Use brand new parking brake system by making a credit card applicatoin actuation of one’s parking braking system handle
S5.6.six.5 The first standards for S5.six.6.cuatro are 
as follows: This new tank system and provide line was pressurized to a hundred psi, utilising the supply line part of the truck decide to try rig (Profile 1).
S5.6.6.six The exam succession to have S5.6.six.4 is really as follows. People unmarried leaks type failure, in any most other brake system, away from a member made to consist of compressed-air otherwise braking system fluid (consistent with the parenthetical phrase specified inside S5.six.step three.1), are lead in the brake system. 30 mere seconds pursuing the initiation of such ventilation, the production range was repressurized to your trailer take to rig (Figure 1). Thirty moments after the initiation of these repressurizing of your own supply line, leading have range are vented to the environment. This procedure is performed possibly of the connection and you can disconnection of likewise have line coupling otherwise by the entry to a valve hung within the the production line part of the truck decide to try rig nearby the supply range coupling.
S5.six.eight Maximum quantity of prominent diaphragm leakages-type of inability/ Comparable number of leaks throughout the air chamber that has had one to diaphragm. When it comes to vehicle for which the option within the S5.6(b) might have been opted, dictate maximum amount of preferred diaphragm leaks-style of inability (otherwise comparable quantity of leaks regarding the air chamber that contains you to definitely diaphragm) with respect to the steps established inside the S5.six.seven.1 by way of S5.6.7.2.3.
If for example the car was designed to pull a motor vehicle armed with heavens brake system, a great 50 cubic inch decide to try tank was attached to the bottom also provide range coupling
S5.6.seven.step one.step one With respect to the pursuing the procedure, influence the fresh new threshold amount of prominent diaphragm leakages-type failure (otherwise comparable level of leaks from the heavens chamber which has you to diaphragm) at which the brand new vehicle’s vehicle parking brake system getting unreleasable. Having an initial tank program stress from 100 psi, the new engine-turned out-of, no application of some of the automobile’s brake system, and you will, in case your automobile was designed to tow a car or truck equipped with sky brakes, a beneficial fifty cubic inch take to reservoir connected to the have range coupling, present an excellent leakage-type failure of your common diaphragm (or comparable leakages on heavens chamber that has you to diaphragm). Reduce the pressures in most of your own automobile’s reservoirs so you’re able to zero, stimulate the motor and permit it so you’re able to lazy, and allow the latest demands from the car’s reservoirs to rise until it balance or up until the compressor shut-away from point is actually reached. During the time, generate a release actuation of your own vehicle parking braking system control, and watch whether most of the mechanized form described within the S5.six.step 3.dos continue to be actuated and support the parking brake apps with plenty of parking retardation force to generally meet minimal abilities given in both S5.6.step one otherwise S5.6.2. Do that process with progressively coming down otherwise broadening profile (almost any applies) out-of leaks-types of diaphragm disappointments otherwise comparable leakages, to select the lowest level of well-known diaphragm leakage-style of inability (otherwise similar quantity of leakage from the air chamber which includes one diaphragm) of which all of the mechanized function described in S5.6.step 3.dos will still be actuated and you will hold the parking braking system applications with enough parking retardation pushes in order to meet minimal show given in either S5.six.step one or S5.six.dos.
S5.six.7.step 1.2 At the level of well-known diaphragm leaks-particular failure (otherwise comparable level of leakage about air chamber which has one to diaphragm) computed inside the S5.6.eight.step one.step 1, and ultizing another techniques, influence the new threshold restriction reservoir rate (when you look at the psi each minute). That have an initial tank program tension out of one hundred psi, the newest engine-turned of, no application of the automobile’s brakes and, if the automobile is made to tow a car armed with sky brakes, a 50 cubic inches attempt tank linked to the likewise have line coupling, make an application actuation of one’s vehicle parking brake control. Determine the utmost reservoir leaks price (in psi each and every minute), which is the restrict rates regarding reduced amount of sky stress of all automobile’s reservoirs you to definitely show then parking braking system application.