WORM 8F7425 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9U-6195 Valve Spring Compressor 1
416-0292 Adapter 1
416-0288 Head 1 Start By:
Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove" for the correct procedure.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Clean the bottom gasket 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.
Place a temporary identification mark on the heads of the valves in order to identify the correct position. Note: Inlet valves have a recess in the center of the head.
Use a suitable lifting device to position the cylinder head with the valve springs upward. The weight of the cylinder head is approximately 96 kg (212 lb). Note: Ensure that the cylinder head is kept on a clean, soft surface in order to prevent damage to the machined face.
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.
Illustration 1 g02727668
Install Tooling (A) into position on the cylinder head in order to compress appropriate valve spring (3).
Ensure that the valve spring is compressed squarely or damage to the valve stem may occur.
Apply sufficient pressure to Tooling (A) in order to remove valve keepers (1). Note: Do not compress the spring so that valve spring retainer (2) touches valve stem seal (4).
Slowly release the pressure on Tooling (A).
Illustration 2 g02727669
Place a temporary identification mark on valve spring (3) in order to identify the correct position.
Remove valve spring retainer (2). Remove valve spring (3).
Repeat Step 4 through Step 8 for the remaining valves.
Remove Tooling (A).
Remove valve stem seals (4). The inlet and exhaust valve stem seals are different, the valve stem seals are denoted by the color. Identify the position of the different color valve stem seals for installation purposes.
Use a suitable lifting device to turn over the cylinder head.
Place a temporary identification mark on valves (5). Remove valves (5) from the cylinder head. Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 9U-6195 Valve Spring Compressor 1
416-0292 Adapter 1
416-0288 Head 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: The valves have a hard surface finish. Grinding compound must not be used on the valves. Grinding compound will damage the hard surface finish of the valves.
Clean all components of the cylinder head assembly. Ensure that all ports, all coolant passages, and, all lubrication passages in the cylinder head are free from debris. Follow Step 1.a through Step 1.e in order to inspect the components of the cylinder head assembly. Replace any components that are worn or damaged.
Inspect the cylinder head for wear and for damage. Refer to System Operation, Testing and Adjusting, "Cylinder Head Inspect" for the correct procedure.
Inspect the