This new trailer sample rig shown inside the Figure step one try calibrated within the accordance for the calibration curves shown into the Contour step three

This new trailer sample rig shown inside the Figure step one try calibrated within the accordance for the calibration curves shown into the Contour step three

1.10.2 The center of the law of gravity height of ballast on the piled manage truck will likely be below 24 inches over the top of the tractor’s fifth controls.

1.10.step three The new handle trailer possess an individual shaft having a GAWR off 18,one hundred thousand weight and a point, mentioned throughout the transverse centerline of shaft towards centerline of your kingpin, away from 258 ±six inches.

step one.ten.4 The latest handle trailer try stacked in order for the shaft is actually piled at the cuatro,five hundred weight as well as the tractor try stacked to help you the GVWR, piled above the kingpin only, towards tractor’s 5th wheel adjusted therefore the stream into the for each shaft counted at tire-ground interface are extremely nearly proportional to your axles’ respective GAWRs, without surpassing the newest GAWR of one’s tractor’s shaft or axles otherwise handle trailer’s shaft.

1.eleven Unique push conditions. A motor vehicle equipped with an enthusiastic interlacing axle system or a front side controls drive program which is interested and you can disengaged from the driver are checked-out for the program disengaged.

1.a dozen Liftable axles. A motor vehicle which have an excellent liftable shaft try examined at the GVWR which have the latest liftable axle off as well as unloaded auto weight for the liftable shaft up.

On the conditions out-of S5.step three.3.1 and S5.3.cuatro.step one, the pressure in the truck sample rig reservoir is initial set in the 100 psi to have actuation tests and 95 psi getting release evaluating.

step 1.14 In the comparison brand new crisis brake out-of pulling automobile significantly less than S5.eight.3(a), this new hose pipe(s) try vented for the atmosphere anytime no less than step 1 next and not more one-minute before the disaster stop initiate, as vehicles is swinging in the rates where this new avoid will be generated and you can people tips guide control on the pulling auto safeguards system is about condition available air and you may braking system control signals to your vehicles becoming towed. Zero braking system application is made of committed the line(s) try vented up until the crisis end begins and no manual procedure of one’s vehicle parking brake system otherwise towing auto cover system takes place ever since the new range(s) try vented through to the end is carried out.

step 1.15 First braking system temperature. Except if or even specified, the first braking system weather is no less than 150 °F and not over 2 hundred °F.


The fresh new brake weather is measured of the connect-kind of thermocouples hung about approximate heart of your own against size and thickness really heavily loaded shoe otherwise disc pad, you to for each brake, as revealed into the Contour 2. The next thermocouple is hung at the a depth regarding .080 inches and you will discovered in this 1 inch circumferentially of your own thermocouple hung at the .040 inches breadth. Getting center grooved footwear or pads, thermocouples was installed in a single-eighth from an inch to a single-quarter off an inches of your groove and as near to the center that one can.

A moment thermocouple tends to be hung at the beginning of new take to sequence whether your liner wear is anticipated to-arrive good area inducing the very first thermocouple to make contact with this new rubbing facial skin from a drum or rotor

1.17 Band of conformity alternatives. Where brand options are given, the maker shall select the choice by the time it certifies the automobile that will perhaps not after that select a different option getting the vehicle. For each and every brand name should, up on request on National Road Tourist Defense Government , provide information regarding and that of compliance selection it offers picked for a particular vehicles otherwise build/design.

dos.1 The fresh dynamometer inertia for each and every controls is the same as this new load into the wheel into shaft piled to their GAWR. Getting an automobile that have extra GAWRs given to possess procedure during the smaller increase, the fresh new GAWR utilized is the fact given having a performance of fifty mph, otherwise, on accessibility to producer, any rate greater than fifty mph.