(1) Tighten air hose 109 at two-way check valve
supply port.
(2) Loosen air hose 119 at delivery port of
two-way check valve.
(3) Release SYSTEM PARK (TM 9-2320-365-10)
and check for presence of air at air hose 119.
(4) If no air is present, replace two-way check
valve (para 11-14).
TM 9-2320-365-20-2
Change 1 2-1655