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COOLING SYSTEM TROUBLESHOOTING
WARNING - TM-9-2320-366-34-1_191

TM-9-2320-366-34-1 M1078 Series 2 1/2-Ton 4x4 Light Medium Tactical Vehicles (LMTV) Manual
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TM 9-2320-366-34-1 2-68 b1.  ENGINE OVERHEATS START NO YES Is the fuel setting screw adjusted properly? Refer to para 4-4. 1. Incorrect fuel setting. Improperly timed injectors. Faulty cylinder head and/or engine block. Improperly timed injectors. Faulty cylinder head and/or engine block. Refer to para 4-5. Are injectors properly timed? YES NO Improperly timed injectors can cause engine to overheat. 2. KNOWN INFO POSSIBLE PROBLEMS WARNING Read WARNING on following page. TEST OPTIONS REASON FOR QUESTION Adjust fuel setting screw (para 4-4). KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Adjust fuel timing (para 4-5). Engine oil level OK. Water temperature gage OK. Coolant level OK. Radiator core free of debris. Upper and lower radiator hoses OK. Radiator cap OK. Radiator overflow tank and hoses OK. Radiator OK. Fan shroud OK. Charge air cooler OK. Cylinder head and engine block OK. Engine oil level OK. Water temperature gage OK. Coolant level OK. Radiator core free of debris. Upper and lower radiator hoses OK. Radiator cap OK. Radiator overflow tank and hoses OK. Radiator OK. Fan shroud OK. Charge air cooler OK. Fuel setting OK. Improperly adjusted fuel setting screw can cause engine to overheat. INITIAL SETUP   Equipment Conditions     Engine shut down (TM 9-2320-366-10-1).     Cab raised (TM 9-2320-366-10-1). Tools and Special Tools   Tool Kit, Genl Mech (Item 78, Appendix B)   Tool Kit, Intl Comb Eng (TM 9-2320-366-20)   Wrench, Torque, 0-60 N·m (Item 96, Appendix B)







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