martin 305 Posted April 6, 2008 Report Share Posted April 6, 2008 Hi there does anyone know what size puller for a 1974 ossa mar flywheel Got to change the crank seals and the flywheel won't tap off. Also how do you get the clutch basket off as the kick start spring doesn't look like it's been tensioned or it,s broken .many thanks for any help with these problems cheers martin Quote Link to comment Share on other sites More sharing options...
woody Posted April 6, 2008 Report Share Posted April 6, 2008 Can't tell you the actual size of the flywheel puller but you'll get one from Steve Goode/Sammy Miller etc without any problem. You need a clutch holding tool of some description to lock the clutch in order to undo the basket retaining nut. An old clutch plate that drives on the hub with a bar welded to it to locate through the fingers on the basket works. The cush drive on the crank is held on with an allen bolt which is an odd size but can't remember off the top of my head. Once that is removed you can remove the cush drive assembly and then the drive sprocket/chain/basket as one assembly. You are then left with the tapered sleeve on the crankshaft that the cush drive and sprocket sit on. This can only be removed with a puller as normally it is an extremely tight fit on the taper. Don't try to lever it off as you will fracture it as it is brittle or damage your casing - you won't budge it from the taper anyway unless you are extremely lucky. There is a special tool to remove this or you can make something. The groove towards the end of the sleeve is there to locate two semi-circular collars. A thick plate with a hole the same diameter as the sleeve can be pushed onto the sleeve, the collars are then fitted into the groove and the plate pulled forward until it butts up against the collars which prevent the plate from sliding off the sleeve. A conventional 2, 3 or 4 legged puller can then be used to pull against the plate to pull the sleeve off. As mentioned before, this sleeve can be very tight so if it doesn't budge you may have to put some tension on it, apply heat and tap it or tap the end of the puller to shock it free. Be careful as I have had them ping off and travel a few feet through the air when they let go, so stand to one side of it. Or it may just come off with a couple of turns on the puller if you're lucky. Once off, you can get to the kickstart spring. Clutch has to be removed to do the crank seal anyway. 1 Quote Link to comment Share on other sites More sharing options...
martin 305 Posted April 6, 2008 Author Report Share Posted April 6, 2008 Thanks for that advice Woody. I will ring sammy millers in the morning Martin Quote Link to comment Share on other sites More sharing options...
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