The new variety of decelerations should be conducted below:

The new variety of decelerations should be conducted below:

4.dos Braking system energy. Whenever attached to a keen inertia dynamometer, for each and every brake would be capable of making ten successive decelerations at the the typical rate regarding 9 f.p.s.p.s. regarding 50 yards.p.h. to help you fifteen meters.p.h., on equivalent times out of 72 mere seconds, and you can can be ready decelerating so you can a stop out-of 20 meters.p.h. in the the common deceleration rates away from 14 f.p.s.p.s. one-minute following the 10th deceleration.


4.2.1 Which have a first braking system temperature between 150 °F. and you can 2 hundred °F. to the first braking system software, as well as the drum or disc rotating at the a rate comparable to 50 yards.p.h., apply the fresh brake and you can slow down during the an average deceleration rate away from 9 f.p.s.p.s. to help you 15 yards.p.h. On getting together with 15 yards.p.h., speed to help you fifty yards.p.h. and implement the fresh brake to possess an extra date 72 mere seconds immediately after the start of the original software. Repeat the brand new stage until 10 decelerations have been made. The service range sky tension should perhaps not surpass one hundred psi during the any deceleration.

The service range heavens tension necessary to getting an increase from a dozen f

4.2.2 An additional adopting the prevent of the past deceleration necessary from the 4.dos.step 1 and with the guitar otherwise disk spinning on a speed out-of 20 yards.p.h., decrease to a stop during the the common deceleration price from 14 f.p.s.p.s.

cuatro.step 3 Braking system healing. Except since the offered during the cuatro.3(a) and you can (b), performing a few minutes once finishing the newest testing required by 4.dos, good vehicle’s brake will likely be able to make 20 successive finishes away from 31 mph in the an average deceleration speed out of 12 f.p.s.p.s., during the equal menstruation of one minute counted from the start from for every single braking system application. p.s.p.s. should be only 85 lb/in two , and never lower than 20lb/in 2 getting a braking system maybe not subject to the control over a keen antilock program, or twelve lb/in 2 to possess a brake at the mercy of the fresh command over an antilock program.

(b) Despite cuatro.3, neither front axle brake of a shuttle otherwise a trailer other than a trailer-tractor was at the mercy of the requirement set forth within the cuatro.3 prohibiting this service membership line air pressure of getting less than 20 pound/in two to own a braking system perhaps not at the mercy of brand new control over a keen antilock system otherwise several lb/in two for a brake at the mercy of the new command over an antilock program.

5.step one Antilock system description. Toward a trailer tractor were created to your or after March 1, 1997, that is equipped with an enthusiastic antilock brake system and an individual device car are made on the otherwise immediately following March step 1, 1998, which is equipped with an enthusiastic antilock brake system, a fail one has an effect on new generation otherwise indication regarding reaction or manage indicators of every a portion of the antilock program should not improve actuation and you may discharge days of the service brakes.

5.2 Antilock program electricity – trailers. With the a trailer (also a trailer converter dolly) are manufactured toward otherwise after February step 1, 1998, that’s equipped with a keen antilock program that needs electrical energy to possess operation, the power are going to be obtained from the new towing car by way of you to or even more electric circuits which offer persisted strength when the pushed vehicle’s ignition (start) key is in the “on” (“run”) standing. This new antilock program will immediately receive strength throughout the stoplamp routine, when your primary routine or circuits are not performing. Each truck (together with a truck converter dolly) are produced into the otherwise once February step one, 1998, that is provided in order to tow some other air-braked automobile should be equipped with no less than one circuits and therefore offer how does green singles work carried on power to the brand new antilock system to your auto(s) they tows. Particularly circuits can be adequate to allow the antilock program into for each towed vehicle is completely operable.