b.1. Front Tire Deflation.
Left and right front tires are deflated the same way. Left front tire shown.
Tires will deflate until approximately 10 psi (690 kPa) remains in tire.
Some resistance may be felt when turning kneeling valve. Valve will not
operate properly if it is not turned 1/2 turn (180 degrees).
Turn kneeling valve (1) 1/2 turn to left (180 degrees) to release air from front tire (2).
b.2. Cab Air Spring Deflation.
(1) Turn CAB knob (1) to the left and pull out.