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Chapter 5 CRANK CASE & CRANK SHAFT
Attention of Operation
This chapter explaining the necessary procedure of disassembling crank case due to
repair & maintain the crank shaft.
Before disassembling of crank case, please refer related articles of following
procedures.
–Disassembly of oil pump
–Disassembly of carburetor
–Disassembly of reed valve
–Removal of engine
–Disassembly of cylinder head and cylinder
–Disassembly of ACG
–Disassembly drive face ass’y
Must disassembly of final reduction mechanism when change the left crank
case.
Must use special tool into the inner ring of crank shaft bearing , and pull in crank
shaft to assembly when assembly crank case & crank shaft , put new bearing into
crank case, and put into new oil seal after assembling crank case.
Diagnosis of Troubles
Noise of Engine
Damaged of the crankshaft bearing.
Damaged of needle bearing of connecting rod.
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