C3.3B Tier 4 Interim and EU Stage 3A Engines for Caterpillar Built Machines – Pistons and Connecting Rods – Disassemble

Disassembly Procedure

Start By:

1. Remove pistons and the connecting rods.

Note: Make a temporary mark on the components of the piston and connecting rod assembly. Marking the components will ensure that the components of each piston and connecting rod assembly can be reinstalled in the original cylinder. Mark the underside of the piston on the front pin boss. Do not interchange components.

Illustration 1	g02723365




Illustration 2	g02723368

1. Position the piston and connecting rod in a soft jaw vise. Use Tooling (A) to remove three rings (2) from piston (1) .

Illustration 3	g02723373




Illustration 4	g02723375

2. Remove retaining ring (4) and remove piston wrist pin (3) from piston (1) .

   Note: Note the position of the forged Mark (X) . The forged mark is for the purposes of correct orientation of the connecting rod assembly and piston assembly.

3. If necessary, remove bolts (7) and connecting rod bearings (6) from connecting rod (5) and connecting rod cap (8) . Inspect connecting rod bushing (9) .

Illustration 5	g03696304

4. Place the piston on a suitable surface with the crown upward. Use Tooling (B) in order to remove connecting rod bushing (9) from connecting rod (5) .

5. Inspect the connecting rod for wear and damage. If necessary, replace connecting rod (5) or replace the connecting rod bushing (9) .

   Note: If the connecting rod or the bush for the piston pin are replaced, refer to Specifications, "Connecting Rods" for the correct procedure.

6. Repeat Step 1 through Step 5 in order to disassemble the remaining pistons and connecting rods.