New Holland 667TA/EBF, Repair Manual

Page: 129 / 150

2-111
87519804 NA Issued 11-06 Bur
CHAPTER 2 - 667TA ENGINE OVERHAUL
ENGINE REPAIR MANUAL
STEP 135
BS06K365 Figure 2-238
MAIN DATA ON VALVE SEATS
If the valve seats cannot be reseated, just by
grinding, replace them with replacement parts. By
using tool (1, in step 134) to remove as much
material as possible from the valve seats (taking care
not to damage the cylinder head) until they can be
extracted from the cylinder head using a punch.
STEP 136
BS06K366
Figure 2-239
After the reconditioning operations, verify by means
of base (2) and dial indicator (1), that valve hollow (3)
corresponds to the specified value.
Heat the cylinder head to 80° to 100° C
(176° to 212° F) and using the proper beater, install
the new valve seats (previously cooled) into the
heated cylinder head.
Recondition the valve seats with tool (1 in step 134)
according to the values shown in figure 2-238 above.
3
2
1