ENGINE AR-COMPLETE 3618104 - Caterpillar

Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-6683 Ring Expander 1
B 387-1313 Piston Wrist Pin Tool 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.
Illustration 1 g02836831
Inspect the connecting rod for wear and damage. If necessary, replace connecting rod (5) or replace connecting rod bushing (9).Note: If connecting rod (5) or the bushing (9) for connecting rod pin are replaced, refer to Specifications, "Connecting Rods" for the correct procedure.
Place the piston on a suitable surface with the crown upward. Use Tooling (B) to install connecting rod bushing (9) into connecting rod (5).
Illustration 2 g02723373
Illustration 3 g02723375
Check connecting rod bushing (9). If necessary, install connecting rod bearings (6) into connecting rod (5) and connecting rod cap (8). Inspect bolts (7) or replace with new for assembly later.
Lubricate the bore for the piston wrist pin (3) with clean engine oil.
Illustration 4 g02840445
Place piston (1) on a suitable surface with the crown downward. Position connecting rod (5) with the forged markings on the piston and connecting rod in the correct orientation.Note: The mark (5A) on the connecting rod (5) must align with the fuel pump. Mark (1A) on the piston (1) must align with the flywheel.
Install piston wrist pin (3) into piston (1). Install retaining ring (4).
Illustration 5 g02723365
Illustration 6 g02723368
Position the connecting rod and piston (1) into a soft jaw vise. Use Tooling (A) to install three rings (2) onto piston (1).
Illustration 7 g06045622
If the original piston is assembled, follow Step 9.a through Step 9.e to install the piston rings.
Position the spring for the oil control ring into the oil ring groove in piston (1). The central wire must be located inside the end of the spring.
Position the oil control ring with the manufacturing mark in the upward position as shown in Illustration 7. Use Tooling (A) to install over the piston and the spring.Note: Ensure that the central wire is 180 degrees from the ring gap.
Use Tooling (A) to install the intermediate compression ring into the second groove in piston (1). The manufacturing mark must be upward. The chamfer on the inner face must be downward.
Use Tooling (A) to install top the compression ring into the top groove in piston (1). The manufacturing mark must be upward.
Position piston ring (2) gaps at 120 degrees away from each other.
Repeat Step 2 through Step 9.e for the remaining piston and connecting rod assemblies.End By:
Install the pistons and the connecting rods.