TM 9-2350-247-10 TROUBLESHOOTING TABLE—Continued 0056 00 MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 6.     ENGINE OVERHEATS. CAUTION Driving carrier with an overheated engine can damage engine. When ENGINE COOLANT TEMPERATURE GAUGE indicates above 230 F (110 C), stop carrier and run engine at 1000 to 1200 rpm until coolant temperature drops below 230 F (110 C). 1.     Is engine hard running in hot weather? Follow the precautions for driving in extreme heat (WP 0046 00). When engine overheats, stop carrier and run engine at 1000 to 1200 rpm until coolant temperature drops below 230 F (110 C). 2.     Check if coolant level is low. Add coolant as needed (WP 0065 00), (WP 0066 00). Check for coolant leaks. If you find any leaks, notify unit maintenance. 3.     Check if radiator cap is not sealed right. Make sure the cap is on straight and tight (WP 0065 00), (WP 0066 00). If cap is damaged or seal is broken, notify unit maintenance. 4.     Check if there is enough air moving through intake grille and radiator. Remove any debris from intake grille, exhaust grille, and radiator fins. 5.     Check if coolant fan (M548A1) is working right. Look for loose or broken fan belts (WP 0067 00). If any belt is broken, worn, or loose, notify unit maintenance. 6.     Check coolant fan drive system (M548A3). Stop engine (WP 0024 00). Remove power plant rear access panel (WP 0036 00). If coolant fan belt is loose or missing, do not operate carrier. Notify unit maintenance. Install rear power plant access panel (WP 0036 00). Start engine (WP 0014 00). Drive carrier under similar condition of reported overheat. If engine overheats, stop engine immediately (WP 0024 00). Notify unit maintenance. 7.     Check if engine oil level is low. Add oil as needed (WP 0057 00). 0056 00-11