Document ID: chunk:federal_register_of_legislation:F2016C00773:clause:1_14:p34
Version: federal_register_of_legislation:F2016C00773
Segment Type: clause
Provision Reference: sch 1 cl 14 (pt 34/51)
Character Range: 97349–100075

is no manufacturer's specification—650 kilopascals.
 (2) The pressure must reach at least 420 kilopascals within:
 (a) 1.0 seconds of the rapid and complete application of the foot‑operated control on a B‑double; or
 (b) 1.5 seconds of the rapid and complete application of the foot‑operated control on a road train.
 (3) After the brakes have been fully applied, the pressure must fall to 35 kilopascals or the pressure at which the friction surfaces cease to contact each other within:
 (a) 1.0 second of the release of the foot‑operated brake control on a B‑double; or
 (b) 1.5 seconds of the release of the foot‑operated brake control on a road train.
 (4) In subclause (1), least favoured chamber means the brake chamber with the longest line to the treadle valve in the prime mover.

6.17  Recovery of air pressure for brakes in a B‑double or road train
  The air pressure in each air brake reservoir in a B‑double or road train must recover to at least 420 kilopascals within one minute after 3 full brake applications have been made within a 10 second period if, before the 3 brake applications have been made:
 (a) the engine is running at maximum speed; and
 (b) the governor cut‑in pressure is no higher than:
 (i) the pressure recommended by the manufacturer; or
 (ii) if there is no recommendation by the manufacturer—550 kilopascals; and
 (c) the initial air pressure in the storage tanks of the vehicles is not less than:
 (i) the arithmetic average of the maximum and minimum pressures in the operating pressure range specified by the manufacturer of the vehicle; or
 (ii) if there is no manufacturer's specification—650 kilopascals.

6.18  Air supply for brakes in a B‑double or road train
  A B‑double or road train that uses compressed air to operate accessories must have:
 (a) sufficient air compressor capacity and air receiver volume to ensure that the operation of the accessories does not adversely affect brake performance; and
 (b) a compressed air system built to ensure that the brake system is preferentially charged.

6.19  Brake line couplings
 (1) Brake line couplings on the same part of a vehicle in a B‑double or road train must not be interchangeable.
 (2) The couplings must be polarised in accordance with Australian Standard AS D8 – 1971, Hose Couplings for Use with Vacuum and Air‑Pressure Braking Systems on Prime Movers, Trailers and Semi‑trailers, if the hoses used with the brake couplings are used for the same purpose as the hoses described in the Australian Standard.

6.20  Simultaneous parking brake application
  If the parking brake of a motor vehicle in a B‑double or road train is applied, the parking brakes of any attached trailer (except a trailer carrying wheel chocks