Floating Sheave Problem

[wallygoots]

Greetings,

My 510 has been acting up. The speed control stopped working, so today I took a look inside the headstock. Pretty simple setup. After a clean and lubrication as per the manual I think I found the problem.

The the floating sheave on the motor pully sticks wide open and so the belt just loosens without adjustment until it slips. Tapping it with a rubber mallet while hand winding with the sanding disk I can get it to close down. Open it back up and it still sticks.

Do you think this happened because of the cold (it's cold weather here) or because the previous owner didn't lubricate things as he should have? Also, when changing speeds, there is a spring clip that seems to get stuck on the speed changer. (I think the clip helps pull back the floating sheave on the control pulley). The clip turns sideways and binds. Is this a wearing part that needs to be replaced?

Anyhow, how much does the pully sheaves on the lower motor mount cost to replace? (If I can't get this one working). I'll have to pull the motor off the machine and see what I've got going on there and why it's binding.

Cheers,
Seth

[JPG]

Greetings,

My 510 has been acting up. The speed control stopped working, so today I took a look inside the headstock. Pretty simple setup. After a clean and lubrication as per the manual I think I found the problem.

The the floating sheave on the motor pully sticks wide open and so the belt just loosens without adjustment until it slips. Tapping it with a rubber mallet while hand winding with the sanding disk I can get it to close down. Open it back up and it still sticks.

Do you think this happened because of the cold (it's cold weather here) or because the previous owner didn't lubricate things as he should have? Also, when changing speeds, there is a spring clip that seems to get stuck on the speed changer. (I think the clip helps pull back the floating sheave on the control pulley). The clip turns sideways and binds. Is this a wearing part that needs to be replaced?

Anyhow, how much does the pully sheaves on the lower motor mount cost to replace? (If I can't get this one working). I'll have to pull the motor off the machine and see what I've got going on there and why it's binding.

Cheers,
Seth

Have you ever oiled it(the motor pulley shaft/floating sheave)? Next time it 'sticks open' put some oil on the shaft/key. Locate the oil hole, and oil it there after getting the sheave back in(closed). PS It is not a good idea to allow the sheave to bang against the fan sheave. The fan sheave may be misaligned causing the 'jam'.

Control sheave - same question(it also has an oil hole) The spring clip has its own bearing in the end or of the control sheave 'snout'. It may need oil also. All oil #1/'turbine'/3in1 oil.

It may be best to strip it down and clean all crud accumulated b3 oiling.

Have you adjusted the high speed limit? Does it stick only when run all the way to top speed, or does it stick at the highest speed set(i.e. does the spring NOT close the floating sheave from ANY setting)?

[beeg]

WHEN was the last time ya cleaned and lube it? What temp are ya trying to use the SS in? Also a pic of the spring clip would help.

[wallygoots]

... I had never used the Shopsmith before. (Just turned it on and off and heard what the speeds are supposed to sound like). This is the first time I've oiled it. When I got it I cleaned it very well, repainted the legs that were rusting. Waxed the tubes. Also have been waiting on an Arbor I can use my current 5/8" blades with. I've been working on plans for a workshop that I can use in warm and cool weather, so I haven't been building much, and thus have not used it until now.

It's freezing here. 20s-30s. This is the first time I have oiled it myself. I purchased it in warmer weather and it worked then. I should have oiled it right when I got it. At the time I was focused on getting a workable shop space.

Thanks for the feedback. I'll try to take pictures later.

Cheers,
Seth

[wa2crk]

Hi Wally
SS recommends that the shop temp be above 55 deg F. I guess you need a heater.
Bill

[wallygoots]

Interesting. So it really might just be a freeze up. That's an interesting tidbit.

Guys I'm dying without a shop. I have a car port that is uninsulated, but it's long and I've put in a request to the owners to wall off the last 8 feet and insulate for a small shop. Hope it goes through and it should be small enough to heat with a space heater. Shopsmith as you know is a small space solution. Someday we will buy a house and you know what it must feature! Shop shop!

I have a couple guitars in process... come on boss, let me at some shop space!

Cheers,
Seth

[JPG]

Interesting. So it really might just be a freeze up. That's an interesting tidbit.

Guys I'm dying without a shop. I have a car port that is uninsulated, but it's long and I've put in a request to the owners to wall off the last 8 feet and insulate for a small shop. Hope it goes through and it should be small enough to heat with a space heater. Shopsmith as you know is a small space solution. Someday we will buy a house and you know what it must feature! Shop shop!

I have a couple guitars in process... come on boss, let me at some shop space!

Cheers,
Seth

And just where is it 20-30&#176]http://www.shopsmithacademy.com/SS_Arch ... enance.htm[/URL]

This is more specific to your 'problem'. http://www.shopsmithacademy.com/SS_Arch ... rn_Pt2.htm

[wa2crk]

Wally
The combination of lkow temps and old oil will cause a problem with the sheaves moving on the shafts. A thorough cleaning and re-lubing is called for at this time. Look at it this way, spend the time to do it now and you won't have to do it again for about 20 years.
The residual oil that remains on the shafts and inside the sheave hubs will oxidize over a long period of time and form a gummy residue.
I currently have my headstock torn down and had to remove the old oil using some solvent and Q tips.
Also because I believe you said that the machine was used it is possible that someone may have used the wrong oil in the past.
BillV

[wallygoots]

I have the headstock inside warming up and I will do a thurough clean and lube. Hopefully that and warmer temperatures soon will provide for a great running Mark V again.

I must say, the belts look new. Both are Parelli. Is this the standard Shopsmith belt package were these replaced?

I look forward to taking the thing apart when it warms up. I was surprised how simple and elegant the insides of the headstock are. Very straightforward.

Cheers,
Seth

[wa2crk]

Wally
I think that I did see a Pirelli belt on one of the machines that I overhauled for my son. I do believe that both of the belts are proprietary and can not be gotten from any belt manufacturers.
Bill V