BENDIX tc-2 trailer control brake valve Manuel D’Utilisation

The TC-2

™

 brake valve is a hand operated control valve 

which features a graduated control of air pressure. The 
most common application is the control of trailer brakes 
independent of tractor brakes; however, the valve may be 
remotely operated type valve is connected to the operating 
handle by a linkage rod.

The TC-2

™

 brake valve is not intended for use as a parking 

control valve and should not be used for that purpose.

When the handle or actuating lever is moved in a clockwise 
direction from the released position, force is exerted on the 
pressure graduating spring through the action of the cam 
and cam follower. The force of the spring on the piston 
causes it to move down.

The exhaust seat, which is in the center of the piston, 
contacts the exhaust valve and closes the exhaust passage 
in the piston. The continued downward movement of the 
piston moves the inlet valve off its seat. Reservoir air 
pressure fl ows by the open inlet valve and out the delivery 
port.

The air pressure that fl ows by the open inlet valve also 
becomes effective on the bottom area of the piston. As 
the force of the air pressure beneath the piston balances 
the force of the depressed graduating spring above, the 
piston lifts slightly and the inlet valve returns to its seat. The 
exhaust valve remains seated so the fl ow of air through 
the valve is stopped and air pressure in the service line 
is held.

TC-2

™

 BRAKE 

VALVE

CONTROL VALVE

RESERVOIR

BRAKE

VALVE

COMBINATION STOP LIGHT SWITCH

AND DOUBLE CHECK VALVE

TRACTOR 

PROTECTION

VALVE

EMERGENCY HOSE

SERVICE HOSE