Practice question

What is the function of the spring brake release bolt (caging bolt)?

To lock the slack adjuster arm to the brake camshaft permanently
To mechanically compress (cage) the parking spring so the vehicle can be moved if air pressure is unavailable
To adjust the lining-to-drum clearance on automatic slack adjusters
To bleed off water and oil from the spring brake chamber

Answer: B — To mechanically compress (cage) the parking spring so the vehicle can be moved if air pressure is unavailable

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