Direct Support Mechanical Troubleshooting - continued

TM 9-2320-386-24-1-2

0293 00

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!