TUBE AS 2850965 - Caterpillar

Assembly Procedure
Table 1
Required Tooling
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
B 1U-6683 Ring Expander 1
C 1P-0510 Drive Group 1
Ensure that all components are clean and free from wear or damage. If necessary, replace any components that are worn or damaged.
Removal of the piston pin bushing in the connecting rod must be carried out by personnel with the correct training. Also special machinery is required. For more information refer to your authorized Caterpillar dealer.
Illustration 1 g02869475
If necessary, use Tooling (C) and a suitable press to install piston pin bearing (11) into connecting rod (7). Ensure that oil hole in the piston pin bearing is aligned with the oil hole at the top of the connecting rod.
Illustration 2 g02869238
Illustration 3 g02939378
Lubricate piston pin bearing (11) and lubricate the bore for the piston pin in the piston with clean engine oil.
Ensure the correct orientation of the connecting rod in the piston. Install connecting rod (7) and piston pin (6) to the piston. Align the arrow that is on the piston to the number markings that are on the connecting rod. The arrow and the number marking must point toward the fuel pump when installed.Note: If the piston pin cannot be installed by hand, heat the piston to a temperature of 45 5 °C (113 9 °F). Do not use a torch to heat the piston.
Use Tooling (B) to install retaining ring (5) and retaining ring (4) to the piston pin bore.Note: Ensure that the retaining rings are seated in the grooves in the piston.
Follow Steps 6.a through 6.d to install the piston rings to the piston.
Illustration 4 g02939416
Illustration 5 g00829406Note: Install the oil control rings with the manufacturers mark facing upward.
Use Tooling (B) to install oil control ring (3).
Use Tooling (B) to install second compression ring (2) into the second groove in the piston.
Use Tooling (B) to install top compression ring (1) into the top groove in the piston.
Illustration 6 g02868961
The correct position of the piston ring gaps
(A) Ring gap of the top compression ring
(B) Ring gap of the second compression ring
(C) Ring gap of the oil ring
Align the piston ring gaps to the positions that are shown in Illustration 6.
Install the upper half of connecting rod bearing (10) to connecting rod (7).
Install the lower half of connecting rod bearing (10) to connecting rod cap (9).
Repeat Steps 2 through 8 to assemble the remaining pistons and connecting rods.End By:
Install the pistons and connecting rods.Note: If the piston, piston pin bushing, connecting rod, or connecting rod bearing has been replaced, then a different head gasket maybe required. Refer to Specification, "Cylinder Head" and the section on Selecting the Correct Cylinder Head Gasket.