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October 28th, 2015, 12:47 PM   #1
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Screwed up big time, lower cam chain sprocket

hello! I basically put the lower cam chain sprocket the wrong way around and it slid all the way to the bottom with one or to gentle taps, preheated to 200C. There is maybe 2 mm room between the teets and aluminium. No chance for the puller to reach in. I did get some steel wire around the teeths and onto the puller and ripped the wire off. It's on there really tight.

Husaberg fe 400 2000 model

any good ideas? I'm close to throwing the berg into a local river
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October 28th, 2015, 08:38 PM   #2
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How about using a couple of high quality hose clamps. Hose clamps are very strong. If you have 2mm of room between the case and the sprocket I would think that a hose clamp could be slid through and either clamp the puller to the sprocket or tighten the hose clamp tight around the sprocket and then affix the puller claws where you screw the hose clamp together somehow.

You could possibly use hose clamps to clamp a slide hammer to the gear. Probably heating the gear with a torch just before hammering should help. Not too hot as you don't want to ruin any heat treatment of the gear. I would toss it in a bucket of water as soon as I got it off.
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October 28th, 2015, 08:47 PM   #3
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Originally Posted by husabutt View Post
Not too hot as you don't want to ruin any heat treatment of the gear. I would toss it in a bucket of water as soon as I got it off.
I'm no metallurgist but if you didn't want to affect the heat treatment of the gear then quenching it in a bucket of water after heating with oxy acetylene or MAP gas would be THE LAST THING to do.

By all means use heat. Just don't dunk it afterward.
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October 30th, 2015, 12:43 AM   #4
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would there be any call for these gears if I had a half a dozen made? I had some beautiful gears made three years ago and before that alloy lower cam chain sprockets by the same man in HE30 alloy.

I'm guessing at about 80gbp (plus 16gbp VAT in the EU)

just an idea?

Taffy
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November 1st, 2015, 04:49 AM   #5
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To anybody in the same situation in the future. solved

http://imgur.com/a/eJvwu
Thanks from logjump, husabutt, spanner and 4 others

Last edited by zzxcrozzy; November 1st, 2015 at 04:53 AM.
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November 1st, 2015, 06:36 AM   #6
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Wow! Looks like a great deal of effort to prevent further damage. We'll done!
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November 1st, 2015, 01:01 PM   #7
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That's what you call thinking out of the box. Good job
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December 15th, 2015, 04:33 AM   #8
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brilliant work
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big, cam, chain, lower, screwed, sprocket, time



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