cuatro.dos Brake fuel. Whenever attached with an inertia dynamometer, each braking system are able to make ten consecutive decelerations at the common price regarding 9 f.p.s.p.s. regarding 50 meters.p.h. so you’re able to fifteen yards.p.h., on equal times out of 72 moments, and you will will be capable of decelerating to help you a stop away from 20 m.p.h. at the average deceleration speed from fourteen f.p.s.p.s. one minute pursuing the 10th deceleration.
cuatro.2.step one That have a primary brake temperature ranging from 150 °F. and you may two hundred °F. towards the very first brake application, and the instrument otherwise disk spinning from the a speeds comparable to 50 m.p.h., use the new brake and you may decrease during the the average deceleration rate away from nine f.p.s.p.s. to 15 yards.p.h. Upon getting 15 meters.p.h., speed to help you fifty yards.p.h. and implement the fresh new brake to have the second day 72 mere seconds shortly after the beginning of the initial application. Recite brand new course until ten decelerations were made. This service membership line sky pressure shall perhaps not surpass a hundred psi through the one deceleration.
cuatro.dos.dos The second following end of the past deceleration necessary of the 4.2.step 1 and with the instrument or disc rotating in the a speed out-of 20 m.p.h., slow down to help you a stop in the the average deceleration rate out-of fourteen f.p.s.p.s.
4.step 3 Brake recovery. 3(a) and you may (b), carrying out a couple of moments immediately after doing new testing necessary for cuatro.2, an excellent vehicle’s brake might be able to make 20 successive 
(b) In spite of cuatro.step 3, neither top axle brake from a bus or a truck almost every other than just a trailer-tractor are at the mercy of the necessity set forth during the 4.step 3 prohibiting this service membership range heavens tension off getting lower than 20 pound/in two to have a brake not susceptible to this new control of an antilock program otherwise several pound/in two getting a braking system susceptible to the fresh command over a keen antilock system.
5.step one Antilock program malfunction. On the a truck tractor are available for the or shortly after March step 1, 1997, which is armed with an antilock brake system and you can one tool automobile are produced with the otherwise immediately after March step one, 1998, which is armed with a keen antilock brakes, a fail one influences the fresh generation otherwise indication off impulse or control indicators of every part of the antilock program will not improve actuation and you can release times of the service brake system.
5.dos Antilock program electricity – trailers. Towards a truck (including a truck converter dolly) are made on otherwise just after March step 1, 1998, that’s armed with a keen antilock system that really needs electrical power to possess operation, the benefit will be extracted from new towing car using you to or higher electricity circuits which offer proceeded fuel whenever pushed vehicle’s ignition (start) switch is in the “on” (“run”) updates. The fresh antilock system should instantly receive electricity on stoplamp circuit, in the event the primary circuit or circuits are not functioning. Per trailer (plus a truck converter dolly) manufactured on the otherwise after March 1, 1998, that’s provided so you can tow other air-braked automobile should be equipped with no less than one circuits and that give carried on power to the fresh new antilock system with the vehicles(s) they tows. Particularly circuits would be sufficient to permit the antilock program to your for every single towed car to-be completely operable.