Document ID: chunk:federal_register_of_legislation:F2006L03061:body:0:p11
Version: federal_register_of_legislation:F2006L03061
Segment Type: other
Provision Reference: 
Character Range: 30636–33818

the specified braking tests.

38.3.2.6.                    All road tests shall be conducted with the trailer loaded to 'MLTM' and energy storage devices charged to 'Normal Minimum Energy Level', unless otherwise required by this Rule.

38.3.2.7.                    The test surface shall be either concrete or bitumen pavement and shall be free from loose material.

38.3.2.8.                    No towing vehicle braking system or other contrived means shall contribute to braking effort, and the towing vehicle engine shall be declutched or neutral engaged, during the braking tests required by this Rule.

38.3.2.9.                    The 'Brakes' shall be burnished before conducting any effectiveness tests according to the brake manufacturer's recommended procedures.

38.3.2.10.                The 'Brake System' shall be adjusted in accordance with the brake manufacturer's recommendations before performance tests are conducted.

38.3.2.11.                The performance requirements shall be met with no deviation of the vehicle from its course greater than 300 millimetres.

38.3.3.                          Service Brake Effectiveness

38.3.3.1.                    Each 'Unique' trailer 'Service Brake System' shall be either tested in accordance with clause 38.3.2 (general test conditions) and clause 38.3.3.2 (service brake effectiveness test) or be shown by calculation, based on data for approved components, as detailed in clause 38.4.1 (service brake effectiveness calculation), to meet the requirements of clause 38.2.2.6 (refers to Figure 1).

38.3.3.2.                    Service Brake Effectiveness Test.

38.3.3.2.1.              The initial speed at the point where trailer braking commences shall be:

            (1)  for trailers having a 'Aggregate Trailer Mass' less than 45 tonnes and not being restricted by design speed limitations, 58 to 64 km/h.

            (2)  for trailers having a 'Aggregate Trailer Mass' greater than 45 tonnes, or special trailers having a design speed less than 58 km/h, not less than the 'Manufacturer's' nominated design speed.

38.3.3.2.2.              The trailer shall be laden to 'LTM' and braked to a stop from initial speed starting with a 'Control Signal' of 0.2 'E' and in increasing increments of not greater than 0.2 'E' for subsequent stops until an 'Established Retardation Co-efficient' of not less than 0.45 is achieved.

38.3.3.2.3.              In the case of a compressed air 'Brake System' the 'Control Signal', applied to the 'Control Line' at the front of the trailer, shall reach 65 percent of the final value in less than 0.22 second.

Where the available 'Control Signal' is slower than 0.22 second the additional time will be allowed for entirely in clause 38.3.3.2.5 by adjusting the K1 or K3 term. The response of a vehicle control system should be determined by using an 800 millilitres vessel to simulate the trailer, with the pressure being measured at the point most remote from that of air entry.

38.3.3.2.4.              Either stopping distance or time from the point where the trailer brake control commences actuation from the "off" position, to the point where the