Lu b r i c a t e
Here are main functions for engin oil.
1、 Lubricate……reduce friction with metal
2、 Cooling……prevent too hot
3、 Anti-dust……prevent rusting
4、 Clear……prevent deposit and clear carbon deposit
5、 Seal intermediate……seal combustion chamber
6、 Anti-abrision……prolong accessory’s life span
There are modes of wet groove, splash, pressure to lubricate engine.
Engine oil cycle
Oil pump assembled in right crankcase absorbs oil through main gears on right crankshaft. Oil in crankcase is filtrated
throutgh the oil filter core of left crankcase, then flows across oil pump rotor where prodeces large pressure, and then the oil is
squashed into oil path of side cavity of right crankcase , where oil is detached into three roads to lubricate engine:：
A：On the first road, oil goes into the oil road of right crankcase cover, then flows across vitta of filter rotor cover assy., and
then goes into oil filter rotor cover, flows out of rotor cover, then flows into the hole of right crankshaft axes, then
oil hole of crankcas axes core and reaches to connecting big rod, where lubricates the big rod and crankpin.
Finally oil flows bacd crankcase.
B：On the second road, oil goes into small oil hole in the side of right crankcase double-head bolt hole, then goes up along
double-head bolt hole and flows into oil path hole of cylinder head cover, oil splashes out from the two oil holes on
cylinder head cover, and lubricates rocker arm and rocker shaft, then flows back crankcase along two pushing lever hole.
C：On the third road, oil passes through small hole on right crankcase and flows into side oil cavity on right crankcase, after
Oil reaches here, and then oil road becomes two roads to luricate principal axis and countershaft.：
C1：On the first spur track, oil passes through the oil path on right crankcase to reach bush for right crankcase countershaft,
flow across small hole of bush, then goes into axial hole of countershaft and through several small holes of
countershaft where lubricates gears. Finally oil flows back crankcase.
C2：On the second spur track, oil goes into oil path on left crankcase to reach bearing of left crankcase principal axis, then
flows into axial hole of principal shaft and through several small holes on principal axis, where lubricates gears of
principal axis. Finally oil flows back crankcase.
For some part of crankshaft is dipped in oil, when crankshaft rotates at high speed, oil may splash around, some oil
lubricates piston skirted and cylinder arm, and other oil spashes on piston lumen and passes across small holes on piston
and connecting small rod, where lubricates connecting small hole and piston pin.
For clutch assy., kicking starter assy, gearshift organ assy. etc., a small proportion or the whole is dipped in engine oil to
lubricate.。
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