7.2 Disaster brakes process. The fresh emergency brake system is used and you can put out, and become with the capacity of modulation, by means of the service brake manage.
S5
(a) When it comes to a trailer-tractor regarding the unloaded standing and you can a single equipment vehicle which is capable of towing an airbrake furnished auto and that’s stacked so you can GVWR, have the capacity to meeting the requirements of seven.step one from the operation of your own service brake control merely, towards truck heavens also have range and you can heavens control range off new pulling auto vented to the ambiance in line with S6.step one.14;
(b) Have the capacity to modulating air in the have otherwise manage line to the trailer in the shape of the service braking system manage that have just one inability throughout the towing vehicle solution brakes because the specified in 7.step 1.
8.step 1 Disaster stopping features. For each and every truck except that a truck converter dolly shall has actually a great vehicle parking brakes one conforms so you’re able to 6 and this applies having this new push specified within the 6.step one otherwise six.dos if sky stress from the also provide range was at atmospheric tension.
(a) A vehicle parking brakes one to adapts to help you six hence can be applied to the force given when you look at the 6.1 otherwise 6.2 if air pressure on also have range is at atmospheric tension, or
(b) An urgent situation program one instantly can be applied this service membership brake system if provider reservoir is at people tension a lot more than 20 pound/in two as well as the also provide range is at atmospheric tension. However, any agricultural product truck, heavy hauler trailer, or pulpwood trailer should meet the requirements out of 8.step one or, in the accessibility to producer, the requirements of § of the term.
A truck converter dolly shall enjoys, within maker’s choice –
8.dos Supply range pressure preservation. People single leakages variety of inability on provider brakes (apart from failing of one’s also provide line, a valve directly linked to the also have range otherwise a component off a braking system chamber houses) will perhaps not improve tension throughout the also have range losing below 70 psi, measured from the forward truck likewise have coupling. A truck shall meet the significantly more than likewise have line tension preservation requisite with its brake system connected to the truck take to rig shown into the Profile 1, to the reservoirs of the trailer and you can attempt rig initial pressurized so you’re able to one hundred psi in addition to regulator of the trailer take to rig lay from 
the a hundred psi; other than a truck equipped with an air-used, mechanically-kept vehicle parking brakes and not built to pull an auto equipped with sky brake system, at manufacturer’s option, get meet the requirements of 8.cuatro unlike that from 8.dos and you can 8.step three.
8.step three Automated application of vehicle parking brake system. Which have an initial tank system tension away from 100 psi and you will initial also have line stress away from a hundred psi, and when built to pull an automible armed with air brake system, with a great fifty cubic inch take to reservoir attached to the butt also have range coupling, in accordance with people further single leaks sort of failure in almost any almost every other brake system, out of a member made to include compressed air otherwise brake water (similar to the parenthetical phrase given into the six.step three.1), after sky pressure from the also provide line was 70 psi or maybe more, the newest parking brake system will perhaps not bring people braking system retardation since the good results of done or limited automated application of the new parking brake system.
8.4 Automatic applying of air-applied, automatically stored vehicle parking brakes. Featuring its brakes linked to the likewise have range part of brand new truck attempt rig (Profile step 1) while the regulator of your trailer test rig lay in the 100 psi, and with one single leakage type inability in the service brake program (except for faltering of the also have line, a device truly connected to the have line otherwise a feature of a brake chamber, however, plus inability of any well-known diaphragm), the newest parking brake system should perhaps not render any braking system retardation since the a beneficial outcome of done or partial automatic application of new vehicle parking brakes.
