Jeep Wagoneer/Commando/Cherokee 1984-1998

Combination Valve

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Removal & Installation



See Figures 1, 2 and 3

A Diagnostic Readout Box (DRB II), or the equivalent type of scan tool, is essential to perform the bleeding of the ABS system.

The combination valve is not repairable and must be replaced if defective.

  1. Disengage the brake lines that connect the master cylinder to the combination valve.
  2.  
  3. On ABS equipped vehicles, disengage the brake lines that connect the combination valve to the Hydraulic Control Unit (HCU).
  4.  



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Fig. Fig. 1: Unplugging the pressure differential switch wiring harness coinnector from the top of the combination valve-1992 model shown

  1. Disengage the electrical connection from the combination valve.
  2.  
  3. On ABS equipped vehicles, slide the HCU solenoid harness connectors off the combination valve bracket and move the harness out of the way.
  4.  
  5. Unfasten the combination valve bracket retaining nuts and remove the combination valve from the vehicle.
  6.  



Click image to see an enlarged view

Fig. Fig. 2: Combination valve hydraulic connections-1995 model shown



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Fig. Fig. 3: Combination valve and bracket-1995 model shown

To install:
  1. Install the valve bracket on the mounting studs and tighten the nuts to 10-18 ft. lbs. (13-25 Nm).
  2.  
  3. Align and start the brake lines fittings in the combination valve by hand to prevent cross threading.
  4.  
  5. tighten the fittings just enough to prevent leakage.
  6.  
  7. Install and tighten the brake lines to the master cylinder and engage all electrical connections.
  8.  
  9. Bleed the brake system. Refer to the proper procedure in this section.
  10.  
  11. Test drive the vehicle and verify proper brake operation.
  12.  

 
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