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6 Feb 2012
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Join Date: Jun 2008
Location: Seville (E)
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Front Brake Master Cylinder Screws: metal or CHEESE?????????
My Goodness, I applied very little strengh! (wtf!) Maybe due to cold temperatures..?
I plan to buy an impact driver tomorrow, but will it damage the mecanism? (emptying fluid, removing it from its place and putting it over a wooden block, for a softer impact). What about heating with a BIC lighter (know them better than with oxy-acetilene torches people recommend for studs)
Any other options in such delicate place? Drilling seems pretty tricky.
Does the cover has an inside "lid" or can I rotate it if I remove 1 of the screws?
Already postponed MOT twice... what's going wrong with these damn f**king brakes???
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6 Feb 2012
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Join Date: Feb 2010
Location: york
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Try the impact driver, press down really hard and give it a firm tap, you could try a sharp punch and drive the screws round with that, or drill, I think the screws are M4, drill a shallow pilot hole 2-3mm (take care not to break the bit!) then use a 4mm bit,(don't break it!) this should take the head of the screw off, lift the top off and use pliers or grips to take the screw out of the master cylinder.
Replace them with "allen" screws
Impact driver will be a good investment, as is a hot air gun
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6 Feb 2012
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Join Date: Jun 2006
Location: Northumberland UK
Posts: 36
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How about a slot with a dremel then screwdriver.
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6 Feb 2012
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Join Date: Mar 2011
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Your not the first and you will not be the last to do this to those screw in paticular. I understand that the eastern fiends have a slightly different slot to the drivers you/we have and so the driver head is wrong shape.
Have a look here http://www.motorcycle.in.th/article....ps-Screwdriver or
JIS Screwdrivers - webBikeWorld
Best ensure slot is clean and then apply direct and firm presure whilst turning driver.
But for now as mentioned above Try the sharp punch or a bradle on the flat outside of the head first. If you drill dont go to far just enough to remove the head of the screw.
Good luck
Last edited by Socks; 6 Feb 2012 at 22:48.
Reason: coz I can!
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6 Feb 2012
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Contributing Member
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Join Date: Jun 2008
Location: Seville (E)
Posts: 561
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Quote:
Originally Posted by oothef
Try the impact driver, press down really hard and give it a firm tap, you could try a sharp punch and drive the screws round with that, or drill, I think the screws are M4, drill a shallow pilot hole 2-3mm (take care not to break the bit!) then use a 4mm bit,(don't break it!) this should take the head of the screw off, lift the top off and use pliers or grips to take the screw out of the master cylinder.
Replace them with "allen" screws
Impact driver will be a good investment, as is a hot air gun
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Thx (again), I'll try the impact screwdriver. Plastic head hammer rather than fully iron? I should get many tools, but I do not plan to stay here forever, so not good to move out/leave behind (and I have borrowed the garage, so not really my place to work)
Quote:
Originally Posted by grumpy
How about a slot with a dremel then screwdriver.
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Same for the dremel, but I'd love it!
Quote:
Originally Posted by Socks
Your not the first and you will not be the last to do this to those screw in paticular. I understand that the eastern fiends have a slightly different slot to the drivers you/we have and so the driver head is wrong shape.
Have a look here http://www.motorcycle.in.th/article....ps-Screwdriver or
JIS Screwdrivers - webBikeWorld
Best ensure slot is clean and then apply direct and firm presure whilst turning driver.
But for now as mentioned above Try the sharp punch or a bradle on the flat outside of the head first. If you drill dont go to far just enough to remove the head of the screw.
Good luck
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At least I did this right: I tried several (exchangeable) screwdrivers till I got the perfect fit. I guess it was too cold and I applied not so perfect strength... But I'll write with interest the whole article.
Thanks again to all. Maybe one day I'll give those advices to a novice hubber-mechanic-wanabee as myself!
Last edited by estebangc; 6 Feb 2012 at 23:05.
Reason: cos I'm worth it! :-)
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