The latest election on the option doesn’t change the performance standards specified from inside the S5

(b) At accessibility to the manufacturer, to have car armed with brake assistance hence use a common diaphragm, brand new show standards specified within the 6(a) and that need to be exposed to one single leakage-particular failure from inside the a common diaphragm could possibly get instead getting confronted by the amount of leakages-style of incapacity determined during the six.7. 6(a) and this use with single leaks-particular disappointments aside from failures when you look at the a familiar diaphragm.

(c) From the accessibility to the producer, the fresh new truck part of any agricultural item trailer, hefty hauler truck, otherwise pulpwood trailer may be considered out of § associated with the title rather than the standards regarding six(a).

S5

6.step one Static retardation push. With almost every other brake system made inoperative, through the a fixed drawbar pull in a forward or rearward guidance, the fresh new fixed retardation force produced by the usage of the new parking brake system are:

(a) In the example of a car apart from a truck-tractor which is armed with more than a few axles, in a fashion that the latest quotient static retardation force/GAWR is not less than 0.twenty-eight for your axle aside from a great steerable front shaft; and you may

Which criteria is came across to own trucks, vehicles and you will trailers both which have and you may without having any unmarried leakages-variety of inability, in any almost every other brakes, from a member built to consist of compressed air or brake liquid (similar to the parenthetical words specified in the six

(b) When it comes to a trailer-tractor that’s equipped with over a couple axles, such that the latest quotient fixed retardation force/GVWR is not lower than 0.14.

6.2 Level carrying. With all vehicle parking brakes applied, the auto will will always be fixed against uphill and you will facing down hill towards a smooth, lifeless portland cement concrete path with a beneficial 20-per cent levels, both

six.step three.1 Brand new vehicle parking brake system is going to be able to achieving the minimum show given in both six.1 otherwise 6.dos which have people unmarried leaks-variety of incapacity, in every almost every other brake system, out of a part designed to have compressed air otherwise braking system fluid (excluding failure out-of an element of a brake chamber construction however, as well as failure of every braking system chamber diaphragm which is part of some other brake system along with an effective diaphragm that is popular to help you the latest vehicle parking brakes and every other brakes), in the event that pressures regarding car’s vehicle parking braking system compartments is at the degree computed within the 6.step 3.cuatro.

six.step 3.2 A mechanical mode is provided that, just after a vehicle parking brake software is fashioned with new demands when you look at the the new vehicle’s parking brake spaces in the membership determined when you look at the six.step 3.4, and all of sky and you will fluid challenges regarding car’s braking options are upcoming bled down to zero, and without needing electricity, retains the brand new vehicle parking braking system software with enough vehicle parking retardation force so you’re able to meet up with the minimum efficiency specified in 6.step 3.step 1 and in both 6.step one otherwise 6.dos.

six.step 3.step three To possess autos and you can busses, that have an initial tank system pressure out-of one hundred psi and, when the made to pull an auto equipped with heavens brake system, that have good 50 cubic inches take to tank attached to the likewise have range coupling, zero after than about three moments since of actuation regarding this new vehicle parking brake control, the latest technical function known when you look at the 6.3.2 are actuated. To possess trailers, with the have range first pressurized so you can a hundred psi helpful resources using the also provide range part of the truck try rig (Figure 1) and you will, if the made to tow an automible armed with air brakes, which have a great 50 cubic inch test reservoir linked to the bottom likewise have range coupling, zero later than simply about three moments from the time venting with the surroundings of the top likewise have range coupling is set up, brand new physical means labeled from inside the six.3.dos can be actuated. step three.1).