BUSHING 4S6852 - Caterpillar

Illustration 1 g03341245
Illustration 2 g03341246
Use Tooling (A) in order to compress the appropriate valve spring (3). Note: Do not compress the valve spring so that valve spring retainer (2) touches valve stem seal (4).
Remove valve keepers (1).
Remove Tooling (A).
Remove valve spring retainer (2).
Remove valve spring (3).
Remove valve (5).
Remove valve stem seal (4).
Repeat Step 3 though Step 9 to remove the remaining valves. Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 1P-3527 Valve Spring Compressor 1
B(1) 256-4865 Valve Stem Seal Replacer 1
(1) C1.5 and C2.2
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: The installation procedure is identical the three cylinder and the four cylinder engines. The Illustrations show a four cylinder engine.
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 Systems Operation, Testing and Adjusting, "Cylinder Head Inspect" for the correct procedure.
Inspect the valve seats for wear and for damage. Refer to Specifications, "Cylinder Head Valves" for further information.
Inspect the valve guides for wear and for damage. Refer to Specifications, "Cylinder Head Valves" and Systems Operation, Testing and Adjusting, "Valve Guide - Inspect" for further information.
Inspect the valves for wear and for damage. Refer to Specifications, "Cylinder Head Valves" for the correct procedure.
Inspect the valve springs for the correct length. Refer to Specifications, "Cylinder Head Valves" for the correct procedure.
Illustration 3 g03341247
Use Tooling (B) to install new valve stem seals (4) onto each of the valve guides. Note: The outer face of the valve guides must be clean and dry before installing the valve stem seals.
Illustration 4 g03341246
Lubricate the stem of valve (5) with clean engine oil. Install valve (5) in the appropriate position in the cylinder head. Check the depth of the valve below the face of the cylinder head. Refer to Systems Operation, Testing and Adjusting, "Valve Depth - Inspect" for more information.
Install valve spring (3) to the cylinder head.
Position valve spring retainer (2) onto valve spring (3).
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.
Ensure that the valve spring is compressed squarely or damage to the valve stem may occur.
Illustration 5 g03341245
Use Tooling (A) in order to compress valve spring (3). Note: Do not compress the spring so that valve spring retainer (2) touches valve stem seal (4).
Install valve keepers (1).
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