Bendix Commercial Vehicle Systems SRC-7000 User Manual
Bendix® SRC-7000™ Trailer Spring Brake Valve
1/4” NPT
CONTROL
1/4” NPT
SUPPLY
1/2” NPT
SPRING BRAKE
RESERVOIR
EXHAUST
3/8” NPT
DELIVERY (4)
SD-03-4656
EXHAUST
FIGURE 1 - BENDIX® SRC-7000™ TRAILER SPRING BRAKE VALVE
DESCRIPTION
The Bendix® SRC-7000™ trailer spring brake valve is
a reservoir-mounted trailer valve that can control up to
six spring brake actuators during parking or emergency
applications. It has the following capabilities:
• Automatically applies trailer spring brakes in the event
PORTS
1 - 1/2" NPT Spring Brake Reservoir Mounting (RES)
1 - 1/4"-18 NPT Trailer Supply (1 SUP)
1 - 1/4"-18 NPT Trailer Service (4 CONT)
4 - 3/8"-18 NPT Delivery (2 DEL)
of a breakaway or trailer supply line failure.
• Protects trailer reservoir(s) air pressure in the event of
a breakaway or trailer supply line failure.
• Does not allow an automatic trailer spring brake
application with air pressure loss in trailer reservoir(s).
1 - Exhaust (3 EXH)
The SRC-7000
of a composite body, pressure protection valve and
reservoir-mounting nipple.
• Allows the trailer spring brakes to be applied and released
repeatedly with a failed trailer reservoir(s):
• Anti-compounding prevents an overriding service brake
signal while the trailer supply line is at atmospheric
pressure.
• Does not allow service system charging if a failure occurs
in the parking brake circuit.
• Muffl er & snorkel capable.
™
trailer spring brake valve consists
1
TRAILER
SERVICE
SER EMSER EM
TRAILER
SUPPLY
Trailer Schematic
TRAILER
SERVICE
D
D
C
D
D
SER EM
TO
ACCESSORIES
SER EM
S
D
C
D
D
D
SER EM
™
C-5
CUT-OUT
COCK
SRC-7000
VALVE
™
DUMMY
COUPLING
R-12P
RELAY
VALVE
™
PILOT
SRC-7000
VALVE
QUICK
D
S
C
D
™
C
RELEASE
SERVICE
RELAY
SERVICE
BRAKE
CHAMBER
VALVE
TRAILER
SUPPLY
™
C-5
CUT-OUT
COCK
SER EM
Towing Trailer Schematic
FIGURE 2 - TYPICAL SYSTEM SCHEMATICS WITH A BENDIX® SRC-7000™ TRAILER SPRING BRAKE VALVE
2
DUMMY
COUPLING
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