C15 On-highway Engine Caterpillar

Removal Procedure

Start By:

1. Remove the electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove".

Note: Place the piston at the top of the compression stroke (TC). Remove the valve springs for that cylinder. If the valves fall into the cylinder liner, then the cylinder head must be removed.

1. Position the No. 1 piston at the top center of the compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
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   Illustration 1	g01003285

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   Illustration 2	g01003311

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   Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

2. Install the compressor base in the electronic unit injector sleeve. Secure the compressor base with unit injector clamp (1). The compressor base and the bolt are part of Tooling (A) .

3. Install the compressor plate, the hard washer, and the full nut. These components are part of Tooling (A).

4. Tighten the full nut until valve spring keepers (3) are loose on the valve (2).

5. Remove valve spring keepers (3) from valve (2).

6. Carefully remove Tooling (A) from valves (2).

7. Remove valve rotator (4).

8. Remove outer valve spring (6) and inner valve spring (5) from valve (2).

9. Remove washer (7) from the valve guide.

10. Use Tooling (B) to check the valve springs (spring force). Refer to Specifications, "Cylinder Head Valves" for additional information on the valve springs.

11. Repeat Steps 1 through 10 for the remaining valve springs.

Installation Procedure

1. Lubricate the valve stems with clean engine oil.
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   Illustration 3	g01003518

2. Ensure that washer (7) is installed on the valve guide.

3. Install inner valve spring (5) and outer valve spring (6) on valve (2).

4. Install valve rotator (4) on valve (2).
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   Illustration 4	g01003311

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   The valve spring keepers can be thrown from the valve when the valve spring compressor is released. Ensure that the valve spring keepers are properly installed on the valve stem. To help prevent personal injury, keep away from the front of the valve spring keepers and valve springs during the installation of the valves.

5. Use Tooling (A) to compress inner valve spring (5) and outer valve spring (6). Install valve spring keepers (3) on each valve (2).

6. Carefully remove Tooling (A). Strike the top of the valve with a soft faced hammer in order to ensure that valve spring keepers (3) are properly installed.

7. Repeat Steps 1 through 6 for the remaining valve springs.

End By:

1. Install the electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Install".