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W1737/W1738 Owner's Manual (Mfg. 10/09+)
SERVICE
Figure 48. Tracking safety switch
adjustmentbolt.
Belt tracking safety switches are placed on both sides of
the belt to act as emergency machine stops if the belt
travels too far to one side during oscillation. See Figure
48.
To adjust the belt tracking safety switches, do these
steps:
1. TURN OFF and LOCK the master power switch so
that no power can go to your sander!
2. Make sure the belt tracking and oscillation is
adjusted.
3. Release the belt tension, center the sanding belt on
thetoproller,thenre-tensionthebelt.
4. Measure the distance from the edge of the sanding
belt to the ceramic rod protruding from the switch.
5. LoosentheadjustmentboltshowninFigure 48, and
move the switch so the belt and the ceramic rod have
approximately 1⁄2" clearance from each other.
6. Tightentheboltandrepeattheadjustmentwiththe
other side if necessary.
7. Start the sander and make sure it is working
properly.
Adjustment
Bolt
Figure 49. Belt tension safety switch
location.
Belt Tension Safety Switch
The belt tension safety switch shuts the sanding motor
OFF if the belt breaks or has no tension when the lock
flange pushes the belt tension safety switch lever. See
Figures 49 and 50.
To adjust the belt tension safety switch, do these
steps:
1. TURN OFF and LOCK your master power switch.
2. Applynormalsystemairpressureof70PSI, and
tension the belt.
3. Loosenthemountingscrewandpositiontheswitch
so the lever is in the center of the lock flange hole.
4. Re-tightenthescrewandtesttheswitchoperation.
Belt Tension
Safety Switch
Figure 50. Belt Tension safety switch.
Lock
Flange
Switch
Lever
Mounting
Screw
Belt Tracking Safety Switch