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ARMY TM 9-2815-252-24 AIR FORCE TO 38G1-92-2 TABLE 3-2.  Troubleshooting Malfunction Test or Inspection Corrective Action Step 1.  Check for blocked air intake system. Remove blockege as found.  If no blockage is found, do step 2. Step 2.  Check for loss in vacuum. a.  Perform vacuum check.  Refer to paragraph 3-5.2. b.  If no loss in vacuum, do step 3. Step 3.  Engine overheated. Refer to Engine Overheating, Malfunction 7.  If not a problem, refer to Malfunction 5. 7.  ENGINE OVERHEATING. Step 1.  Inspect coolant level. a.  Check engine for coolant leaks.  If engine has no leaks, do step 2. b.  Repair coolant leaks, refer to end item maintenance manual. Step 2.  Check for defective thermostat. a.  If thermostat is suspected of being defective, replace thermostat.  Refer to paragraph 3-9. b.  If engine continues to overheat, do step 3. Step 3.  Check for defective water pump. a.  Remove and check water pump for damage.  Refer to paragraph 3-10.  If not defective, do step 4. b.  Replace defective water pump.  Refer to paragraph 3-10. Step 4.  Check improper fuel pump timing. 3-6


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