D439E Service Manual 2. Engine Mechanical System (D439E)
101
Lubrication System
Description
Flow Chart of Lubrication System
Engine is lubricated by a gear-type oil pump that
forces engine oil through the oil cooler and oil filter
into the engine for lubrication of various engine parts.
Oil Pump
The oil pump, of a gear type, is driven by the
crankshaft rotation engaged with oil pump gear. And
the relief valve is in stalled to the oil pump so that it
prevents the excessive pressure by bypassing the
engine oil to oil pan when the oil pressure exceeds
the specification.
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