maintenance of 510

[greenhornet]

I've had my Mark V 510 since 1979, when I bought it new. About 15 years ago, I stopped using it because my job took me away from home too often. Then along the way, it went into storage for about 4 years and I finally got it back and started using it about a month ago.

On Wednesday, I was working with it when the speed dial failed to function. I decided to do some maintenace on the machine: turned it up to "fast", cut it off, etc. I pulled the speed control handle, worm gear assbly, etc., out. The worm gear would not turn easily so I cleaned it up, put some grease on it. I tried to oil the bearings in the two places suggested in the manual, but could not find the holes. I put everything back into its place, by hand turned the disk sander while turning the speed control dial back to "slow". In the process, the teeth on the speed control handle were stripped. I've ordered a new handle.

This evening, I tried turn the machine on and it just hums. What the heck is wrong? Please help me. I live in Hampton VA and am frustrated with this now.

Ray

[judaspre1982]

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[judaspre1982]

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[bluekayak]

When I picked up my Gray (1980) a couple of days ago, it just hummed when we tried to turn it on in the owner's garage. I tried it twice and just got the humming sound.

I took off the Shopsmith nameplate, reached inside, and turned the sheaves. Then it did start normally and has been running fine since then.

I'd put on a disk sander or lathe faceplate and turn the spindle while turning the speed control to the lowest speed. Then try to turn it on. However, you should know that I bought my first Shopsmith about two weeks ago and still have not used it for anything. It is starting to look better, though. You might want to get some feedback from the more experienced member first.

Jerry Floren
St. Peter, MN

[a1gutterman]

When I picked up my Gray (1980) a couple of days ago, it just hummed when we tried to turn it on in the owner's garage. I tried it twice and just got the humming sound.

I took off the Shopsmith nameplate, reached inside, and turned the sheaves. Then it did start normally and has been running fine since then.

I'd put on a disk sander or lathe faceplate and turn the spindle while turning the speed control to the lowest speed. Then try to turn it on. However, you should know that I bought my first Shopsmith about two weeks ago and still have not used it for anything. It is starting to look better, though. You might want to get some feedback from the more experienced member first.

Jerry Floren
St. Peter, MN

You might check for impacted sawdust in the motor, in and around the sheaves, etc.

Ray, you might check for the same thing...

[JPG]

Before reading what I originally posted below, read this https://forum.shopsmith.com/viewtopic.php?p=52655&postcount=15 Why he did not post it here I do not know????

Sometimes when the speed control gets out of whack the motor belt can get too far down into the control sheave and become jammed. Attempting to turn the speed control down(with the belt jammed) puts severe strain on the speed control knob. The gear teeth on the speed 'crank' only drives the speed indicator ring. It should not have become stripped by turning the speed down(unless the outer ring was positioned incorrectly).

Take the speed control 'crank' off and remove the outer speed indicator ring. Put the 'crank' back on(make sure the setscrew is positioned in the shallow hole in the worm gear hole).

Remove the belt shroud(slide it away from the headstock) and look at the motor belt. It should look similar to the second pix in post #6 in https://forum.shopsmith.com/viewtopic.php?p=52624&postcount=6

This shows the low speed positions of the motor sheave/belt. If yours does not look like that, the motor sheave is not in slow speed position.

Try and turn the motor sheaves. They should rotate fairly easily. Rotating them should also cause the output shafts to turn also.

If they do NOT turn, notice how/when/what turns and when it stops etc. and get back to us! Quit trying to start the motor for now!!!

[greenhornet]

Ok, JPG, thanks for the pix from that other post. Very helpful! The bottom sheave has the belt at the top of the sheave (I presume this means it is in "fast" speed). I found out what was binding the motor - the quadrant assbly. After finding the holes for the oil/lubrication on both upper and lower shafts and oiling them, I removed the quadrant assbly, and presto! No more binding! Ok, so now I need to know the position of the quadrant assbly, specifically, where is the worm gear in relation to the "pork chop" looking thing. Is the worm at the bottom of the pork chop or near the top? ("Top" to me would be near the end where the leaf spring is.) Also, I'm going to give you my cell number - 757-2541071. I'm in eastern time zone. Please call me. I'm unable at this point to turn the worm control shaft completely by hand. I have to start out turning it with a pair of pliers, then, about the middle, I can turn by hand, then it gets hard again and I drag out the pliers. Please call me.

Thanks

Ray

[dusty]

Does this image answer your question regarding the pork chop and worm gear?

[greenhornet]

Upon further inspection of my machine and after taking out the quadrant assbly, I've made the following observations:

1. The speed-changing belt is 1/2" wide.

2. This belt, in the "fast" position on my machine, is just above the top of the floating sheave. I believe it is supposed to be within 1/16" of the top of the sheave, right? How do I adjust this? This means the floating sheave will hit the control arm of the "pork chop". Do I need to adjust the set screw, as in "adjusting the high speed setting" in the manual?

3. I've never replaced either belt and based on my measurements so far, I don't think the belt is the problem. Right or wrong?

Call me (anybody) if you can help.

Ray
757-2541071

[greenhornet]

Yes, I see the position of the control arm to the sheaves. Thank you!