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Pulleys and size and torque

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tomatolord

05-16-2001 17:55:45




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I have a kemp chipper and I had to take the engine off to replace a blown headgasket, I thought the damage was worse than what it was...

The chipper has an 8 inch pulley that drives the chipper drum

I have 2 engines

The 5hp has a 2.5 inch pulley
the 4hp has a 4.5 inch pulley

Which one should I put back on.
I would rather not fool around with the flywheel.

Note the 4hp does not have enough torque and can bog down quickly.

The thing to really do is replace the engine with a 10hp or so but I already own the 5 so.

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Steve

05-30-2004 05:34:09




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 Re: Pulleys and size and torque in reply to tomatolord, 05-16-2001 17:55:45  
I am changing the drive belts on mu Troy-Bilt 17 hp tractor and the drive pulley is frozen/rusted on the shaft. I have tried WD40 and tapping and twisting and pulling and.....

I'm afraid to get to "physical" with it....anyone have any suggestions?



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Tom

05-17-2001 17:21:25




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 Re: Pulleys and size and torque in reply to tomatolord, 05-16-2001 17:55:45  
It is a little off the wall, but how about running both engines? couple of centrifigle clutches and away you go, 9 hp. Put a double sheave pully on the chipper and an engine on each side belted to the double pully. A centrifigle clutch on each engine crankshaft will let you start each one seperatly. I hooked one up for my father on the back of his Farmall Cub, and that engine (10hp) is OK, not too much power but enough.

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Erich

05-17-2001 07:13:59




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 Re: Pulleys and size and torque in reply to tomatolord, 05-16-2001 17:55:45  
It would seem to make a difference what condition the two engines are in. It could well be that the 4hp engine is realy putting out more than the 5hp if it is in better shape. Either way, chippers are very power dependent. Both engines are on the small side to do any significant chipping. I agree that a 10hp would be superior. You can possibly pick up a used 10hp engine for a reasonable price and be much more satisfied with the results. The main thing is knowing what the chipper itself is rated for, both in hp and RPM, and then putting on the maximum rated engine. Replacement pulleys can be purchased for a reasonable price, in almost any size for whatever engine you use.

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paul

05-17-2001 06:02:02




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 Re: Pulleys and size and torque in reply to tomatolord, 05-16-2001 17:55:45  
Use the right pulley. No big deal swapping those unless you forgot to tell us something? You don't want to, what, triple, quadruple the speed of your chipper???? But then, you didn't say what the original pulley size for the shot engine was?

Also, what are the rated rpm's of all your engines, that makes a diff too.

--->Paul



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John in MA

05-16-2001 19:13:30




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 Re: Pulleys and size and torque in reply to tomatolord, 05-16-2001 17:55:45  
Unless there's something I'm missing, what's the big deal with changing pullys? Just take the pully off the old engine and put it on the 5HP.



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tomatolord

05-17-2001 06:52:21




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 Re: Re: Pulleys and size and torque in reply to John in MA, 05-16-2001 19:13:30  
The issue is that both engines are pretty old
I do not own a wheel puller (but I should buy one anyway)

It would be much faster to just swap the two engines and not deal with the pulley issue.

And
From experience the easier the job APPEARS to be the longer and more frustrating it will take



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John in MA

05-17-2001 09:57:43




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 Re: Re: Re: Pulleys and size and torque in reply to tomatolord, 05-17-2001 06:52:21  
So the shafts are so rusty that you need a puller to take the pullys off? In that situation, I usually wire brush the rust off, hit it with Liquid Wrench, and use my trusty AutoZone $10 gear puller. I think that place is great for getting cheap tools you don't use often. They even let you take them back after the job is over.



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