4 Component Replacement
45
WABCO Maintenance Manual MM-0112 (Revised 07-18)
3. Lubricate the replacement seal and install it in Port 2 of the
solenoid valve.
4. Lubricate the large replacement O-ring and install it in the
groove of the relay valve supply port. Figure 4.11.
Figure 4.11
NOTE: Use WABCO-recommended lubricant.
5. Use the two M6 Allen-head bolts to attach the adapter to the
relay valve. Use a 5 mm Allen-head tool to tighten to 4-5 lb-ft
(6-8 N폷m). Figure 4.12.
@
Figure 4.12
6. Connect the supply air line to the supply port on the adapter.
7. Connect the treadle air line to the control port on the solenoid
valve. Place a wrench on the adapter to prevent the control port
from twisting. Tighten the fitting to 15 ft-lb (20 N폷m). Do not
over tighten.
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8. Attach the wiring connector to the solenoid valve. Hand tighten
only.
9. Remove the blocks and stands.
10. Test the installation.
Checking the Installation
1. Start the vehicle.
2. Fully charge the reservoirs with air. Shut off the vehicle.
3. Apply the brakes.
4. Listen for air leaks at all valves.
5. Drive the vehicle. Verify that the ABS indicator lamp operates
correctly.
Electronic Control Unit (ECU)
Removal
Park the vehicle on a level surface. Block the wheels to
prevent the vehicle from moving. Support the vehicle with
safety stands. Do not work under a vehicle supported only by
jacks. Jacks can slip or fall over. Serious personal injury and
damage to components can result.
1. Turn the ignition switch to the OFF position. Apply the parking
brake.
2. Place blocks under the front and rear tires to prevent the
vehicle from moving.
3. Disconnect the wiring harness connectors from the ECU.
4. Remove the mounting hardware. Remove the ECU.
Figure 4.13.
Figure 4.11
Figure 4.12
x
xxxx xxxxx
xxxxx xxxxx
1002044a
RELAY VALVE
SUPPLY PORT
1002045a
MOUNTING BOLTS
4-5 LB-FT (6-8 N•m)
O-RING
(INSTALLED)
SUPPLY
PORT
ATC VALVE
AND ADAPTER
CONTROL
PORT
ABS VALVE
PACKAGE
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