ROCKER ARM AS 8N3326 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     5S-1330     Valve Spring Compressor     1    
B     8S-2263     Spring Tester     1    Start By:
Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01163301
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.
Use Tooling (A) to compress the valve springs. Remove valve spring retainers (2) from valve (1) .
Carefully remove Tooling (A) from valve (1) .
Remove valve rotator (3) .
Remove valve spring (4) from valve (1) .
Remove washer (5) and valve (1) from the valve guide.
Use Tooling (B) to check the valve springs (spring force). Refer to Specifications, "Cylinder Head Valves".
Inspect the inlet valves and the exhaust valves. Refer to Specifications, "Cylinder Head Valves".Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     5S-1330     Valve Spring Compressor     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Lubricate the inlet valves and the exhaust valves with clean engine oil. Install the inlet valves and the exhaust valves in the cylinder head.
Illustration 2 g01163301
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.
Ensure that washer (5) is installed on the valve guide.
Install valve spring (4) on valve (1) .
Install valve rotator (3) on valve (1) .
Use Tooling (A) to compress valve spring (4). Install valve spring retainers (2) on valve (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 the valves.
Carefully remove Tooling (A). Strike the top of the valve with a soft faced hammer in order to ensure that valve spring retainers (2) are properly installed.End By: Install the cylinder head. Refer to Disassembly and Assembly, " Cylinder Head - Install".