Bosch crank arm removal - damaged thread

[falmouthtony]

Anyone got any bright ideas for removal of bosch performance crank arm with damaged thread when normal puller is no use.

Thanks

 

[EddiePJ]

You could try wrapping some ptfe tape around the thread of the puller.

 

[soundwave]

https://www.zoro.co.uk/shop/automotive/pullers---mechanical/3"-2-jaw-double-ended-mechanical-puller/p/ZT1120296X?utm_campaign=pla-Automotive+-+&utm_source=google&utm_medium=shopping-pla&utm_keyword=ZT1120296X&istCompanyId=6aa6787b-063e-4414-802d-129f235df603&istItemId=wtqixxmair&istBid=tztx&gclid=CjwKCAiAxJPVBRB4EiwAsCA4aVEZE2XF-LHDimVNx_djCyBWjPvICKcmom48hWTltl4JsVato88u2BoCdHkQAvD_BwE

 

[Artstu]

and if you're not putting it back on perhaps it'll just knock off with a hammer.

 

[mike killay]

One of the cranks on my TONARO was on so tight that I had to heat it up with a blow lamp before it would budge.

 

[EddiePJ]

Thinking about this further, and this is without actually checking to see if it would work.

Assuming the puller is comprises of two parts, an outer which threads/screws into the stripped crank arm, and an inner that that tightens and pulls the crank arm off, I am wondering whether you could screw the outer into the crank arm as best that you could, then put a larger jubilee clip round the crank arm, and bridge the outer, so that it cannot be removed.
You might then be able to tighten the inner, and pull the crank arm off.

As said though, I haven't checked to see if this is possible to do, but it could be another option to investigate.

 

[Deleted member 4366]

Bosch use an ISIS crank, so it should come off fairly easily once you unscrew the retaining bolt.