Accessory Belt Tension - Terex ASV SR70 Service & Repair Manual

Rubber Track Loader
4. Maintenance

Accessory Belt Tension

Drive belts typically stretch and wear during their serv-
ice life. The fan and A/C belts should be checked for
tension, condition and presence daily prior to operating
your machine.
To check fan or A/C belt tension:
1. With the engine cold and off, remove the key from
the ignition to avoid accidental start.
2. Lift the hood at the rear of the machine and check
to make sure the fan and A/C belts are present
and in good condition. If they appear excessively
worn, or cracked, replace them.
3. Lay a straight edge across the alternator and crank
pulleys (crank and A/C pulleys for A/C belt) and
apply a force of 10 lbs. midway between the pul
leys. (fig. 4-41, 4-42)
4. Measure the distance from the bottom of the
straight edge to the top surface of each belt
(deflection). Fan belt deflection should meas-
ure 3/8" (7/16" A/C) if properly tensioned.
5. If the belts are loose or tight, adjust tension until
correct.
To adjust fan or A/C belt tension:
1. Make sure the engine is cold, off, and the key has
been removed from the ignition to avoid accidental
start.
2. Lift the hood at the rear of the machine and loosen
the bolts securing the alternator or A/C pump
slightly to allow the alternator or A/C pump
to pivot. (fig. 4-43, 4-44)
3. Once loose, use a small pry bar as a lever to force
the alternator or A/C pump against the belt(s) to
increase belt tension to appropriate level then
tighten bolts to specification. (fig. 4-43, 4-44)
4. Check the belt tension.
5. Adjust belt tension as necessary until correct.
4-41
4-42
4-43
4-12
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Bolts
Pry-bar