(a) To have a trailer built to tow other auto armed with sky brake system, pressure differential within manage range type in coupling and you can a great 50-cubic-inch sample reservoir connected to the manage line productivity coupling will maybe not meet or exceed the values specified from inside the 3.5(a) (1), (2), and you can (3) within the standards specified during the step three.5(b) (1) because of (4):

(1) step 1 psi after all type in challenges equal to or greater than 5 psi, however higher than 20 psi;

(2) dos psi at all type in demands equal to otherwise higher than 20 psi although not higher than forty psi; and you will

(2) When air try put on or released in the control line input coupling utilizing the trailer shot rig found within the Contour step one;

(3) That have a fixed opening consisting of a beneficial 0.0180 inches diameter opening (zero. 77 exercise part) in the good 0.032 inch-thick disc strung throughout the manage line between your truck attempt rig coupling additionally the automobile’s manage range type in coupling; and you can

(4) Functioning brand new truck shot rig in the same way and you may under an identical criteria as it’s operate throughout the comparison to measure braking system actuation and release moments, once the specified for the step 3.step three and you may 3.4, with the exception of the installation of the fresh starting about control range in order to restriction ventilation price.

S5

step three.six Balances and you will handle throughout the braking – trucks and busses. 3.6.1 and step 3.six.dos, per vehicle tractor will visit the very least 3 times for hot or not Seznamka the 12-ft way, with no an element of the vehicles making the brand new path. step 3.6.step one and you will 3.six.2, for each bus and you may vehicle (besides a trailer tractor) manufactured into the or shortly after , each coach and you can truck (besides a trailer tractor) built in two or more stages on the or immediately following , will stop at least 3 times in 12-foot lane, without the an element of the auto leaving the latest road.

3.six.step 1 Having fun with the full-treadle brake app during the course of brand new end, prevent the car regarding 30 miles per hour or 75 percent of your own restrict drive-courtesy price, any sort of was quicker, into the a 500-legs radius rounded road that have a wet height surface having a beneficial level rubbing coefficient off 0.5 whenever measured to the a much or curved part of the curved path having fun with a keen ASTM E1136-93 (Reapproved 2003) (provided from the reference, come across § 571.5) basic reference tire, prior to ASTM E1337-ninety (Reapproved 2008) (included by reference, look for § 571.5), within a speed out-of 40 miles per hour, having water beginning.

(b) At the unloaded lbs in addition to as much as 500 lbs (plus driver and instrumentation), or during the maker’s option, at their unloaded pounds including as much as 500 lbs (also driver and instrumentation) and you will and additionally not more than a supplementary one thousand pounds having an effective roll bar framework toward vehicle, to have a trailer, coach, or vehicle tractor.

cuatro Services brake system – dynamometer evaluating. When tested in place of previous road testing, under the standards of S6.2, per brake assembly should meet the requirements away from 4.step 1, 4.2, and you will cuatro.step three whenever checked-out within the succession and you may versus modifications except that men and women specified in the standard. Having reason for the needs of cuatro.2 and cuatro.3, the typical deceleration speed ‘s the change in acceleration split up by the the latest deceleration time counted from the onset of deceleration.

Retardation push are going to be computed the following:

cuatro.step 1 Braking system retardation push. The whole retardation forces exerted by brakes on for each and every automobile made to getting towed of the several other auto armed with sky brakes would be in a manner that new quotient amount of new braking system retardation forces / sum of GAWR’s according to braking system chamber air pressure, and you can should possess beliefs for around those revealed for the Line step 1 away from Desk III.