Model #31511781 CRAFTSMAN Sander

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Question and Answers

Q:

belt sander - an oldy but a goody-315.11781 - belt replacement help

A:

Thank you for your question and I understand your concern.
 
I added a link to the Owner's Manual of the same or similar model that may be helpful.
 
The cap screw securing the blower has RIGHT HAND threads. To loosen the cap screw, turn the cap screw "CLOCKWISE". Once the cover is off, you should be able to hold the belt or blower and then loosen the cap screw. Remember to loosen the cap screw by turning it Clockwise.
 
 I hope this is helpful. If I may be of further assistance as more details become available, please reply to this post. 

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Joey S -
Sears Technician
August 27, 2013
A:

That manual is really helpful. The issue is that it appears that part 59 - the blower housing won't come off without removing the rotor first. There is a piece behind the rotor separating the belt housing (38) from the blower housing (59). Knowing which way it turns will let me be more forceful with it. I'll try to get a belt or something around the rotor to hold it. There doesn't seem to be a good solution at this point.

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steve -
August 27, 2013
A:

I was able to force a blade around the seam between the outer and inner housing (it did seem to be glued) to get the outer housing off, and was then able to grab the base of the blower housing with a large Visegrip and then turn the screw clockwise with a 3/16 inch Allen wrench. The Allen head screw (cap screw) has a left hand thread so it screws on counterclockwise, and off, clockwise. I also found two screws loose under the driven sprocket (the larger pully) which caused it to rub on the housing, and was able to tighten them by coming at them from the side under the sprocket.

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Richard -
July 29, 2015
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Q:

Cog Drive Belt for 4 x 24" belt sander... needed... 315.11781 Craftsman belt sander

A:

Ordering the timing belt for the Craftsman belt sander is made easy by going to the link provided below. Hope this is helpful information. Additional information may take two business days.

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Anna T -
February 25, 2013
A:

Thank you for your question. I am sorry you are having problem with the belt sander. To replace the belt you have to remove the blower housing and blower first. In the image below the blower, housing and blower are marked in the red box. Once it is removed you can take the belt cover off. The below cover is in the greed box. After you have the cover removed,you can clean out any remnants of the old belt. Then you can walk the new belt onto the pulley. This is the tricky part because the belt is made to be tight. First, put the belt on the small pulley. While you hold the belt on that pulley, hook one edge of the belt on the large pulley. Then slowly turn the pulleys while you hold the belt on the pulleys. Once you have it on the pulleys give it a few turns to make sure the belt is tracking properly. If it is, you can reassemble the unit and check the operation. I hope this is helpful. Please let me know if you need further assistance.   Thank you for using Manage my life. Mark T.

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Mark T -
Sears Technician
February 26, 2013
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