Morning all, I'm a bit stuck with this. Please see photos. The bike is a 1965 B40F. The flanged steel collar sitting inside the hole is, I think, what remains of the old oil seal, the rest of which broke up when being removed. The collar is sitting on top of the bush which the kickstart shaft passes through. My problem is how to get that collar out. How to get a purchase on it. Obviously I need to be careful not to damage the soft alli casing, or the bush. I thought about maybe glueing something in it and then trying to knock it out from the other side, but maybe the glue would give way, or it wouldn't budge and then I'd be stuck with it and maybe worse off. Any ideas please?
can you screw a large tap into it and maybe pull it out with that.
Thanks idie. Maybe, but not confident enough to buy a tap specially.
Of course if I had a milling machine, or even a lathe with a large faceplate...
Any other ideas, anyone?
Phil
Morning Phil have you had a magnet on it to see that it is not alli, on the reverse side can you feel a lip where the old seal butts up to the bush if so could it be tapped out or you could drill a tiny hole in it but not to go in the alli and prize it out just a thought hope it might help, Roy
Hello Roy, Thanks. It's magnetic. There's no lip on the other side. Re the tiny hole idea, you'd have to come in with the drill at an angle - I can't see it working really.
Ok what about drilling tiny holes across it to relieve its tension but not going into the alli, Roy
Hi,
Try a very thin screwdriver from the inside. Bend the end over a bit so that it can engage with the edge of the remains of the seal and tap it.
Dave.
I've had success removing bearing races from aluminium castings like this by heating them up and using a dead blow hammer to shock it out. If the new seal is inserted the other way around you shouldn't have this problem again.
Calum, when you say the other way round, you mean the correct way, ie coil to the inside (coil to oil)?
Heating in an oven could be worth trying. The aluminum casing will expand more than the steel backing of the oil seal. Or, a Dremel with a thin cutter to cut through the circumference of the backing.
Regarding oil tightness with the new seal it probably doesnt matter which way it is positioned, no discernable pressure to seal.
Quote from: Phil C on 30 Mar, 2021, 13:17
Calum, when you say the other way round, you mean the correct way, ie coil to the inside (coil to oil)?
Indeed. Good habit, even though as said above by lightning&starfire in this application it doesn't matter too much
Hi,
Although there is no pressure, with the seal in the correct way it will stop any seepage that there may be and it will stay cleaner rather than road grime accumulate in it.
Dave.
Done it. Used a thin chisel tapped gently between the collar and the seating surface, to lift the lip slightly, enough to get a screwdriver in and lever it up and out, with the aid of heat from my hot air gun. Many thanks for all the suggestions everyone, much appreciated. Phil