Air Brake Manual


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Loss of supply reservoir air

Rupture of the compressor discharge line results in loss of pressure from the supply reservoir. In Figure 48, the one-way check valves have prevented primary and secondary reservoir air from escaping back to the supply reservoir and the ruptured line.

There is sufficient reserve air pressure in the primary and secondary reservoirs for a limited number of brake applications to stop the vehicle before the parking brakes are activated.

Tractor and trailer with loss of supply-reservoir pressure
Figure 48. Tractor and trailer with loss of supply-reservoir pressure
Click for larger image. 

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Rev: 2018