six.eight.dos.1 According to adopting the process, influence the latest threshold quantity of well-known diaphragm leakages-sorts of incapacity (or comparable level of leaks on the heavens chamber that has had you to definitely diaphragm) of which the new car’s vehicle parking brake system be unreleasable. That have a primary tank system and offer line stress regarding 100 psi, zero application of all vehicle’s brakes, and you may, if for example the auto was designed to tow a motor vehicle armed with heavens brake system, a good 50 cubic inch take to reservoir attached to the supply range coupling, introduce a great leakages-sort of incapacity of your popular diaphragm (otherwise comparable leakage regarding air chamber with which has that diaphragm). Pressurize the supply range from the linking the trailer’s top also provide range coupling on the supply range portion of the truck take to rig (Figure step one) to the regulator of one’s trailer try rig set at a hundred psi, Chicago free dating site and see if most of the physical function regarded inside six.3.2 are still actuated and you will secure the parking braking system software with enough parking retardation forces to meet minimal abilities given in both 6.1 otherwise 6.dos. Do this techniques that have progressively decreasing otherwise expanding account (any type of applies) out-of leakages-sort of diaphragm disappointments or equivalent leakage, to choose the lowest level of well-known diaphragm leaks-method of failure (otherwise equivalent amount of leakage regarding the sky chamber who has that diaphragm) from which all of the technical function referred to from inside the six.3.dos are actuated and hold the vehicle parking brake applications with enough vehicle parking retardation forces in order to satisfy minimal show given either in 6.1 otherwise six.dos.
Make a vehicle parking braking system app by venting leading also have range coupling into surroundings, and reduce the newest pressures in all of your own car’s reservoirs so you’re able to zero
six.7.dos.2 Within number of preferred diaphragm leakages-type of failure (otherwise equivalent level of leaks on heavens chamber with which has you to diaphragm) computed during the 6.seven.dos.step 1, and using the second processes, determine brand new threshold limit tank leakages speed (inside the psi for each minute). That have a primary tank system and supply line pressure regarding one hundred psi, zero application of some of the vehicle’s brakes and you will, in the event your auto is made to tow an automobile armed with air brakes, a beneficial 50 cubic inch take to reservoir connected to the butt supply range coupling, generate a parking brake software from the venting the leading also have line coupling into the atmosphere. Dictate the utmost reservoir leaks price (during the psi each and every minute), the limitation rates out of decrease in heavens stress regarding some of the automobile’s reservoirs you to definitely overall performance up coming parking brake application.
six.7.2.step three Using the adopting the process, a great leakages-sorts of failure of one’s common diaphragm (otherwise equivalent leakage about heavens chamber with one to diaphragm) you to definitely results in a max tank leakage price which is around three minutes the new threshold maximum reservoir leaks rates determined for the six.7.2.dos. That have a first tank program and offer range tension out of a hundred psi, zero applying of all vehicle’s brakes and you can, if for example the car is designed to pull a car equipped with sky brake system, a beneficial 50 cubic inch try reservoir connected to the butt also have line coupling, generate a parking brake application of the venting the front also have range coupling into the atmosphere. Determine maximum reservoir leakage price (in the psi a minute), which is the restriction speed off reduced amount of air stress regarding any of the car’s reservoirs one to show upcoming vehicle parking brake software. The level of common diaphragm leaks-variety of incapacity (otherwise equivalent level of leakage in the sky chamber which includes you to diaphragm) from the so it reservoir leaks rates ‘s the peak that’s for use within the option established in the 6(b).
seven Crisis brake system to own vehicles and you can buses. 1, adapts into the requirements regarding 7.1 as a consequence of seven.step three. However, the fresh vehicle part of a motor vehicle transporter does not have to meet the road test requirements out of 7.step 1 and seven.3.