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Pierre Bilodeau Posted on Sep 27, 2011

Need part for Mastercraft belt sander 54-7240-8 I need to replace the belt on the motor that drives the belt drive assembly. The motor runs ok but, the wheel that drives the sanding belt doesn't turn the 2X21 sandpaper belt.

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Anonymous

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  • Posted on Oct 10, 2012
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Anyone has a broken belt sander 54-7240-8 within Canada? I could use a particular part from it to fix mine. If you do, email me at [email protected]
Thanks.

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stug_57u

Stuart

  • 99 Answers
  • Posted on Oct 25, 2008

SOURCE: pad on 9045B sander

Remove the bottom faom pad, which should just be held on with phillips screws. Under this you will see the eccentric weight that has a screw in the middle. Not sure if it is left hand thread or not so be carefull. It is normally thread locked aswell so be firm but fair when unscrewing it. Once it's out you should be able to lever the weight of by applying equal pressure to each side of it. It will be centered on a woodruff key so be cartefull not to lose it. Also, in between this part of the base and the main body of the machine there is a rubber skirt that is clamped to both parts. Unscrew the band clamping the skirt to the base and I think you should be able to pry it apart then.

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Editor925

Dean

  • 285 Answers
  • Posted on Mar 18, 2009

SOURCE: belt won't stay on belt sander

Check first that you have retensioned the belt... i.e. when you removed the other belt, you would have had to pull on a spring-loaded lever to remove the belt tension before you added the new one... make sure the tension lever is flipped back in to ensure the new belt is tensioned...

Next, and the likely problem you are having, is belt tracking... There should be an adjustment knob up near the front of the sander near the front roller, either on top of the front part of the sander, or to the side near the front roller... When you turn this knob, it makes the belt track either left or right over the sander's base. This knob will allow your belt to run square and true and not spin off to one side...You need to adjust the tracking using this knob while the belt sander is running and with the new belt tensioned and in place, so turn the sander upside down, and power it on with one hand, then turn the knob with the other hand whichever way is needed to have the belt track square and in the middle of the rollers. Make small adjustments on the tracking knob to begin with. They can be sensitive at times.

That should stop your belt spinning off to one side.

efs_perpends

efs_perpends

  • 1997 Answers
  • Posted on Apr 02, 2009

SOURCE: Porter Cable 352V belt sander eats belts

I've never had any particular problems with norton belts. All belts will require some adjustment as they wear in,however.
Try this: Put a new belt on, turn the sander upside down and rest it on the front handle. Get a good grip on the rear handle and turn it on while you use your other hand to turn the tracking adjustment. Just center the belt on the drum. I don't know what the manual tells you to do, but that's what matters, that the belt rides across the platen without hanging out loose in space or running up against the housing of the machine. If it does ride in against the housing, and you don't track it away, eventually you'll have a groove worn right through the side of the machine.
If you try this, and it still doesn't work, make sure the drums are secure and look right. Is it possible the machine was dropped and the drum bent? If so, parts will have to be replaced.
The only other cause I can imagine is that there is some kind of something jammed inside the housing that is protruding into the belt pathway that they're getting caught on, but that seems unlikely. Check anyway. Look with a flashlight.
There are better belts available than Norton, but they should work.
Some belts have an arrow on the inside of the belt indicating the direction of travel. Make sure if yours does, that you put it on that way. I try to install them so the joint will tend to ride up over the work instead of the work tending to want to tear the joint apart, but this is not always obvious, depending on the mfr.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

efs_perpends

efs_perpends

  • 1997 Answers
  • Posted on Apr 02, 2009

SOURCE: THE BELTS ON MY MASTERCRAFT OSEILLATING SANDER ARE WARN OUT

Maybe you can use a linked belt. Take a look at this link
(pun intended)

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take a moment to kindly rate this post....thanks!

Anonymous

  • 384 Answers
  • Posted on Jun 16, 2009

SOURCE: I have a Ryobi 4x36 Belt Sander (BD4600). I've

Look for plastic build up in the motor. Try to air blow motor and belt drive.

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Instead of removing the drum, remove the belt and the cover over the gearbox. The gearbox cover is normaly fixed in place by screws around the drive pulley. There may be a couple of screws under the pulley, if so they can be accessed via holes in the pulley wheel itself. Check for worn or stripped gears. These gears can be replaced if need be, but if this is the case make sure you remove and clean out all the grease first and replace that aswell as it may contain bits of teeth that have come off the faulty gear. As far as I know belt sander drive rollers can not be removed without removing the drive inside the gearbox first.
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