Brand new trailer test rig shown inside the Figure 1 try calibrated during the conformity towards calibration shape shown in the Contour step three

Brand new trailer test rig shown inside the Figure 1 try calibrated during the conformity towards calibration shape shown in the Contour step three

step one.ten.dos The center of the law of gravity peak of the ballast into stacked control trailer shall be less than 24 ins above the the top of tractor’s 5th controls.

step one.ten.step 3 The handle truck possess one axle having an excellent GAWR of 18,100000 weight and a length, mentioned regarding transverse centerline of one’s axle into centerline of your own kingpin, regarding 258 ±6 ins.

1.ten.cuatro Brand new handle trailer are loaded to make sure that their axle is stacked at 4,five hundred lbs plus the tractor are loaded so you can its GVWR, loaded over the kingpin just, on the tractor’s fifth wheel adjusted therefore, the stream toward for every axle counted from the tire-soil software is actually extremely almost proportional with the axles’ respective GAWRs, instead of surpassing the newest GAWR of the tractor’s axle otherwise axles otherwise handle trailer’s axle.

1.eleven Unique push standards. A vehicle equipped with an interlacing axle program otherwise a top wheel push system that is involved and you may disengaged because of the rider is actually checked out towards program disengaged.

step one.several Liftable axles. An automible with a liftable shaft is actually checked-out from the GVWR having brand new liftable shaft off and also at unloaded car lbs towards liftable shaft upwards.

Into standards of S5.step three.step three.step one and you will S5.step 3.cuatro.step one, the pressure on trailer try rig tank is initial set at the one hundred psi to possess actuation assessment and you may 95 psi to possess discharge evaluation.

step one.14 Into the assessment the latest crisis braking system regarding pulling car less than S5.7.3(a), the latest hose(s) is ventilated towards the ambiance any time not less than 1 2nd and never more than 1 minute up until the crisis end initiate, as the vehicles is moving during the speed where the fresh new prevent is to be generated and you can any manual handle for the pulling auto safeguards system is throughout the standing to provide sky and you will brake manage signals on the automobile getting towed. No brake application is created from the time the range(s) is ventilated before the emergency stop starts with no instructions procedure of one’s vehicle parking brakes otherwise pulling automobile protection system happens from the time the line(s) is actually ventilated until the stop is done.

step one.fifteen First braking system temperatures. Except if if not specified, the original brake climate is no less than 150 °F and never over 2 hundred °F.


The latest braking system climate is measured of the plug-sorts of thermocouples strung on the calculate center of your own up against length and depth of the most extremely greatly stacked footwear otherwise disk pad, that for every brake, since the found for the Profile 2. Next thermocouple are going to be hung on a level out of .080 inches and you will located contained in this step 1 inches circumferentially of your thermocouple hung on .040 inch breadth. For cardiovascular system grooved footwear otherwise pads, thermocouples is actually installed within one-eighth regarding an inch to at least one-one-fourth out-of an inches of groove and also as close to the heart that one may.

An additional thermocouple may be strung at the beginning of the latest attempt series in case the liner wear is anticipated to arrive a good section inducing the first thermocouple to contact brand new friction surface from an instrument otherwise rotor

step 1.17 Set of conformity choices. In which name brand options are specified, the maker should get the solution by the point they certifies the vehicle and may not after that discover an alternative for the car. Each brand will, on consult throughout the National Street Customers Coverage Administration , bring information about and therefore of your own compliance selection it’s chose to own a particular auto otherwise make/design.

dos.1 Brand new dynamometer inertia for each controls matches this new load to your wheel to your shaft piled in order to their GAWR. For an automible that have a lot more GAWRs given for process at reduced rate, the fresh new GAWR put would be the fact given to own a performance off fifty miles per hour, otherwise, at the accessibility to the producer, one speed more than fifty miles per hour.

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