General Information; Trouble Diagnosis - TGB blade 300 Service Manual

11. CRANKCASE / CRANK

General information

Operational precautions
● This Section concerns disassembly of the crankcase for repair purpose.
● Remove following components before disassembling crankcase.
－Engine remove
－Cylinder head
－Cylinder and piston
－Drive face and driven pulley
－AC generator/Start one way clutch
● In case it requires replacing the crankshaft bearing, the driving chain of engine oil pump or the timing
chain, it is preferably to replace crankshaft as a unit.
Specification
Unit: mm
Connecting rod side clearance of the big end
Crankshaft
Vertical clearance of the big end of the connecting rod
Run-out
Torque value
Bolts for crankcase
Engine oil drain bolt
Cylinder stud bolt
Tools
Special tools
L. crank shaft oil seal driver (27*42*7):

Trouble diagnosis

Engine noise
● Loose crankshaft bearing
● Loose crankshaft pin bearing
● Worn out piston pin and pin hole
11-2
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To this chapter contents
Section 5
Section 6
Section 7
Section 8
Section 10
Item
0.8~1.2kgf-m
3.5~4.5kgf-m
1.0~1.4kgf-m
TGB-440630
www.pdffactory.com
Standard Limit
0.100~0.400 0.600
0~0.008 0.050
- 0.100