(a) To have a trailer designed to pull several other vehicle equipped with heavens brakes, pressure differential between the handle line input coupling and you may a good 50-cubic-inches decide to try reservoir attached to the control line returns coupling will perhaps not meet or exceed the costs specified into the 3.5(a) (1), (2), and (3) in standards given when you look at the step 3.5(b) (1) compliment of (4):
S5
(1) 1 psi whatsoever enter in pressures comparable to otherwise more than 5 psi, however more than 20 psi;
(2) dos psi anyway input pressures equal to otherwise more than 20 psi although not greater than 40 psi; and you may
(2) Whenever heavens is used on or create from the control line enter in coupling making use of the truck test rig shown from inside the Profile step 1;
To possess reason for the requirements of 4
(3) Having a fixed orifice composed of good 0.0180 inches diameter opening (no. 77 exercise part) in a beneficial 0.032 inch-thick disc hung from the manage range between the trailer take to rig coupling plus the car’s control range type in coupling; and you can
(4) Functioning the fresh trailer decide to try rig in the same way and you will significantly less than an equivalent requirements since it is run during research determine brake actuation and you can launch moments, as the given inside the step three.step 3 and 3.cuatro, with the exception of installing the fresh new starting on the handle line to help you restriction ventilation rate.