BMW K bikes (Bricks)

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1Back to top Go down    Stuck clutch arm pivot pin on Sun Sep 22, 2013 12:37 pm

hitmanh


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Hi all,

I'm trying to remove the clutch arm pvot pin (number 11 in the image below)



The pin seems to be seized to the pivot arm (pin moves with the arm) and can't shift it despite repeated beatings with a hammer, so before I remove the gear box and get out the really big hammer, blow torch, and dremel anything else worth trying? I've left it to soak with some penetrating oil over night and will have another go tomorrow.

Cheers

Matt


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2Back to top Go down    Re: Stuck clutch arm pivot pin on Sun Sep 22, 2013 2:20 pm

MikeP

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Whenever I've encountered a similar thing I've left it alone, the danger is that you could write off a gearbox case by snapping the lugs.


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1992 K1
1993 K1100R (used to be an LT)
    

3Back to top Go down    Re: Stuck clutch arm pivot pin on Sun Sep 22, 2013 2:46 pm

hitmanh


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MikeP wrote:Whenever I've encountered a similar thing I've left it alone, the danger is that you could write off a gearbox case by snapping the lugs.
Thanks for the warning. I'll probably try and demel the ends off and try and drill out the pivot. Or just leave it alone... hmmm.


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4Back to top Go down    Re: Stuck clutch arm pivot pin on Sun Sep 22, 2013 7:46 pm

Avenger GT

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I had the same problem with a K75. I ended up cutting the shaft (pin) with a 4" angle grinder, sacrificing the clutch arm in the process. A used arm from Motorworks is not that expensive, and certainly better than breaking the lugs off the back of the gearbox.

    

5Back to top Go down    Re: Stuck clutch arm pivot pin on Sat Oct 12, 2013 5:09 pm

hitmanh


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Avenger GT wrote:I had the same problem with a K75. I ended up cutting the shaft (pin) with a 4" angle grinder, sacrificing the clutch arm in the process. A used arm from Motorworks is not that expensive, and certainly better than breaking the lugs off the back of the gearbox.
This is what I ended up doing. Pulled the gearbox, got the good old angle grinder out and had the old rusty thing off in the few minutes. Cleaned up and brand new pivot pin, arm, and gubbins installed and nicely greased, and gearbox ready to be refitted.

Cheers
Matt


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6Back to top Go down    Re: Stuck clutch arm pivot pin on Sun Oct 13, 2013 9:18 am

Fifth Horseman


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Another vote for the angle grinder method - you'll find the shaft has rusted itself solid to the bearings in the clutch lever. Get a modified clutch lever (or modify one yourself) with a grease nipple, keep it lubed and never have to worry about this happening again.

    

7Back to top Go down    clutch arm stuck on Sun Oct 13, 2013 5:39 pm

Gordon Smith

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Hi Hitman, try using freezing spray then heat then spray then heat etc all the time dose it with release fluid. Remember that if soap will melt on ally its getting close to losing shape. This has worked for me on previous vintage tractor rebuilds. Hope this can help:D

    

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