ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
COOLING SYSTEM - CONTINUED
LOSES COOLANT OR OVERHEATS - CONTINUED
Step 2. Test coolant for proper protection limit.
Before using antifreeze tester, clean window and cover with water, and dry to insure
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-
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
d. If the coolant hoses (6) show signs of cracks, leaks, or bulges, replace (page 2-