C4.4 Engines for Caterpillar Built Machines Connecting Rod Bearing Journal - Spheroidal Graphite Iron Crankshaft Caterpillar


Connecting Rod Bearing Journal - Spheroidal Graphite Iron Crankshaft
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1.1. The Shell for the Connecting Rod Bearings
2.2. Standard Bearing Shells

Table 1
Item  Quantity  Part  Specification Description 
The original size of the connecting rod bearing journal   67.99 mm (2.6768 inch) to 68.01 mm (2.6776 inch) 
Maximum permissible wear of the connecting rod bearing journals   0.04 mm (0.0016 inch) 
Width of the connecting rod bearing journals  40.305 mm (1.5868 inch) to 40.455 mm (1.5927 inch) 
Surface finish of connecting rod bearing journals and radii  Ra 0.0025 microns (10 µ inch) 

The Shell for the Connecting Rod Bearings

Standard Bearing Shells

Table 2
Item  Quantity  Part  Specification Description 
All  Thickness at center of the shells  1.995 mm (0.0785 inch) to 2.002 mm (0.0788 inch) 
All  Width of the connecting rod bearing shells  31.47 mm (1.2390 inch) to 31.73 mm (1.2492 inch) 
All  Clearance between the bearing shell and the connecting rod bearing journals  0.031 mm (0.0012 inch) to 0.078 mm (0.0031 inch) 

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