TGB 11. CRANKCASE/CRANKSHAFT
11-1
OPERATIONAL PRECAUTIONS
... 11-1
TROUBLE DIAGNOSIS
................ 11-1
DISASSEMBLY OF CRANKCASE
. 11-2
CRANKSHAFT INSPECTION
....... 11-4
ASSEMBLY OF CRANKCASE
..... 11-5
OPERATIONAL PRECAUTIONS
General Information
z
This Section contains descriptions concerning disassembly of the crankcase so that the
crankshaft can be serviced.
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Complete following operations before disassembling crankcase.
Engine Chapter
5
Cylinder head
Chapter 6
Cylinder and piston
Chapter 7
V-belt Drive pulley
Chapter 8
AC generator/ Starting Clutch
Chapter 10
If the crankshaft bearing or timing sprocket need be replaced, then the crankshaft set have to
replaced.
Specification
Unit:
mm
Item Standard
Limit
Left, right clearance of the big end of the connecting rod
0.100~0.350 0.550
Radial clearance of the big end of the connecting rod
0.000~0.008 0.050
Run-out
─
Below 0.030
Torque value
Bolts for crankcase
0.8~1.2 kgf-m
Bolts for cylinder/cylinder head
0.7~1.0 kgf-m
Engine oil draining plug
3.5~4.5 kgf-m
Bolts for cam chain tensioner
0.8~1.2 kgf-m
Special Service Tools
Crankcase remover/set
Crankshaft installation puller
Inner type bearing puller
Outer type bearing puller
Bearing pressing tools
Oil seal pressing tools
TROUBLE DIAGNOSIS
Engine noise
•
Loose crankshaft bearing
•
Loose crankshaft pin bearing
•
Wear piston pin or piston pin hole