BUCKET AS 4401493 - Caterpillar

Assembly Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1U-6683     Ring Expander     1    
B     1P-1861     Retaining Ring Pliers     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Verify correct assembly of the pistons and the connecting rods. Ensure that the etched numbers on the rod and the rod cap are in the correct positions. The etched number on the rod and the rod cap correspond to the cylinder in which it should be installed.
Illustration 1 g00610428
Check the clearance between the ends of piston rings (5). Refer to the Specifications Manual, "Pistons and Rings" topic.Note: The oil ring must be installed over the spring with the end gap 180 degrees from the oil ring spring joint.
Install the oil control piston ring with Tooling (A). The ends of the spring should be rotated 180 degrees from the ring end gap.
Install the intermediate piston ring with the side marked "UP-2" toward the top of the piston. Use Tooling (A) in order to install the ring.
Install the top piston ring with the side marked "UP-1" toward the top of the piston. Use Tooling (A) in order to install the ring.
Illustration 2 g00610498
Replace rod bearing (6) by pressing a new bearing into the connecting rod. Refer to Special Instruction, SEHS7295 for the correct tooling and the correct installation procedure.
Illustration 3 g00610503
The piston is a two-piece assembly. This piston consists of piston crown (7) and piston skirt (8). Inspect bearing (9) in the piston crown (7). The piston crown must be replaced if the piston crown is worn or damaged. Bearing (9) is nonserviceable.
Illustration 4 g00610426
Position piston (1) on connecting rod (3). Coat pin (4) with clean engine oil and install pin (4). Use Tooling (B) to install the retaining rings. Ensure that the retainer rings are in the grooves of piston (1) .End By: Install the pistons and the connecting rods. Refer to Disassembly and Assembly, "Piston and Connecting Rods - Install".