C2.4 Tier 4 Final Engines for Caterpillar Built Machines Inlet and Exhaust Valves - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Remove cylinder head.

1. Clean the bottom mating surface of the cylinder head. Check the depth of the valves below the face of the cylinder head before the valve springs are removed. Refer to Specifications, "Cylinder Head Valves" for the correct dimensions.

2. Place a temporary identification mark on the heads of the valves to identify the correct position.

3. Use a suitable lifting device to position the cylinder head with the valve springs upward. The weight of the cylinder head is approximately 28 kg (61 lb).
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   Illustration 1	g06013564

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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.

4. Install Tooling (A) in position on the cylinder head and compress the valve spring to remove inlet and exhaust valves (1).
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   Illustration 2	g06013581

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   NOTICE
   Ensure that the valve spring is compressed squarely or damage to the valve stem may occur.

5. Remove valve cap (2). Apply sufficient pressure to Tooling (A) to remove valve keepers (3).

6. Slowly release pressure on Tooling (A).

7. Place a temporary identification make on valve spring (5) to identify the correct position.

8. Remove valve spring retainer (4), valve spring (5), and valve (6).

9. Remove Tooling (A).
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   Illustration 3	g06013653

10. Remove valve stem seals (7) from the cylinder head.

11. Repeat Step 4 through Step 10 for the remaining valves.

Installation Procedure

1. Install valves (6) in the reverse order of removal.

2. Clean all components of the cylinder head assembly. Ensure that all posts, all coolant passages, and all lubrication passages in the cylinder head are free from debris. Follow Step 2.a through Step 2.e to inspect components of the cylinder head assembly. Replace any components that are worn or damaged.

   1. Inspect the cylinder head for wear and for damage. Refer to System Operation, Testing and Adjusting, "Cylinder Head Inspect" for the correct procedure.

   2. Inspect the valve seats for wear and for damage. Refer to Specifications, "Cylinder Head Valves" for further information.

   3. Inspect the valve guides for wear and for damage. Refer to Specifications, "Cylinder Head Valves" for further information.

   4. Inspect the valves (6) for wear and for damage. Refer to Specifications, "Cylinder Head Valves" for further information.

   5. Inspect valve springs (5) for damage and for the correct length. Refer to Specifications, "Cylinder Head Valves" for further information.

3. Lubricate the stems of valves (6) with clean engine oil. Install valves (6) in the appropriate positions in the cylinder head. Check the depth of the valves below the face of the cylinder head. Refer to Specifications, "Cylinder Head Valves" for more information.