Struggling with that front end (I need your help) - BMW R100S rebuild part 3
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- čas přidán 26. 08. 2024
- After servicing the front forks we want to replace those 50k km old steering bearings. The bearings on the triple clamps are no problem. Not as easy is to get the outer races out of the frames front end. BMW thought that these bearings will last forever and didnt make anything that helps to get them out. So we try different methods, but can we make it? Please let me know if you have a solution for the end of the video, THANK YOU
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The special tool goes under the lip on the inner race allowing it to be extracted. I have a set myself and it works.
But the lip is so so small. I grinded an inner bearing puller sharp and that worked.
BMW special tool. Steering head bearing puller set or. Inner race puller
Thanks
You can heat the bearing and freeze the pipe it fits on ..but i wouldnt use
A blow torch ...use a heat gun
With the top race you weld a bridge onto each side of the race and use that to tap it out, while its hot.
Your welds aren't sticking
I used an arc welder and a thicker bridge.
I think also once i used a long cold chisel to push it out from underneath but i left a bit of a cut in the frame so next time i used the welding method
Thanks for your comment. Apparently I didn't have the right welding material so this didn't work out but we have to work with whatever we got
@@bikedogtor1663 i notice its some time ago ...did you eventually win?
You have the tools.
You could run a bead of weld around the inside of the race. 1/2 way might do it. It might shrink it a bit when it cools. Or build up 2 spots with welds opposite of each other. To give your self a lip to catch with a drift from the other side. 2 options. Just dont weld it togeather. But put some heat to it. (With the welder) Bearings are hard metal.
If i come across that i take a die grinder and notch the frame in 2 spots. so i can hit it in the back with a drift next time.
Thank you, I think with my welding skills it's impossible 😄
Use an internal bearing extractor. Like from amazon (cheap one) or kukko puller (expensive one)
Thank you for the comment. So far I hesitated to buy an extractor bc I'm not sure if it will work. But I will look for the cheap one.
Bikedogtor it definitely works. With the cheap one, try WD-40 and/or heating the frame to help. But if you go with the expensive one, you won’t need to do this. The area around the steering head is thin so it may be hard to get good leverage.
Erst mal "Hi", tolle und sehr interessante Videos :-)
Du könntest auch die Spannung vom Lagerring nehmen.
Einfach mit nem Handschleifer und Vollhartmetal-Frässtift/kleine Schleifscheibe eine Kerbe in axialer Richtung rein schleifen. Sobald die Spannung vom Außenring ist, kann er keinen Widerstand mehr leisten.
Bei dem Kukko Abzieher brauchst du auch ein paar zehntel Millimeter Kante damit du den Ring packen kannst. Wenn du gar keine hast rutscht der raus.
Ich hoffe es ist einigermaßen verständlich ;-)
Sorry english speaking guys. It was quite difficult to explain. Even in German.
Warum auch immer musste ich deinen Kommentar erst genehmigen. Egal, vielen Dank für die Tips. Den Ring aufzutrennen ist natürlich eine Option, allerdings möchte ich absolut nicht den Lagersitz beschädigen. Das wäre meine letzte Möglichkeit wenn sonst nichts hilft.
you could try bend the end of a flat head screwdriver to a L shape and then try hammer it in the bottom side and pop it up or try drill a small hole into the bearing case and see if you can get something in to leaver it out or tap it out
Problem with this technique is that there is nearly no surface to use. Bmw didn't think that these bearings will be replaced :-D the hole method may works but it will be a hard time to drill the hardened material. Thank you for your ideas
@@bikedogtor1663 thats cool hope you manage to get it sorted if you manage to get a hole drilled you might have a better chance with your first idear as the weld would get a better hold with a hole best of luck getting it sorted
Die Stromstärke ist zu gering. Dickeres Material anstatt einem Blech, entweder eine Mutter, Schraube oder Unterlagscheiben verwenden! Haben wir sehr oft so gemacht. Hat immer funktioniert 😉
Grüße
Mike
Danke schon mal. Die Schweiß Punkte sind einfach abgeplatzt aus dem Ring. Das harte Material scheint zu spröde und evtl brauche ich einen Draht aus anderem Material? Habt ihr dafür Schutzgas genommen oder wig?
Wir haben WIG geschweißt und Draht zugeführt. Das Schmelzbad war bei dir nur leicht in der Oberfläche der Lagerschale. Auf schwäbisch bäbbt 😉
Ich habe bei mir einfach eine Gewindestange rein geschweisst, das hat perfekt funktioniert. Es muss aber gut geschweisst sein. tolle Videos