TM 9-2320-289-20Table 2-3. Mechanical Troubleshooting (Con’t)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONWARNINGDiesel fuel is flammable. When disconnecting fuel lines to test fuel flow,direct fuel spray away from source of ignition. A fire extinguisher must beon hand in work area. Failure to follow this warning may result in seriousinjury or death to personnel.Step 3.If troubleshooting cargo compartment heater malfunction, remove heater cover.Disconnect fuel line from inlet side of heater. Place a suitable container under inletline. Check for fuel flow to heater while holding run-start switch in “START” position(all except engine coolant heater) or on-off switch in “ON” position (engine coolantheater only).If fuel flow is evident, replace heater, (See paragraph 11-8 or 11-21)If fuel flow is not evident, perform step 4.Step 4.Check for restrictions in heater inlet fuel line.If line is restricted, clear restrictions.Step 5.Perform Electrical Troubleshooting malfunction #22.HEATER (ENGINE COOLANT ONLY)38. FAN RUNS CONTINUALLY WITH SWITCH OFF; RUN LAMP STAYS ON; NO HEAT PRODUCEDStep 1.Replace heater. (See paragraph 11-16)39. HEATER OPERATES; ENGINE REMAINS COLDStep 1.Check to see if coolant shutoff valves are open.Step 2.Replace40. WILL NOT STARTStep 1.Performheater. (See paragraph 11-16)Electrical Troubleshooting malfunction #22.2-50
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