Checking The Crankshaft Journal Oil Clearance - Yamaha F80BETL Service Manual

POWR
5. Select the suitable color b for the con-
necting rod bearing from the table below
according to the calculated values.
Connecting rod bearing selection table
(20 °C [68 °F])
Connecting rod big
end inside
diameters –
crankpin diameters
(mm)
3.025–3.027
3.028–3.034
3.035–3.041
3.042–3.049
3.050–3.057
3.058–3.063
CAUTION:
The (*) mark indicates that the colors of
the upper and lower bearings are differ-
ent.
Example:
If the "Connecting rod big end inside diame-
ter a" is 47.050 mm and the "Crankpin mark"
is 92, then the "Calculated value" = 47.050 –
43.992 = 3.058 mm
Suitable colors:
Upper bearing → blue
Lower bearing → red
6. If the calculated value is more than the
maximum value (3.063 mm), replace the
connecting rod or crankshaft or both.
5-47
Power unit
b
b
S6D85710
Upper Lower
bearing bearing
Yellow Yellow
Yellow Green*
Green Green
Green Blue*
Blue Blue
Blue Red*
Checking the crankshaft journal oil
clearance
1. Clean the bearings, the crankshaft jour-
nals, the bearing portions of the crank-
case, and the cylinder block.
2. Place the cylinder block upside down on
a bench.
3. Install half of the bearings 1 and the
crankshaft into the cylinder block 2.
a
NOTE:
• Install the bearings in their original posi-
tions.
• Install the unified thrust bearing at the posi-
tion a shown.
4. Put a piece of Plastigauge (PG-1) on
each crankshaft journal parallel to the
crankshaft.
NOTE:
Do not put the Plastigauge (PG-1) over the
oil hole in the main journals of the crankshaft.
2
1
S60C5910
6D93G11