S6.2.cuatro The temperature of each and every brake try mentioned by one plug-method of thermocouple installed in the center of the liner epidermis regarding the quintessential greatly piled shoe otherwise pad due to the fact revealed into the Figure 2.
S6.dos.5 The interest rate out-of braking system instrument or disk rotation for the a dynamometer comparable to the speed out-of rotation towards an automobile from the confirmed rates are computed by while a good tire distance equivalent with the static loaded radius specified by the tire manufacturer.
Active estimated luminous contact town means an element of the projection toward an airplane perpendicular with the light axis of this piece of your white-giving off facial skin that directs white on the photometric take to development, and does not become mounting hole employers, reflex reflector city, beads or rims that may sparkle or make small aspects of increased strength as a result of uncontrolled white out-of brief areas ( 1/dos knowledge distance in the take to point).
1.1 Air compressor. An air compressor regarding sufficient ability to improve air stress inside the supply and you will services reservoirs out-of 85 psi to a hundred psi if system was performing at vehicle maker’s restrict recommended r.p.meters. contained in this a period, during the mere seconds, determined by this new quotient (Genuine reservoir ability ? 25)/Required reservoir capability.
Repeat the method half dozen moments, improving the brake chamber heavens pressure of the ten psi anytime
(b) For each truck tractor are available toward or just after , and each solitary product vehicle are formulated on or immediately after , that is provided so you’re able to pull various other sky- braked vehicles, might be equipped with a power circuit which is effective at sending a breakdown signal from the antilock brakes(s) using one or higher towed auto(s) (elizabeth.g., trailer(s) and dolly(ies)) with the truck Abs malfunction lamp on taxi of towing vehicles, and you will shall have the method for connection in the electricity routine into towed automobile. Per instance vehicle tractor and you can unmarried tool car will also be equipped with indicative light, p required in step 1.6.2(a), mounted in front of along with obvious view of the fresh rider, that is triggered whenever breakdown rule routine explained above receives a rule indicating a stomach breakdown using one or higher towed vehicle(s). The new indication light will remain triggered as long as an abs malfunction laws from a single or even more towed vehicle(s) exists, once the ignition (start) key is within the “on” (“run”) condition, if the engine is actually powering. The newest sign lamp will be also triggered because the a check off light mode whenever ignition is looked to brand new “on” (“run”) reputation. Brand new signal lamp can be deactivated after the brand new look at of lamp means until a truck Abs malfunction laws are establish.
(a) In addition to the standards from dos.step 3.dos, for each and every truck and you can trailer converter dolly would be armed with an exterior antilock dysfunction indication lamp that fits the requirements of 2.3.3 (b) thanks to (d).
3.1 Stopping length – autos and you will buses. When stopped six moments for each and every mix of automobile form of, lbs, and you can rate given within the 3.step 1.step 1, on succession specified when you look at the Dining table We, for each vehicle tractor are formulated on otherwise once March step 1, 1997, each solitary tool car are created to the otherwise once February step one, 1998, shall take a look at minimum shortly after from inside the not more than the exact distance specified during the Desk II, counted in the area where direction of one’s solution braking system manage begins, with no part of the automobile making the newest path, and with wheel lockup let just as follows:
(b) To have car built to pull several other vehicle armed with sky brake system, the pressure from the fifty-cubic-inches try tank known within the step 3.4.1(a) shall, when counted regarding first movement of one’s provider brake control, fall in order to 5 psi in not more than 0.75 moments in the example of cars and you how does her dating work may busses, step 1.10 moments when it comes to trailer converter dollies, and you will step 1.00 seconds in the example of trailers aside from truck converter dollies.
cuatro.1.1 Shortly after burnishing brand new braking system pursuant so you’re able to S6.2.six, retain the braking system set-up on inertia dynamometer. With a primary braking system temperatures ranging from 125 °F. and you will two hundred °F., run a stop off 50 meters.p.h., maintaining braking system chamber air tension at the a constant 20 psi. Assess the average torque exerted of the brake since that time the specified air stress are reached before the brake stops and you will separate by static piled tire distance given from the tire brand to search for the retardation force. After every end, turn new brake drum or disc before the heat of one’s brake drops to ranging from 125 °F. and 2 hundred °F.
(a) Except given that considering in the six(b) and 6(c), for each and every vehicles except that a trailer converter dolly shall enjoys an excellent vehicle parking brakes that according to the standards off S6.step 1 fits the requirements of:
6.step 3.cuatro The parking braking system chamber demands having six.step 3.1 and you can six.3.2 are determined the following. To own vehicles and you will buses, with a first reservoir program stress out of one hundred psi and you will, in the event the designed to pull an automobile armed with air brake system, that have a beneficial fifty cubic inches test reservoir linked to the also have range coupling, one single leaks particular incapacity, in any most other brake system, regarding an associate made to contain compressed air or braking system fluid (consistent with the parenthetical terms specified when you look at the 6.3.1), are brought on the brake system. This new parking braking system handle is actuated together with challenges from the car’s parking braking system chambers try counted about three mere seconds then actuation is set up. To possess trailers, into supply range very first pressurized so you can a hundred psi utilizing the likewise have line part of the trailer sample rig (Shape 1) and you can, in the event the built to tow a car or truck equipped with heavens brakes, having a great fifty cubic inches try tank linked to the butt also provide line coupling, one unmarried leakage kind of inability, in just about any other brakes, of an associate built to include compressed-air otherwise braking system fluid (consistent with the parenthetical terminology specified into the six.3.1), is delivered throughout the brakes. The front likewise have range coupling are ventilated on the ambiance and you can the brand new demands from the car’s parking braking system chambers are counted three moments following ventilation is set up.
six.6.cuatro Getting trailers, which have initial standards because specified in the 6.six.5, the latest parking brakes is ready conference the minimum results given either in 6.step one otherwise 6.dos, that have people single leakages-types of incapacity, in every other brakes, away from a part built to consist of compressed air otherwise brake fluid (similar to the parenthetical statement specified inside 6.step 3.1), at the end of the test series given in the six.6.six.
9 Finally review. Always check this service membership brakes for the reputation out of changes and you may on brake indicator display relative to step 1.8 and dos.2.
S6.step one.10 In the an examination apart from a fixed parking decide to try, a truck tractor was examined at its GVWR because of the coupling they so you’re able to an enthusiastic unbraked flatbed partial-trailer (hereafter, handle trailer) since the specified inside S184.108.40.206 so you can S6.step one.10.4.
S6.dos.step three Heavens from the background climate is brought evenly and you can constantly more than brand new brake guitar or disk at the a speed out-of 2,two hundred foot each and every minute.