Well, the engine is out, (I have decided to do a rebuild) and i have most of the parts I need. The clutch is off, and apart from the gear on the crank (driving the clutch) is stuck like the proverbial and stopping me splitting the cases! Cannot see a way to get a puller on it there is so little room and I am worried about damaging the cases if I try levering it off. Is there a trick to shift it?

C4

Normally their not hard to get off, pretty sure they just slide off. Someone has possibly used loctite on it or the nut which has found it's way down there, try a little bit of heat- loctite breaks down around 100degC

Only ever split one sherco, i could only get that gear off by putting the nut back on a couple of threads and knocking the crank through the gear. Gas Gas one just slides off so dont know why Sherco one is such a tight fit.

They are not generally too tight on the shaft, but just enough to where a puller with a thin edge works best as you may mangle things trying to pry it off. One young lad used an old pushbike pedal to make a puller.

Thanks for the input. I will try heat and see how that goes! The nut was extremely tight, in the end I had to use a high power impact gun to shift the nut. There was no evidence of loctite though. The pedal puller sound very inventive! Sadly I am not!! Fingers crossed!

C4

Lol! ????

Heat sorted it

Heat sorted it

Yes but did it "sort" (bugger) the crankcase seal at the same time?.... how long were you heating it for?

I'm not keen on that method and I've never had to use it on that Pinion Gear either.

Best of balance.

Neo

If he is doing a rebuild then i presume he's going to change main bearings and seals so doesnt matter if he cooks the seal when splitting it does it ?

Edited November 27, 201213 yr by baldilocks

Hi, I used a hot air gun, gentle heat, did not boil water droplet so below 100 deg c. New Vuitton seals and new bearings cheers