TM 9-2330-390-14&PTable 4-2. Unit Troubleshooting (Con't).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION23. ENGINE RUNS ROUGH (MISFIRES).Step 1.Check for fuel leakage or air in fuel system due to loose injection pipe nuts (see paragraph 4-122).Tighten nuts at both ends of injection pipe. Replace damaged injection pipe (seeparagraph 4-122).Step 2.Check for clogged or dirty fuel filter (see paragraph 4-124).Clean or replace damaged fuel filter (see paragraph 4-124).Step 3.Check for clogged overflow hose (see paragraph 4-122).Step 4.Remove and inspect nozzle holder for clogging or damage (see paragraph 4-121).Clean or replace damaged overflow hose (see paragraph 4-122).Replace damaged nozzle holder (see paragraph 4-121).Replace damaged injection pump (see paragraph 4-120).24. ENGINE DOES NOT DEVELOP FULL POWER.Compressed air used for cleaning or drying purposes, or for clearing restrictions,should never exceed 30 pal (207 kPa). Wear protective clothing (goggles/shield,gloves, etc.) and use caution to avoid Injury to personnel.Step 1.Remove oil cooler cover (see paragraph 4-117). Check for clogged oil cooler fins.Oil cooler fins are fragile. DO NOT use a tool to remove dirt and obstructions ordamage will result.Clear oil cooler fins of dirt or obstructions with compressed air.Step 2.Remove cylinder cowling and spiral case (see paragraph 4-128). Check for clogged cylindercowling and dirt or debris around flywheel.Clear cylinder cowling and area around flywheel of dirt or debris with compressed air.4-45
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