10
Installation
WARNING
You must use a Schedule 80 hex nipple (3/4-inch NPT) to mount the ECU/dual modulator valve
assembly securely to the air tank to avoid possible serious personal injury and damage to the
component
.
1. Use a 3/4-inch NPT Schedule 80 hex nipple to attach the ECU/dual modulator valve assembly to a
reinforced air tank. Apply SAE-standard, DOT-approved sealing paste to either the
fi
rst few threads or
over the whole length. Hand-tighten it with a minimum of 2.5 turns.
Note if a minimum of 2.5 turns
cannot be achieved, remove and inspect.
NOTICE
WABCO does not recommend the use of a vise when installing the hex nipple. Use of a vise may
cause overclamping. Overclamping may damage the internal components of the ECU/dual modulator
valve assembly.
2. Use a 3/4-inch NPT pipe plug to plug the unused supply port. Apply SAE-standard, DOT-approved
sealing paste to either the
fi
rst few threads or over the whole length. Pipes with pre-applied thread
sealant may also be used.
3. Rotate and tighten the ECU/dual modulator valve assembly a minimum of 3 turns and verify the
exhaust port faces DOWN and the connection is secure. Use a torque wrench on the 3/4-inch pipe
plug installed on the front supply port to verify the valve is tightened to 59-148 lb-ft (80-200 Nm).
5.1.2 Mounted to Cross Member of Vehicle (Mounting Bracket Not Supplied)
Refer to Figure 5.
Fig. 5
ECU/DUAL MODULATOR VALVE MOUNTED
TO A CROSS MEMBER OF THE VEHICLE WITH
CONTROL PORT FACING FRONT OF TRAILER
FRONT OF
TRAILER
ECU/DUAL MODULATOR VALVE MOUNTED WITH
CONTROL PORT FACING REAR OF TRAILER
FRONT OF
TRAILER
Exhaust
port
must face
DOWN.
Plug all unused
ports.
Exhaust
port
must face
DOWN.
Plug all
unused ports.
CONTROL
PORT
CONTROL
PORT
4014264a
