ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
Table 4-3. Unit Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
17. COOLANT TEMPERATURE TOO HIGH (CONTINUED).
Step 4. Check for external leaks or air in system. Check all hoses, connections, gaskets, and pressure cap.
Repair or replace as necessary.
Step 5. Check radiator louver position.
Open all radiator louvers to increase air flow.
Step 6. Check crankcase oil level and grade.
Add oil if low. Use proper grade for weather conditions.
Step 7. Check for defective gage and sender.
Replace If defective.
18. OIL TEMPERATURE TOO HIGH.
Step 1. Check oil level.
If low, check for leaks and add oil. If high, drain excess oil.
Step 2. Troubleshoot in accordance with MALFUNCTION 14, above.
Step 3. Excessive load on engine.
Reduce load.
Step 4, Check for defective gage and sender
Replace If defective.
19. FUEL KNOCKS (COMBUSTION NOISE).
Step 1. Check for possible improper use of starting aid.
Use starting aid properly.
Step 2. Check fuel quality.
Use only specified fuel.
Step 3. Check fuel lines for breaks and inspect all fuel connections for air leaks.
Repair as necessary.
Step 4. Check for low coolant temperature.
See MALFUNCTION 16, above.
Step 5. Check for engine overload.
Reduce load.
Step 6. Check valve adjustment or Injector timing. Refer to paragraph 4-81.
Adjust valves and injector timing.
4-30
