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Markings molded into the
rubber on this side.
Insert into the valve body this side first.
Figure 4 - Orientation of Inlet/Exhaust Valve
ASSEMBLY
1. Place the inlet valve spring(3) over the thick black rubber
portion of the inlet/exhaust valve(4). The spring rests on
the outer diameter of the rubber portion of the valve. While
holding the inlet/exhaust valve(4) on the inlet valve spring(3),
gently place both into the valve body, first the valve and
then the spring. Make sure the spring rests evenly on the
four ears of the inlet/exhaust valve. See figures 4 and 5.
2. Properly align the inlet valve spring(3) in the recess at the
end of the reservoir check valve assembly(1). Install the
reservoir check valve assembly (or SR-2 pipe nipple) into
the valve body. Torque to 200-300 inch pounds. Caution:
If servicing an SR-2 reuse the pipe nipple removed during
disassembly do not install the check valve assembly.
1
Reservoir
Inlet /Exhaust
3
Check Valve
Inlet
2
Valve
O-ring
Spring
5
Tie Wrap
Figure 5 - Modification Kit Assembly and Disassembly
Ears
4 Inlet/Exhaust Valve
Inlet Valve
Spring
4
Inlet/
Exhaust
Valve
Important: Note
the orientation of the
spring with the valve.
4
Valve
SR-5 Valve Shown
INSTALLATION
1. Install the valve on the reservoir. Apply thread sealant to
the reservoir check valve assembly beginning with the
second thread back from the end. NOTE: When using
pipe thread sealant take particular care to not allow the
sealant into the valve itself. Torque to 200-300 inch pounds.
2. Reconnect all air lines to the valve using the identification
made in REMOVAL step 1.
3. Install the green tie wrap(5) on the valve in a conspicuous
3
location to signify the recall modification was performed.
4. Perform OPERATIONAL AND LEAKAGE TESTS before
placing the vehicle back in service.
5. Complete and mail the recall documentation with the
removed inlet/exhaust valve(4) to Bendix. A self addressed
envelope is included for your convenience.
OPERATIONAL AND LEAKAGE TESTS
Check the tractor dash gauge against a gauge known to be
accurate before performing these tests. Connect the tractor
air lines to the trailer on which the valve is to be tested. Block
all wheels or hold the vehicles by means other than air brakes.
1. Install a gauge in the trailer reservoir(s). Build tractor and
trailer to full system pressure by placing the park control
valve and the trailer air supply valve in the charge position.
As system pressure reaches approximately 75-95 psi, the
trailer spring brakes should also build up to approximately
75-95 psi–before the reservoir(s) begin to charge.
2. When full system pressure is reached, and the spring brakes
are fully released, apply a soap solution to the valve exhaust
port and the vent. A one inch bubble in five seconds is
permissible.
3. Place the trailer air supply valve in the exhaust position.
The spring brakes should apply. Disconnect the trailer
supply line and soap the hose coupling to check for leaks.
A one inch bubble in five seconds is permissible.
4. Reconnect the trailer supply hose coupling and recharge
the trailer system. The spring brakes should release. Shut
off the engine. Open the trailer reservoir drain cock. The
tractor air system should bleed down to approximately 70
psi. The trailer spring brakes should remain released. After
the system is stabilized, leakage at the open drain cock
should not exceed a one inch bubble in five seconds.
5. If the valve does not function as described; or if leakage is
excessive, repair the valve, or replace it at the nearest
authorized Bendix parts outlet.
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