PLUG AS 5S7433 - Caterpillar

Start By:
Remove the electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Remove".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Place the piston at the top of the Compression Stroke (TC). Remove the valve springs for that cylinder. If the valves fall into the cylinder liner, then the cylinder head must be removed.
Place the piston at the top of the Compression Stroke (TC) of the cylinder.
Illustration 1 g01003285
Illustration 2 g01003311
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.
Secure Tooling (A) with unit injector clamp (1) .
Tighten the full nut until valve spring retainers (3) are loose on valve (2) .
Remove valve spring retainers (3) from valve (2) .
Carefully remove Tooling (A) from valves (2) .
Remove valve rotator (4) .
Remove outer valve spring (6) and inner valve spring (5) from valve (2) .
Remove washer (7) from the valve guide.
Use Tooling (B) to check the valve springs (spring force). Refer to Specifications, "Cylinder Head Valves".Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A (1)     1U-8826     Thrust Bearing     1    
9U-7242 Compressor Plate     1    
9U-7548 Compressor Base     1    
2J-3506 Full Nut     1    
5P-8248 Hard Washer     1    
0L-1143 Bolt     1    
( 1 ) Part of the 9U-7241 Valve Spring Compressor
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Lubricate the valve stems with clean engine oil.
Illustration 3 g01003311
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 (7) is installed on the valve guide.
Install inner valve spring (5) and outer valve spring (6) on valve (2) .
Install valve rotator (4) on valve (2) .
Secure Tooling (A) with unit injector clamp (1) . Use Tooling (A) to compress the valve springs. Install valve spring retainers (3) on each valve (2) .
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 (3) are properly installed.End By: Install the electronic unit injectors. Refer to Disassembly and Assembly, "Electronic Unit Injector - Install".