Retainer Loop of Control Sheave?

[pjkovie]

I have an old machine and not quite such what model it is. I'm guessing a Mark V 500 that I bought around 1980 -81. Anyhow, The headstock started making a squealing noise when I shifted to low speed. Now that I took it apart to replace the bearing (which was shot) my retainer loop is different from what I found online, both @ Shopsmith and Ebay. My retainer (which looks and is bent) has the spring "roller" coil at a 90 degree leg - not opposite the loop opening. If this loop is supposed to engage with the inside of a roll pin, there was no roll pin found inside the motor compartment. (See Pictures) The drilled hole through the button is .140 diameter which would allow a 1/8" roll pin to float and rotate inside the hole. The loop material is .0625 diameter. There is also a smaller loop with a smaller roller coil that is severely bent(I think). This was found down next to the motor assembly. This material is .042 diameter. Comparing what I have seen as an assembled bearing with the retainer loop (pic) to what I have, is much different. The smaller loop is a total mystery.
Has anyone seen something like what I have here? I have no manuals as to the correct part numbers or proper assembly.

Any help or links to the information that I require would be much appreciated!

Thanks in advance for your consideration and sharing of any knowledge that you can pass along.

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Bearing with Loop.png (113.9 KiB) Viewed 3920 times

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[JPG]

The total mystery(0.042) is the anti-rattle spring that is normally under the outer indicator ring of the speed control.

The loop part is a mystery why the coil is not where it belongs. If this is OEM, SS needs to be informed(defective part!).

[chapmanruss]

pjkovie,

Welcome to the Shopsmith Forum.

As JPG already said the mystery part "is the anti-rattle spring that is normally under the outer indicator ring of the speed control." Its location is shown in the picture below.

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Speed Control Spring.jpg (87.24 KiB) Viewed 3885 times

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The Loop generally fails like that because the bearing is failing too. The coil being on the one side is wrong but being an older Mark V I doubt they would replace it. The misplaced coil is very unlikely the cause of the failure. You have already found the options for this repair. You could go with replacing the Control Sheave purchased from Shopsmith or the Button Bearing which includes the Loop. For the Button Bearing/Loop replacement the old one must be removed and the new one pressed in. It appears, in your case, the old one has already been removed. The roll pin likely fell through the vent in the bottom of the Motor Cover.

If you bought your Mark V in 1980 or 1981 it would be a Mark V with the original Table System AKA 500 unless it has had a Table/Fence System upgrade.

I would recommend getting a manual for your Mark V. Shopsmith sells a Mark V 500 manual part number 845435 ($29.99) here on the website under Manuals & Information. The other option is buying a used manual. A used one may be an older one from the 1970's or before and not as inclusive as the one Shopsmith currently sells. If buying a used manual find a later (1980's or later) one for the Mark V 500.