Delta (Model 31-300) instruction manual Locking Switch in the OFF Position, Overload Protection

LOCKING SWITCH IN THE “OFF” POSITION

IMPORTANT: When the tool is not in use, the switch should be locked in the “OFF” position to prevent unauthorized use, using a padlock (A) Fig. 17 with a 3/16" diameter shackle.

OVERLOAD PROTECTION

The motor supplied with your sander is equipped with a reset overload relay button (A) Fig. 18. If the motor shuts off or fails to start because of overloading (sanding too heavy, using a worn sanding belt or disc, using the sander beyond its capacity), or low voltage, turn the switch (A) Fig. 16 to the “OFF” position. Let the motor cool three to five minutes and push the reset button

(A) Fig. 18. Start the motor.

ADJUSTING TENSION AND

TRACKING OF THE BELT

IMPORTANT: The machine is shipped without belt tension. Before operating the machine, follow these instructions for adjusting the belt for tension and tracking.

DISCONNECT MACHINE FROM POWER SOURCE.

1.Loosen the two lock knobs (A) Fig. 19, and remove the top cover (B).

2.Turn the belt tension lever (C) Fig. 20 counter-clockwise to increase the belt tension. NOTE: The tension lever (C) is spring-loaded and can be repositioned by pulling out the handle, moving it, and letting it spring back into position. Correct tension is determined by:

(A) flatness of the belt on the plate.

(B slippage of the belt when sanding heavy work.

3.Rotate the belt (D) Fig. 21 by hand, and tighten or loosen the tracking knob (E) Figs. 20 and 21 until the belt is tracking correctly.

4.Turn the tool on and off to check for proper tracking. If the belt is leading to one side or the other, very gently turn the tracking knob (E) Fig. 20 clockwise to move the belt to the right or counterclockwise to move the belt to the left.

5.A final adjustment can be made with the motor running.

THIS ADJUSTMENT SHOULD BE VERY SLIGHT.

6.Replace the top cover that was removed in STEP 1.

B

A

Fig. 19

E

C

Fig. 20

D

E

Fig. 21

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