Western Australian Current Regulations Western Australian Current Regulations (1A) In this
regulation —
compressed air reserve , for a vehicle, means
compressed air stored on the vehicle for supplying the vehicle’s braking
system;
condensate drain valve means a device used to
remove water from the compressed air reserve for a vehicle fitted with air
brakes;
governor cut‑out pressure , of a vehicle,
means the air pressure at which the vehicle’s air brake compressor stops
supplying air to the vehicle’s air brake reservoir;
spring brake means a brake using one or more
springs to store the energy needed to operate the brake;
vacuum reserve , in relation to a vehicle, means
air at a low pressure stored on the vehicle for supplying the vehicle’s
braking system.
(1) If air brakes are
fitted to a motor vehicle, trailer or any vehicle in a
combination —
(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 heavy vehicle — 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 vehicle’s braking system; and
(d) any
spring brake fitted to the vehicle must not operate before the warning
mentioned in regulation 338(4)(a) or 341(4)(a) has been given.
[(2) deleted]
(3) If vacuum brakes
are fitted to a motor vehicle, trailer or any vehicle in a combination, the
vacuum supply must be able to build up a vacuum —
(a) to
the level when the warning signal mentioned in regulation 338(4)(a)
or 341(4)(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.
[Regulation 334 amended: Gazette
29 Mar 2019 p. 969.]