another question about removing a different pulley

[steve-in-ga]

I have to remove the output pulley off the same gearbox so I can remove the gearbox to fix a seal leak. This pulley looks different than the taper lock setup on the input shaft. This one is also very rusty. There are 3 sketchy looking bolts, but no extra threaded holes to push the hub from the pulley )(first picture). These bolts also look like they go through the pulley and possibly into the housing (second picture). The key also looks like it's welded to the hub.

How should I approach removing this pulley?

thanks again in advance for your help
Steve

 

[BarnyardEngineering]

It's a taper lock pulley just like the other one.

Good luck getting that barnacle apart, is all I can say. The end of the shaft has been beaten and mushroomed over. Looks like it's been soaking in salt water for a decade. Those bolts are never going to thread out.

You may need to cut the whole mess off and find a different pulley. I'd start with a death wheel on a grinder and slot the pulley, then split it with a chisel.

 

[Jim.ME]

I have to remove the output pulley off the same gearbox so I can remove the gearbox to fix a seal leak. This pulley looks different than the taper lock setup on the input shaft. This one is also very rusty. There are 3 sketchy looking bolts, but no extra threaded holes to push the hub from the pulley )(first picture). These bolts also look like they go through the pulley and possibly into the housing (second picture). The key also looks like it's welded to the hub.

How should I approach removing this pulley?

thanks again in advance for your help
Steve

It looks like not only is the key welded on this one, but it appears the bushing has been welded into the sheave. You might want to measure it up and document the measurements before you start on it, so you have info to hunt for a new one with. Cut your losses and cut it off, then clean the shaft up before installing a new one.

 

[tom upton]

It makes 0 sense that bolts would go into housing. Does the shaft turn? By what I can see it also looks like some type of taper lock although it is strange there are no removal holes. Maybe they are there but just rusted in? On some bushings there is only 2 removal holes. Maybe someone in the past tryed to remove, and busted them off flush and rust has them hidden on the back side of your pic? Does not really matter anyhow as that thing looks like it came out of a fertilizer plant! Looks like you are going to have to destroy the sheave to remove. By what I see in your pics it is going to require a BFH!! Hope you can get it off without damaging shaft. Good luck.

 

[steve-in-ga]

It makes 0 sense that bolts would go into housing. Does the shaft turn? By what I can see it also looks like some type of taper lock although it is strange there are no removal holes. Maybe they are there but just rusted in? On some bushings there is only 2 removal holes. Maybe someone in the past tryed to remove, and busted them off flush and rust has them hidden on the back side of your pic? Does not really matter anyhow as that thing looks like it came out of a fertilizer plant! Looks like you are going to have to destroy the sheave to remove. By what I see in your pics it is going to require a BFH!! Hope you can get it off without damaging shaft. Good luck.

Yes, the shaft turns without issue. I see what you are saying, since it turns, the bolts can't be in the housing. The only issue is a leak in a seal.

 

[steve-in-ga]

I suspected I would probably have to cut it all off but wanted to ask for others opinion.

Maybe I should just leave it be and try to slow down the leak for now. Any ideas on how to slow the leak down? I have been contemplating doing one of the following:

1) It calls for 90wt gear oil. Maybe use a thicker oil.
2) Use some type of gear stop leak that swells the seal
3) Mix in some type of grease to thicken the oil

What are your thoughts on using one of these options to slow the leak.

thanks again for your help
steve

 

[Jim.ME]

I suspected I would probably have to cut it all off but wanted to ask for others opinion.

Maybe I should just leave it be and try to slow down the leak for now. Any ideas on how to slow the leak down? I have been contemplating doing one of the following:

1) It calls for 90wt gear oil. Maybe use a thicker oil.
2) Use some type of gear stop leak that swells the seal
3) Mix in some type of grease to thicken the oil

What are your thoughts on using one of these options to slow the leak.

thanks again for your help
steve

Corn head grease has been used in many similar gear boxes in place of gear oil to reduce leakage.

 

[Harry in Ky]

Adding grease to mix is by far the easiest option. It would depend on the bearing condition. If the shaft moves side to side, in and out with little effort, then you need bearings as well as seals. If the shafts feel sound add grease and run it.

 

[formerly ny bill]

Corn head grease has been used in many similar gear boxes in place of gear oil to reduce leakage.

corn head grease would be my suggestion, too.

 

[Mike(NEOhio)]

That inner "bushing" looks like it's been hammered some around the edges and the bolts are too close to the OD to be a taper-lock. Could there be a rubber vibration damper under the plate? My 1207 has one on the wobbler drive pulley. I'd suggest cleaning it all up with a wire wheel to see better and grind off the bolt heads. Go from there.

 

[Fritz Maurer]

Get the thing cleaned up before you succumb to all this talk of cutting it off.
Clean around the bolt heads real good and use a six point socket… if they twist off that’s ok. If you can’t get a bite on them, then that’s the only cutting you will need to do, when you grind the heads off.
Get a piece of pipe big enough to fit over the hub to contact the pulley, and drive the pulley off the hub. The hub will then be loose on the shaft.
If the bolts break off in the pulley, build a fire either in your wood burner or outside, bury the pulley in hot coals and allow it to get bright red ; let the fire go out and the pulley cool in the ashes. The next morning, with a little tapping, the bolts will come out with your fingers.

 

[steve-in-ga]

Get the thing cleaned up before you succumb to all this talk of cutting it off.
Clean around the bolt heads real good and use a six point socket… if they twist off that’s ok. If you can’t get a bite on them, then that’s the only cutting you will need to do, when you grind the heads off.
Get a piece of pipe big enough to fit over the hub to contact the pulley, and drive the pulley off the hub. The hub will then be loose on the shaft.
If the bolts break off in the pulley, build a fire either in your wood burner or outside, bury the pulley in hot coals and allow it to get bright red ; let the fire go out and the pulley cool in the ashes. The next morning, with a little tapping, the bolts will come out with your fingers.

I decided to leave it alone for now as the bearing is good with no play. I'll just fill the gearbox with corn head grease until the bearing goes out or something else requires me remove the pulley.

I'll give your suggestion a try when the time comes.

Thanks for your reply
Steve