TM-9-2320-366-20-2 MTV Unit Maintenance Manual M1083 Series - Volume 2 Download
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TM 9-2320-366-20-2  (1) Loosen air hose 161 at park control two-way  check valve delivery port.  (2) Start engine (TM 9-2320-366-10-1).  (3) Check for presence of air at park control  two-way check valve delivery port.  (4) Shut down engine (TM 9-2320-366-10-1).  (5) If air is not present, replace park control  two-way check valve (para 11-19).  (6) If air is present, replace air hose 161  (para 11-21).  (7) Tighten air hose 161 at park control two-way  check valve delivery port.  Change 1 2-1977  (1) Loosen air hose 161 at trailer service brake  valve supply port.  (2) Start engine (TM 9-2320-366-10-1).  (3) Check for presence of air at air hose 161.  (4) Shut down engine (TM 9-2320-366-10-1).  (5) If air is not present, go to step 5 of this  fault.  (6) If air is present, replace trailer service brake  valve (para 11-32).  (7) Tighten air hose 161 at trailer service brake  valve supply port.