TM 9-2350-261-10MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONStep 3.ENGINE (cont)Drain primary and secondary fuel filters (page 3-48).High elevation operation.The carrier will normally lose power at high elevations(mountain passes or high plateaus). If carrier runs rough orhas a power loss, push air control valve in (page 2-177) todraw cooler air from rear compartment and increasehorsepower.If carrier runs rough or without much power, notify unitmaintenance.6. ENGINE OVERHEATS.step 1.step 2.step 3.step 4.Step 5.CAUTIONDriving carrier with an overheated engine can damage engine.When ENGINE COOLANT TEMPERATURE GAGE indicatesabove 230°F (110°C), stop carrier and run engine at 1000 to1200 rpm until coolant temperature drops below 230°F(110°C).Check to see if all power plant access panels are in place andmounting clamps are tight. Install panels(pages 2-219 and 2-220).Hard running in hot weather.Follow the precautions for driving in extreme heat(page 2-241). When engine overheats, stop carrier and runengine at 1000 to 1200 rpm until coolant temperature dropsbelow 230°F (110°C).Check to see if coolant level is low. Add coolant as needed(page 3-43). Check for coolant leaks. If you find any leaks,notify unit maintenance.Check to see if radiator cap is sealed right.Make sure the cap is on straight and tight (page 3-43). If capis damaged or seal is broken, notify unit maintenance.Check to see if there is enough air moving through intakegrill and radiator.3-7
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