Engine Oiling System - Joyner JNSZ1600QL Owner's Manual

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. Engine oiling system:

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1). The description of the oiling system:
Through oil collector (2), the rotary oil pump (1) which is installed in the front end of crankshaft draws
oil from oil pan (3) and pressurizes. The pressure oil comes into the full flow type oil filter through the
assistant oil passage (4) on the left of cylinder body (viewed from the front). The pressure relief valve (6) is
installed inside the oil pump case to control main oil passage pressure. The pressure relief valve will be
opened under the pressure within 440kPa
filter and comes into the main oil passage of engine (5) through the center hole of filter connector.
From the main oil passage, oil lubricates the main bearing through the bore in the cylinder body and
lubricates the connecting rod bearing through oil passage in the crankshaft.
There is a small oil port in the connecting rod bearing bore near the exhaust side in the connecting rod
body. The oil sprays out from this small oil port to lubricate the piston pin and cylinder bore.
Oil pressure sensor (8) is located near the oil filter. It is connected with the main oil passage by a inner
oil passage. Oil is provided to the third journal of camshaft through this oil passage.
Other journals of camshaft are lubricated by the oil provided by the middle oil passage of camshaft. Two
sides of the middle oil passage are sealed by steel ball.
Hydraulic lifter oil comes from oil gallery on cylinder head, which is supplied from oil channel on
camshaft neck The oil provided by the oil port inside the hydraulic valve lifting rod lubricates the contact
face of valve rocker and
hydraulic valve lifting rod. The oil to lubricate the rocker carrier is provided by the oil passage of cylinder
head. The contact face of the tip end of valve and rocker is lubricated by splashing.
±
2 0kPa. The filtered oil comes out from the center hole of oil
Fig.96 Fig.97
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