C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods

Pistons and Connecting Rods - Remove

C6.6 Engines for Caterpillar Built Machines [KENR6081]

C6.6 Engines for Caterpillar Built Machines Piston Cooling Jets - Remove and Install

C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Disassemble

BASIC ENGINE

PISTON & ROD GP

3408E and 3412E Engines for Caterpillar Built Machines Bearing Clearance - Check

C6.6 Engines for Caterpillar Built Machines Piston Cooling Jets - Remove and Install

C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Remove

C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Disassemble

C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Assemble

C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Install

C6.6 Engines for Caterpillar Built Machines Connecting Rod Bearings - Remove - Connecting rods in position

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Name	Qty
A⁽¹⁾	9U-6198	Crankshaft Turning Tool	1
A⁽²⁾	9U-7336	Housing	1
A⁽²⁾	5P-7305	Engine Turning Tool	1
B	8S-2269	Ridge Reamer	1

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⁽¹⁾	The Crankshaft Turning Tool is used on the front pulley.
⁽²⁾	This Tool is used in the aperture for the electric starting motor.

Start By:

Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove" for the correct procedure.
Remove the engine oil pump. Refer to Disassembly and Assembly, "Engine Oil Pump - Remove" for the correct procedure.
Remove the piston cooling jets. Refer to Disassembly and Assembly, "Piston Cooling Jets - Remove and Install" for the correct procedure.

Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.

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NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Use Tooling (A) to rotate the crankshaft until the crank pin is at the bottom center position.
Use Tooling (B) to remove the carbon ridge from the top inside surface of the cylinder bore.
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Illustration 1 g06021015

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Illustration 2 g06021018

Bolt (3a) are Torx
Bolt (3b) are Bi-Hex
Two types of bolts (3a) or (3b) may be installed.
The connecting rod and the connecting rod cap should have an etched Number (X) on the side. The number on the connecting rod and the connecting rod cap must match. Ensure that connecting rod (1) and connecting rod cap (2) are marked for the correct location. If necessary, make a temporary mark on the connecting rod and the connecting rod cap to identify the cylinder number.
Note: Do not stamp the connecting rod assembly. Stamping or punching the connecting rod assembly could cause the connecting rod to fracture.
Remove bolts (3) and connecting rod cap (2) from connecting rod (1).
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Illustration 3 g01341292
Carefully push piston (4) and the connecting rod out of the cylinder bore. Lift piston (4) out of the top of the cylinder block.
Note: Do not push on the fracture split surfaces of the connecting rod as damage may result.
Repeat Steps 1 through 6 for the remaining pistons and connecting rods.
Note: Fracture split connecting rods should not be left without the connecting rod caps installed. Temporarily install connecting rod cap (2) and bolts (3) to connecting rod (1) when the assembly is out of the engine. Ensure that the etched number on connecting rod cap matches the etched number on connecting rod . Ensure the correct orientation of the connecting rod cap . The locating tab for the upper bearing shell and the lower bearing shell should be on the same side. Tighten bolts (3) to a torque of 20 N·m (14 lb ft).