paul8899 Posted July 10, 2010 Report Share Posted July 10, 2010 Hello, I have been trying for a few days to remove the flywheel off my ypvs and I made a puller at work today . So I screwed it into the centre thread ( m27 left hand ) and then did the centre screw up to remove it, suprise suprise it wouldn't come off so I gave a little tap, still won't come off. So I gave it a little bit more of a whack, still no joy but a bent screw Replaced the screw, did it up nice and tight and the head popped off !! Bugger Gave it another whack , still stuck fast ! So now I have a ypvs engine with the generator still on and the removal tool stuck in said generator, I'm hoping that it will come off on its own ( its stuck under pressure ) I'm just off to get the mrs hairdryer to warm it up but failing that any ideas as to how to get it off ? Link to comment Share on other sites More sharing options...
porter_jamie Posted July 10, 2010 Report Share Posted July 10, 2010 Hello, I have been trying for a few days to remove the flywheel off my ypvs and I made a puller at work today . So I screwed it into the centre thread ( m27 left hand ) and then did the centre screw up to remove it, suprise suprise it wouldn't come off so I gave a little tap, still won't come off. So I gave it a little bit more of a whack, still no joy but a bent screw Replaced the screw, did it up nice and tight and the head popped off !! Bugger Gave it another whack , still stuck fast ! So now I have a ypvs engine with the generator still on and the removal tool stuck in said generator, I'm hoping that it will come off on its own ( its stuck under pressure ) I'm just off to get the mrs hairdryer to warm it up but failing that any ideas as to how to get it off ? i've got a proper puller in me garage, which you can borrow if you come and get it.. (pretty sure it's a ypvs one) Link to comment Share on other sites More sharing options...
porter_jamie Posted July 10, 2010 Report Share Posted July 10, 2010 Uploaded with ImageShack.us sorry for crap pic quality, it's off me phone - looks fairly 27mm to me, and it is lh thread. i'm in essex Link to comment Share on other sites More sharing options...
paul8899 Posted July 10, 2010 Author Report Share Posted July 10, 2010 Uploaded with ImageShack.us sorry for crap pic quality, it's off me phone - looks fairly 27mm to me, and it is lh thread. i'm in essex thats what I've got stuck in mine Thanks anyway Link to comment Share on other sites More sharing options...
paul8899 Posted July 10, 2010 Author Report Share Posted July 10, 2010 this is what I have at the moment , oh and copious amounts swearing at it doesn't work either , might try a bigger hammer ! Link to comment Share on other sites More sharing options...
porter_jamie Posted July 10, 2010 Report Share Posted July 10, 2010 how big is the pin thread? m8? can you make it m10? Link to comment Share on other sites More sharing options...
VeeTeeArr Posted July 10, 2010 Report Share Posted July 10, 2010 Is the puller still under pressure? If so leave it a couple of hours and then give it another hit with the hammer. Link to comment Share on other sites More sharing options...
zx6rrob Posted July 10, 2010 Report Share Posted July 10, 2010 Paging Docjohn, paging Docjohn. Docjohn to the workshop, I repeat, Docjohn to the workshop. Link to comment Share on other sites More sharing options...
paul8899 Posted July 10, 2010 Author Report Share Posted July 10, 2010 Is the puller still under pressure? If so leave it a couple of hours and then give it another hit with the hammer. I managed to get the broken bolt out and replaced it with another, I am going to leave it as you suggested an hopefully it will come off. Just a bit gutted as I wanted to strip the engine down and get it blasted next week If it doesn't come off over the weekend Ill take it to work and get a more manly bolt instead of the girly one thats in there at the moment Thanks for your help Link to comment Share on other sites More sharing options...
Devon Posted July 12, 2010 Report Share Posted July 12, 2010 is there enough space around the flywheel to fit a gear puller? if you can find a big enough one then that might be an option. it wasnt an option for me when i had the same problem as you because there wasnt enough space Link to comment Share on other sites More sharing options...
drunkn munky Posted July 12, 2010 Report Share Posted July 12, 2010 Been having the same problems with a mito flywheel, ive gone through 2 flywheel pullers that are both fooked now, soaked the complete bottom end WD40, tried a gas torch and its still stuck on. Its been sitting for months now under presure in the hope it might pop off but no luck. Let me know if you get it off, i could do with some fresh ideas. Link to comment Share on other sites More sharing options...
Devon Posted July 12, 2010 Report Share Posted July 12, 2010 could you not use some kind of press? Link to comment Share on other sites More sharing options...
wazrs257 Posted July 12, 2010 Report Share Posted July 12, 2010 If the 3 bolts holding the stator to the crank cases are short enough, you may be able to remove them, split the cases and remove the crank with the generator in situ. You could then get a BIG press involved. Careful though, it is possible to snap the end off the crank. If/when you do get it off, lap the flywheel to the crank taper, a better fit on the taper means you dont have to do it up till your ears bleed to stop it coming loose. Link to comment Share on other sites More sharing options...
paul8899 Posted July 12, 2010 Author Report Share Posted July 12, 2010 I managed to finally get it off Like most things in life all it needed was a good screw ( I made a 12mm screw up at work with a ball bearing in the end ) used a length of bar on the end of the allen key and off it popped . I had a quick look at the taper and it looks like it had rusted itself together so I think that was what was holding it on so tight. Link to comment Share on other sites More sharing options...
paul8899 Posted July 12, 2010 Author Report Share Posted July 12, 2010 If it were me I'd first of all make sure that the puller wasn't working on the end of the crank, but rather on the flywheel bolt that has been wound off about 2 turns. I'd fit the puller and then stick the whole engine in a freezer for 24hrs, I'd take it out of the freezer, wind in bit of tension into the puller and start heating the outside edge of the flywheel all the way round with a hot air gun to create a temperature differential between the crank and the flywheel, I'd also be shocking the flywheel with a nylon mallet all way around the edge (hitting at diametrically opposite points on the circumference) to try and shock it free....all the while keeping a constant pressure on the puller's jacking screw. I don't know if the ball bearing in the end of the jacking screw made any difference or it was the bashing I gave it over the weekend ( the flywheel ) but it came off with a lot less force than I used before. Link to comment Share on other sites More sharing options...
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