Yamaha VMX12H, Дополнительное руководство по обслуживанию

Страница: 14 / 405

INSPECTION AND REPAIR
ENGINE OVERHAUL
INSPECTION AND REPAIR
CRANKSHAFT AND CONNECTING ROD
1.Measure:
Runout (crankshaft)
Out
of specification Replace.
Runout:
Less than 0.03 mm (0.0012 in)
2.1nspect:
Main journal surfaces
Crank pin surfaces
Bearing surfaces
Wear/Scratches Replace.
3. Measure:
Oil clearance (main journal)
Out of specification
Replace bearing.
0.020 ~ 0.038 mm
(0.0008 ~ 0.0015 in)
Measurement steps:
Do not interchange the bearings and con-
necting rod. They must be installed in their
original positions, or the correct oil clear-
ance may not be obtained causing engine
damage.
the bearings, main journals and
bearing portions of the crankcase.
the crankcase (upper) on a bench in
an upside down position.
the
upper
half
of the
bearings
and
the crankshaft into the crankcase (upper).
Align the projection of the bearing with the
notch in the crankcase.
NOTE:
- 7 -