Pulley Alignment, Feed Belt Tracking

Pulley Alignment

Tools Needed:	Qty
Hex Wrenches 4 & 8mm	1 Ea
Phillips Head Screwdriver	1
Pry Bar	1

Pulley alignment is another important factor in power transmission and belt life. The pulleys should be parallel to each other and in the same plane (coplaner) for optimum performance.

Each pulley can be adjusted by loosening the set screw that secures the pulley to the shaft, sliding the pulley in/out, and retightening the set screw to lock the pulley in place.

To align the pulleys:

1.Disconnect power to the sander!

2.Open the pulley cover.

3.Looking from the top, sight down the V-belts and pulleys and check to see that the pulleys are parallel and aligned with each other (see Figure 37).

—If the pulleys are aligned, go to Step 9.

—If the pulleys are NOT aligned, perform Steps 4–8.

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4.Remove the V-belts.

5.Loosen the set screws on the motor pulley and align the motor pulley with the feed belt pulley.

6.Loosen the set screws on the sanding belt pulley and align the sanding belt pulley with the motor pulley.

7.Tighten the set screws, replace the V-belts, and repeat Step 3. Belts should be parallel and aligned as shown in Figure 37.

8.Adjust the pulleys again, if necessary, until they are all coplanar with each other.

9.Replace the pulley cover.

Feed Belt Tracking

Tools Needed:	Qty
Wrench 8mm	1
Hex Wrench 4mm	1

The feed belt must track straight. If the feed belt tracks to either side, then the tracking must be corrected or the feed belt will become damaged and have to be replaced.

Tracking the feed belt is a balancing process that takes patience and a small degree of trial-and- error. Usually you must over-tighten the loose side (the side the belt is tracking towards) to make the feed belt move to the middle of the rollers, then loosen that same side to make the feed belt stay in position. If you adjust the bolt too much either way, then you have to repeat the process until the feed belt rides in the middle and stays there dur- ing continuous operation.

Note: Tracking affects tension, so tension must

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always be adjusted after tracking.

To track the feed belt:

Figure 37. The pulleys should be parallel and

aligned.

G0458 18" Open End Belt/Drum Sander

1.Turn the feed belt ON and watch it track. If the belt moves to one side, immediately stop the machine and adjust the belt tracking. If the belt tracks evenly, leave it alone.

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