Farmall 90 Manual page 126

126
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MIF1052A
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MIF1051A
If the valve seats cannot be reconditioned by just re-
grinding, they can be replaced with the ones supplied
as spare parts. Using a specific tool and taking care
not to nick the cylinder head, remove as much mate-
rial as possible from the valve seats until it is possible
to extract them from the cylinder head with the aid of
a punch.
SECTION 10 - - ENGINE - - CHAPTER 1
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Dimensions (mm) of valve seats
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Dimensions (mm) of valve seat housings
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Heat the cylinder head to 80 to 100 °C (176 to
212 °F) and, using a suitable drift, insert the new
valve seats, previously cooled.
Then regrind the valve seats according to the values
given in Figure 271.
A = Exhaust valve.
B = Inlet valve.
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271
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272