NUT- 3687510 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 166-7441 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 g01145463
Use Tooling (A) to remove valve seat insert (1) from the cylinder head.
Clean the bores in the cylinder head for the valve seat inserts. Remove any rough areas from the bores. Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
B(1) 9U-6898 Valve Seat Driver (Exhaust) 1
9U-6897 Valve Seat Driver (Inlet) 1
(1) Part of 9U-7530 Engine Tool Group
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g01079028
Lower the temperature of new valve seat insert (1).
Use Tooling (B) to install the new valve seat insert 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 and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".