Generic Trigger SM 50ccm, Owner'S Manual

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9 Lubrication system
Preparation data -----------9.1
Fault diagnosis -----------9.2
Oil pump -------------9.3
9.1 Preparation data
Matters needing attention in operation
The operation of engine in this chapter can be conducted on the motorcycle body.
When disassembling the oil pump, see to it that no foreign objects could enter into the engine.
After installation of oil pump, inspect whether machine oil leaks in each part.
Function of the lubrication system ： supplying lubricating oil to the wear surface to reduce part wear by turning dry
friction between surfaces into liquid friction between lubricating oil particles ； cooling high-load parts ； absorbing
impact from the bearing and other parts and reducing noises ； increasing air tightness between the piston ring and
cylinder wall
；
cleaning and carrying away impurities on part surfaces.
9.2 Fault diagnosis
Decrease of machine oil Engine burnt out
Natural loss of machine oil Absence of oil or oil pressure too low
Machine oil leak Oil path blocked
Wear and improper installation of the piston ring Machine oil not used
9.3 Oil pump
9.3.1 Disassembly
Pull out the inlet and outlet oil tube, unscrew the bolt
and disassemble the right cover.
inlet and outlet
oil tube
right cover
bolt