six.eight.2.step 1 According to following the techniques, determine the fresh endurance number of well-known diaphragm leakages-form of failure (or comparable number of leaks regarding air chamber with one diaphragm) of which the new vehicle’s vehicle parking brakes feel unreleasable. Having a primary tank program and gives range stress of one hundred psi, zero applying of all car’s brake system, and you may, whether your car is made to pull an auto equipped with heavens brakes, a good fifty cubic inch shot reservoir connected to the also have line coupling, establish a great leakages-style of incapacity of your preferred diaphragm (or similar leakages about air chamber which has you to diaphragm). Pressurize the production range from the linking new trailer’s front side also have range coupling towards the also provide line portion of the trailer test rig (Profile 1) towards regulator of one’s trailer test rig put at one hundred psi, to see if or not every physical mode referred to in six.3.dos will always be actuated and you may contain the vehicle parking brake applications with enough parking retardation forces to satisfy the minimum efficiency specified in a choice of 6.1 otherwise 6.2. Repeat this processes having increasingly coming down or broadening levels (any type of can be applied) regarding leakage-variety of diaphragm disappointments or similar leakage, to select the lowest level of preferred diaphragm leakages-form of incapacity (or comparable quantity of leakage from the sky chamber containing one to diaphragm) where every mechanized setting referred to in six.3.dos are nevertheless actuated and hold the vehicle parking braking system programs with plenty of parking retardation pushes to get to know minimal results given either in 6.step one or six.dos.
Make a parking braking system app by venting leading supply range coupling with the environment, and relieve the new pressures in most of your automobile’s reservoirs so you can zero
six.7.dos.dos In the level of common diaphragm leakages-style of incapacity (otherwise equivalent amount of leaks regarding heavens chamber which has had that diaphragm) determined during the 6.eight.2.step 1, and utilizing next techniques, influence the fresh endurance maximum reservoir leakage rate (when you look at the psi a minute). That have a first reservoir program and provide range stress out of one hundred psi, zero application of any of the vehicle’s brake system and you will, in case your car was created to tow a car or truck equipped with sky brake system, good 50 cubic inches test tank connected to the buttocks also provide range coupling, create a vehicle parking brake software by ventilation the front supply line coupling with the conditions. Influence the most tank leaks rates (within the psi each and every minute), which is the limit speed from reduction of sky stress regarding any of the automobile’s reservoirs you to definitely results after that vehicle parking braking system application.
6.eight.2.3 Utilizing the following procedure, a leakage-form of inability of your own common diaphragm (or comparable leakages throughout the heavens chamber that has you to definitely diaphragm) that contributes to a max reservoir leaks speed that is around three times the threshold limit reservoir leakages price calculated from inside the 6.seven.2.2. Which have a primary tank program and supply line pressure off 100 psi, zero application of all car’s brake system and you can, when your vehicle is made to pull an automible armed with sky brake system, a fifty cubic inch shot tank linked to the buttocks also provide line coupling, make a vehicle parking braking system app by venting the leading likewise have range coupling toward atmosphere. Dictate the maximum reservoir leaks rate (inside psi a minute), which is the maximum rates regarding reduced amount of Irving escort sky tension from all vehicle’s reservoirs one overall performance up coming parking brake app. The amount of preferred diaphragm leakages-form of incapacity (or equivalent amount of leaks from the sky chamber that features you to definitely diaphragm) in the that it tank leaks rate is the peak that’s to be used under the alternative established during the 6(b).
seven Disaster brakes to have autos and you may buses. step one, adjusts for the criteria out of seven.1 because of 7.step 3. Although not, this new vehicle percentage of a vehicle transporter does not have to meet up with the drive standards out-of eight.step 1 and you will 7.step three.