CORE ASSEM. 2M8045 - Caterpillar

Illustration 1 g03324908
Illustration 2 g03324909
View G-G
Table 1
Specification for 144-0725 Rod As
Item Qty Part Specification Description
A - - Angle above the centerline on either side of the bearing joint for the sleeve bearing for the piston pin is 10 degrees.
B - - The connecting rod may be heated from 175 to 260 °C (347 to 500 °F) for the installation of the bushing for the piston pin. Minimum length for heating the connecting rod is 105 mm (4.1 inch). Do not use a torch to heat the connecting rod.
C 1 118-1655 Bushing Thoroughly lubricate the piston pin with clean engine oil prior to assembly of the piston and the connecting rod.
Bore in the bushing for the piston pin after installation of the bushing is 70.000 0.008 mm (2.7559 0.0003 inch).
Bore in the connecting rod for the bushing is 75.760 0.015 mm (2.9827 0.0006 inch).
D - - Distance between the center of the bearings is 380 mm (14.961 inch).
E 1 7N-2043 Dowel Protrusion of the dowel from the connecting rod cap is 4.0 0.5 mm (0.16 0.02 inch).
F - - Bore in the connecting rod for the bearing for the crankshaft connecting rod journal after applying final torque to the connecting rod bolts is 143.028 0.015 mm (5.6310 0.0006 inch).
1 - - Etch the cylinder number on the connecting rod and the cap in this location. Mark the connecting rod and the cap with numbers. Mark the numbers on the same side of the connecting rod as the bearing retainer notch.
2 - - The chamfer side must be next to the crank pin thrust surface when the connecting rod and piston group is assembled in the engine.
3 - - Location pin for correct installation of connecting rod caps
4 4 7N-2405 Bolt Use the following procedure for tightening the connecting rod bolts:
Bolt 1 and bolt 2 must be on the same end of the connecting rod cap that has bearing tabs and location pin (3).
1. Before assembly, apply Molylube on the bolt threads, the bolt shank, and the bolt seat.
2. Sequentially tighten the bolt 1 and bolt 2 to 90 5 N m (66 4 lb ft).
3. Sequentially tighten the bolt 3 and bolt 4 to 90 5 N m (66 4 lb ft).
4. Again, sequentially tighten the bolt 3 and bolt 4 to 90 5 N m (66 4 lb ft).
5. Tighten each bolt for an additional 90 5 degrees.
Side clearance between two connecting rods on the same new crankshaft pin is 0.850 0.332 mm (0.0335 0.0131 inch).