Document ID: chunk:federal_register_of_legislation:F2021C00434:body:0:p3
Version: federal_register_of_legislation:F2021C00434
Segment Type: other
Provision Reference: 
Character Range: 8598–11777

include SA, SAE, BS, JIS, DIN, ISO and ECE standards.
4.1.7.                              Traction control systems may utilize part of the 'Service Brake System' provided that, except for parts common to both the traction control system and the 'Service Brake System', the traction control system or any failure of it can not interfere with normal braking.
4.1.8.                              Brake line couplings must not be interchangeable and must be polarized.  Couplings must comply with the requirements of AS 4945-2000 Commercial road vehicles - Interchangeable quick connect/release couplings for use with air-pressure braking systems.
4.1.9.                              Where the vehicle is equipped to tow a trailer which uses air at a positive pressure, the 'Established Retardation Coefficient' of the 'Service Brake System' measured using the general test conditions of part 6 and the particular test conditions of clause 7.13 must be between the upper and lower boundaries of:
4.1.9.1.                        Figure 1 for each value of 'Control Signal' used, when fully laden; and
4.1.9.2.                        For vehicles fitted with a 'Variable Proportioning Brake System', Figure 2 for each value of 'Control Signal' used, when at 'Lightly Loaded Test Mass 35/..'; and
4.1.9.3.                        For vehicles fitted with a 'Variable Proportioning Brake System', progressively between Figure 2 and Figure 1 for each value of 'Control Signal' used. 'Established Retardation Coefficients' may be determined by calculation for intermediate states of load between 'Lightly Loaded Test Mass 35/..' and fully laden. The calculations must include not less than 5 points and include any critical point.
4.1.9.4.                        Where the vehicle is a variant of a previously tested vehicle and the effects of the changes on braking performance are known by a test conducted on a complete vehicle, a component or a sub-assembly of components, the requirements of this clause can be met by 'Approved' calculations.
4.1.10.                          Where the vehicle has a 'Rated Towing Capacity' of more than 4.5 tonnes, either:
4.1.10.1.                                  the vehicle must have certification which provides for the operation of trailer brakes using air at a positive pressure as described in clause 4.1.9 or
4.1.10.2.                    the 'Manufacturer' must supply to the 'Administrator' sufficient data to allow the vehicle's 'Service Brake System' to be modelled under laden braking conditions.  Provision of the data derived from the tests performed as described by clause 7.13.2 will be considered as sufficient to meet the requirements of this clause.
4.1.10.3.                    Where the vehicle is a variant of a previously tested vehicle and the effects of the changes on braking performance are known by a test conducted on a complete vehicle, a component or a sub-assembly of components, the requirements of this clause can be met by 'Approved' calculations.
4.1.11.                                        Where the 'Service Brake System' incorporates a single 'Brake Power Unit 35/...' an 'Audible Indicator' must be provided