Bendix Commercial Vehicle Systems GEN 5 ABS - Manual (Page 33)

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FIGURE 33 - Rear Axle Valve Assemblies – Standard and ATC Version Shown
ABS Modulator Valve
Removal
1. Turn ignition switch to the OFF position, and apply
parking brake.
CAUTION: Block wheels before beginning this procedure.
Follow all standard safety procedures, outlined by, but not
limited to, the General Precautions listed on page 13 of
this document.
2. Disconnect the wiring connector from the ABS valve.
3. Disconnect the air lines from the supply and delivery
ports of the ABS valve.
4. Disconnect the valve mounting fasteners.
5. Remove the ABS valve.
NOTE: To service either modular valve or the relay valve,
remove the entire assembly and then replace the individual
components (valve).
Installation
1. Install the valve. Torque fasteners to manufacturers
specification.
2. Connect air lines.
• Supply to port 1 on valve.
• Service brake chamber to delivery port 2.
3. Connect the wiring connector to the ABS valve.
4. Test the installation:
• Modulator Valve Leak Test—Make and hold brake
application. No audible air leaks are permitted.
• Modulator Valve Component Test with Hand-Held
Diagnostic Tool—Select valve routines. Verify
proper valve location and operation with tool. Drive
the vehicle and verify ABS indicator lamp operates
properly.
5. Make several brake applications and check for prompt
brake chamber applications and release at all wheels.
Check the cable connections.
6. Clear codes.
7. Drive the vehicle and verify that the ABS indicator lamp
operates properly.
Standard Rear Axle
Valve Assembly
ATC Rear Axle
Valve Assembly