C6.6 Industrial Engine Caterpillar

Installation Procedure With Oil Pan in Position

Note: The crankshaft rear seal and the housing are manufactured as one assembly.

Note: Do not lubricate the crankshaft rear seal or the crankshaft flange. The crankshaft rear seal must be installed dry.

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Illustration 1	g01986153

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Illustration 2	g01986154

1. Ensure that crankshaft flange (1) is clean, dry, and free from damage.

2. Ensure that the gasket surface of the cylinder block is clean, dry, and free from damage. Ensure that the gasket surface of isolating frame (6) is clean, dry, and free from damage.

3. Ensure that plastic sleeve (3) is squarely installed within new crankshaft rear seal (2).

   Note: The plastic sleeve is included in order to protect the lip of the seal as the crankshaft rear seal is pushed over crankshaft flange (1). Do not attempt to install a crankshaft rear seal without the plastic sleeve.

4. Place the assembly of crankshaft rear seal (2) over crankshaft flange (1). Align dowel (5) with the slot in crankshaft rear seal (2).

5. Ensure that plastic sleeve (3) is engaged on crankshaft flange (1). Push crankshaft rear seal (2) squarely onto the crankshaft. Ensure that the crankshaft rear seal is seated against the cylinder block. During this process, plastic sleeve (3) will be forced out of the crankshaft rear seal. Discard the plastic sleeve.

   Note: Ensure that dowel (5) is engaged in the slot in the crankshaft rear seal.

6. Use Tooling (A) in order to install two outer Torx bolts (7) at the base of crankshaft rear seal (2). Tighten Torx bolts (7) to a torque of 15 N·m (133 lb in).

7. Use Tooling (B) in order to install two Torx bolts (4) to crankshaft rear seal (2) at Position (X). Tighten Torx bolts (4) to a torque of 22 N·m (195 lb in).

8. Use Tooling (A) in order to unscrew Torx bolts (7) by one complete turn.

9. Use Tooling (A) in order to install remaining Torx bolts (7). Tighten all Torx bolts (7) to a torque of 22 N·m (195 lb in).
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   Illustration 3	g02469677

10. Tighten all Torx bolts (4) in the numerical sequence that is shown in Illustration 3. Tighten all Torx bolts (4) to a torque of 22 N·m (195 lb in).

End By:

1. Install the flywheel housing. Refer to Disassembly and Assembly, "Flywheel Housing - Remove and Install" for the correct procedure.

Installation Procedure Without Isolating Frame for the Oil Pan

Note: The crankshaft rear seal and the housing are manufactured as one assembly.

Note: Do not lubricate the crankshaft rear seal or the crankshaft flange. The crankshaft rear seal must be installed dry.

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Illustration 4	g01279001
Alignment tool

1. To install the crankshaft rear seal without the isolating frame for the oil pan in position, Tooling (C) must be used. The tool should be fabricated from 8 mm (5/16 inch) steel stock. The dimensions for the tool are given in Illustration 4. All dimensions are shown in millimeters.
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   Illustration 5	g02435316

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   Illustration 6	g01988593

2. Ensure that crankshaft flange (1) is clean, dry, and free from damage.

3. Ensure that the gasket surface of the cylinder block is clean and dry.

4. Ensure that plastic sleeve (3) is squarely installed within new crankshaft rear seal (2).

   Note: The plastic sleeve is included in order to protect the lip of the seal as the crankshaft rear seal is pushed over crankshaft flange (1). Do not attempt to install a crankshaft rear seal without the plastic sleeve.

5. Place the assembly of the crankshaft rear seal over crankshaft flange (1). Align dowel (5) with the slot in the crankshaft rear seal.

6. Ensure that plastic sleeve (3) is engaged on crankshaft flange (1). Push crankshaft rear seal (2) squarely onto the crankshaft. Ensure that the crankshaft rear seal is seated against the cylinder block. During this process, plastic sleeve (3) will be forced out of the crankshaft rear seal. Discard the plastic sleeve.

   Note: Ensure that dowel (5) is engaged in the hole in the crankshaft rear seal.

7. Install Tooling (C) to the cylinder block and to crankshaft rear seal (2). Tighten the bolts to a torque of 15 N·m (133 lb in).

8. Use Tooling (A) in order to install two Torx bolts (4) to crankshaft rear seal (3) in Position (X). Tighten the two Torx bolts (4) to a torque of 22 N·m (195 lb in).

9. Use Tooling (A) in order to install remaining Torx bolts (4).
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   Illustration 7	g02469677

10. Tighten all Torx bolts (4) in the numerical sequence that is shown in Illustration 7. Tighten all Torx bolts (4) to a torque of 22 N·m (195 lb in).

11. Remove Tooling (C).

End By:

1. Install the engine oil pan plate. Refer to Disassembly and Assembly, "Engine Oil Pan Plate - Remove and Install" for the correct procedure.