i cleaned the front brake calliper & the disc & pads, while i was tightening the pad retaining pin to 13ft/lb the allen key has rounded off the hexagon head on the pin,i didn't even manage to get it torqued up !!!!! how the hell do i get this out to replace it ?
It may be that the Allen Key bit is slightly undersized Or torque wrench incorrect. Do you have access to easy out (left hand threaded) tool, if so easy peasy. If not pls provide photo of the head of the offending item before attempting a cunning plan
if the tapped in torx dont work you can drill it out as its only the threaded bit holding it in, carefully to not damage the thread inside caliper. youll want a drill bit slightly bigger than the allen key drill it down to the main shank then the head should come up the drill and the shank will be free of the caliper. check your allen key's corners arent rounded, in fact chuck that one and get a new one, and also get your torque wrench checked.
If you get that wrong, a calliper is expensive, so I would exhaust all other options first. But defo order a new or couple of pins in case you wish to play again in the future
An impact driver with a good quality hex bit should do it. I ignored the torque settings when I did mine as I just knew 'feeling' through the torque wrench it was going to over-tighten when set at 18Nm. I reckon10Nm at the most, there is a secondary slotted cover screw making it virtually impossible for the pad retaining screw to come loose. As Crispey says, if you do have to drill the threaded head off go careful or it will be an expensive repair.
Do not use a drill It's to easy to get it wrong and damage the calliper Remove the calliper bolts and swing it away from the disc and fork... then get some mole grips and you can turn the pin out by gripping between the pads Done it this way loads of times on rusty/neglected callipers...it works When replacing the pin I personally wouldn't worry about torquing it up I just nip them up with plenty copper slip on the threads and refit the slotted cap...again with copper slip on the threads
This type of extractor works well on an Allen screw https://www.amazon.co.uk/Extractor-...coding=UTF8&psc=1&refRID=T54321PWZ2C4JS851C2S
AAAW! wheres your sense of adventure, there's plenty of hex head there and as long as your'e careful, used as a last resort of course
I agree with Dilligaf but when I discovered that the hexagon head was already rounded off on the pin on my old T100 I managed to drill it out carefully with no drama.
.......you might even find an old drill bit in a drill driver on hammer reverse (anti clockwise) might free it off.
well i tried the molegrip's on the retaining pin,IT DIDN'T BUDGE,a little hesitant about using a drill on it,i've applied a little WD40 on the threads both end's,will have another go tomorrow !!!!! wish i never touched it.
You might also try heating the caliper ( carefully ) with a heat gun. If its that tight you are going to need to be very carefull not to mess up the caliper try the mix DD has suggested and then try tapping in a tight fitting torx bit and try removal that way, the tapping in of the torx bit also helps free everything for removal !
i have ordered a replacement stainless steel retaining pin from squaredeal's £7 plus £4.99 postage,after looking online there seem's to be a known problem with the OEM pin, maybe they're made out of cheese.
Is there any way you can file two flat edges to to existing pin? This would give molegrips a better purchase
Hi Tappers, when you eventually get the old pin out, coat the threads of the new one in copper-ease grease then screw in place. This will stop the corrosion that's causing your current problem. Incidentally when I had a problem getting a brake pin out, as someone above said find a good tight fit torx bit and tap it into place then continue tapping (not hard just continuous) about 30 times. This will help to break the corrosion holding the pin in place - now just wind it out !!!!
if its not up to torque it cant be tight, Do you have imperial hex they should be slighty larger than metric and would stick in or use trox bit. good luck.
what a game that was, tried the imperial allen key approach, that didn't work, then tried a torx bit, all that done was chewed it up even more,got the molegrips out again, still wouldn't budge,about 5 coffee's & ten fag's later the dreaded drill came out,starting small then going up in size's, then used an EASY OUT,manged to get the retaining pin out with out damaging the thread's.ordered a stainless retaining pink will apply copper grease to the threads on fittings i will not over tighten the new one.lesson learn't.
