Pulley stuck on shaft

[caedont]

there is a engine I have from a snowblower and there is a pulley attached to the crankshaft. it is held on by a single bolt and the crankshaft is keyed. How do I get it off? when i try to the engine just spins so I’m not sure what to do

 

[Edwin Spangler]

Crankshaft needs to be held in place. Then remove the bolt. Then pull the pulley and key out. An impact is my favorite.

-Or is there more to it that a picture could explain better?

 

[caedont]

How do i hold the crankshaft in place?

 

[caedont]

Sorry i just don’t know a good method. Im pretty new to go kart and engine projects

 

[Edwin Spangler]

If you have no way to mechanically clamp it, use a DIY tourniquet (wrapped around the pulley) with something long enough to use as a lever.

Or, using some grippy gloves, hold the pulley and have someone whack the bolt loose with a hammer.

Gotta picture?

 

[Sparkwizard]

Use a ratchet and a short socket. slowly turn the bolt counter clockwise until you feel some resistance, the HIT the ratchet with a piece of wood, rubber mallet, your hand...repeat the procedure until it breaks loose.

Got picture?
What color is the engine? Does it have any decals or numbers on it?

 

[caedont]

Use a ratchet and a short socket. slowly turn the bolt counter clockwise until you feel some resistance, the HIT the ratchet with a piece of wood, rubber mallet, your hand...repeat the procedure until it breaks loose.

Got picture?
What color is the engine? Does it have any decals or numbers on it?

I don’t have a pic right now, but your suggestions seem like they should work. Thanks for the help

 

[Sparkwizard]

Are you using a phone to log into this site?

 

[caedont]

No im not. But i can upload a picture later

 

[Denny]

How old are you there son? This way we can gage how to answer your questions and not just assume your old enough to know what we’re talking about.

 

[caedont]

older than 15. so far i understand all the tools and things you guys have mentioned

 

[Hellion]

Whats the progress and where’s those photos? I can’t see anything
I suspect the pulley is rusted on the shaft if it has not budged with the aforementioned techniques. Did ya get yer nut off?

There’s an arsenal of weapons you can use to accomplish the task like a hammer, penetrating fluid, blowtorch heat (fire) and mild cursing but I suspect a gear/hub/pulley puller might be the ticket.

 

[Sparkwizard]

It sounds like a small Tecumseh with a stepped shaft and no keyway. That would be a problem.
Now, let me suggest you put your pulley on a jackshaft and put a centrifugal clutch on that jackshaft, then run a chain to a wheel with a sprocket on it.

 

[Karttekk]

I would suggest a piston stop to hold the crankshaft in place while loosening the crankshaft bolt.

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[Karttekk]

Remove the spark plug then thread this into the spark plug hole. Doesn't have to be super tight.

 

[Sparkwizard]

I have never tried this, but I have heard about people stuffing rope into the spark plug hole to prevent the crank from turning.

 

[Whitetrashrocker]

The rope trick works for a few things. Loosening the crank nut or to hold the valves while springs are removed with head still attached.
A piston stop is used in conjunction with a degree wheel. Its also much easier to use than pushing rope.

 

[Hellion]

Of course if you're just a neophyte and have only a few basic hand tools, you will struggle removing the bolt (and the pulley) without immobilizing the crankshaft. Otherwise, I'd recommend an ugga-dugga or impact wrench. The impact wrench will hammer the nut off faster than the crankshaft can react and start to turn with it.




Back in the day these were mostly pneumatic/air powered and everyone knows the sound they make but many are cordless/electric nowadays and every fix-it guy on Youtube uses one.

 

[Grizzlymi]

I picked up a 20v 3/4" Dewalt impact gun a few years ago for $59. My buddies work was running a wholesale deal for employees that offered close to cost for anything on there site. Ordered a bunch of batteries as well since I have so many Dewalt 20v tools. That impact is the compact one and hasn't met a lug nut yet I won't remove. Great investment for anyone that's lazy like me!

 

[caedont]

well i got the bolt out of there but its pretty hard to get the pulley off now