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9

Fig. 17

Fig. 16

IMPORTANT: THE TOOL IS SHIPPED WITHOUT BELT TENSION. BEFORE OPERATING THE TOOL, ADJUST THE BELT
FOR CORRECT TENSION AND PROPER TRACKING BY DOING THE FOLLOWING:

1.

DISCONNECT TOOL FROM POWER SOURCE.

2.

Loosen the two lock knobs (A) Fig. 17, and remove the top cover (B).

3.

Turn the belt tension lever (C) Fig. 18 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 deter-
mined by:

(1) flatness of the belt on the plate.

(2)  slippage of the belt when sanding heavy work.

4.

Rotate the belt (D) Fig. 19 by hand, and tighten or loosen the tracking knob (E) Figs. 18 and 19 until the belt is tracking

correctly.
5.

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 track-

ing knob (E) Fig. 18 clockwise to move the belt to the right or counterclockwise to move the belt to the left.
6.

A final adjustment can be made with the motor running. 

THIS ADJUSTMENT SHOULD BE VERY SLIGHT

.

7.

Replace top cover that was removed in 

STEP 1

.

OVERLOAD PROTECTION

The motor supplied with your sander is equipped with a reset
overload relay button (A) Fig. 16. 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. 14 to the
“OFF” position. Let the motor cool three to five minutes and
push the reset button (A) Fig. 16. The motor will then start.

A

A

B

Fig. 18

Fig. 19

C

E

E

ADJUSTING TENSION
AND TRACKING OF
THE SANDING BELT

NOTE: 

After a long period of time, adjustments may be

necessary to maintain the tension and tracking of the
sanding belt. If the belt will not hold its tension, tighten the
set screw (G) Fig. 20. If the belt will not hold its tracking,
tighten the set screw (F) Fig. 20. 

NOTE: Make only small

adjustments to these screws. Over-tightening will lock
the tension lever and/or the tracking knob.

Fig. 20

F

G

Summary of Contents for 31-280

Page 1: ...del 31 280 PART NO 406 12 651 0004 07 31 01 Copyright 2001 Delta Machinery To learn more about DELTA MACHINERY visit our website at www deltamachinery com For Parts Service Warranty or other Assistanc...

Page 2: ...get caught in mov ing parts Nonslip footwear is recommended Wear protective hair covering to contain long hair 12 SECURE WORK Use clamps or a vise to hold work when practical It s safer than using you...

Page 3: ...l workpieces that cannot be safely supported 18 AVOID awkward hand positions where a sudden slip could cause hand contact with the abrasive surfaces 19 PROVIDE ADDITIONAL SUPPORT at table height while...

Page 4: ...ircuit having a nominal rating less than 150 volts If the tool is intended for use on a circuit that has an outlet that looks like the one illustrated in Fig 1 the tool will have a grounding plug that...

Page 5: ...R USE WITH STATIONARY ELECTRIC TOOLS Ampere Total Length Gauge of Rating Volts of Cord in Feet Extension Cord 0 6 240 up to 50 18 AWG 0 6 240 50 100 16 AWG 0 6 240 100 200 16 AWG 0 6 240 200 300 14 AW...

Page 6: ...LEANING Carefully unpack the tool and all loose items from the shipping container s Remove the protective coating from all unpaint ed surfaces This coating may be removed with a soft cloth moistened w...

Page 7: ...lf of the sanding disc firmly against the disc assembly 6 IMPORTANT SECURELY POSITION THE SANDING DISC ON THE DISC ASSEMBLY PRIOR TO APPLYING POWER TO THE TOOL Fig 8 ATTACHING TOOL TO STAND 1 Use a he...

Page 8: ...ig 15 with a 3 16 diameter shackle Fig 14 Fig 15 MOVING SANDING ARM TO THE VERTICAL POSITION The sanding arm is shipped in the horizontal position Fig 12 To move the arm to the vertical position 1 Loo...

Page 9: ...e the belt to the right or counterclockwise to move the belt to the left 6 A final adjustment can be made with the motor running THIS ADJUSTMENT SHOULD BE VERY SLIGHT 7 Replace top cover that was remo...

Page 10: ...Place a square E Fig 21 on the table against the belt See if the table is 90 degrees to the belt 4 To adjust loosen the table tilting lock handle A Fig 22 Loosen the lock nut F Fig 22 and turn the ad...

Page 11: ...just loosen the two screws E Figs 25 and 26 Move the table A until the miter gauge slot is parallel to the sanding belt Tighten the two screws E NOTE When making this adjustment tighten the table lock...

Page 12: ...DISC TABLE MITER GAUGE SLOT PARALLEL TO SANDING DISC 1 DISCONNECT TOOL FROM POWER SOURCE 2 With the table A Fig 33 positioned 90 degrees to the disc place a square B in the miter gauge slot with the...

Page 13: ...h and operate the circle sanding attachment 1 DISCONNECT TOOL FROM POWER SOURCE 2 Insert the stop block A Fig 37 into the slot in the sanding disc table Line up the end of the outside edge B of the bl...

Page 14: ...he two screws C Fig 42 until they are out of the casting Loosen the other two screws H enough to allow the back panel D to hinge open NOTE The screws C and H cannot be removed 4 Release the belt tensi...

Page 15: ...at its expense and at its option any Delta machine machine part or machine accessory which in normal use has proven to be defective in workmanship or material provided that the customer returns the p...

Page 16: ...io 91761 Los Angeles 3949A East Guasti Road Phone 909 390 5555 Fax 909 390 5554 San Leandro 94577 Oakland 3039 Teagarden Street Phone 510 357 9762 Fax 510 357 7939 FLORIDA Davie 33314 Miami 4343 South...

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