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Air Brake Check Inside Cab<br />
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Start air test<br />
• Place chock block against down hill side of the rear wheel<br />
• Prior to starting engine , pump service brakes until air gauges read<br />
about 70 – 80 psi.<br />
• Start engine (Ensure Tillerman is in bucket on Deadman switch)<br />
Max air<br />
• Build air pressure to maximum 120 to 130 psi (at idle)<br />
Governor cut out<br />
• When air pressure stops rising (at idle) – air dryers may release<br />
• Give reading for both primary and secondary air gauges<br />
• The maximum cut out pressure is 130 psi<br />
Governor cut in<br />
• Pump service brake pedal slowly (push and hold for 3 seconds , then<br />
release and wait for 4 seconds , then repeat if necessary) until<br />
governor cuts in. The minimum cut in pressure is 85 psi. Continually<br />
watch air gauge needles for upward movement.<br />
• If gauges do not move upward (governor cut in) , continue to pump<br />
brakes slowly (as above) release about 5 psi. each time until governor<br />
cuts in.<br />
• The gauges will start to move upward<br />
• Give reading for both primary and secondary air gauges<br />
• Build air back to maximum
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