ORGANIZATIONAL TROUBLESHOOTING - continued

TM 9-2320-269-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

COOLING SYSTEM - CONTINUED

LOSES COOLANT OR OVERHEATS - CONTINUED

Step 2. Test coolant for proper protection limit.

NOTE

Before using antifreeze tester, clean window and cover with water, and dry to insure

correct reading.

a. Open hood panels (1) (page 2-7).

b. Unscrew surge tank cap (2), and test coolant protection limit (TM 750-254).

c. If limit is low, drain the system and fill with new antifreeze and water mix (page

Step 3. Testing cooling system pressure.

a. Connect cooling system tester to surge tank (3) and pump up to 17-20 psi (117-

137 kPa).

b. If pressure holds, release pressure, disconnect tester, screw on surge tank cap

(2), and go to step 5.

Step 4. Test cooling system for leaks under pressure.

a. Have assistant pump cooling system tester to 17-20 psi (117-137 kPa), and

keep the pressure built up.

b. If water pump, gasket (4), or engine (5) leak coolant, release pressure and

disconnect tester. Screw on radiator cap (2), and notify Direct Suppport

Maintenance.

c. If surge tank (3) leaks, replace (page 2-223).

d. If the coolant hoses (6) show signs of cracks, leaks, or bulges, replace (page 2-

247).

2-72

Index