Bus Parking Brake vs. Service Brake application
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Simple, one is the spring brakes and are only on the drive axle.
The service brakes are on all wheels and are operated by application of air.
Emergency brakes apply when there is a loss of pressure to the primary chamber, there is no way to simulate this.
An emergency application is like that of an airline getting disconnected on a train, pressure from the tank is greater than the line and one way valves dump pressure to the brake chambers.
And that is why there is a "crossover" valve.
Arabhacks 6 months ago
i dont get it
knightrider1545 7 months ago
Very well put together! Paul
dreamscapeeagle 2 years ago