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Figure 1-11.   Fuel System (Cont)
Figure 1-12.   Cooling System (Cont) - TM-9-2320-365-10_71

/.5tonv1-2/TM-9-2320-365-10 Palletized Load System Model M1074/M1075 NSN 2320-01-304-2277 2320-01-304-2278 Manual
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TM 9-2320-365-10 1-17.   COOLING SYSTEM Figure 1-12.   Cooling System The Cooling System protects the engine, transmission, and air compressor by providing a means of removing the heat generated during operation of the vehicle. (1)   The radiator pressure cap (1, Figure 1-12), in combination with the ethylene glycol- based antifreeze, effectively raises the boiling point of the coolant to well above 212F (100C). (2)   The thermostat (2) helps the engine to warm up quickly by remaining closed until the  coolant  temperature  reaches  approximately  199F  (93C). When  the  coolant temperature reaches approximately 199F (93C), the thermostat opens and coolant is circulated  through  the  water  jacket  in  the  engine  to  maintain  the  correct  operating temperature  for  the  engine. Coolant  is  drawn  from  the  radiator  (3),  through  the transmission oil cooler (4), and circulated through the cooling system by the water pump (5).    Heat  is  drawn  from  the  radiator  by  the  engine  fan  pulling  air  over  the  radiator cooling fins. (3)   A radiator overflow tank (6) is provided to allow for expansion of the coolant.   The radiator overflow tank also serves as the point where new coolant is introduced into the cooling system.  The radiator overflow tank has two sight glasses; the upper sight glass (7) indicates the level to fill to with engine shut down.  If coolant is not visible in the lower sight glass (8), do not operate the vehicle. 1-37







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