(b) On accessibility to the producer, having car armed with braking system options hence make use of a common diaphragm, new performance standards specified inside 6(a) and that must be confronted with one unmarried leakage-type of failure when you look at the a familiar diaphragm will get instead become met with the level of leakage-variety of failure determined during the 6.7. 6(a) and therefore apply with single leakage-sort of downfalls besides problems for the a common diaphragm.
(c) At accessibility to the manufacturer, the newest trailer part of one agricultural commodity trailer, heavier hauler truck, or pulpwood trailer can get meet the requirements from § of this name as opposed to the conditions from 6(a).
six.1 Fixed retardation force. With all of almost every other brake system produced inoperative, during a fixed drawbar generate an onward or rearward guidance, the newest static retardation push developed by using the new parking brake system are going to be:
(a) When it comes to a motor vehicle besides a trailer-tractor that is armed with over several axles, in a fashion that the fresh new quotient fixed retardation force/GAWR isn’t below 0.twenty eight for your shaft apart from a steerable front side shaft; and
Along with vehicle parking brakes used, the auto shall continue to be fixed up against uphill and you can facing downhill into a softer, deceased portland concrete tangible highway having an effective 20-percent degrees, both
(b) In the example of a truck-tractor that is armed with more than a few axles, such that the quotient fixed retardation push/GVWR is not less than 0.fourteen.
six.step 3.step 1 This new vehicle parking brakes should be capable of attaining the lowest results given in a choice of six.step 1 or six.dos that have people unmarried leaks-type failure, in any most other brake system, from a member built to incorporate compressed-air or brake fluid (excluding incapacity away from a component of a brake chamber property but as well as incapacity of every brake chamber diaphragm which is section of virtually any brake system and additionally good diaphragm which is well-known to this new vehicle parking brakes and every other brake system), if challenges throughout the car’s parking braking system spaces has reached the levels computed for the six.step 3.cuatro.
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six.step three.2 A technical form can be so long as, shortly after a parking braking system software is made out of the new demands into the this new vehicle’s parking braking system compartments from the profile computed when you look at the 6.step 3.4, as well as air and you can liquid pressures regarding vehicle’s stopping expertise are following bled down seriously to zero, and without the need for electrical energy, holds the new vehicle parking braking system app with enough vehicle parking retardation force to meet with the lowest abilities specified in six.step 3.step one and also in sometimes six.step 1 otherwise six.dos.
6.step three.3 Getting cars and you may vehicles, which have additional reading an initial reservoir program pressure away from 100 psi and you may, in the event that designed to pull a car or truck armed with air brake system, with a good 50 cubic inch test reservoir connected to the supply line coupling, zero later on than around three moments ever since off actuation from new vehicle parking brake manage, the new mechanized mode labeled in the 6.3.2 can be actuated. Getting trailers, to your also provide range initially pressurized so you’re able to one hundred psi using the also provide range portion of the trailer try rig (Profile step one) and you will, in the event that designed to pull an auto equipped with sky brakes, that have good 50 cubic inch shot reservoir connected to the butt likewise have line coupling, no afterwards than around three mere seconds since that time venting towards atmosphere of the side also provide range coupling is initiated, the latest physical setting referred to within the six.step 3.dos would be actuated. This requirements would be met to own automobiles, buses and you can trailers one another with and you will without the unmarried leakages-kind of inability, in almost any almost every other brakes, away from an associate designed to consist of compressed-air otherwise braking system liquid (similar to the parenthetical words given for the six.step three.1).
