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Re: Newowner Informaton

#265916 by JPG » Sat Dec 28, 2019 11:48 am

DGear74 wrote:Maintenance, speed control, headstock

Bought a used mark v, 1979 was the year or manufacture I believe. I was trying to clean up the inside of the headstock and fix a sticky speed control and took the speed control off...not according to the instructions (this was before I realized the wealth of information out there about the machines). The speed control doesn’t turn easily, I had to really crank on it to turn. It shouldn’t be like that right? Should I replace that part?

Should I go ahead and take apart the whole headstock to clean and lubricate? The machine was kept outside and only turned on three times by the guy I bought it from. It runs, but flipped breakers a couple times. Thanks for the help.



YEP!!!!

After cleaning,

#10 machine oil.

Powdered graphite.

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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: Newowner Informaton

#265970 by beeg » Sun Dec 29, 2019 6:33 pm

First off don't turn the speed dial unless the spindle is turning. Go slow from fast to slow. You also may need this.

Attachments

how to do a high speed adjustment.PDF
(382.25 KiB) Downloaded 1345 times

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SS 500(09/1980), DC3300, jointer, bandsaw, belt sander, Strip Sander, drum sanders,molder, dado, biscuit joiner, universal lathe tool rest, Oneway talon chuck, router bits & chucks and a De Walt 735 planer,a #5,#6, block planes. ALL in a 100 square foot shop.
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Bob

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Re: Newowner Informaton

#265990 by everettdavis » Mon Dec 30, 2019 1:48 pm

Yes in addition to the file Bob provided you might benefit from reading an expanded version of the process with photos that was assembled from work and posts from our late friend and my mentor, Bill Mayo.

Goto viewtopic.php?p=185690#p185690

Scroll down the page, find and download file using the link "Bill Mayo - Mark V Headstock Improvement - Repair Kit for Speed Control and Eccentric Bushing v1.01 13 Jun 2016.pdf"

You reference the wealth of information out there.... Have you seen Jacob Anderson's free YouTube videos? If not, you may find some help there.

https://jacobshopsmithrepair.com/youtube-videos/

He has 39 of them and counting.

Here's some of those titles that I think you might like to review:
How things should look
Solving speed control problems stuck sheaves
Headstock teardown Part 1
Headstock teardown Part 2
Headstock teardown Part 3
Headstock teardown Part 4
Speed control components
Setting the speed control

Take and post pictures when you can. We love photos here. To learn how to post pictures in the forum see: viewtopic.php?p=224932#p224932

Kindest Regards,

Everett

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Re: Newowner Informaton

#266538 by DGear74 » Tue Jan 14, 2020 11:02 pm

Thanks for the info Gents!

Got it broken down and cleaned by following the Jacob Anderson videos. I ended up replacing the quill bearing, drive gear bearings, drive sheave and bearing, worm gear, quadrant. I put paste wax on the metal parts after I cleaned them.

Last thing I have to do is put the speed control back on, which leads to my next questions.

1) What is the correct speed to try to set the machine to before turning it on?

2) I noticed that my drive gear spins in an oval, it is a gilmer belt. Is this normal? I don't want to turn it on till I know its not gonna break or ruin anything.

3) How smoothly should the worm gear roll over the quadrant? With the assembly off the machine, I have to use channel locks or vice grips to turn it and about 1/3 of the way down the quadrant it gets near impossible to turn. I noticed that my worm gear moves in and out some, I only have a thin washer that is a little concave and the retaining clip on it.

I'll get some pictures in the next couple days.

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Re: Newowner Informaton

#266570 by DLB » Wed Jan 15, 2020 6:02 pm

It is very important to never adjust the speed control unless the shafts are turning. (They can be turned manually if necessary, a sanding disc is useful for this.) This to prevent damage, usually to the speed control.

1) The manuals say to always turn the speed to the slowest setting before turning it off, and to only turn it on at the slowest setting. That said, many of us do not adhere to this all of the time. For example if I am sawing and/or Jointing I leave my machine on the appropriate speed for those operations and just turn the power on and off. IF my circuit breaker tripped when I did this then I would need to slow the machine down for the power cycles. But for shop safety and to prevent damage to equipment, do not over-speed whatever is attached.

2) I'm not understanding when you say your drive gear spins in an oval. I'm not sure what you are calling the drive gear. A picture of what you are looking at would help here. But I think that is bad. (If your machine has a Gilmer belt it is probably not from 1979. Gilmer belts went away from new production around 1960.)

3) The speed control should move very easily over the full mechanical range of the quadrant, especially uninstalled. Anything different from that is pointing to an underlying problem. I believe you should have one more washer on your worm gear, there is usually a spring washer, a washer, and a retaining ring (in that order), but I doubt if this is the problem. Check for galling where the worm gear rotates inside the bracket, ensure that the mounting arms (for the quadrant) on the bracket are straight, etc. Basically you'll need to isolate the source of the mechanical resistance. The quadrant needs to swing straight to retain proper alignment with the worm gear or it starts binding, this would be my first guess so look very closely at those mounting arms.

Suggestion: Consider starting a new thread for these maintenance concerns on your machine.

Good Luck!
David

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Re: Newowner Informaton

#266711 by DGear74 » Tue Jan 21, 2020 12:03 am

Wasn't able to find a washer small enough to fill the gap between the washer and retaining clip. It was probably .010 in. Re-installed quadrant/speed control assembly and turned it on. The high speed stop was set so that the set screw was flush with the jam nut. I double checked that the worm gear wasn't going to turn off the teeth onto the porkchop before reinstalling. Turned it on and the motor started running up to a very high speed. Started turning it down and about mid speed, the sheave is hitting the quadrant. Looking through the posts I have not come across anyone having this issue.

Thanks for the help, I haven't forgotten to take the pictures, just haven't posted them yet. Work on the machine or take pictures of it...

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Re: Newowner Informaton

#266715 by JPG » Tue Jan 21, 2020 8:35 am

Please continue this discussion @ viewtopic.php?f=10&t=23250

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╔═══╗
╟JPG ╢
╚═══╝

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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