Fan sheave set screw

solicitr · Post by **solicitr** » Thu Feb 07, 2008 6:24 pm

If it ain't one thing it's another. Just put on the new link belt, fired it up- and the lower pulley slammed into the motor plate. Arrgh!

Now, is there any sort of detent into which the fan sheave set screw is supposed to fit? Or is it just a pressure fit against the shaft? And if it turns out (after I remove the dang spring) that the spacer behind the sheave indeed is toast, is there a commonly-available washer or whatnot that will replace it?

billmayo · Post by **billmayo** » Fri Feb 08, 2008 12:12 am

The Sheave Spacer (#124 in parts diagram) is only available from Shopsmith. The sales ladies are familer with it and it is cheap. I am sure you could make one from a 5/8" ID tube/pipe in an emergency. I would lose them sometimes after removing the Fan Sheave until I made and used a check list for motor repair. I have spares so let me know if you cannot get one. This is a place where I use the blue LocTite on the Sheave Spacer, Fan Sheave and set screw. The Fan Sheave fits tightly againest the Sheave Spacer which fits tightly againest the shoulder on the motor shaft.

Bill Mayo

solicitr wrote:If it ain't one thing it's another. Just put on the new link belt, fired it up- and the lower pulley slammed into the motor plate. Arrgh!

Now, is there any sort of detent into which the fan sheave set screw is supposed to fit? Or is it just a pressure fit against the shaft? And if it turns out (after I remove the dang spring) that the spacer behind the sheave indeed is toast, is there a commonly-available washer or whatnot that will replace it?

a1gutterman · Post by **a1gutterman** » Fri Feb 08, 2008 2:11 am

Bill Mayo, you are a treasure to have on this forum. Your input is appreciated.

charlese · Post by **charlese** » Fri Feb 08, 2008 12:11 pm

Bill- Sorry, I had completely forgotten about that little spacer. It's simply a short length of pipe as Bill Mayo says! Ain't Bill Mayo's participation in this Forum really appreciated? You Bet!

Look around, you might find that spacer in your parts bin. It's a little thin walled pipe, about 3/4" long (plus or minus). It shouldn't have any or appreciable wear as it has no function other than to hold the sheave away from the motor.

I feel for your little difficulties as you get the headstock back into perfect working condition. To share one of my stories of woe; --- When I replaced that motor/fan sheave unit, I, at first, installed a second spacer on the shaft.

This second spacer came (was packaged) with the replacement sheave and I figured it should be used. I'm here to tell you it's really hard to get the spring back on with two spacers riding on the shaft. I know that's ridiculous, but that's how life goes around here. Lucky I realized 'something was wrong! This incident was way before the advent of the Forum and Shopsmith's new information campaign on the net. We are all better off and appreciate this Forum. Best Wishes!

solicitr · Post by **solicitr** » Fri Feb 08, 2008 1:09 pm

Does anyone have any tips for removing/replacing the motor shaft spring without an assistant?

dusty · Post by **dusty** » Fri Feb 08, 2008 2:25 pm

I have never used these procedures myself but I just called Shopsmith Customer Service with a question and was referred here:

http://www.allinonewood.com/?page=shop/serviceadvisor

Item #2 is entitled: "Replacing the Motor Spring"

solicitr · Post by **solicitr** » Fri Feb 08, 2008 2:31 pm

Thanks, Dusty. I have that one- but like all the other's I've seen it simply tells you to get a helper to hold the other end of the board. I was hoping for some way of bracing one end of the board so as to be able to do this by myself

charlese · Post by **charlese** » Fri Feb 08, 2008 2:39 pm

here Bill - take a gander at post #9. Hope it helps!
https://forum.shopsmith.com/viewtopic.php?t=1085

Putting back on is the opposite

dusty · Post by **dusty** » Fri Feb 08, 2008 2:40 pm

Sorry I couldn't be of any real help.

I understand the frustration of attempting a two person job all by yourself.

billmayo · Post by **billmayo** » Fri Feb 08, 2008 9:39 pm

I made my hardwood spring board about 3' long with the 1 3/4" hole countersunk about 1/3 of the board thickness and a 7/8" hole in the other 2/3 of the thickness of the board centered at the middle of the board. Put a 2X2 block on the wall about even with the end of motor shaft standing vertical. With the motor shaft up and about 18" from the back of the bench, I place one end of the board under the 2X2, the hole over the shaft and press down. I use my body to hold the board while I remove the snap ring. I use a small engine valve spring compressor to compress the spring on motors with a nut and remove the nut very carefully. Then use the board and release the valve spring compressor. Then carefully raise the board. I reverse the procedure to install the spring. Jacob Anderson from Va. Beach has a outstanding headstock repair DVD disc that shows how he does this task.

Look at Repair your Shopsmith Mark V headstock by Jacob Anderson
93 minute DVD video copyright 2008 Jacob Anderson Item number: 120218298327 on Ebay. You can contact him directly if desired.

Bill Mayo

solicitr wrote:Does anyone have any tips for removing/replacing the motor shaft spring without an assistant?

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