TM 5-4310-452-14Table 4-2. Mechanical Troubleshooting Procedures (Con't).MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION6. SURGES WHEN RUNNING.Step 1. Check to see if regulating valve is restricted.Replace regulating valve (see paragraph 4-94).Step 2. Check for tension on engine speed control inner spring.Adjust throttle control (see paragraph 4-25).Step 3. Check to see if engine speed control springs are broken, Replace throttle control (see paragraph4-25).7. WILL NOT RUN AT CORRECT SPEED.Step 1. Check to see if fuel filter is clogged.Clean or change fuel filter element (see paragraph 4-26).Step 2. Check to see if engine air cleaner filter is clogged.Clean or change engine air cleaner filter (see paragraph 4-16).Step 3. Check to see if pressure regulator is set too low.Adjust throttle control (see paragraph 4-25).____________________________________________________________COMPRESSOR1. BLOWDOWN VALVE OPERATES ERRATICALLY.Step 1. Check for defective blowdown valve diaphragm.Replace blowdown valve (see paragraph 4-95).Step 2. Check for dirty blowdown valve.Inspect and clean blowdown valve.2. EXCESSIVE OIL CARRYOVER.Step 1. Check for clogged oil scavenger line.Remove and clean oil scavenger line (see paragraph 4-86).Step 2. Check for oil carryover into discharge line.Replace oil separator filter element (see paragraph 4-87).4-12
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