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Bendix
TCS-9000
HORIZONTAL PORTS
FIGURE 1 TCS-9000
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trailer control valve configurations
DESCRIPTION
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The Bendix
TCS-9000
to operate the trailer brakes independently of the tractor
brakes. It may be used, however, wherever a hand controlled
pressure graduation function is desired.
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The TCS-9000
valve is handle operated and is designed for
dash or panel mounting. It is not designed for use as a
parking brake control and should never be used to hold the
brakes applied when the operator leaves the vehicle.
OPERATION
APPLYING
When the handle is pulled through its 55° arc, the cam is
rotated accordingly. The cam action forces the cam follower
downward, compressing the graduation spring and creating
a force on the plunger which depresses the inlet valve and
delivers air under pressure to the delivery port.
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Control Brake Valve
1/4" PTC
EXHAUST
3/8" PTC
DELIVERY
3/8" PTC
SUPPLY
control brake valve is normally used
HANDLE
CAM
CAM
FOLLOWER
EXHAUST
DELIVERY
SUPPLY
FIGURE 2 TCS-9000
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valve sectional
HOLDING
As delivery pressure builds up in the delivery port, it is also
effective under the plunger causing it to balance the force of
the graduation spring until the inlet valve is seated against
its seat in the body and is also seated against the plunger,
thus preventing the delivery air from exhausting through the
center of the plunger, maintaining the desired pressure in
the delivery line.
RELEASING
When the handle is released or moved to its release position,
the cam follower is permitted to rise, opening the exhaust
passage and allowing the air pressure in the delivery line to
exhaust out the exhaust port.
GRADUATION
SPRING
PLUNGER
INLET VALVE
1