wsm L3301 Workshop Manual page 237

L3301, L3901, L4701, WSM
Crankshaft Bend
1. Hold the 2 end journals of crankshaft with V blocks on the
surface plate.
2. Set a dial indicator with its point on the middle journal.
3. Turn the crankshaft slowly and read the variation on the
indicator.
4. If the measurement is more than the allowable limit, replace the
crankshaft.
Crankshaft bend Allowable limit
Oil Clearance between Crankpin and Crankpin Bearing
1. Clean the crankpin and crankpin bearing.
2. Put a strip of plastigauge on the center of the crankpin.
3. Install the connecting rod cap and tighten the connecting rod
screws to the specified torque, and remove the cap again.
4. Measure the width that it becomes flat with the scale to get the
oil clearance.
5. If the oil clearance is more than the allowable limit, replace the
crankpin bearing.
6. If the same dimension bearing is not applicable because of the
crankpin wear, replace it with an undersize one. Refer to the
table and figure.
NOTE
• Do not put the plastigauge into the crankpin oil hole.
• When you tighten the connecting rod screws, do not move
the crankshaft.
Factory specification
Oil clearance between
crankpin and crankpin
bearing
Allowable limit
Crankpin O.D. Factory specification
Crankpin bearing I.D. Factory specification
(Reference)
• Undersize dimensions of crankpin
0.2 mm
Undersize
0.008 in.
3.3 to 3.7 mm radius
Dimension A
0.13 to 0.14 in. radius
1.0 to 1.5 mm relief
*Dimension B
0.040 to 0.059 in. relief
46.759 to 46.775 mm dia.
Dimension C
1.8409 to 1.8415 in. dia.
The crankpin must be fine-finished to higher than Rmax = 0.4S
*Holes to be de-burred and edges rounded with 1.0 to 1.5 mm
(0.040 to 0.059 in.) relief.
1-S74
ENGINE
0.03 mm
0.001 in.
9Y1211012ENS0100US0
0.025 to 0.087 mm
0.00099 to 0.0034 in.
0.20 mm
0.0079 in.
46.959 to 46.975 mm
1.8488 to 1.8494 in.
47.000 to 47.046 mm
1.8504 to 1.8522 in.
0.4 mm
0.02 in.
3.3 to 3.7 mm radius
0.13 to 0.14 in. radius
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
46.559 to 46.575 mm dia.
1.8331 to 1.8336 in. dia.
9Y1211012ENS0101US0
KiSC issued 09, 2016 A