15. IMPROPER UNLOADING CAUSING SAFETY RELIEF VALVE TO OPEN

18. AIR COMPRESSOR SHUTS DOWN WITH AIR DEMAND PRESEN

TM-5-4310-451-14 Compressor Unit Reciprocating 5.0 CFM Model CAPITANO-PD Manual
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TM 5-4310-451-14 Table 4-2. Mechanical Troubleshooting (Con’t). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 4 Check for plugged oil separator element. Replace oil separator element (see paragraph 4-90). 15. IMPROPER UNLOADING CAUSING SAFETY RELIEF VALVE TO OPEN. Step 1 Check pressure regulating valve adjustment. Adjust pressure regulating valve (see paragraph 2-11). Step 2 Check for blocked pressure regulating valve Inlet. Remove and clean pressure regulating valve (see paragraph 4-87). Step 3 Check for defective blowdown valve, Replace blowdown valve (see paragraph 4-88). Step 4 Check for plugged element in oil separator. Replace oil separator element (see paragraph 4-90). Step 5 Check for defective pressure regulating valve. Replace pressure regulating valve (see paragraph 4-87). Step 6 Check for jammed governor and sullicon control linkage. Notify Direct Support Maintenance. Step 7 Check for restrictions in sullicon control system lines. Clear restrictions or replace lines (see paragraph 4-40). 16. START PRESSURE TOO HIGH. Step 1 Check for blocked pressure regulating valve inlet. Remove and clean pressure regulating valve (see paragraph 4-87). Step 2 Check for defective blowdown valve. Replace blowdown valve (see paragraph 4-88). 17. EXCESSIVE VIBRATION. Step 1 Check for loose fan hub. Tighten fan hub (see paragraph 4-48). Step 2 Check for collapsed, torn, or loose engine motor mounts. Notify Direct Support Maintenance. 4-12

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