BENDIX ATR-1 ANTILOCK TRACTION RELAY Manual - Page 3

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TRACTION

SOLENOID

RELAY PISTON

REAR AXLE

RESERVOIR

FIGURE 4 - SERVICE BRAKE APPLICATION

SERVICE BRAKES HOLDING (FIGURE 5)

The air pressure being delivered to the brake chambers is

also present beneath the relay piston.

When the air pressure above and below relay piston is equal,

the piston moves slightly allowing the inlet valve to return to

TRACTION

SOLENOID

RELAY PISTON

REAR AXLE

RESERVOIR

FIGURE 5 - SERVICE BRAKES HOLDING

CONTROLLER

CHECK VALVE

INLET EXHAUST

its seat. The exhaust valve remains closed. With both the

inlet and exhaust valves closed, air pressure in the brake

chambers is held stable and neither increases nor decreases.

CHECK VALVE

INLET EXHAUST

BRAKE

VALVE

MODULATOR

SPRING BRAKE

BRAKE

VALVE

MODULATOR

SPRING BRAKE