Jeep CJ/Scrambler 1971-1986 Repair Guide

Proportioning Valve

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The proportioning valve is actually a three part unit, containing a metering valve, pressure differential valve and brake pressure warning switch. If any of these functions fails, the unit must be replaced. It is not repairable. Two different types of valves were used. On models in the early 1970s, a D-type valve was used, in the late 1970's, a Type W was also used. They are similar in appearance and the only significant difference is in the method of holding open the valve during bleeding. Type W uses tool J-26869; type D uses tool J-23709. The valves are not interchangeable, however. In late 1983, the W-type became the only type used.

The valve is located on the frame rail, directly under the driver's position.

REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4 and 5

  1. Disconnect the brake lines at the valve and plug them.
  2.  
  3. Unbolt and remove the valve.
  4.  
  5. Installation is the reverse of removal. Bleed the system.
  6.  



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Fig. Fig. 1: Type D combination valve. The valve is mounted on the frame



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Fig. Fig. 2: Type W combination valve



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Fig. Fig. 3: The proportioning valve is mounted on the drivers side of the frame at the front of the vehicle



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Fig. Fig. 4: Metering valve tool installation on the type D proportioning valve



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Fig. Fig. 5: Metering valve tool installation on the type W proportioning valve

 
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