MODIFICATION 1171811 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 389-7515 Inlet Valve Seat Extractor Tool 1
B 389-7514 Exhaust Valve Seat Extractor Tool 1 Start By:
Remove the inlet and exhaust valves.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g02731130
Illustration 2 g02731132
Use Tooling (B) to remove exhaust valve seat inserts (1). Note: The bigger valve seat inserts (1) are for the inlet valves. The smaller valve seat inserts (1) are for the exhaust valves.
Use Tooling (A) to remove inlet valve seat inserts (1). Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Install new inlet and exhaust valve seat inserts (1) in the reverse order of removal. Note: The bigger valve seat inserts (1) are for the inlet valves. The smaller valve seat inserts (1) are for the exhaust valves.
If necessary, correct the seat surface with the valve seat cutter. Refer to System Operation, Testing and Adjusting, "Valve Guide - Inspect".