Trim Adjustment (On Car)
NOTE:
Trim adjustment should be made with a full fuel tank (or equivalent load at rate of 6 lbs. per gallon).
Raise car with axle supported. Remove shock absorber line at control valve. Connect a fill valve to air supply line. Inflate shock absorbers to 8-15 psi. Jounce car to neutralize suspension. Connect test gauge to shock absorber adapter on control valve and attach an air pressure source (80-110 psi) to gauge. Now loosen height control valve lever adjusting nut. Hold overtravel body in exhaust position until air escapes from exhaust valve port. Slowly move overtravel body and tighten nut at point of minimum air bleed through port. With nut tight, a slight continuous air bleed should be noticeable. Remove tools, lower car and inflate system through service valve on compressor.