G3408 and G3412 Engines Caterpillar


Connecting Rod and Main Bearing Journals

Usage:

G3408 6NB

Connecting Rod Bearing Journals

Table 1
Diameter of Crankshaft Journal (Bearing Surface) For Connecting Rod    
Original Size Journal     97.028 ± 0.020 mm (3.8200 ± 0.0008 inch)    
Undersize Journal
0.63 mm (0.025 inch)    

96.393 ± 0.020 mm (3.7950 ± 0.0008 inch)    
Undersize Journal
1.27 mm (0.050 inch)    

95.758 ± 0.020 mm (3.7700 ± 0.0008 inch)    

Clearance between new bearing and new journal ... 0.071 to 0.168 mm (0.0028 to 0.0066 inch)

Maximum permissible clearance between bearing and journal ... 0.25 mm (0.010 inch)

Main Bearing Journals

Table 2
Diameter of Crankshaft Journal (Bearing Surface) for Main Bearings    
Original Size Journal    
120.650 ± 0.020 mm (4.7500 ± 0.0008 inch)    
Undersize Journal

0.63 mm (0.025 inch)    

120.015 ± 0.020 mm (4.7250 ± 0.0008 inch)    
Undersize Journal

1.27 mm (0.050 inch)    

119.380 ± 0.020 mm (4.7000 ± 0.0008 inch)    

Clearance between new bearing and new journal ... 0.091 to 0.186 mm (0.0036 to 0.0073 inch)

Maximum permissible clearance between bearing and journal ... 0.25 mm (0.010 inch)

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