FMVSS 106 PDF

The rule requires the vast majority of new heavy truck tractors to achieve a 30 percent reduction in stopping distance compared to currently required levels. For these heavy truck tractors approximately 99 percent of the fleet , the amended standard requires those vehicles to stop in not more than feet when loaded to their gross vehicle weight rating GVWR and tested at a speed of 60 miles per hour mph. For a small number of very heavy severe service tractors, the stopping distance requirement will be feet under these same conditions. Under the special procedures for calculating the fuel economy of those vehicles contained in AMFA, alternative and dual fueled vehicles are assigned a higher fuel economy value for CAFE purposes, which can result in manufacturers earning credits for their fleets. Since the carbon dioxide CO2 emitted from the tailpipes of new motor vehicles is the natural by-product of the combustion of fuel, the increased standards would also address climate change by reducing tailpipe emissions of CO2. Those emissions represent 97 percent of the total greenhouse gas emissions from motor vehicles.

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Over 19 to 24, inclusive 0. Mount the hose assembly to ensure straight, evenly distributed machine pull. Remove the brake hose assemblies from the water and condition in air at room temperature for 30 minutes. Bend the conditioned hose degrees around the conditioned cylinder at a steady rate in a period of 3 to 5 seconds. Examine without magnification for cracks. Utilize a cylinder with a diameter eight times the nominal outside diameter of the brake hose excluding armor.

In the case of hose shorter than the circumference of the cylinder, bend the hose so that as much of its length as possible is in contact. Utilize a test apparatus shown in Figure 3 which is constructed so that: a It has a fixed pin with a vertical orientation over which one end of the brake hose is installed.

The moveable pin maintains its orientation to the fixed pin throughout its travel in the horizontal plane. The other end of the brake hose is installed on the movable pin. Secure the hose to the fixture pins using a band clamp at each end of the hose. This atmosphere is to remain stable throughout the remainder of the test. Continue the cycling for 48 hours.

Without removing the hose from the test fixture, visually examine the hose for cracks without magnification, ignoring areas immediately adjacent to or within the area covered by the band clamps. Examine the hose with the movable pin at any point along its travel.

The machine shall be capable of increasing the pressure in the hose from zero psi to psi, and decreasing the pressure in the hose from psi to zero psi, within 2 seconds. Increase the oven temperature to degrees F degrees Celsius and maintain this temperature throughout the pressure cycling test. Perform pressure cycles on the brake hose assembly. Cool the brake hose assembly at room temperature for 45 minutes. Conduct the burst strength test in S6. Construct the salt spray chamber so that: a The construction material does not affect the corrosiveness of the fog.

Ensure that the solution is free of suspended solids before the solution is atomized. Make the PH measurements at 77 degrees Fahrenheit 28 degrees Celsius. Subject the brake hose assembly to the salt spray continuously for 24 hours. Brake hose constriction test requirements shall be met using at least one of the methods specified in S6. Other brake hose assemblies.

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