ASV PT-80, Operation And Maintenance Manual

Page: 44 / 72

Accessory Belt Tension
Drive belts typically stretch and
wear during their service life.
The fan and A/C belts should be
checked for tension, condition
and presence daily prior to oper-
ating your machine.
To check fan or A/C belt tension:
1. With the engine cold and off,
remove the key from the igni
tion 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 pul-
leys (crank and A/C pulleys
for A/C belt) and apply a
force of 10 lbs. midway
between the pulleys.
(fig. 1, 2)
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 prop-
erly 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 igni
tion 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. 3, 4)
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 tight-
en bolts to specification.
(fig. 3, 4)
4. Check the belt tension.
5. Adjust belt tension as
necessary until correct.
MAINTENANCE
Accessory Belts
43
2
3
1
Bolts
Pry bar