TM 9-2320-289-34Table 2-1. Mechanical Troubleshooting (Con’t)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONWARNINGUse extreme caution to ensure that clothing or tools DO NOT get caught intruck’s operating drivebelts. Failure to follow this warning may result inserious injury to personnel or equipment damage.Step 3.Start engine, Depress bottom of rocker lever on right side of fuel injector pump.If engine sound doesn’t change, remove and inspect fuel injector pumpservo advance piston assembly. (See paragraph 3-40)Step 4.Start engine. Loosen fuel injector line fitting at any fuel injector nozzle until fuelstarts to come from fitting.If there is no engine rpm drop, test fuel injector nozzle. (See paragraph 3-36)If there is engine rpm drop, tighten fitting to 20 Ib. -ft. (27 N.m) with crowfootattachment J-29698-A and repeat check for each fuel injector nozzle.21. IDLES ROUGH WITHOUT ABNORMAL NOISE OR SMOKE, WILL NOT CLEAR UPStep 1.Check fuel injector pump timing. (See paragraph 3-44)Step 2.Test each fuel injector nozzle. (See paragraph 3-36)Step 3.Remove governor cover. (See paragraph 3-38) Check for black particles.If black particles are evident, replace governor weight retaining ring. (Seeparagraph 3-42)Step 4.Test fuel injector pump, (See paragraph 3-44)Step 5.Test compression of each cylinder. (See paragraph 3-2)22. STARTS BUT WILL NOT CONTINUE TO RUN AT IDLEStep 1.Check fuel injector pump timing. (See paragraph 3-44)Step 2.Have assistant start engine. Check fast idle solenoid to see if solenoid holds fuelinjector pump lever in fast idle position.If fast idle solenoid does not operate properly, perform ElectricalTroubleshooting malfunction #7.Step 3.Test each fuel injector nozzle. (See paragraph 3-36)Step 4.Test fuel injector pump, (See paragraph 3-44)Step 5.Test compression of each cylinder. (See paragraph 3-2)2-18
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