XQC1200 and XQC1600 Power Modules Caterpillar

Removal Procedure

Start By:

1. Remove the cylinder head.

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Illustration 1	g01134319

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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.

1. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Remove valve spring keepers (1).

2. Carefully remove Tooling (A).

3. Remove valve rotator (2), inner valve spring (3), and outer valve spring (4).

4. Remove washer (5) from the exhaust valve guide.

5. Remove inlet valve (6) and exhaust valve (7 ) from the valve guides.

   Note: If the exhaust valves or the inlet valves will be reused, put identification marks on the exhaust valves and the inlet valves for installation purposes.

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   Illustration 2	g01133465

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

Installation Procedure

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Illustration 3	g01134256

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Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

1. Apply clean engine oil to the stem of exhaust valves (7). Install the exhaust valve into exhaust valve guide (10).

2. Install washer (5), inner valve spring (3), and outer valve spring (4) on exhaust valve guide (10).

3. Position valve rotator (2) on the stem of the exhaust valve.

4. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Install valve spring keepers (1) on the exhaust valve.
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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. Carefully remove Tooling (A). Strike the top of the valves with a soft faced hammer in order to ensure that valve spring keepers (1) are properly installed on the valve stems.

6. Apply clean engine oil to the stem of inlet valves (6). Install the inlet valve into inlet valve guide.

   Note: Ensure that valve stem seal (8) is installed on inlet valve guide (9).

7. Install inner valve spring (3) and outer valve spring (4) on inlet valve guide (9).

8. Position valve rotator (2) on the stem of the inlet valve.

9. Use Tooling (A) to compress inner valve spring (3) and outer valve spring (4). Install valve spring keepers (1) on the inlet valve.
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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.

10. Carefully remove Tooling (A). Strike the top of the valves with a soft faced hammer in order to ensure that valve spring keepers (1) are properly installed on the valve stems.

End By:

1. Install the cylinder head.