ENGINE AR-PRIMARY 4775057 - Caterpillar

Removal Procedure
Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A (1)     6V-4194     Valve Seat Extractor (2)     1    
165-5647 Valve Seat Extractor (3)     1    
6V-4804 Handle     1    
6V-4192 Shaft     1    
6V-4199 Lifting Bracket     1    
( 1 ) Part of the 166-7441 Valve Seat Extractor Tool Group
( 2 ) Use for removal of the exhaust valve seats
( 3 ) Use for removal of the inlet valve seatsStart 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 g01124436
Use Tooling (A) to remove valve seat inserts (1) .Installation Procedure
Table 2
Required Tools    
Tool     Part Number     Part Description     Qty    
B     149-6115     Installer     1    
133-9306 Valve Guide     1    
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g01475612
Lower the temperature of new valve seat inserts (1) .
Use Tooling (B) and a suitable press to install the new valve seat inserts in the cylinder head.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 valves and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".