Farmall 90 Manual page 113

6. Using a torque wrench, tighten the M 10 nut (5)
to a torque of 55 Nm (41 ft-lbs).
7. Check the tension of the Polyvee belt in the posi-
tion (1), shown in the figure 246 below, using the
CLAVIS frequency meter 380001268, bearing in
mind that the data measured must remain within
the following tolerances:
-- With the standard cooling fan.
-- Assembly tension 1100 to 1300 N (247 to 292 lbs-f)
-- Frequency measured with CLAVIS 158 to 170 Hz
-- With the cooling fan with viscostatic cou-
pling.
-- Assembly tension 1250 to 1450 N (281 to 326 lbs-f)
-- Frequency measured with CLAVIS 177 to 191 Hz
8. If the measured data are out of tolerance, repeat
operations 5 to 7 described above and check that
the measurements come within the prescribed
tolerances.
9. Using a torque wrench, tighten the M 10 nut (3)
to a torque of 55 Nm (41 ft-lbs).
10. Using a torque wrench, tighten the M 8 nut (2) to
a torque of 25 Nm (18 ft-lbs).
NOTE: When fitting a new belt, check the tension
again after 50 hours of running.
SECTION 10 - - ENGINE - - CHAPTER 1 113
245
246