BLOWER AS 1307255 - Caterpillar

Table 1
Connecting Rod Bearing Journal
Original size journal 64.945 to 64.965 mm (2.5569 to 2.5577 inch)
Undersize journal
0.25 mm (0.010 inch) 64.695 to 64.715 mm (2.5470 to 2.5478 inch)
Undersize journal
0.50 mm (0.020 inch) 64.445 to 64.465 mm (2.5372 to 2.5380 inch)
Undersize journal
0.75 mm (0.030 inch) 64.195 to 64.215 mm (2.5274 to 2.5281 inch) The clearance between a new bearing and a new journal is the following value. ... 0.035 to 0.100 mm (0.0014 to 0.0039 inch)An undersized bearing is required if the clearance between the connecting rod journal and the bearing is in excess of the service limit of 0.200 mm (0.0079 inch). If the crankshaft is worn excessively, or if the crankshaft is uneven, an undersized bearing is required. If an undersized bearing is required, grind the crankshaft to a dimension listed in Table 1.Note: The allowable tolerance for rod bearing journals that are out of round is 0.010 mm (0.0004 inch). The maximum repair limit is 0.030 mm (0.0012 inch). If the repair limit is exceeded, regrind the bearing journals to the specified dimension.