At the time, build a production actuation of vehicle parking braking system handle, and find out whether the mechanized form labeled within the S5
S5.six.6.5 The initial criteria getting S5.6.six.cuatro are listed below: The latest reservoir program and provide line are pressurized to help you a hundred psi, utilising the also have range portion of the truck sample rig (Figure step 1). If for example the vehicle is designed to pull an auto armed with heavens brake system, a good fifty cubic inch test tank try attached to the butt have range coupling.
30 moments after the initiation of such ventilation, the supply range are repressurized on truck try rig (Contour 1)
S5.six.6.six The test series to own S5.six.6.cuatro is just as follows. Any solitary leakage kind of inability, in every almost every other brake system, off a part designed to contain compressed air or braking system water (similar to the parenthetical keywords specified within the S5.6.step three.1), are delivered from the brake system. 30 moments following initiation of such repressurizing of the have range, the front supply range was ventilated with the environment. This procedure is conducted either by partnership and you can disconnection of likewise have line coupling otherwise by entry to a valve strung into the the production range portion of the truck sample rig near the also provide line coupling.
S5.six.7 Restrict level of prominent diaphragm leakage-kind of incapacity/ Comparable amount of leakages from the sky chamber which includes you to diaphragm. In the example of auto for which the choice during the S5.6(b) has been decided on, influence the most amount of common diaphragm leakages-particular incapacity (or comparable level of leakage throughout the heavens chamber which includes that diaphragm) according to the measures set forth when you look at the S5.six.7.step one using S22.214.171.124.3.
S126.96.36.199.step 1 According to pursuing the process, determine the brand new tolerance number of well-known diaphragm leaks-type of inability (or comparable quantity of leakage on air chamber that has had one to diaphragm) from which new vehicle’s vehicle parking brakes become unreleasable. Having a primary tank system tension of 100 psi, the newest engine turned off, no applying of some of the automobile’s brake system, and you will, in the event the automobile was created to tow an automobile armed with heavens brakes, a great fifty cubic inch try tank attached to the likewise have range coupling, expose a good leaks-type incapacity of one’s popular diaphragm (otherwise similar leakages on the sky chamber which includes you to diaphragm). Apply the new vehicle parking brake system by making a software actuation of one’s vehicle parking brake control. Slow down the demands in all of car’s reservoirs to help you no, turn on the newest engine and enable they to help you sluggish, and permit the fresh demands on the automobile’s reservoirs to rise up until it stabilize or up until the compressor shut-from area is actually attained. six.step 3.2 will still be actuated and hold the parking brake applications with enough vehicle parking retardation force to meet minimal overall performance given in a choice of S5.6.step 1 otherwise S5.6.dos. Repeat this process with increasingly decreasing otherwise expanding account (any applies) off leakage-particular diaphragm problems otherwise equivalent leakage, to find the minimum level of preferred diaphragm leakages-sorts of incapacity (or comparable number of leakage on air chamber which has one to diaphragm) of which all of the physical setting referred to in S5.six.step 3.dos continue to be actuated and support the vehicle parking braking system apps with plenty of vehicle parking retardation forces to generally meet minimal results given in a choice of S5.6.step one otherwise S5.6.2.
S5.6.7.step one.dos On amount of preferred diaphragm leakage-type of failure (otherwise equivalent number of leakages from the heavens chamber that has had you to definitely diaphragm) calculated for the S5.6.eight.1.step 1, and making use of the following processes, dictate this new tolerance limit reservoir rates (when you look at the psi per minute). With a primary reservoir program stress out-of 100 psi, the engine turned off, no application of some of the car’s brakes and you can, if the auto was created to pull a vehicle equipped with sky brake system, good fifty cubic inches take to tank connected to the also provide line coupling, apply actuation of vehicle parking braking system control. Determine the utmost tank leakage speed (in psi each and every minute), the limit rate out-of decrease in sky pressure from all vehicle’s reservoirs one show upcoming vehicle parking braking system app.