S5

6.seven.dos.step one According to pursuing the process, influence brand new threshold number of common diaphragm leakages-sorts of incapacity (otherwise equivalent quantity of leakage regarding the air chamber that has had one diaphragm) where the new car’s vehicle parking brake system be unreleasable. Having an initial tank program and offer line stress from one hundred psi, no application of the car’s brakes, and, in case your auto was created to pull an auto armed with heavens brakes, a great fifty cubic inch sample reservoir linked to the also provide range coupling, present a great leakages-method of failure of preferred diaphragm (otherwise similar leaks on heavens chamber with which has one to diaphragm). Pressurize the production range of the linking the brand new trailer’s front side likewise have range coupling towards have line portion of the trailer shot rig (Contour 1) to your regulator of one’s truck test rig set in the 100 psi, and find out whether or not the technical means referred to within the six.step 3.dos are actuated and you can support the vehicle parking brake programs with sufficient parking retardation pushes meet up with minimal results specified in both six.1 otherwise six.dos. Try this procedure with more and more coming down otherwise broadening membership (any type of is applicable) regarding leakage-kind of diaphragm failures or similar leakage, to find the minimum amount of preferred diaphragm leaks-type of failure (otherwise similar number of leakages on the heavens chamber which has one diaphragm) at which the technical means known during the 6.step 3.dos will always be actuated and you can secure the vehicle parking brake software with sufficient parking retardation forces to meet up with the minimum efficiency given in a choice of 6.step 1 or 6.2.

Create a vehicle parking braking system software because of the venting the front have range coupling to the ambiance, and relieve the new pressures in every of your own car’s reservoirs to no

6.7.dos.2 From the amount of preferred diaphragm leakage-sort of incapacity (or equivalent amount of leaks regarding the air chamber who has you to definitely diaphragm) determined inside 6.seven.dos.1, and using the following procedure, determine the new tolerance maximum reservoir leakages rate (in the psi each and every minute). Having an initial reservoir program and gives range pressure regarding one hundred psi, no application of all vehicle’s brakes and you can, should your vehicle was designed to pull an automible armed with sky brakes, a good 50 cubic inch attempt reservoir linked to the buttocks supply line coupling, create a vehicle parking braking system app by the ventilation leading likewise have range coupling with the surroundings. Influence the maximum tank leakages speed (within the psi each and every minute), the maximum rates from decrease in air pressure out of all vehicle’s reservoirs one to results after that parking brake software.

six.eight.dos.step 3 Using the pursuing the procedure, a great leaks-style of failure of the prominent diaphragm (or similar leakage about heavens chamber with you to diaphragm) that leads to a max reservoir leaks rate which is about three minutes brand new threshold restrict tank leaks rate calculated for the 6.7.dos.2. That have a primary tank system and provide line pressure out of one hundred psi, zero application of some of the car’s brakes and you may, in case your car was designed to tow a motor vehicle armed with sky brakes, an effective 50 cubic inches decide to try tank connected to the butt supply line coupling, make a parking braking system app by ventilation leading also have range coupling for the conditions. Dictate the most tank leaks rate (during the psi a minute), which is the limitation rates away from reduced amount of sky stress out of the vehicle’s reservoirs you to definitely show upcoming parking braking system application. The level of prominent diaphragm leaks-style of failure (or comparable quantity of leakages about sky chamber that has one to diaphragm) for the which tank leakage rates ‘s the top which is for use according to the choice established for the 6(b).

seven Disaster brakes to possess automobiles and you may vehicles. step one, adjusts on conditions from seven.step 1 as a consequence of eight.step three. However, the fresh new vehicle part of an automible transporter shouldn’t have to meet the road test criteria out of 7.step 1 and you can 7.3.