
TM 10-3930-660-10
0003 00-2
THEORY OF OPERATION - CONTINUED 0003 00
ENGINE LUBRICATION AND COOLING SYSTEMS
1. Oil Pump
. Located on the front housing cover side. The pump draws oil from the oil pan and sends it through the oil
cooler, and then through the oil filter. From the filter, the oil enters the cylinder block to lubricate the engine and is
then returned to the oil pan. From the filter, oil is also sent through the turbocharger and then returned to the oil pan.
2. Oil Pan
. Contains the oil that lubricates moving parts in the engine. It is attached to the bottom of the engine.
3. Engine Oil Cooler
. Engine oil flows through the plates of the oil cooler. As the oil warms, the heat is transferred to
the coolant which flows from the radiator. The coolant flows across the plates of the oil cooler.
4. Oil Filter
. Removes particles from the oil which could cause damage to the internal parts of the engine.
5. Water Pump
. Draws coolant from the radiator and sends it through the oil cooler cavity and cylinder block to cool
the engine. The coolant then returns to the radiator.
6. Fan
. The fan is turned by the engine drive belt. It creates air flow through the radiator to lower the temperature of the
coolant as it passes through the radiator.
7. Radiator
. The 6K forklift cooling system uses an overflow system. The system is full when 2 qt (1.8 L) of coolant
are visible in the overflow bottle. Coolant circulates through the radiator to be cooled after leaving the cylinder block.
409-004
FAN
RADIATOR/
TRANSMISSION
OIL COOLER
OIL FILTER
ENGINE OIL
COOLER
OIL PAN
OIL PUMP
WATER PUMP
TRANSMISSION
OIL FILTER
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