brakes, you should:...