Muel Posted September 4, 2009 Report Share Posted September 4, 2009 I've just got hold of, (I think), one of the first Echo levers, the one that leaked a lot due to the problem with the scored bore for the piston.Just wondered if anyone had succesfully sealed their's up? And if so, how? Would like very much to save and use it. Quote Link to comment Share on other sites More sharing options...
RossMcd Posted September 4, 2009 Report Share Posted September 4, 2009 Just a thought.. Unsure if this will work but drill the piston out a TINY size up to smoothen the bore then use a bigger o-ring to regain the seal.. May not work though.. You could just use a bigger o-ring anyway.. Quote Link to comment Share on other sites More sharing options...
Muel Posted September 4, 2009 Author Report Share Posted September 4, 2009 Cheers Ross, I think the best bet will be to try polishing it out as it is and using a bigger O ring. Drilling never gives a perfectly round hole, and it's never the perfect diameter. (When you're talking engineering/sealing surfaces).The ideal solution would be to get it bored out and get a new piston made slightly bigger for it, but I can't get it done. I've got a pretty good idea of what will work, just interested to hear how other people have solved the same problem. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted September 5, 2009 Report Share Posted September 5, 2009 Cheers Ross, I think the best bet will be to try polishing it out as it is and using a bigger O ring. Drilling never gives a perfectly round hole, and it's never the perfect diameter. (When you're talking engineering/sealing surfaces).The ideal solution would be to get it bored out and get a new piston made slightly bigger for it, but I can't get it done. I've got a pretty good idea of what will work, just interested to hear how other people have solved the same problem.I've just been given a mk1 dengura body too...im planning on honing the bore, polishing it and making a new aluminium piston for it Quote Link to comment Share on other sites More sharing options...
Muel Posted September 5, 2009 Author Report Share Posted September 5, 2009 I can't get the bore honed. Also theres no way of being certain if the bore is on the same plane as the rest of the lever, so you can't mount it up accurately. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted September 5, 2009 Report Share Posted September 5, 2009 I can't get the bore honed. Also theres no way of being certain if the bore is on the same plane as the rest of the lever, so you can't mount it up accurately.Ah touche, could be a bit of a problem then...errr, polish then slightly larger o-ring i guess then, hopefully you wont get a noticable amount of piston slop? Suppose it depends how much material you need to move from the bore in order to make it smooth and thus water-tight. Quote Link to comment Share on other sites More sharing options...
Luke_zoo Posted September 5, 2009 Report Share Posted September 5, 2009 Mine leaks from the piston Have never looked at it though, as I dont have a clue on what I'm doing Quote Link to comment Share on other sites More sharing options...
Mike W Posted September 5, 2009 Report Share Posted September 5, 2009 Cheers Ross, I think the best bet will be to try polishing it out as it is and using a bigger O ring. Drilling never gives a perfectly round hole, and it's never the perfect diameter. (When you're talking engineering/sealing surfaces).The ideal solution would be to get it bored out and get a new piston made slightly bigger for it, but I can't get it done. I've got a pretty good idea of what will work, just interested to hear how other people have solved the same problem.Use a reamer thats pretty close to perfect... Quote Link to comment Share on other sites More sharing options...
Muel Posted September 5, 2009 Author Report Share Posted September 5, 2009 Still can't clamp it up so it's true to the bore. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 5, 2009 Report Share Posted September 5, 2009 Use a reamer thats pretty close to perfect...Hand ream it you twonk.Matt Quote Link to comment Share on other sites More sharing options...
Muel Posted September 14, 2009 Author Report Share Posted September 14, 2009 Hand reamer won't work, not the adjustable ones anyway, seeing as the cutting blade edge things don't run all the way to the bottom of the tool and the bore is closed. Any other ideas? I can't get it machine reamed I don't think, and it can't be done by hand unless I buy a tool that's a fixed size, which are rather expensive... Quote Link to comment Share on other sites More sharing options...
Cookyboy Posted September 14, 2009 Report Share Posted September 14, 2009 Iv had 2 and never had any problem with either! Quote Link to comment Share on other sites More sharing options...
Muel Posted September 14, 2009 Author Report Share Posted September 14, 2009 Well I've heard of loads doing this, apparantly it's because they were bled with a mixture of oil and swarf by Mr Deng. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted September 15, 2009 Report Share Posted September 15, 2009 Mines been waterbled for ages and never leaked. Though it does feel like shit at the moment. Quote Link to comment Share on other sites More sharing options...
forteh Posted September 15, 2009 Report Share Posted September 15, 2009 Only just seen this....You can renew the bore of a pump by forcing a correct size ball bearing down there, this smoothes the surface and finishes it round; you should then be able to fit a new (possibly larger) seal and job should be a goodun.You need a ball bearing that is a fraction over the bore size (only talking a couple of thou or so), weld a rod to it and drive it down the bore and pull it out. All being well you should end up a nice smooth surface for your seals to run against Quote Link to comment Share on other sites More sharing options...
Muel Posted September 15, 2009 Author Report Share Posted September 15, 2009 In that case, I need a 13.75mm ball bearing.Sounds like it's worth a try though, will look into it, cheers Ed! Quote Link to comment Share on other sites More sharing options...
forteh Posted September 15, 2009 Report Share Posted September 15, 2009 (edited) In that case, I need a 13.75mm ball bearing.Sounds like it's worth a try though, will look into it, cheers Ed!Dont blame me if it all goes wrong edit: I would do some tests to make sure your weld is good enough, if you pull the rod off inside the bore then youre stuffed, I dont think you can poke it back out like you can on the 04 maggies can you? You might be able to get some compressed air on the back of it though, make a giant caliber BB gun Edited September 15, 2009 by forteh Quote Link to comment Share on other sites More sharing options...
Muel Posted September 15, 2009 Author Report Share Posted September 15, 2009 Think I might do it just for the sake of it, they've got proper air lines at where my Dad works that I think run at 100PSI. That'd probably go through things quite well. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted September 15, 2009 Report Share Posted September 15, 2009 lol i can see fatpants looking at this thread and designing his new potato/bb canon already...This sounds good, be good to see if it works! Quote Link to comment Share on other sites More sharing options...
Muel Posted September 15, 2009 Author Report Share Posted September 15, 2009 I appear to have made it a lot better, I got a piece of steel rod, cut a slot in it, slotted some wet and dry in there and wacked it in the pillar drill, then polished it out a bit. Will give it another go tommorrow and pop to the shop to try and get an oversized O-Ring for the piston.Looking good so far though. Quote Link to comment Share on other sites More sharing options...
Borat Posted September 15, 2009 Report Share Posted September 15, 2009 lol i can see fatpants looking at this thread and designing his new potato/bb canon already...This sounds good, be good to see if it works!Had to be sig'dSorry for not being any help Mr Muel. x Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted September 19, 2009 Report Share Posted September 19, 2009 I appear to have made it a lot better, I got a piece of steel rod, cut a slot in it, slotted some wet and dry in there and wacked it in the pillar drill, then polished it out a bit. Will give it another go tommorrow and pop to the shop to try and get an oversized O-Ring for the piston.Looking good so far though. Thats a good idea bump though? any results muel? Quote Link to comment Share on other sites More sharing options...
Muel Posted September 19, 2009 Author Report Share Posted September 19, 2009 I bled it by fitting a hose and sucking the water through it with the end in a pot, tasted nice.I pumped the lever it's full travel for about 5 minutes whilst listening to the radio, and it didn't leak. The bigger O-Ring is a bit tight in the bore though, so I'm planning on taking it out a bit more, hopefully I'll get the deepest scratch out! (From where the spring rusted and snapped and took a gouge out of the side of the bore).Should be able to test it soon, I have bits on the way that I will be able to use to make a front maggy, so I'll wack that on the T-Pro and see how it fares. Quote Link to comment Share on other sites More sharing options...
Will Arnold Posted September 19, 2009 Report Share Posted September 19, 2009 hone the thing if you can get a small enough honing tool.my mates having this exact same trouble, looks like its '04 magura time again Quote Link to comment Share on other sites More sharing options...
Muel Posted September 19, 2009 Author Report Share Posted September 19, 2009 You can, but the adjustable ones only allow you to hone open ended bores, this one is closed so the nut and adjuster thing on the end won't let it fit properly.I could just get a fixed one, then get Daddy to make a new piston for it, but this method has cost me nothing so far. Quote Link to comment Share on other sites More sharing options...
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