(b) At option of the producer, to own automobile armed with brake possibilities hence make use of a familiar diaphragm, brand new efficiency criteria given within the 6(a) and therefore have to be confronted with people unmarried leakage-types of incapacity for the a common diaphragm may as an alternative feel met with the degree of leakage-method of inability determined when you look at the six.eight. 6(a) and therefore apply having solitary leakage-type downfalls aside from disappointments inside a familiar diaphragm.
(c) During the option of the producer, new truck portion of any agricultural product trailer, hefty hauler trailer, otherwise pulpwood truck get meet the requirements off § associated with the name rather than the criteria of six(a).
6.step 1 Static retardation push. With all of most other brake system generated inoperative, during the a fixed drawbar make a forward or rearward direction, this new static retardation push created by the aid of the vehicle parking brake system would be:
(a) Regarding an automible except that a truck-tractor that’s equipped with more than several axles, in a way that the brand new quotient fixed retardation push/GAWR is not below 0.28 for shaft aside from an excellent steerable top shaft; and
Along with vehicle parking brakes used, the car shall remain stationary facing constant and you can up against down hill toward a soft, lifeless portland cement concrete street with good 20-% degrees, both
(b) In the example of a trailer-tractor that is equipped with over a couple axles, in a fashion that the fresh quotient static retardation force/GVWR isn’t lower than 0.fourteen.
6.step three.step one The latest vehicle parking brake system will be effective at achieving the minimum abilities specified in both 6.step 1 or six.dos which have any unmarried leakages-variety of incapacity, in just about any most other brakes, away from a part built to incorporate compressed air otherwise braking system fluid (leaving out inability out of a component of a braking system chamber housing however, along with inability of every brake chamber diaphragm which is part of another brakes along with a good diaphragm that’s preferred so you can the fresh vehicle parking brake system and just about every other brake system), if the challenges throughout the automobile’s vehicle parking brake chambers has reached the amount calculated within the six.step three.4.
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6.step 3.2 A technical function are going to be so long as, just after a vehicle parking braking system software program is created using the fresh pressures in the new car’s parking brake compartments at profile determined for the 6.step 3.4, and all heavens and you will water demands regarding vehicle’s braking expertise are next bled right down to no, and you can without the need for power, holds the brand new vehicle parking braking system application with plenty of vehicle parking retardation push so you’re able to meet the minimum show given from inside the 6.step 3.1 and also in both six.step one otherwise 6.2.
six.3.3 To possess cars and buses, which have a primary tank system stress regarding 100 psi and you will, if the built to tow a car equipped with heavens brake system, with a beneficial 50 cubic inches sample tank attached to the supply line coupling, no after than about three mere seconds ever since macedonian dating site from actuation off brand new vehicle parking braking system manage, the brand new technical means known for the 6.step three.dos is going to be actuated. To own trailers, on the also provide line first pressurized so you’re able to a hundred psi with the also provide line part of the trailer sample rig (Contour step one) and, in the event the built to pull a motor vehicle equipped with sky brakes, with a fifty cubic inch shot tank linked to the bottom also have range coupling, zero after than around three mere seconds from the time venting to your environment of the front also have line coupling is set up, new physical setting known in six.step three.dos shall be actuated. This requisite would be came across to possess cars, vehicles and you will trailers each other with and you will without the solitary leakage-type failure, in any almost every other brakes, away from an associate designed to have compressed air otherwise braking system liquid (consistent with the parenthetical keywords given during the 6.step three.1).