TM 9-2350-287-10TROUBLESHOOTING (Auxiliary Power Unit Engine) (continued)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 4. Check battery connections.If battery connections are loose, broken, or corroded, notify Unit maintenance.Step 5. Check air intake for restriction.Remove any restrictions, or clean air filters (p. 3-44).Step 6. Check fuel level.If fuel level is low, refuel vehicle (p. 3-24).If condition persists, notify Unit maintenance.20. APU ENGINE STARTS, THEN STALLS OR RUNS ROUGHLYStep 1. Check for water in fuel filters.Drain filters (p. 3-44).Step 2. Check air intake filter for restrictions.Remove restrictions or clean filters (p. 3-44).Step 3. Check fuel level.If low, fill fuel tanks (p. 3-24).If condition persists, notify Unit maintenance.21. APU ENGINE IS DIFFICULT TO STARTCheck for water in fuel filters.Drain filters (p. 3-44).If condition persists, notify Unit maintenance.22. APU ENGINE IS HARD TO START IN COLD WEATHERCheck to see if plenum door in APU compartment is open.If not, open plenum door.If condition persists, notify Unit maintenance.3-11
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