Unverferth 2070
— Set Up
1-65
25. Belt tension is adjusted with hex
nuts below the spring, FIG. 1-102.
All belt tension MUST be released
from linkage. Loosen outer hex nut
and adjust inner nut to establish a
3 1/16" pre-load dimension between
the heavy washers. Tighten the outer
hex nut against inner nut to lock
position. Check the lower belt pul-
ley to ensure belts are aligned in
their grooves and with the tensioner
handle, engage the roller/idler linkage
against the belts and over-center stop.
The compressed spring should now
be approximately 1 3/4" between the
washers and generating a force of ap-
proximately 480 lbs. (218 kg.) against
the belts. Release and tighten belts
multiple times to confirm positions
and final adjustments. See FIG. 1-103
and FIG. 1-104.
26. Tighten belt to retain them into the
lower pulley for cover guard assembly.
Reinstall the cover guard and the PTO
shaft to the gearbox input shaft. Clear
work area and test run drive train for 3
minutes at no greater than 1000 RPM.
27. Disengage PTO and turn off tractor.
Through the cover access door, check
the compressed spring length (1 3/4")
between the washers and check each
belt for uniform tension. If more adjust-
ment is needed refer to Step 27. If no
additional spring adjustment is available,
then both belts must be replaced with
a new match set.
NOTE: Always replace belts in matched sets.
28. Pulleys must be aligned with the fixed
idler. Belts should be centered on idler
for longest belt life.
29. After tightening taper-lock bushing
hardware, lay a straight edge across
face of the drive and driven belt pul-
leys to ensure alignment between the
grooves on the pulleys.
Use hex nuts to
adjust tension
Handle in
down position
Handle in
up position
Auger Assembly
(Continued)
FIG. 1-102
FIG. 1-103
FIG. 1-104
