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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Disc Brake System & Drum Brake System >> Adjustments >> Height-Sensing Proportioning Valve >> "C" & "K" Series

"C" & "K" Series

Ensure rear axle is hanging free and valve is securely bolted to frame when lever is attached to valve before height-sensing proportioning valve is adjusted. See Figure.

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