New Holland CX720 Repair Manual page 2197

ENGINE COOLANT SYSTEM - Static description (B.50.A - C.30.A.20)
CX720, CX740, CX760, CX780, CX820, CX840
COOLING SYSTEM (New Holland 7.5 litre Engine)
The function of the water pump mounted at the front of the engine is to maintain a continuous flow of water around the
cooling system. This is essential to ensure correct engine temperature and performance during vehicle operation.
The water pump, is driven by a Poly V-belt, from the crankshaft pulley when the engine is running. The drive belt
tension is maintained by a spring-loaded belt tensioner bolted to the front cover.
The thermostats are located in the top of the housing above the water pump body and control the flow of the water as
required by temperature changes.
NOTE: A faulty thermostat may cause the engine to operate at a too hot or too cold operating temperature. If not
replaced, this could result in damage to the engine or impaired engine performance.
IMPORTANT: Do not operate an engine without a thermostat.
The cooling system is of the recirculating bypass type with full-length water jackets for each cylinder. The coolant is
drawn from the bottom of the radiator by the water pump which passes the coolant to the cylinder block. The coolant
then flows through cored passages to cool the cylinder walls.
NOTE: These engines are also fitted with an oil cooler in the circuit. Coolant from the radiator passes through the oil
cooler before entering the cylinder block.
POWER PRODUCTION - ENGINE COOLANT SYSTEM
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