Adjusting Tensioner - Grizzly G1531 Owner's Manual

Adjusting Tensioner

The belt tensioner is normally adjusted as the belt
stretches. Two good indications of belt stretch (or
a loose belt) are if the belt slaps against the platen
while running or if it slips on the rollers.
On the other hand, if the belt tension is too tight,
you will have a hard time installing and removing
the belt when the belt tension is released.
Tools Needed
Adjustable Wrench, 1 ⁄
1
2
To adjust the belt tensioner:
1.
DISCONNECT SANDER FROM POWER!
2.
Lower the work table as far as it will go.
3. Loosen the belt tension lock knob, release
the belt tension, and remove the idler roller
guard and back stop (Model G1140).
4.
Open the dust hood, then remove the sand-
ing belt from the sander.
5. Move the belt tension lever to the position
where the belt is normally tensioned.
6. Rotate the tension nut (Figure 49) counter-
clockwise to increase the belt tension and
clockwise to decrease the belt tension.
Tracking Control
Tension Nut
Figure 49. Belt tension nut and tracking control
bolt.
-34-
Qty
" Jaw Capacity ............. 1
Bolt
— Decreased Belt Tension: If you rotated
the tension nut clockwise, move the belt
tension lever to the release position. If it
is not too stiff, continue to Step 7. If it is
too stiff to move comfortably, then either
the shaft spring tension needs to be reset,
the tension shaft needs lubrication (refer
to Page 31), or the idler roller-to-platen
relationship needs to be adjusted (refer to
Platen-Roller Adjustment on Page 39).
— Increased Belt Tension: If you rotated the
tension nut counterclockwise, check the
beginning movement of the belt tension
lever. If there is no play in the first 2" of
travel, continue to Step 7. If there is play
in the first 2", then the tension shaft spring
tension needs to be reset, as described in
Resetting Tensioner Spring Tension on
Page 35.
7.
Replace the sanding belt and other compo-
nents removed in Steps 3 & 4 and examine
the effect of the tension adjustment on your
belt. Repeat the adjustment procedure if nec-
essary.
Model G1140 G1531 (Mfd. Since 08/14)