Bendix Commercial Vehicle Systems TC-6 BRAKE VALVE 3/04 - Manual

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Bendix ® TC-6 ™ Trailer Control Brake Valve
SD-03-821
FIGURE 1
DESCRIPTION
The Bendix ® TC-6 ™ trailer control brake valve is normally
used to operate the trailer brakes independently of the tractor
brakes. It may be used, however, wherever a hand controlled
pressure graduation function is desired.
The TC-6 ™ valve is handle operated and is designed for panel
or dog house mounting.
The TC-6 ™ trailer control brake valve 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 (item 10) is pulled through its 75° arc, the
roller cam (item 11) is rotated accordingly. The cam action
forces the cam follower (item 9) downward, compressing
the graduating spring (item 6) and creating a force on the
plunger (item 12) which depresses the inlet valve (item 2)
and delivers air under pressure to the delivery port.
HOLDING
As delivery pressure builds up in the delivery port, it is also
effective under the plunger (12) causing it to balance the
force of the graduating spring (6) until the inlet valve (2) is
seated against its seat in the body and is also seated against
the plunger (12), thus preventing the delivery air from
exhausting through the center of the plunger (12),
maintaining the desired pressure in the delivery line.
RELEASING
When the handle is released or moved to its release position,
the cam follower (9) is permitted to rise, opening the exhaust
passage and allowing the air pressure in the delivery line to
exhaust out the exhaust port.
PREVENTIVE MAINTENANCE
Important: Review the Bendix Warranty Policy before
performing any intrusive maintenance procedures. A warranty
may be voided if intrusive maintenance is performed during
the warranty period.
FIGURE 2
EXHAUST
DELIVERY
SUPPLY
KNOB
13
11
14 8
10
9
7
6
12
5
15
4
2
3
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