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Page Title: 3. BLOWN VALVE PLATE OR CYLINDER HEAD GASKETS.
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ARMY TM 9-4120-381-14 NAVY EE-000-CA-MMA-010/7053-AC AIR FORCE TO 35E9-136-31 Table 5-1.  Direct Support Troubleshooting - Continued MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3.  BLOWN VALVE PLATE OR CYLINDER HEAD GASKETS. Step 1.  Cylinder head bolts not properly torqued. a. Replace cylinder head gasket (para 5-47). b. Retorque cylinder head bolts to 30-35 lb-ft. Step 2.  Liquid refrigerant floodback or flooded start.  See malfunction 7. 4.  COMPRESSOR CYCLES ON LOW-PRESSURE CONTROL. Step 1.  Low refrigerant pressure switch erratic in operation. a. Check tubing to switch to see if clogged or crimped (para 5-24). b. Check switch setting (para 5-24). Step 2.  Insufficient refrigerant in system. Add refrigerant (para 5-17). Step 3.  Suction service valve closed. Backseat (counterclockwise) suction service valve (para 5-34). Step 4.  Restricted air flow through condenser. Clean condenser (para 4-90). Step 5.  Discharge service valve not fully open. Backseat (counterclockwise) discharge service valve (para 5-33). Step 6.  Air in system. Purge refrigerant system (para 5-13). 5.  COMPRESSOR CONTINUALLY CYCLES. Step 1.  Faulty high refrigerant pressure switch. Adjust or replace switch (para 5-23). Step 2.  Faulty low refrigerant pressure switch. Adjust or replace switch (para 5-24). Step 3.  Faulty low oil pressure switch. Adjust or replace switch (para 5-25). Step 4.  Condenser capacity reduced by refrigerant overcharge accompanied by high discharge pressure. Remove overcharge (para 5-17). Step 5.  Plugged drier filter. Replace drier filter (para 5-26). 5-3

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