Height-Sensing Proportioning Valve: Notes
NOTE:
Height sensing proportioning valve adjustment will be required if a premature rear wheel lock-up exists and all brake linings are okay, height-sensing proportioning valve is replaced or if a complaint of a hard brake pedal effort exists with proper operation of power brake booster.
CAUTION:
Aftermarket load leveling devices such as air shock absorbers or helper springs MUST NOT be used on models with height-sensing proportioning valve. Using load leveling devices will cause height-sensing proportioning valve to reduce hydraulic pressure to rear brakes which may result in increased stopping distance.