(b) During the option of the company, to have automobile armed with braking system possibilities hence utilize a familiar diaphragm, the newest efficiency standards given during the six(a) and that need to be met with people unmarried leakage-method of inability in the a familiar diaphragm could possibly get instead feel exposed to the amount of leakage-variety of incapacity calculated in the six.eight. 6(a) which use with single leakage-particular downfalls apart from problems in a familiar diaphragm.
(c) At the accessibility to the manufacturer, the fresh new truck percentage of one agricultural product truck, heavy hauler trailer, or pulpwood trailer could possibly get meet the requirements out-of § associated with identity rather than the requirements regarding 6(a).
(a) In the example of an auto besides a trailer-tractor which is armed with over a couple of axles, such that brand new quotient static retardation push/GAWR is not less than 0.twenty-eight when it comes down to shaft except that a good steerable front axle; and you can
(b) Regarding a trailer-tractor that’s armed with over a couple axles, such that this new quotient static retardation push/GVWR isn’t below 0.14.
six.2 Values carrying. With all of vehicle parking brake system applied, the car shall remain stationary up against constant and you may against down hill to your a flaccid, dry portland cement concrete roadway having an effective 20-per cent degrees, both
6.3.step one The fresh new parking brakes should be able to reaching the minimal performance given either in six.step 1 or six.2 that have one unmarried leakages-sorts of failure, in just about any almost every other brake system, regarding a part built to include compressed-air or brake liquid (excluding incapacity regarding some a brake chamber construction however, and additionally inability of any braking system chamber diaphragm that is section of any other brake system as well as a great diaphragm which is popular to the fresh new vehicle parking brake system and just about every other brakes), in the event the pressures on car’s vehicle parking brake chambers is at the degree computed within the 6.step 3.4.
With all most other brake system produced inoperative, throughout the a fixed drawbar present an onward otherwise rearward recommendations, new static retardation force created by employing this new parking brake system will likely be:
6.3.2 A technical setting is going to be provided that, once a parking brake software is fashioned with brand new challenges in the brand new car’s parking brake spaces on levels determined for the six.step three.cuatro, and all sky and you will liquid pressures in the automobile’s braking solutions is actually up coming bled right down to no, and you can without using energy, keeps the fresh new vehicle parking braking system application with enough parking retardation push to meet up with the minimum performance specified inside the 6.step three.step 1 plus in often 6.step 1 otherwise six.2.
six.3.3 To own autos and you can vehicles, with a primary reservoir program tension out-of a hundred psi and, if the built to pull an automible armed with sky brake system, having an effective fifty cubic inches test tank connected to the supply range coupling, zero afterwards than simply three mere seconds ever since off actuation out of the newest parking brake control, the brand new technical mode regarded inside the six.3.2 are actuated. To have trailers, into likewise have line initially pressurized so you can 100 psi making use of the likewise have line part of the truck sample rig (Contour step one) and you may, if the designed to pull a car equipped with heavens brakes, with an excellent 50 cubic inch take to reservoir connected to the rear also have line coupling, zero afterwards than three moments since that time venting for the ambiance of your own front side supply range coupling is set up, new technical mode referred to when you look at the 6.step three.dos shall be actuated. Which requirement is met getting automobiles, busses and you will ilove trailers both which have and you may without the single leakages-particular failure, in any almost every other brake system, from a member designed to include compressed-air or brake liquid (consistent with the parenthetical words given in the six.3.1).