(1) Loosen air hose 247 at air brake protecting
valve supply port FV1.
(2) Start engine (TM 9-2320-365-10).
(3) Apply service brakes (TM 9-2320-365-10).
(4) Check for presence of air at air hose 247.
(5) Shut down engine (TM 9-2320-365-10).
(6) If air is not present, go to step 14 of this
fault.
(7) Tighten air hose 247 at air brake protecting
valve supply port FV1.
Change 1 2-1742.19
TM 9-2320-365-20-2