The brand new variety of decelerations are presented the following:
cuatro.dos Brake power. Whenever attached to an inertia dynamometer, for every brake shall be capable of making ten successive decelerations from the the common rate of 9 f.p.s.p.s. out of 50 m.p.h. so you can 15 meters.p.h., at the equal times out of 72 moments, and you can are going to be able to decelerating so you’re able to a halt of 20 yards.p.h. during the the typical deceleration rates away from fourteen f.p.s.p.s. about a minute adopting the 10th deceleration.
4.dos.step 1 Which have a first brake temperatures ranging from 150 °F. and you may 2 hundred °F. to the first brake app, as well as the guitar or disk rotating on an increase equal to fifty m.p.h., incorporate brand new braking system and you can delay at the average deceleration rate from nine f.p.s.p.s. to help you fifteen yards.p.h. Through to getting together with 15 m.p.h., speeds in order to 50 meters.p.h. thereby applying the newest brake to have the next day 72 mere seconds just after the start of the original app. Repeat this new duration up to ten decelerations have been made. This service membership range air pressure should perhaps not go beyond 100 psi during any deceleration.
This service membership range sky tension needed seriously to to have a rate off twelve f
cuatro.dos.dos An additional after the avoid of one’s history deceleration needed by cuatro.dos.step one along with the musical instrument otherwise disk spinning from the a performance out-of 20 m.p.h., reduce in order to a stop on an average deceleration price out of 14 f.p.s.p.s.
4.step bulmak 3 Braking system data recovery. Except since the provided in cuatro.3(a) and you will (b), creating a couple of times once doing the new tests necessary for cuatro.dos, a good car’s brake will likely be capable of making 20 straight comes to an end of 29 mph within the common deceleration price regarding a dozen f.p.s.p.s., within equivalent durations of just one time measured from the start off each braking system app. p.s.p.s. will likely be not more than 85 pound/in 2 , and never lower than 20lb/in 2 getting a brake perhaps not subject to the latest control of an enthusiastic antilock program, otherwise a dozen pound/in 2 for a braking system at the mercy of the fresh new command over an enthusiastic antilock program.
(b) Notwithstanding cuatro.step three, neither top axle braking system away from a coach or a trailer other than just a truck-tractor was at the mercy of the requirement established in cuatro.step three prohibiting the service line heavens pressure off becoming less than 20 pound/in two to own a brake perhaps not susceptible to the brand new control over a keen antilock system otherwise a dozen pound/in 2 to have a brake susceptible to new command over an antilock system.
5.step 1 Antilock system dysfunction. On the a trailer tractor are designed toward or after February 1, 1997, which is armed with an antilock brakes and a single product vehicle are produced on the otherwise immediately following February step one, 1998, which is equipped with a keen antilock brake system, a fail you to has an effect on the fresh new age bracket or alert regarding impulse or manage signals of every part of the antilock system should not improve the actuation and you may launch times of the service brake system.
5.dos Antilock system energy – trailers. Towards a trailer (plus a truck converter dolly) are manufactured to your otherwise just after February step 1, 1998, that’s armed with a keen antilock program that needs electricity for process, the advantage is going to be extracted from the fresh new pulling car as a result of that or even more electric circuits which provide persisted power if the driven automobile’s ignition (start) key is in the “on” (“run”) position. The newest antilock program should instantly found fuel in the stoplamp routine, if for example the no. 1 circuit otherwise circuits aren’t working. For each trailer (as well as a trailer converter dolly) are available toward otherwise just after February step 1, 1998, that is equipped to help you pull several other sky-braked car are equipped with one or more circuits hence promote carried on power to the latest antilock program with the vehicle(s) it tows. Eg circuits might be enough to enable the antilock system to the for every towed vehicles getting totally operable.