BENDIX SD-03-3617 Manual do Utilizador descarregar pdf (Página 4)

AUTOMATIC

In the event of trailer breakaway or a sudden complete

failure of the trailer supply line, the button of the PP-7

™

valve will pop out when air pressure in the supply line falls

below 40 P.S.I.

OPERATION - AUTOMATIC EXHAUST (NO OVER

RIDE)

If the driver holds the button of the PP-7

™

valve in after

supply air pressure has dropped below the 40 P.S.I.

automatic pop out pressure, the control piston will move

into the exhaust position when control port pressure falls

below 20 P.S.I.

OPERATION - PARK APPLICATION

During a parking brake application, the park control valve

removes air pressure from the control port of the PP-7

™

valve. The button of the PP-7

™

valve remains in.

With air pressure removed from the control port of the

PP-7

™

valve, the control piston moves away from the

control inlet and exhaust valve. The inlet valve seats and

the exhaust passage through the control piston is open.

Air at the delivery port of the PP-7

™

valve is exhausted at

the exhaust port of the PP-7

™

valve.

FIGURE 6 - PP-7

™

TRAILER SUPPLY VALVE MANUAL EMERGENCY

FIGURE 7 - PP-7

™

TRAILER SUPPLY VALVE PARK APPLICATION

#1 Service

Reservoir

#2 Service

Reservoir

Double

Check

Valve

Park

Control

Valve

Parking

Brakes

Supply

Port

Plunger

Inlet & Exhaust

Exhaust Vent

Control Inlet

and Exhaust

Exhaust

Port

Control

Piston

PP-7

™

VALVE MANUAL EMERGENCY

PP-7

™

VALVE PARK APPLICATION

To Tractor

Protection

Control Port

#1 Service

Reservoir

#2 Service

Reservoir

Double

Check

Valve

Park

Control

Valve

Parking

Brakes

Supply

Port

Plunger

Inlet & Exhaust

Exhaust Vent

Control Inlet

and Exhaust

Exhaust

Port

Control

Piston

To Tractor

Protection

Control Port

1 2 3 4 5 6 7

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