ENGINE
B1220, B1620, B1820, WSM
1-S51
(EU)
Crankshaft Alignment
1. Support the crankshaft with V blocks on the surface plate at
both end journals.
2. Set a dial indicator with its tip on the intermediate journal.
3. Measure the crankshaft alignment.
4. If the measurement exceeds the allowable limit, replace the
crankshaft.
9Y1210272ENS0085US0
Oil Clearance between Crankpin and Crankpin Bearing
1. Clean the crankpin and crankpin bearing.
2. Put a strip of plastigage 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.
(Reference)
• Undersize crankpin bearing
9Y1210272ENS0086US0
Crankshaft alignment
Allowable limit
0.02 mm
0.0008 in.
Oil clearance between
crankpin and crankpin
bearing
Factory specification
0.020 to 0.051 mm
0.00079 to 0.0020 in.
Allowable limit
0.15 mm
0.0059 in.
Crankpin O.D.
Factory specification
33.959 to 33.975 mm
1.3370 to 1.3375 in.
Crankpin bearing I.D.
Factory specification
33.995 to 34.010 mm
1.3384 to 1.3389 in.
Oversize
Bearing
Code Number
Marking
0.20 mm
0.0079 in.
Crankpin bearing 02
15861-22970
020 US
0.40 mm
0.016 in.
Crankpin bearing 04
15861-22980
040 US
Oversize
0.20 mm
0.0079 in.
0.40 mm
0.0016 in.
Dimension
A
2.3 to 2.7 mm radius
0.091 to 0.10 in.radius
2.3 to 2.7 mm radius
0.091 to 0.10 in.radius
*Dimension
B
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
1.0 to 1.5 mm relief
0.040 to 0.059 in. relief
Dimension
C
33.759 to 33.775 mm dia.
1.3291 to 1.3297 in. dia.
33.559 to 33.575 mm dia.
1.3213 to 1.3218 in. dia.
The crankpin journal must be fine-finished to higher than Rmax=0.8S
*Holes to be de-burred and edges rounded with 1.0 to 1.5 mm (0.040 to 0.059
in.) relief.
KiSC issued 07, 2011 A
Summary of Contents for B1220
Page 1: ...WORKSHOP MANUAL TRACTOR B1220 B1620 B1820 KiSC issued 07 2011 A ...
Page 3: ...I INFORMATION KiSC issued 07 2011 A ...
Page 9: ...INFORMATION B1220 B1620 B1820 WSM I 5 EU 9Y1210272INI0002US0 KiSC issued 07 2011 A ...
Page 13: ...G GENERAL KiSC issued 07 2011 A ...
Page 68: ...1 ENGINE KiSC issued 07 2011 A ...
Page 126: ...2 CLUTCH KiSC issued 07 2011 A ...
Page 127: ...CONTENTS 1 LINKAGE MECHANISM 2 M1 MECHANISM KiSC issued 07 2011 A ...
Page 141: ...3 TRANSMISSION KiSC issued 07 2011 A ...
Page 177: ...4 REAR AXLE KiSC issued 07 2011 A ...
Page 178: ...CONTENTS 1 STRUCTURE 4 M1 MECHANISM KiSC issued 07 2011 A ...
Page 186: ...5 BRAKES KiSC issued 07 2011 A ...
Page 203: ...6 FRONT AXLE KiSC issued 07 2011 A ...
Page 204: ...CONTENTS 1 STRUCTURE 6 M1 MECHANISM KiSC issued 07 2011 A ...
Page 218: ...7 STEERING KiSC issued 07 2011 A ...
Page 244: ...8 HYDRAULIC SYSTEM KiSC issued 07 2011 A ...
Page 274: ...9 ELECTRICAL SYSTEM KiSC issued 07 2011 A ...
Page 277: ...ELECTRICAL SYSTEM B1220 B1620 B1820 WSM 9 M2 EU 2 B1220 WITH OPC TYPE KiSC issued 07 2011 A ...