Coolant Pump And Generator Drive Belts - Farmall 90 Manual

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Op 10 414 10
COOLANT PUMP AND GENERATOR
DRIVE BELTS
Adjusting Tension
CAUTION
Handle all parts carefully. Do not put your hands
or fingers between parts. Wear the prescribed
safety clothing, including goggles, gloves and
safety footwear.
Rules for Tensioning the Polyvee Belt
To adjust the Polyvee belt (1) governing the fan --
coolant pump -- oil pump and alternator pulleys, pro-
ceed as follows:
1. Check that the belt (1) is correctly positioned on
the belt tensioning device and on the pulleys.
2. Loosen the screws (2) and (3) retaining and piv-
oting the tightener to the cover (6).
3. Loosen the locking nut (5) and the screw for ten-
sioning the belt (4), checking that its thread is not
defective and has no oxidized/painted parts that
would affect its rotation in its seat in the cover (6).
4. Turn the screw (4) and lightly tension the belt (1)
with the tightener.
5. Using a torque wrench, adjust the tensioning
screw of the belt (4) to the following torque set-
tings:
-- With the standard cooling fan
-- 3.8 to 4.4 Nm (2.80 to 3.25 ft-lbs).
-- With the cooling fan with viscostatic
coupling
-- 4.3 to 4.9 Nm (3.17 to 3.61 ft-lbs).
SECTION 10 - - ENGINE - - CHAPTER 1
244