Document ID: chunk:federal_register_of_legislation:F2006L03061:body:0:p7
Version: federal_register_of_legislation:F2006L03061
Segment Type: other
Provision Reference: 
Character Range: 19363–22584

for any increased movement of its components arising from wear. Such devices shall themselves contain provision for securing them throughout their working range in any position in which they may be adjusted to or to which they may themselves automatically adjust.

38.2.1.13.                Each 'Brake System' shall, when applied, produce a resultant braking force acting along the longitudinal centre line of the vehicle.

38.2.1.14.                The first call on the 'Stored Energy' shall be that of the 'Brake System'. Any other demand for 'Stored Energy' shall be disconnected automatically if the 'Stored Energy' level available becomes depleted to two-thirds of 'Normal Minimum Energy Level'.

38.2.1.15.                Where separate methods of actuation are provided for any of the functions of the 'Brake System', the actuation of one function shall not cause the operation of another function.

38.2.1.16.                 'Stored Energy' devices shall be safeguarded to prevent depletion of the 'Stored Fluid Energy' through failure of any part of the supplying system.

38.2.2.                           'Service Brake System'

38.2.2.1.                    The 'Service Brake System' shall be designed so that the braking force can be progressively increased and decreased by means of the 'Control Signal' from the towing vehicle.

38.2.2.2.                    The combined total energy capacity of energy storage devices incorporated into the 'Service Brake System' shall be not less than 8 times the combined maximum energy capacity of the service brakes actuating devices. In the case of compressed air 'Braking Systems', the ratio of air reservoir volume to actuator volume will be taken as being the ratio of energy capacity.

38.2.2.3.                    The elapsed time, as measured in accordance with the procedure specified in clause 38.3.11 for measuring brake actuation time response shall not exceed in the case of:

            (a) any brake actuator of any 'Axle Group' on the trailer, 0.35 seconds; and

            (b) any trailer or dolly rear service coupling for towed trailers, 0.25 seconds.

38.2.2.4.                    The elapsed time, as measured in accordance with the procedure specified in clause 38.3.11 for measuring brake release time, shall not exceed in the case of:

38.2.2.4.1.              the brake actuator on any trailer, 0.65 seconds; and

38.2.2.4.2.              any, trailer or dolly, rear service coupling for towed trailers, 0.55 seconds.

38.2.2.5.                    Each 'Axle' in the 'Service Brake System' shall have an individual 'GALR' not less than 'Axle' torque rating shall be determined according to clause 38.3.3 (Service Brake Effectiveness) and the fade performance according to clause 38.3.4 (Service Brake Fade Effectiveness).

    'Total Trailer Axle Load' at 'GTM'  Brake torque rating of individual 'Axle'
        Total brake torque rating of all 'Axles'.

38.2.2.6.                    The 'Established Retardation Coefficients' of the 'Service Brake System' shall be between the upper and lower bounds of Figure 1 (Service Brake Effectiveness Requirement) when tested according to clause 38.3.3 (Service Brake Effectiveness).