1
®
Bendix
®
TC-7
™
Trailer Control Brake Valve
SD-03-824
GRADUATING SPRING
VALVE
FIGURE 1
HANDLE
BRACKET
EXTERIOR VIEW
CAM FOLLOWER
LOCKWASHER
(SPECIAL)
RETAINING RING
ADJUSTING RING
ADJUSTING RING
ADAPTER
PARTIAL VIEW
(VALVE & HANDLE)
CAM
SCREW
DESCRIPTION
The TC-7
™
trailer control brake valve is a hand operated control
valve that provides graduated control of service brake air
pressure. The most common vehicle application is the
independent control of the trailer’s service brakes on a tractor
trailer combination.
Typically, the TC-7
™
valve is mounted either inside the
steering column or clamped to the exterior of the column.
The three basic components of the TC-7
™
valve are available
separately (valve, handle, bracket) to accommodate the
appropriate mounting configuration.
HANDLE
PISTON
O-RING
SPRING
INLET SEAT
O-RING
19
18
17
15
1
11
10
9
8
7
4
6
2
3
5
12
13
14
16
O-RING
FRICTION
WASHER
SEALING
RING
EXHAUST VALVE
BODY
INLET
VALVE
O-RING
S Y S T E M
PARK
TRACTOR
PARK
TRAILER
PARK
TRACTOR
PARK
BRAKE
CHAMBERS
PP-1
S Y S T E M
PARK
PP-8
OPTIONAL
T . M . C .
TRACTOR
PARK
LQ-4
RATIO VALVE
TRAILER
CONTROL VALVE
E-7
DC-4
DS-2
DOUBLE CHECK
STOPLIGHT SWITCH
TP-3 TRACTOR PROTECTION
DC-4
DOUBLE
CHECK
VALVE
AIR
DRYER
COMPRESSOR
D-2 GOVERNOR
ST-3
S A F E T Y
VALVE
SUPPLY
RESERVOIR
LP-3 LOW
PRESSURE
INDICATOR
GAUGE
REAR AXLE
SERVICE
RESERVOIR
CHECK
VALVE
FRONT AXLE
SERVICE
RESERVOIR
LP-3
GAUGE
SR-1 SPRING
BRAKE VALVE
R-8 RELAY
VALVE
R-12 RELAY
VALVE
SPRING
BRAKES
SUPPLY LINE
SUPPLY LINE
ANTI-
COMPOUND
LINE
FIGURE 2 - TYPICAL PIPING DIAGRAM
TRUCK/TRACTOR SYSTEM
