TM 9-2330-390-14&P4-56.CAGING AND UNCAGING BRAKES (Con’t).• DO NOT cage spring In “spring” rear dolly airbrake chamber until wheels have beensecurely chocked. Once rear dolly airbrake chamber spring is caged, dolly set lawithout emergency/parking brakes and can roll. Failure to chock wheels may resultin serious Injury or death to personnel.• DO NOT attempt to cage brakes if rear dolly airbrake chamber shows any signs ofstructural damage. Failure to follow this warning may cause forceful release of thespring chamber and its contents, resulting in serious injury or death to personnel.NOTEWith both the parking and emergency breakaway systems, loss of air pressure causesbrakes to apply. Return of air pressure allows brakes to release. Brakes that have beenapplied due to air pressure loss can be manually released (caged) to allow movementof dolly set or in preparation for maintenance.a . C A G I N G1.2.3.4.Remove dust plug (6) from key hole (7) in rear ofairbrake chamber (1).Remove nut (5) washer (4) and caging stud (2)from storage slot (3). Install caging stud in keyhole (7).Turn caging stud (2) clockwise one-quarter turn.Pull on stud to ensure that stud crosspin is proper-ly seated in pressure plate inside airbrake cham-ber (1).Install washer (4) and nut (5) fingertight on cagingstud (2).4-122
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