Service Manual

PERIODIC MAINTENANCE 2-13
Periodic Maintenance Procedures
Seat Cutter Operating Cares
1. This valve seat cutter is designed only for valve seat
repair. Therefore the cutter must not be used for other
purposes.
2. Do not drop or hit the valve seat cutter, or the diamond
particles may fall off.
3. Do not fail to apply engine oil to the valve seat cutter
before grinding the seat surface. Also wash off ground
particles sticking to the cutter with washing oil.
NOTE
○
Do not use a wire brush to remove the metal particles
from the cutter. It will take off the diamond particles.
4. Setting the valve seat cutter holder [A] in position, op-
erate the cutter [B] with one hand [C]. Do not apply too
much force to the diamond portion.
NOTE
○
Prior to grinding, apply engine oil to the cutter, and dur-
ing the operation wash off any ground particles sticking
to the cutter with washing oil.
5. After use wash the cutter with washing oil and apply a
thin layer of engine oil before storing.
Marks Stamped on the Cutter
The marks stamped on the back of the cutter represent the
following.
32° Cutter angle [A]
37.5 Cutter diameter [B]
KS8B Manufactured lot number
Operating Procedures
•
Clean the seat area carefully.
•
Recondition the valve seats with the valve seat cutters
(45°, 32°) and lap the valves.
•
Check the seats for good contact all the way around with
machinist’s dye.
•
Measure the seat width [A]. If it is more than the standard
width, the seating surface should be refaced.
If the valve seating pattern is not correct, repair the seat.