127Supply of air or vacuum to brakes

127 Supply of air or vacuum to brakes (1) If air brakes are fitted to a vehicle: (a) the compressor supplying air to the brakes must be able to build up air pressure to at least 80% of the governor cut-out pressure in not over 5 minutes after the compressed air reserve is fully used up; and (b) for a vehicle with a GVM over 4.5 tonnes – the air storage tanks must have sufficient capacity to allow 5 applications of the service brakes before the air pressure drops below half the governor cut-out pressure; and (c) there must be an automatic or manual condensate drain valve at the lowest point of each air brake reservoir in the system; and (d) any spring brake fitted to the vehicle must not operate before the warning mentioned in rule 131(4)(a) or 134(3)(a) has been given.

Motor Vehicles (Standards) Regulations 2003 – Australian Vehicle Standards Rules 65 (2) If vacuum brakes are fitted to a vehicle, the vacuum supply must be able to build up vacuum: (a) to the level when the warning signal mentioned in rule 131(4)(a) or 134(3)(a) no longer operates within 30 seconds after the vacuum reserve is fully used up; and (b) to the normal working level within 60 seconds after the vacuum reserve is fully used up.