(a) To possess a truck built to tow some other car equipped with sky brake system, pressure differential between your control range type in coupling and you may a beneficial 50-cubic-inch test reservoir attached to the control range output coupling will not meet or exceed the values specified for the step 3.5(a) (1), (2), and you will (3) within the criteria specified for the 3.5(b) (1) by way of (4):
(1) step one psi at all type in challenges equal to or greater than 5 psi, although not greater than 20 psi;
(2) 2 psi at all input demands comparable to or greater than 20 psi not greater than 40 psi; and you will
(2) When sky is put on otherwise create regarding the manage range type in coupling making use of the truck decide to try rig found from inside the Profile 1;
(3) With a predetermined orifice consisting of a great 0.0180 inches diameter hole (zero. 77 drill piece) within the a beneficial 0.032 inch thick disc installed in the control range between your truck test rig coupling together with automobile’s handle line type in coupling; and you may
(4) Working the fresh trailer sample rig in the sense and below an identical criteria because it’s operate during the evaluation to measure braking system actuation and discharge moments, while the specified within the 3.step three and you will step 3.cuatro, except for the installation of the latest opening on manage range to maximum airflow speed.
step three.six Balances and handle throughout braking – cars and you may buses. 3.six.step 1 and you can step three.six.dos, per truck tractor should take a look at least 3 times during the 12-legs way, without having any part of the auto making brand new path. step three.six.1 and you will step 3.6.dos, each bus and you can vehicle (apart from a truck tractor) are formulated towards otherwise after , and each bus and truck (apart from a trailer tractor) produced in several grade towards the or immediately following , shall take a look at the very least three times for the a dozen-ft lane, with no area of the car leaving the latest street.
3.6.step 1 Having fun with a full-treadle brake software during the course of the new end, prevent the automobile regarding 31 miles per hour otherwise 75 per cent of one’s maximum drive-courtesy rate, whatever try smaller, with the a four hundred-foot distance curved road which have a wet height surface having a good level rubbing coefficient out-of 0.5 whenever measured toward a straight otherwise curved part of the rounded highway playing with an ASTM E1136-93 (Reapproved 2003) (integrated from the reference, pick § 571.5) standard site tire, according to ASTM E1337-90 (Reapproved 2008) (incorporated by the resource, find § 571.5), during the a rate out-of forty miles per hour, which have liquid delivery.
(b) On their unloaded pounds as well as around 500 pounds (plus rider and you can instrumentation), otherwise at the maker’s solution, in the the unloaded weight together with to five hundred weight (together with rider and instrumentation) and you may along with not more than an additional 1000 pounds having a beneficial move club build to your auto, to possess a trailer, bus, or truck tractor.
4 Services brakes – dynamometer examination. When looked at in the place of earlier in the day road testing, underneath the standards off S6.dos, for each and every brake construction shall qualify from 4.1, cuatro.2, and cuatro.step 3 whenever checked-out in succession and you will versus improvements other than people specified regarding the standard. Burada bu yazД±yД± oku Having reason for the needs of 4.2 and you will cuatro.step 3, an average deceleration rates ‘s the improvement in acceleration split up of the the latest deceleration go out measured throughout the start of deceleration.
Retardation force might be computed as follows:
cuatro.step 1 Braking system retardation force. The sum total retardation pushes exerted by brakes towards the for every single vehicle made to become towed by various other car equipped with air brakes shall be such that new quotient amount of the latest braking system retardation pushes / amount of GAWR’s prior to brake chamber air stress, and you will should have opinions no less than the individuals shown during the Line 1 out of Dining table III.