Primary Clutch Removal

[Beeman]

So, I've tried to remove the primary clutch on an old engine and pretty much had everything off except for the pully side closest to the engine, of which I then tried a pully puller to remove this and eventually ended up bending the pully. So... no luck with the puller... and I've now warped that part of the clutch.

I've got another old engine kicking with a clutch on it and want to get it off the right way... so, I guess a couple questions:

How does the clutch lock onto the crankshaft so it doesn't spin? Key? Pressure fit?
The shaft that the moving pully half slides on - is this a solid part along with the other half of the pully? (the one thats fixed to the engine)
And most importantly.. does anyone have a break down of how to remove or install a clutch (the full assembly)?.. I think pictures would help me out the most.

Cheers,

Beeman

[Robio_8x8]

Hello Beeman

I have seen key way, D shaped shaft and spline types.
If all retaining rings, set screws E-clips etc are removed and it is still stuck on try tapping it out ( if you can get behind it ) with a soft mallet or hammer. Without actually seeing what you are looking at I can not really say but sometimes the hid set screws in wired places and get hidden by dirt even when the part looks clean. I have also seen a weird retaining cap on the bearing

I could not really find a good photo on the web



key way http://www.sledgear.com/images/heelx_clutch1.jpg

http://photos4.flickr.com/3945986_942a3efedf.jpg

http://www.atvconnection.com/Features/Product_Reviews/images/hammer_small.jpg

[Don]

If the engine's a two-stroke, chances are it's a taper shaft with no keyway, and a four stroke will be a straight shaft with a key.

I've made pullers for a number of clutches and it's usually not a big deal to do. Most of the inside threads are US and the materials easy to find for your puller. Once you find a bolt the right size and thread, you need to measure the distance from the threads to the bottom of the threads inside the crank where the reataining bolt for the clutch threads in. You need to weld a steel rod of the right length (and just big enough in diameter to slide past the crank threads)onto your puller bolt so that the rod pushes off the bottom of the crank drilling and forces the clutch from the shaft.

An alternative is to use a slide hammer, which is what I use. I find a bolt that will thread into the clutch and weld it onto a head for a slide hammer and pull the clutch that way. I've never damaged an engine using this method, but I don't guarantee it won't happen.

Hope this helped
Don

[Beeman]

So, looking back at the last two posts I'm thinking what I have here is this:

[Don]

On a two stroke? Yes.

Don

[Beeman]

Cool (and yep, it's a two stroke). I'll try it out tonight.

[Beelady]

So we got the clutch off, and yeah as per a post before its for a tappered crankshaft. The enigne I bought requires it to fit on a 1" keyed crankshaft. So anyone here know as to where I can find one of these? New or used, doesn't matter at this point, all we have been able to find so far are for the tappered ones.

Thanks.

[Don]

eBay Motors: New Comet 94C Duster 1" 4 Cycle Engine Clutch 206095A (item 180223737963 end time Mar-20-08 05:13:19 PDT)

If you watch ebay, you can find them cheaper, too.

Don

[Roger S]

OK, I have to ask. What is that on the cat's head

[Robio_8x8]

I do not think that helmet is DOT approved

OK, I have to ask. What is that on the cat's head

I am guessing it is a peal from a lime

[Beelady]

OK, I have to ask. What is that on the cat's head

I don't know, I thought it was cute....

[Beelady]

eBay Motors: New Comet 94C Duster 1" 4 Cycle Engine Clutch 206095A (item 180223737963 end time Mar-20-08 05:13:19 PDT)

If you watch ebay, you can find them cheaper, too.

Don

Thanks, this has helped.

[Robio_8x8]

Here is a good site for Clutch parts

I find this is a good site for parts but you just need to search the site a bit to get what you need

Search results -- clutch

You can find other atv parts there too

[Beelady]

Clutch found, thanks for the help.