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TK 56433-5-MM-EN
Figure 12.
Low Oil Pressure Flow Chart
Engine Cooling System
The engine employs a closed, circulating type,
pressurized cooling system. Correct engine
temperatures are controlled and maintained by a
radiator, fan, and thermostat. The coolant is circulated
through the system by a belt driven centrifugal pump.
The pump draws the coolant from the side of the
radiator, circulates it through the cylinder block and
head and returns it to the radiator. A thermostat
mounted in the coolant outlet line from the cylinder
head to the radiator automatically maintains coolant
temperature within the specified temperature range.
All water cooled engines are shipped from the factory
with a 50 percent permanent type antifreeze
concentrate and 50 percent water mixture in the engine
cooling system.
This provides the following:
1. Prevents freezing down to -30 F (-34 C).
2. Retards rust and mineral scale that can cause
engine overheating.
3. Retards corrosion (acid) that can attack accumulator
tanks, water tubes, radiators, and core plugs.
4. Provides lubrication for the water pump seal.
