Document ID: chunk:federal_register_of_legislation:F2025C00108:front:0:p25
Version: federal_register_of_legislation:F2025C00108
Segment Type: other
Provision Reference: 
Character Range: 71689–74437

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
             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.
 4.                                 Service Brake Compatibility Test
     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 by 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 the manufacturer's 'GVM' and in a separate series of tests to the Group 'Axle Load' limits as specified in Table 2 if this results in a vehicle mass lower than the manufacturer's 'GVM'.
     2.                           Where the vehicle has a 'Rated Towing Capacity' of more than 4.5 tonnes and is not certified for the operation of trailer brakes using air at a positive pressure, the response of the 'Service Brake System' must be tested as follows..  The vehicle must be laden to the Group 'Axle Load' limits as specified in Table 2 or the manufacturer's 'GVM' whichever is the lesser, and a series of tests conducted by braking the vehicle to a stop from initial speed of 60 km/h.  The output energy level of the 'Service Brake System', 'Control' and the 'ERC' achieved must be recorded for each test.  For the first test an 'ERC' in the range 0.05 to 0.1 must be achieved.  Subsequent tests must be conducted increasing the 'ERC' in not less than 5 evenly spaced steps until an 'ERC' of not less than 0.45 is reached.
     3.                           The 'Service Brake System' 'ERC' must be determined according to either of the following:

                 where:

                 V is the initial speed in km/h
                 S is the