Motor runs but the drive drum that hold the sanding belt does not turn.
The motor runs and the belt pulleys are fine, but the drive drum for the sanding belt does not turn. I am unable to get the drum off of the sander to determine what is not working properly. I know the nuts are left hand, but they are recessed into the drum itself.
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Re: Motor runs but the drive drum that hold the sanding...
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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With power off start the ribbed belt on the motor pulley, insert allen wrench into cutter head shaft. slowly rotate cutter head while feeding belt onto cutter head pulley. While rotating head, alternate between pulleys feeding it on one rib at a time. Softening the belt in hot water is NOT necessary to install the belt in this fashion.
most belt sanders are simular,if you have right size belt,there should be a lever between the belt wheels,pull lever out,put belt on,then close lever,some also have adjusting knob,turn clockwise to tighting.
I take it that the rear drum stopped turning and if so the drive belt or one if the pulleys could be your problem. I would be doubtful if the gears are stripped. Give me the model number and brand and I will find a schematic for you. If this is the Porter Cable sander. on the side with the black cover you will find 3 screws that you can remove, UNPLUG tool first and take a quick look to maybe find your problem. Let me know if I can help further
It would take 6" pully w/ a 2.25" which would not fit on that machine, no room for the 6". Replace with the same RPM motor is the proper way, unless you simply want a slower speed sander, duh! You cannot change the motor rpm without a defenant power issue, if you change the rpm your sander will power out, sorry?
Hi, Consult your user manual for the instructions to install a new belt. Follow these instructions selectively to tighten the belt tension. Here they are....
CHANGING DRIVE BELT
Using a phillips head screwdriver, remove the two screws in the center of the pulley cover. Remove the cover. Raise sanding belt to the vertical sanding position. Next, loosen the hex head set screw. Raising the motor pulley releases the belt tension. Remove the old drive belt. Fit the new drive belt on the drive pulley first and then on the motor pulley. Test belt tension by squeezing the belt with your fingers. Adjust the belt tension with the hex head set screw until there is about 1/4 in. (6 mm) of give. Tighten the belt tension nut securely. Note: Excessive tightness on the drive belt may cause increased noise and overload the motor. Excessive looseness on the drive belt may cause the drive belt to fail prematurely and make a severe chattering noise. Using a phillips head screwdriver, reinstall the pulley cover and the two phillips head screws. Tighten securely.