Plus appointment the other criteria out-of S5

eight.2 Crisis brakes procedure. The fresh disaster brake system is going to be used and released, and become capable of modulation, in the form of the service braking system control.


(a) In the example of a trailer-tractor on the unloaded status and you will just one device truck which can perform towing an enthusiastic airbrake equipped auto that will be piled to GVWR, have the capacity to fulfilling the needs of seven.step 1 because of the operation of the solution braking system manage merely, into the truck heavens have line and you can heavens handle range out of this new pulling car vented into the ambiance relative to S6.step 1.14;

(b) Are able to modulating air throughout the have or control line to your truck in the form of this service membership braking system control having a single incapacity throughout the pulling car solution brakes since the specified into the 7.1.

8.step 1 Crisis stopping capability. Each truck except that a truck converter dolly shall keeps good vehicle parking brakes that adapts so you’re able to six and this applies which have this new push given inside the 6.step one or six.dos in the event the air pressure in the likewise have line is at atmospheric stress.

(a) A parking brakes that conforms so you’re able to six which enforce to the push specified in 6.1 otherwise six.dos if the heavens pressure regarding supply line is at atmospheric tension, or

(b) A crisis program one instantly can be applied this service membership brakes when the service reservoir was at any pressure significantly more than 20 lb/in 2 plus the have line was at atmospheric tension. Yet not, one agricultural product trailer, hefty hauler trailer, otherwise pulpwood truck should qualify of 8.step one otherwise, from the option of the maker, the requirements of ยง of term.

A truck converter dolly will possess, during the maker’s alternative –

8.2 Also have range stress storage. Any single leakage sort of incapacity regarding the solution brake system (apart from faltering of the likewise have line, a valve yourself attached to the also have line or a feature regarding a braking system chamber casing) shall maybe not result in the pressure in the also have line shedding less than 70 psi, counted on forward trailer supply coupling. A trailer will meet up with the a lot more than likewise have line tension preservation requirements using its brakes linked to the truck test rig found within the Figure step 1, with the reservoirs of one’s trailer and you will test rig initial pressurized in order to 100 psi additionally the regulator of one’s trailer shot rig put during the 100 psi; apart from a truck equipped with an air-applied, mechanically-stored parking brake system rather than built to tow an auto armed with sky brake system, on manufacturer’s alternative, may qualify out of 8.4 in the place of those of 8.2 and 8.3.

8.3 Automated application of parking brake system. Having a first reservoir program stress out-of one hundred psi and you may first have line stress away from one hundred psi, and in case designed to pull an automobile equipped with sky brakes, which have a 50 cubic inches attempt tank attached to the bottom have range coupling, along with any next unmarried leaks particular failure in every most other brakes, from a part made to include compressed air otherwise brake fluid (similar to the parenthetical terminology specified inside 6.step three.1), after air stress on also provide line try 70 psi or more, the fresh vehicle parking brakes shall not provide one brake retardation because an effective results of over or partial automatic application of the latest parking brakes.

8.4 Automated applying of heavens-applied, mechanically stored vehicle parking brakes. Using its brake system connected to the supply range portion of the latest truck attempt rig (Shape step one) in addition to regulator of one’s trailer sample rig place within 100 psi, with one unmarried leakage type of incapacity in the provider brake program (with the exception of failing of one’s have range, a device in person linked to the likewise have range otherwise an element out-of a brake chamber, but together with incapacity of any well-known diaphragm), this new parking brake system will perhaps not render people braking system retardation as a consequence of over or limited automatic applying of the brand new vehicle parking brake system.

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