Document ID: chunk:federal_register_of_legislation:F2021C00434:body:0:p19
Version: federal_register_of_legislation:F2021C00434
Segment Type: other
Provision Reference: 
Character Range: 54156–57161

and incorporating one or more 'Brake Power Units 35/..'.
7.12.2.                          The test must be conducted while the vehicle is stationary.
7.12.2.1.                    Where a vehicle is fitted with a 'Variable Proportioning Brake System' the test must be conducted with the 'Variable Proportioning Brake System' set at  the mass specified in clause 4.1.9.1.
7.12.3.                          Before commencing the test the 'Stored Energy' device(s) must be charged to not more than the 'Average Operating Pressure' and the brakes must be adjusted according to the 'Manufacturer's' specifications for normal use.
7.12.4.                          The service brake 'Control' must be operated through a full working stroke by an operator seated in the normal driving position.
7.12.5.                          The pressure at the slowest reacting brake chamber must attain a level not less than 65 percent of the 'Average Operating Pressure' within a period not exceeding 600 milliseconds measured from the instant the 'Control' leaves the 'Initial Brake Control Location'.
7.12.6.                          For a vehicle equipped to tow a trailer which uses air at positive pressure;
         7.12.6.1.                   When the service brake 'Control' is operated through a full working stroke by an    operator seated in the normal driving position, the pressure measured at the extremity of a pipe 2.5 m long with an internal diameter of 13 mm which must be joined to the 'Coupling Head' of the 'Control Line 35/...' must reach 420 kPa within 400 milliseconds of the instant the 'Control' leaves the 'Initial Brake Control Location' ; and
         7.12.6.2.                   in the case of  hauling vehicles designed to be used in 'Road Train' combinations, having fully applied the service brake 'Control' and  the pressure measured at the extremity of a pipe 2.5m long with an internal diameter of 13 mm which must be joined to the 'Coupling Head' of the 'Control Line 35/...' has stabilised, the service brake 'Control' is fully released, the pressure measured at the extremity of the 2.5 m long pipe with an internal diameter of 13 mm joined to the 'Coupling Head' of the 'Control Line 35/...' must fall below 35 kPa within 650 milliseconds of the 'Control' being released.
7.13.                                Service Brake Compatibility Test
7.13.1.                          Vehicles equipped to tow a trailer which uses air at positive pressure must be braked to a stop from initial speed of 60 km/h. For the first test a 'Control Signal' of 0.2 'E' (130 kPa) measured at the 'Coupling Head' must be used. Subsequent tests must be conducted increasing the 'Control Signal' in increments of not greater than 0.2 'E' (130 kPa) until an 'Established Retardation Co-efficient' of not less than 0.45 is reached. The vehicle must be laden to:
7.13.1.1.                    For vehicles not fitted with a 'Variable Proportioning Brake System' the manufacturer's 'GVM' and in a separate test to