sch.1-sec.121Supply of air or vacuum to brakes

sch.1-sec.121 Supply of air or vacuum to brakes

If air brakes are fitted to a vehicle— the vehicle’s air brake compressor must be able to build up air pressure to at least 80% of the vehicle’s governor cut-out pressure in 5 minutes or less after the compressed air reserve is fully used up; and 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 a spring brake fitted to the vehicle must not operate before the warning mentioned in section 125 (4) (a) or 128 (3) (a) is given. If vacuum brakes are fitted to a vehicle, the vacuum supply must be able to build up vacuum— to the level when the warning signal mentioned in section 125 (4) (a) or 128 (3) (a) no longer operates within 30 seconds after the vacuum reserve is fully used up; and to the normal working level within 60 seconds after the vacuum reserve is fully used up. In this section— air brake compressor , of a vehicle, means a compressor for supplying air to the vehicle’s air brakes. 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 1 or more springs to store the energy needed to operate the brake. vacuum reserve , in relation to a vehicle, means air at low pressure stored on the vehicle for supplying the vehicle’s braking system. (sch.1-sec.121-ssec.1) If air brakes are fitted to a vehicle— the vehicle’s air brake compressor must be able to build up air pressure to at least 80% of the vehicle’s governor cut-out pressure in 5 minutes or less after the compressed air reserve is fully used up; and 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 a spring brake fitted to the vehicle must not operate before the warning mentioned in section 125 (4) (a) or 128 (3) (a) is given. (sch.1-sec.121-ssec.2) If vacuum brakes are fitted to a vehicle, the vacuum supply must be able to build up vacuum— to the level when the warning signal mentioned in section 125 (4) (a) or 128 (3) (a) no longer operates within 30 seconds after the vacuum reserve is fully used up; and to the normal working level within 60 seconds after the vacuum reserve is fully used up. (sch.1-sec.121-ssec.3) In this section— air brake compressor , of a vehicle, means a compressor for supplying air to the vehicle’s air brakes. 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 1 or more springs to store the energy needed to operate the brake. vacuum reserve , in relation to a vehicle, means air at low pressure stored on the vehicle for supplying the vehicle’s braking system.

• (a) the vehicle’s air brake compressor must be able to build up air pressure to at least 80% of the vehicle’s governor cut-out pressure in 5 minutes or less after the compressed air reserve is fully used up; and
• (b) 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
• (c) a spring brake fitted to the vehicle must not operate before the warning mentioned in section 125 (4) (a) or 128 (3) (a) is given.
• (a) to the level when the warning signal mentioned in section 125 (4) (a) or 128 (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.