TM 9-2320-364-20-32-2163(1) Remove four nuts and wheel cover.(2) Start engine (TM 9-2320-364-10).(3) Set CTIS controller to HIGHWAY.(4) Press CTIS START button.(5) Check for air pressure in hub to wheelvalve air lines by cracking open fittings at wheel valve.(a) If air is escaping, turn OFF ENGINEswitch and repair or replace wheelvalve (Para 13-11).(b) If no air is escaping, wheel valve isOK.(6) Turn OFF ENGINE switch.AUDIBLE INSPECTIONWear safety goggles when performing leakage tests on valves. Failure to do so may result in serious eye injury due to high pressure air.Exercise extreme caution when working around wheels or under truck while engine is operating. Movement of truck may cause injury or death to personnel.