CONTROL AR-AUXILIARY 1211968 - 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 g00513641
Illustration 2 g00513644
Use Tooling (A) in order to remove valve seat inserts (1) .Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
B     1U-9170     Valve Seat Driver     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 3 g01176826
Illustration 4 g00513644
Lower the temperature of new valve seat insert (1) .
Use Tooling (B) in order to install the new valve seat insert in the cylinder head assembly.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.End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".