COLLAR-END 1205785 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     6V-4805     Valve Seat Extractor Tool Group     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 g00490857
Use Tooling (A) in order to remove the valve seat insert from the cylinder head.
Clean the valve seat in the cylinder head. Remove any rough areas from the valve seat in the cylinder head.
Repeat Steps 1 and 2 for the remaining inlet valve seat inserts and exhaust valve seat inserts.Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
A     6V-4805     Valve Seat Extractor Tool Group     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g00508515
Shrink the new valve insert with reduced temperature. Use Tooling (A) in order to install the new valve seat insert in the cylinder head.Note: Do not increase the diameter of the extractor in the valve seat insert when the insert is installed in the cylinder head.
Repeat Step 1 for the remaining inlet valve seat inserts and exhaust valve seat inserts.End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".