TM-9-2350-274-BD M109 Battlefield Damage Assessment and Repair Download
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TM 9-2350-274-BD CHAPTER 5 COOLING SYSTEM BDAR FIXES SHALL BE USED ONLY IN COMBAT AT THE DISCRETION OF THE COMMANDER AND SHALL BE REPAIRED BY STANDARD MAINTENANCE PROCEDURES AS SOON AS PRACTICABLE AFTER THE MISSION IS COMPLETED. SECTION L General 5-1. General. The M 109 has a liquid cooling system consisting of a radiator and two fans located to the rear of the engine. Air is drawn in through an air inlet grille, located immediately in front of the cab. The air passes over the top of the engine, through the fans and radiator, curves 90 degrees and is discharged ■ through the exhaust grille. Coolant flow is regulated by two thermostats, an inlet and a by-pass thermostat. The M 110 series/M578 has two radiators and a fan that forces air through the power plant compartment and the radiators to cool the engine. Cooling system problems may be indicated by a variety of faults. Typically, the driver’s indicator panel will show overheating. However, sporadic overheating or constant high temperature indications may indicate an impending major cooling system problem. 5-2. Assessment Procedure. -fans, . . . . . . . . . . . . . . . . . . . . . . . . go to para 5-4 -fan drive, . . . . . . . . . . . . . . . . . . . . . go to para 5-4 -shroud . . . . . . . . . . . . . . . . . . . . . . . go to TM 9-2350-276-BD -ducts . . . . . . . . . . . . . . . . . . . . . . . . go to TM 9-2350-276-BD -engine compartment . . . . . . . . . , . . . go to TM 9-2350-276-BD covers -radiator, . . . . . . . . . . . . . . . . . . . . . go to TM 9-2350-276-BD -hoses, . . . . . . . . . . . . . . . . . . . . . . . go to TM 9-2350-276-BD -fan air intake, . . . . . . . . . . . . . . . . . . go to para 5-4 -fan drive, . . . . . . . . . . . . . . . . . . . . . go to para 5-4 -engine compartment . . . . . . . . . . . . . go to TM 9-2350-276-BD covers -engine compartment . . . . . . . . . . . . . go to TM 9-2350-276-BD seals Change 3 5-1