Perkins 403C-11 - Page 41

3
Workshop Manual, TPD 1458E, issue 3 - Perkins Confidential: Green 31
400 Series
To lap the contact face of the valve seat Operation 3-19
Use the valve seat cutter to obtain the correct seat contact width and seat recess on a new cylinder head, use
a valve lapping tool and lapping compound to finish.
H1052