Mark W Posted August 11, 2003 Report Share Posted August 11, 2003 (EDIT: Pics are wrong! [No shit, Sherlock]) Right. "How to replace my McShite TPA", by Mark Westlake. (Pics courtesy of everyone's favourite Stud Muffin, Adam Read) To get your lever blade like that, you'll need to undo the bolt next to the number 2. This should means your lever comes off... You'll be needing to sort out the shagged TPA bit. Whip off the spangly red bit. 'fraid to say that's the last you'll be needing of that cheeky chappy, so say your final goodbyes and all that. Having done that, poke out "2" with a 5mm allen key. This should mean that 3 and 4 fall off. Having removed them, you'll be needing to sort out the shagged TPA bit. Whip off the spangly red bit. 'fraid to say that's the last you'll be needing of that cheeky chappy, so say your final goodbyes and all that. Select the following from the huge mess you've got yourself: 1 is about as useful as a Jeffrey Archer novel. That's the sheared bit of TPA bolt. It should come out without a fight, but if it chooses the "hard way", have a go at it with the ol' mole grips and whip it out. You'll need to replace it with an M5 bolt. This is the same size bolt as the one, for example, you use in 4-bolt Magura clamps or in your headset (which is the one I'm using, selected from my old T-Bird...). Having put that in instead of the TPA bolt, rebuild the lever and have a super fun happy time riding with a nice, nearly indestructible TPA. Prime. Mark. PS. If it all goes a bit FUBAR at some point, you should be able to work out how to carry on - I did mine a while back so it's not too clear in my mind... PPS. The ONLY THING that is different now is the fact you have an M5 bolt instead of the knackered TPA bolt. There should be NOTHING left outside the lever, unless you've ballsed up somewhere :- Quote Link to comment Share on other sites More sharing options...
quick_spider Posted August 12, 2003 Report Share Posted August 12, 2003 That's almost how I do it. I replace the broken bit(s) with an allen head M5 bolt... but I cunningly have bought a file the right width so I can file a groove into the head of the bolt. (The groove is the same width as the linkage plate that makes contact with the plunger pin) Once you done this it'll look something like the broken bit except.. it's not made of cheese and it's not broken. Stick it all back together and you can say hello to your old friend the red dial. Jon Quote Link to comment Share on other sites More sharing options...
JonMack Posted August 12, 2003 Report Share Posted August 12, 2003 I also put an M5 Nyloc Nut (one with a little o ring on to stop the nut un-doing) on the end of the bolt, this stops you from removing the bolt fully,and means when you bleed the brake the tpa always comes back to the same place so its bled consistently. hope this makes sense JoN Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 12, 2003 Author Report Share Posted August 12, 2003 lol Nice plastic MBUK grips there :D Anyway, have you found that the bolt becomes quite easy to turn? You can adjust mine super easily which is a bit odd...it's just nicely loose. So yeah, you can just use it without the TPA top bit on after you've sorted out the bodge :- Mark. Quote Link to comment Share on other sites More sharing options...
nb88 Posted August 25, 2003 Report Share Posted August 25, 2003 my whole TPA doesnt actually work anymore, when I adjust it it doesnt affect anything. so will replacing the red bit for an M5 bolt fix this? cheers Quote Link to comment Share on other sites More sharing options...
quick_spider Posted August 27, 2003 Report Share Posted August 27, 2003 Here's the pics of the sort of bolts you'll need: The one on the left is the one I've filed a groove in so I can have my TPA working as it was before. Hope that helps Jon Quote Link to comment Share on other sites More sharing options...
Janson Posted August 28, 2003 Report Share Posted August 28, 2003 My custom blade. I did as Mark said but drilled a hole through the plastic tpa red bit, so that if your fingers are slippy then its still easy to adjust, as opposed to having to try and hold the bronzt square bit... which I have to do... My TPA is gone. The little bronze thingy is still there though.. Can I bodge it without getting a new red twiddly bit? It's hard to adjust it as it's now :D Oh yeah, I'm back on the normal lever. The RB leaks Now. Bollox. :- Quote Link to comment Share on other sites More sharing options...
ben Posted January 31, 2004 Report Share Posted January 31, 2004 I tryed it and I found an m5 bolt ddint work with my tpa bcoz it ddint fit I did find a botl size that did and thats a 10x32 un hope this helps u and how come the pics dont work :unsure: ho hard bolt siz eto find though its not metric Quote Link to comment Share on other sites More sharing options...
matt_urban Posted January 31, 2004 Report Share Posted January 31, 2004 if tpa dont work it very likely the stupid lil bolt thing so a filed bold is better and stronger :unsure: Quote Link to comment Share on other sites More sharing options...
Joe Papasnap Maher Posted October 7, 2004 Report Share Posted October 7, 2004 hmm, fooked mine tonight, keeps going round and round, does anyone have the pics(not working) so i can undertsnad what to do better :"> Quote Link to comment Share on other sites More sharing options...
Jonno Posted October 7, 2004 Report Share Posted October 7, 2004 hmm, fooked mine tonight, keeps going round and round, does anyone have the pics(not working) so i can undertsnad what to do better :"> ← same over here Quote Link to comment Share on other sites More sharing options...
Mark W Posted October 7, 2004 Author Report Share Posted October 7, 2004 If someone adds me to MSN, I'll send 'em the pics and they can try and upload them somewhere. I've got no attachment/gallery space left :( Mark. Quote Link to comment Share on other sites More sharing options...
Joe Papasnap Maher Posted October 9, 2004 Report Share Posted October 9, 2004 mark...where are you (Y)" Quote Link to comment Share on other sites More sharing options...
Jonno Posted October 9, 2004 Report Share Posted October 9, 2004 joe, please could you post the pics up some were when you have then?? pretty please (Y) Quote Link to comment Share on other sites More sharing options...
JT! Posted November 20, 2004 Report Share Posted November 20, 2004 Cool, looks loads better now, works aswell!. Working pics would be realy useful though. Are the new design more reliable? Becasue this design is absolutely PANTS! Quote Link to comment Share on other sites More sharing options...
Fixed Pants™ Posted December 30, 2006 Report Share Posted December 30, 2006 (edited) Can you get the pics up again? Please. Edited December 30, 2006 by Fat Pants Quote Link to comment Share on other sites More sharing options...
t33zr Posted January 10, 2007 Report Share Posted January 10, 2007 Can you get the pics up again? Please.Yeah, please get it UP! Quote Link to comment Share on other sites More sharing options...
fyfey Posted January 27, 2007 Report Share Posted January 27, 2007 Pics would be good! If someone sends them to me over MSN or something I can host them Quote Link to comment Share on other sites More sharing options...
Mat Smith! Posted February 13, 2007 Report Share Posted February 13, 2007 I've bodged it without the pics but the bolt sort it goes past the bit what pushes the pads in, if you get what i mean?It pushes past it and then doesn't move the pads any further, and if i move my slaves furthur they catch .Mat Quote Link to comment Share on other sites More sharing options...
Revolver Posted December 8, 2007 Report Share Posted December 8, 2007 my fking TPA broke on the first day i had iti wound it all the way out and then when i used it it uttered a loud click and cross threaded. So now it doesn't turn. >(Thankfully enough it works well enough for me to not be arsed to fix it[=yeah, so to people wondering about the new design, DONT wind it all the way outDONT.why didn't they do something clever and make it completely out of metal? Quote Link to comment Share on other sites More sharing options...
Ash-Trials Posted December 8, 2007 Report Share Posted December 8, 2007 Uber Bump ^^^Mate take lever blade off and pull the thing coming out of lever blade out and then rescrew it in you most likey unscrewed TPA off it and then it turned so it wouldn screw back on either? Quote Link to comment Share on other sites More sharing options...
Revolver Posted December 8, 2007 Report Share Posted December 8, 2007 naaahi've took it out alreadyi'd need to molegrip both the bolt and the TPA wheel so that i could twist it back onto the right thread pathi cba atm though, its my front brake and it turns out there's so little room between the pads ad the rim that if i made it any harder i'd endo myself to deathlol Quote Link to comment Share on other sites More sharing options...
psycholist Posted December 27, 2007 Report Share Posted December 27, 2007 Anyone ever had the brass bit the red TPA knob presses on to shear off? I replaced the bolt with the forked end on it ages ago but now when I screw the TPA knob anticlockwise the knob and part of the bushing unscrew from the lever completely (So to make a TPA adjustment I have to dismantle the lever). I've also had to replace the pushrod between the plate that turns on the lever pivot and the piston in the lever as that got mashed too. The forked bolt snapping, the bushing shearing and the pushrod to the piston have failed in that order on both levers. It is impressive (From a consistent engineering point of view) that when part of one lever fails the same part in the other lever seems to break in exactly the same place within a couple of weeks. The set of brakes is 8 years old as far as I can remember - I've owned them from new, the front has been bled once and the back has yet to be bled, so overall I couldn't be much happier with their reliability, though some small changes to the parts within the lever would have the brakes running good as new with even less attention - It could cost them up to 50 grammes ... Quote Link to comment Share on other sites More sharing options...
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