3412C Engine Caterpillar

Installation Procedure

1. Put clean engine oil on the pistons, on the piston rings, and in the cylinder liners.

2. Use Tool (B) and turn the crankshaft so that the corresponding crank pin for the connecting rod and piston that is to be installed is at the bottom center position.

Show/hide table



Illustration 1	g00786646
Top view of cylinder numbers

3. The connecting rods have numbers stamped on the tab slot side of the connecting rod. Numbers are also stamped on the bearing caps. The number designates which cylinder to install the piston and rod. Etch the cylinder number in the proper location on a connecting rod and bearing cap that does not have a number.

Show/hide table



Illustration 2	g00786604
Cross section of connecting rod

4. The connecting rod and piston are to be installed in the engine with surface (D) adjacent to the thrust surface of the crank pin. Surface (C) is to thrust against the mating rod on the same crank pin. Be sure to install the connecting rod and piston with this orientation.

Show/hide table



Illustration 3	g00566325

5. Use Tool (A) and a soft hammer to install piston (2) and the connecting rod in the cylinder liner.

6. Install the bearing cap on the connecting rod. The number on the side of the bearing cap is on the same side as the number on the connecting rod.

Show/hide table



Illustration 4	g00568813

7. Thoroughly lubricate the threads of the bolts on the connecting rod with clean engine oil. Install the bearing cap and the nuts. Tighten nuts (1) on the bearing cap to a torque of 82 ± 8 N·m (60 ± 6 lb ft). Put a mark on each nut and on each bearing cap. Tighten each nut an additional 120 ± 5 degrees.

8. Repeat Steps 1 through 7 in order to install the remainder of the remainder of the pistons and connecting rods.

End By:

1. Install the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Install".
2. Install the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Install".