SEAT 3725985 - Caterpillar

Assembly Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     4C-3601     Piston Ring Expander     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.
Do not use a hard surfaced tool to install plug. Do not strike or impact plug during installation. If the plug is dropped, replace the plug with another new plug.
Note: The word "FRONT" may be stamped on the crown of the pistons in some engines. Ensure that the word "FRONT" is toward the front of the engine when the piston is installed. The etched number on the connecting rod must be on the right side of the engine in the corresponding cylinder. Ensure that the piston crown and the etched number are correctly positioned.
Illustration 1 g00516825
Place piston crown (2) in piston skirt (4). Place the piston assembly on connecting rod (5). Put clean engine oil on piston pin (7) and install the pin. Install new plug (3) .
Check the clearance between the ends of the piston rings. See 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. The ends of the spring should be rotated 180 degrees from the ring end gap. The white colored portion of the spring must be visible at the ring end gap.
Illustration 2 g00516756
Install the intermediate piston ring with the side marked "UP-2" toward the top of the piston. Use Tool (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 Tool (A) in order to install the ring.
After installation, all three of the piston rings should be placed 120 degrees away from each other.End By: Install the pistons and the connecting rods.