HER CHEE ATV-90 - Crank Case; Crank Shaft

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1
Crank Case / Crank Shaft
Attention of Operation
z This chapter explain the necessary procedure of disassembling crank case due to
repair & maintain the crank shaft.
z Before disassembling of crank case , must operation with sequence of each
chapter to disassembly.
–Disassembly of oil pump
–Disassembly of carburetor
–Disassembly of intake valve
–Dis-mounting of engine
–Disassembly of cylinder head and cylinder
–Disassembly of ACG
–Disassembly drive face ass’y
z Must disassembly of final reduction mechanism when change the left crank case.
z 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
z Damage of crankshaft bearing.
z Damage of needle bearing of crankshaft pin.