(b) From the option of the producer, to have vehicles armed with brake expertise and that utilize a familiar diaphragm, the latest performance standards given inside the 6(a) and therefore need to be confronted with people single leakages-sort of incapacity in a common diaphragm will get rather end up being confronted by the level of leakage-types of failure computed when you look at the 6.eight. 6(a) and that apply with unmarried leakages-type of problems apart from problems inside a common diaphragm.
(c) During the accessibility to the manufacturer, new truck portion of one agricultural commodity trailer, hefty hauler truck, or pulpwood truck may qualify out-of § associated with title as opposed to the requirements out of 6(a).
six.step 1 Static retardation push. With all of most other brake system made inoperative, while in the a fixed drawbar pull in an onward otherwise rearward guidelines, brand new fixed retardation force developed by the usage the parking brake system might be:
(a) Regarding a car or truck except that a truck-tractor that is equipped with over a couple of axles, in a manner that the fresh new quotient static retardation force/GAWR is not below 0.28 the shaft aside from a good steerable front side shaft; and you will
With all of parking brakes used, the auto should are still fixed up against constant and you will against down hill towards the a soft, inactive portland concrete concrete path which have good 20-percent stages, both
(b) Regarding a truck-tractor that is armed with more two axles, in a manner that this new quotient static retardation force/GVWR is not below 0.14.
six.step 3.step one This new vehicle parking brakes should be ready attaining the minimum abilities specified in both six.1 otherwise six.2 which have people unmarried leakages-form of inability, in just about any other brakes, out of a part designed to incorporate compressed air or brake fluid (excluding incapacity regarding a component of a brake chamber homes however, in addition to failure of every brake chamber diaphragm that is element of almost every other brakes also a diaphragm that is popular so you’re able to the vehicle parking brakes and just about every other brakes), if the challenges about vehicle’s vehicle parking braking system compartments reaches the levels determined from inside the six.3.cuatro.
6.step three.dos A mechanized function are going to be provided that, just after a parking braking system software is fashioned with new pressures within the this new vehicle’s parking braking system spaces in the membership calculated into the 6.step 3.cuatro, and all heavens and you can liquid pressures on car’s stopping systems try after that bled down seriously to no, and without best tinder bios to get laid needing electrical energy, holds the newest parking braking system software with enough parking retardation force to meet up with the minimum show given inside six.step three.step 1 plus often six.step one otherwise 6.dos.
six.step 3.3 To have automobiles and you may buses, with an initial reservoir program stress away from 100 psi and you will, if the designed to pull a car or truck armed with heavens brakes, which have a beneficial 50 cubic inch take to reservoir connected to the have range coupling, zero later than about three mere seconds since away from actuation off the vehicle parking brake control, the newest technical mode referred to for the 6.3.2 can be actuated. Having trailers, to the have line initially pressurized so you’re able to one hundred psi using the likewise have line part of the truck test rig (Shape step one) and you will, in the event the made to pull a motor vehicle armed with sky brakes, that have an effective fifty cubic inch take to reservoir attached to the buttocks also provide range coupling, no later than just about three mere seconds since that time ventilation to your environment of one’s top supply line coupling is established, the latest technical form known for the 6.step 3.dos are actuated. Which criteria are going to be came across to possess cars, vehicles and you can trailers each other which have and you can without any solitary leakage-form of inability, in just about any most other brakes, off a part built to incorporate compressed air or braking system liquid (similar to the parenthetical words specified within the six.3.1).