LONG BLOCK M 20R0163 - Caterpillar

Assembly Procedure
Reference: Special Instruction, "Visual Service Procedures - Colors and Symbols" M0066576.
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Ring Expander 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
If the original piston is assembled, follow the steps to install the piston rings.Note: A new piston assembly is supplied with new piston rings.
Illustration 1 g06280093Note: Ensure that the central wire is 180 degrees from the ring gap.
Illustration 2 g06280094
Position the oil control ring with the word "TOP" in the upward position.
Illustration 3 g06280097
Position the compression ring with the word "TOP" in the upward position. The chamfer on the inner face must be downward.
Illustration 4 g06280099
Position the compression ring with the word "TOP" in the upward position.
Note: Ensure that the top compression ring is installed with the Chamfer in the upward position.
Illustration 5 g06280100
Lubricate the bushing with clean engine oil.
Illustration 6 g06280103
Lubricate the bore for the piston pin in the piston with clean engine oil.
Illustration 7 g06280104
Position the connecting rod with forged Mark (X) to the square boss on the piston.
Note: Ensure that the circlips are seated in the grooves in the piston.
Illustration 8 g06280105
Ensure that the locating tab for the upper bearing shell is correctly seated in the slot in the connecting rod.
Ensure that the locating tab for the lower bearing shell is correctly seated in the slot in the connecting rod cap.
Fracture split connecting rods should not be left without the connecting rod caps installed. Temporarily install the connecting rod cap and the bolts to the connecting rod when the assembly is out of the engine. Ensure that the etched number on connecting rod cap matches the etched number on connecting rod. Ensure the correct orientation of the connecting rod cap. The locating tab for the upper bearing shell and the lower bearing shell should be on the same side.
End By:
Install the pistons and the connecting rods.