PIN AS 3889435 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool    Part Number    Part Description    Qty    
A     166-7441     Valve Seat Extractor Tool     1    Start By:
Remove the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g00580867
Use Tooling (A) in order to remove the valve seat inserts from the cylinder head.Installation Procedure
Table 2
Required Tools    
Tool    Part Number    Part Description    Qty    
B     343-6646     Valve Seat Driver (Exhaust)     1    
343-6647 Valve Seat Driver (Inlet)     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g00514542
Lower the temperature of the new valve seat inserts.Note: Do not machine the prefinished valve seat inserts in order to correct the valve stem projection. An excessive valve stem projection indicates that the valve seat insert is not seated or material was not cleaned from the bottom of the counterbore.
Use Tooling (B) in order to install the new valve seat inserts (1) in the cylinder head.End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, " Inlet and Exhaust Valves - Remove and Install".