PRO TECHNICIAN

Inspection

Repair Valve Seat

Hand lapper
 
2. Valve lapping
(1) After valve correction is completed using the seat cutter, coat the valve seat with the compound.
(2) Mount the valve in a hand lapper and bring the valve into contact with the seat.
NOTICE:
Do not continue to rotate the valve while it remains pressed against the valve seat. Lift the lapping tool and repeat the process of rotating the lapping tool and allowing the lapping tool and valve to move downwards and contact the valve seat.
 
(3) After the work in (2) is completed, remove the compound from the valve and the valve seat.
 
3. Check
Recheck that the valve is in proper contact with the valve seat.

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