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V-belt replacement

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Re: V-belt replacement

#257777 by reible » Wed Mar 06, 2019 9:05 pm

reible">

reible Platinum Member (10310 Posts)
Location: Aurora, IL

You have an older headstock then I'm use to but I'm guessing there are a few things I would look at starting with the mounting of the motor. Perhaps it is time to drop the pan and motor and see if anything looks out of place. Maybe something bent or holes enlarged, screws loose, anything at all that would cause it to be that misaligned.

I'd go to the guy on ebay, heard only good things about his job.

Ed

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{Knight of the Shopsmith} [Hero's don't wear capes, they wear dog tags]

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Re: V-belt replacement

#257782 by JPG » Thu Mar 07, 2019 2:39 am

JPG">

JPG Platinum Member (30732 Posts)
WLM: JPG40504@YAHOO.COM Location: Lexington, Ky (WILDCAT territory)

I think the motor pan is bent out of shape and the major cause.I no longer think that

I also think the belt is contributing to the propensity to rub(non oem-slightly wider-slightly longer).

A new(used) motor pan may correct.Not needed

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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10E(SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange

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Re: V-belt replacement

#257786 by dusty » Thu Mar 07, 2019 4:03 am

dusty">

dusty Platinum Member (19038 Posts)
Location: Tucson (Wildcat Country), Arizona

Looking at the very last image posted leads me to say the motor is not properly oriented in the motor pan. I'd "loosen" the four screws that secure the motor in the pan the then check to see if you can move the motor around so as to achieve alignment of the shafts.

Good luck. Hope you can avoid buying parts.

Save that money for tools.

Just to give you a different perspective:

: Shaft and Tube Relationships CORRECTED COPY no reference lines.png (50.87 KiB) Viewed 8534 times

Nothing is specifically identified. Prepared for my own needs. You will have to use your imagination.

The dashed lines forming a triangle mark the path that the belt would be on.

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"Making Sawdust Safely"
Dusty
Sent from my Dell XPS using Firefox.

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Re: V-belt replacement

#257790 by wa2crk » Thu Mar 07, 2019 8:36 am

wa2crk">

wa2crk Platinum Member (2911 Posts)
Location: Leesburg, Fl

The pictures with the plumb line tell all. It is possible that the end bells of the motor were installed improperly by a previous owner. Check the motor mounts to make sure that the correct ones are used and that the motor "feet" are properly orientated.
Bill V

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Re: V-belt replacement

#257796 by roneg » Thu Mar 07, 2019 12:08 pm

roneg Gold Member (101 Posts)

Thanks all for your input. Thinking back.. The person I bought this machine from 2 years ago mentioned that his Dad did, or had done, a Motor rebuilt in the past. So yea, anything is possible here. I have noticed the motor plug and wire is not original. It is longer and of a flat type, with no grommet, at the pan entry point. Looks like a motor removal is in my future. :rolleyes:

wa2crk wrote:The pictures with the plumb line tell all. It is possible that the end bells of the motor were installed improperly by a previous owner. Check the motor mounts to make sure that the correct ones are used and that the motor "feet" are properly orientated.
Bill V

By end bells, I suppose you mean the metal ends at each end of the motor housing? The one shown in the last two pictures.

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"The older I get..The better I was"

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Re: V-belt replacement

#257986 by roneg » Thu Mar 14, 2019 2:49 pm

roneg Gold Member (101 Posts)

Dis-mounted the motor, and assy. The pan does not appear bent (the belt cover fits snug all the way around), the motor mounts seem to me normal. Don't know the normal distance between the waytube, and belt (not in any diagram I've seen). I'm thinking of installing a couple of split washers between the pan, and motor mounts to "wedge" it over the direction it needs to go, then screwing in down with new longer screws. Good idea?

Couple of things I noticed, with the parts exposed upon motor removal. The switch wires have been coming in contact with some moving object (rubed through insulation)..I'm guessing Main belt. Is there some diagram, or routing..wire clip, or suggestions? Also since there is no color coding on my motor wires, and none on the pig tail what is the proper way to wire the (new switch), to motor? I will be installing a new/used pigtail with quick dis-connect connectors Blk, Wht, Grn also.

Thanks,
Ron

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"The older I get..The better I was"

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Re: V-belt replacement

#257987 by dusty » Thu Mar 14, 2019 4:22 pm

dusty">

dusty Platinum Member (19038 Posts)
Location: Tucson (Wildcat Country), Arizona

That being the case, I'd like to hear about what you see if you rehang that plumb bob. What are the dimensions from the string to the tubes. Whatever the distance is should be the same. That is, the plumb bob should hang straight down the center line.

: Shaft and Tube Relationship with Plumb Bob.png (37.61 KiB) Viewed 8382 times

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"Making Sawdust Safely"
Dusty
Sent from my Dell XPS using Firefox.

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Re: V-belt replacement

#257990 by JPG » Thu Mar 14, 2019 6:35 pm

JPG">

JPG Platinum Member (30732 Posts)
WLM: JPG40504@YAHOO.COM Location: Lexington, Ky (WILDCAT territory)

I would be interested in a pix of the bottom of the motor pan showing the motor mounting screws.

BTW I recommend adjusting the eccentric the other direction to tighten the poly-v belt.(from 6 to 9 rather than 6 to 3)

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Re: V-belt replacement

#257992 by JPG » Thu Mar 14, 2019 9:16 pm

JPG">

JPG Platinum Member (30732 Posts)
WLM: JPG40504@YAHOO.COM Location: Lexington, Ky (WILDCAT territory)

Never mind!

I tore into my vintage specific(sorta*) "A" headstock and found the following.

The motor IS off set towards the operator side by about 5/16"(a straight edge laid against the operator side of the main and idler shafts intersects the center of the motor shaft).

The v belt is riding slightly above the outer rim of the motor pulley at "fast".

The belt clears the way tube by about 1/4".

*The main and idler shaft are poly-v.

*However the motor has been spaced up off the motor pan by 1/4" to allow using a stock 26" belt. I do not think that affects the other details significantly although it may decrease the offset(standard belt would be further off set very slightly).

Does not explain a belt rubbing the tube, but does clear up the offset is 'normal'.

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Re: V-belt replacement

#257993 by roneg » Thu Mar 14, 2019 9:36 pm

roneg Gold Member (101 Posts)

Very interesting JPG. So it would appear the mis aleighnment is normal. However I'm confused how the belt can help but rub when running at high position on the motor sheve.

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"The older I get..The better I was"

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