Kubota M6800S Workshop Manual page 143

M6800 · M6800S · M8200 · M9000, WSM
Oil Clearance between Crankpin and Crankpin Bearing
1. Clean the crankpin and crankpin bearing.
2. Put a strip of plastigage (Code No. 07909-30241) 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 amount of the flattening with the scale, and get the
oil clearance.
5. If the oil clearance exceeds the allowable limit, replace the
crankpin bearing.
6. If the same size bearing is useless because of the crankpin wear,
replace it with an undersize one referring to the table and figure.
NOTE
• Never insert the plastigage into the crankpin oil hole.
• Be sure not to move the crankshaft while the connecting rod
screws are tightened.
Crankpin O.D. Factory spec.
(Engine Serial Number : below YN3106)
Factory spec.
Oil clearance between
crankpin and crankpin
bearing
Allowable limit
(Engine Serial Number : above YN3107)
Factory spec.
Oil clearance between
crankpin and crankpin
bearing
Allowable limit
1-S58
ENGINE
52.977 to 52.990 mm
2.0857 to 2.0862 in.
0.030 to 0.063 mm
0.0012 to 0.0025 in.
0.20 mm
0.0079 in.
0.018 to 0.051 mm
0.0007 to 0.0020 in.
0.20 mm
0.0079 in.
W1067389
KiSC issued 03, 2008 A