Valve Seat Touching Position Inspection - Carter Talon 150 FX Series Service Manual

• Ream the upper angles of the valve seat working surface
with a 30°milling cutter.
• Ream the lower angles of the valve seat working surface
with a 60°milling cutter.
• Finally, ream the valve seat to the specific seat width with a
45°milling cutter.

VALVE SEAT TOUCHING POSITION INSPECTION

Apply a thin layer of fluid on the valve seat, and put the valve on the seat and rotate jointly, then
take out the valve and observe the contact surface on the valve face. If the contact position is too
high, then cut out some of the upper part of the valve seat with a 32°milling cutter to reduce the
working face of the valve seat.
• If the contact position is too low, then cut out some of the lower
part of the valve seat with a 60°milling cutter to raise the working
face of the valve seat.
• Finally , mill the working face of the valve seat to the specific
width with a 45°milling cutter.
• If the valve seat still cannot contact evenly with the valve after
trimming, the valve should be revised or replaced.
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