Before you use the troubleshooting tables, be sure you have performed all applicable operating
checks and verified that a malfunction exists. When a corrective action is performed, verify that
the action has corrected the malfunction.
Table 5-1. Direct Support Troubleshooting Chart
TEST OR INSPECTION
ENGINE COOLING SYSTEM
1. ENGINE COOLANT OVERHEATING.
Step 1. Inspect pressure cap for proper seal.
Replace pressure cap.
Step 2. Check coolant level.
Fill cooling system to proper level (paragraph 4-72).
Step 3. Check for loose or worn fan belt.
Replace worn fan belt. Tighten fan belt (paragraph 4-76).
Step 4. Check for damaged coolant hoses.
Replace coolant hoses (paragraph 4-20).
Step 5. Check for damaged or inoperative thermostat.
Replace thermostat (paragraph 4-79).
Step 6. Check for scale or deposits in cooling system.
Clean and flush cooling system (paragraph 4-72).
Step 7. Check for damaged radiator.
Replace radiator (paragraph -81).
2. ENGINE COOLANT LOSS.
Visually inspect hoses, radiator, clamps, water pump, thermostat housing,
radiator drain, engine soft plugs for leakage.
Tighten connections as necessary.