ROD ASSEM. 6J6885 - Caterpillar

Table 1
Tools Needed     Quantity    
1P-4000 Line Boring Tool Group     1    
1P-3537 Dial Bore Gauge Group     1    
4C-4519 Piston Ring Groove Gauge Gp     1    If the main bearing caps are installed without bearings, the bore in the block for the main bearings can be checked. Tighten the nuts that hold the caps to the torque that is shown in the Specifications. Alignment error in the bores must not be more than 0.08 mm (0.003 inch). Refer to the Special Instruction, SMHS7606 for the correct procedure for using the 1P-4000 Line Boring Tool Group for the alignment of the main bearing bores. The 1P-3537 Dial Bore Gauge Group can be used to check the size of the bores. The Special Instruction, GMGO0981 is with the group.
Illustration 1 g00285686
1P-3537 Dial Bore Gauge Group Piston Rings
The 4C-4519 Piston Ring Groove Gauge is available for checking the top piston ring groove with straight sides. Refer to Guideline For Reusable Parts, SEBF8049, "Pistons".Connecting Rod Bearings
The connecting rod bearings fit tightly in the bore in the rod. If the bearing joints are fretted, check the bore size. This can be an indication of wear because of a loose fit.Connecting rod bearings are available with 0.63 mm (0.025 inch) and 1.27 mm (0.050 inch) smaller inside diameter than the original size bearing. These bearings are for crankshafts that have been ground.Main Bearings
Main bearings are available with a larger outside diameter than the original size bearings. These bearings are available for the cylinder blocks with the main bearing bore that is made larger than the bores' original size. The size that is available has a 0.63 mm (0.025 inch) outside diameter that is larger than the original size bearings.