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Home >> Chevrolet >> 1998 >> Forward Control P30, 6.5 F, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Disc Brakes & Drum Brakes) >> Adjustments >> Height-Sensing Proportioning Valve >> "C" & "K" Series

"C" & "K" Series

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  1. Raise and support vehicle. Ensure rear axle is hanging free and valve is securely bolted to frame before height-sensing proportioning valve is adjusted. See Fig 1.
  2. Remove nut and lever assembly from valve. Rotate valve shaft to allow installation of Adjustment Gauge (15592484). Seat "D" shaped center hole over valve shaft. Gauge must be positioned in valve mounting hole.
  3. Install lever assembly to valve shaft with a "C" clamp or locking pliers to seat lever nylon bushing on serrated valve shaft. DO NOT install lever using attaching nut. Doing so can result in improper valve adjustment.
  4. Install valve shaft nut and tighten to 80 INCH lbs. (9 N.m). Cut tang from body of adjustment gauge, and allow valve to rotate freely. Lower vehicle and test brakes.
Fig 1: Height-Sensing Proportioning Valve ("C" & "K" Series)
G91B13756Courtesy of GENERAL MOTORS CORP.
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