Direct Support Mechanical Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION COOLING SYSTEM WARNING Hot coolant is under pressure. Care should be used when removing surge tank filler cap or inspecting hot engine coolant leaks. Steam or hot coolant under pressure may cause severe injury to personnel. Wear hand protection at all times when working with heated parts. Failure to do so may result in injury to personnel. 20. COOLANT LOSS DURING NORMAL OPERATION Perform malfunction 10. END OF TESTING! 21. COOLANT TEMPERATURE EXCESSIVE Step 1. Fuel setting is too high. Adjust fuel setting as necessary (WP 0323 00). Step 2. Check fuel injection timing. Adjust timing as necessary (WP 0322 00). END OF TESTING! TRANSMISSION 22. TRANSMISSION SHIFTS OCCUR AT TOO HIGH OR TOO LOW A SPEED Step 1. Check modulator valve for sticking valve and actuator rod. a. Remove modulator valve (notify GS maintenance). Clean valve and actuator rod. b. Replace modulator valve if valve or actuator rod is defective. Step 2. Replace control valve (notify GS maintenance) if condition continues. END OF TESTING! 23. TRANSMISSION SHIFTS SLOWLY OR FAILS TO ENGAGE Perform malfunction 22. END OF TESTING! 24. CLUTCH SLIPPAGE IN ALL FORWARD AND/OR REVERSE GEARS Step 1. Check engine idle speed. Adjust idle speed, if necessary. Step 2. Remove control valve (notify GS maintenance) and check for sticking valves. Replace control valve if valve(s) are sticking (notify GS maintenance). Step 3. Remove and rebuild oil pump (notify GS maintenance). Step 4. Remove and rebuild each forward and reverse gear clutch (notify GS maintenance). END OF TESTING! 25. EXCESSIVE VEHICLE CREEP IN FIRST AND REVERSE GEARS Perform malfunction 24. END OF TESTING! TM 9-2320-386-24-1-2 0293 00 0293 00-7