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Post by mightlife on May 4, 2013 16:04:34 GMT
JODER!
KURWA!
FODE SE!
BLYAT!
(censor that)
Just hope I've learnt my lesson.
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Post by gixanator on May 6, 2013 17:02:49 GMT
oops.
i know it's probably rude to ask but have you any details on the seal arrangement?
i have a set of Nissins like yours ready to rebuild and i had no idea there was a right and wrong way.
sorry to hopefully learn by your (bad) experience!
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Post by mightlife on May 6, 2013 20:57:24 GMT
oops. i know it's probably rude to ask but have you any details on the seal arrangement? i have a set of Nissins like yours ready to rebuild and i had no idea there was a right and wrong way. sorry to hopefully learn by your (bad) experience! No problem. I've calmed down now anyway  I should update things a little though; it seems that the leak is actually from the bleed nipples rather than the piston seals. I may well have a problem with the seals, but I won't know until I get the leaking nipples (ooer) sorted out. To be honest I'm a bit stressed out by the whole thing. When I bleed the brakes and open the bleed nipple even slightly, it leaks from the base when I pull the lever rather than fluid escaping from the nipple hole. I can't find any debris that might be stopping the nipple valve from making a decent seal. Aaaanyway.. Apparently, the piston seals - i.e. the lower ones (not the upper, dust seals) are actually chamfered and, when they are installed properly, have an edge that sticks out creating the seal. Check out this (2 part) video about it: |
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Post by gixanator on May 7, 2013 9:58:27 GMT
hi and thanks for the reply.
on the nipple front (!) there is no seal i'm aware of, it just seats on the ali of the caliper and to be honest most liquids find the path of least resistance which should be the big hole up the middle of the nipple.
why yours is finding a less direct path means you must have a blocked nipple or possibly you're not opening it enough to give a clean route through the nipple maybe(?).
if all else fails go to Boots and buy a syringe so you can attach it to the nipple and when you crack it, suck with the syringe to tempt the fluid in the right direction.
all this talk of nipples and sucking might be a bit much this time of the morning but i've seen worse on OSS!!!!!!
by the way , you didn't say what paint you used, i've used Hammerite satin black that's been hardening in the spare bedroom for a few weeks, will this withstand brake fluid (i don't envisage your problem with the fluid)?
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Post by mightlife on May 7, 2013 13:53:12 GMT
You're very welcome. Yea, Del (from the video) has suggested that the nipple isn't seated correctly due to debris somewhere in the thread, who knows. I'm going to tackle the problem later when my build is nearing completion (and get someone more experienced than me to have a look ). I just used regular primer, enamel, and a layer of clear coat. I can't comment about the resistant properties of Hammerite I'm afraid, I've never used it. However, I'd still be careful that you don't get brake fluid anywhere! Remember, if it is Very High Temperature paint, it will only cure properly when heated. Nip! Nip! |
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Post by bluedog59 on May 8, 2013 18:33:19 GMT
I think the dual colour calipers would be a stroke of genius. If you're not going to leave them that way consider the idea stolen.  |
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Post by mightlife on May 8, 2013 19:36:39 GMT
I think the dual colour calipers would be a stroke of genius. If you're not going to leave them that way consider the idea stolen. Thank you. Steal away. Just make sure you have a working system and or be careful about where you get the brake fluid |
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Post by canamant on May 9, 2013 21:55:51 GMT
I had the seals in and out of my calipers trying to get them to operate smoothly. I put the seal in one way then the other and there appeared to be a lip whichever way round I fitted them. I came to the conclusion that it's the way they sit in the groove that distorts them and forms the lip. I have seen other seals which were handed but not these. Anyway the brakes were crap no matter what I did so I fitted twin pot lockheeds - no problems any more.
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Post by mightlife on May 9, 2013 22:42:09 GMT
I had the seals in and out of my calipers trying to get them to operate smoothly. I put the seal in one way then the other and there appeared to be a lip whichever way round I fitted them. I came to the conclusion that it's the way they sit in the groove that distorts them and forms the lip. I have seen other seals which were handed but not these. Anyway the brakes were crap no matter what I did so I fitted twin pot lockheeds - no problems any more. Twin pot Lockheeds? If there's a relatively easily done mod that improves the braking, that would be good. Do tell. |
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Post by gixanator on May 13, 2013 10:58:58 GMT
can i just ask:
i've heard tell of "red" grease that should be used on brake rebuilds, i have a tube of it but it's not mentioned in Dels YouTube vid.
am i imaging things or should it be used and if so where!?!?!?
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Post by bluedog59 on May 13, 2013 18:08:14 GMT
Put a little dab of it on the seals when you fit them. It helps them sit properly and helps the piston slide smoothly.
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Post by gixanator on May 13, 2013 18:18:04 GMT
so use it like vacuum grease, just a smear on the seals?
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Post by bonzo on May 14, 2013 19:12:19 GMT
When I had a small leak from the base of one of my bleed nipples I just wrapped a bit of PTFE tape round it.
Seemed to do the trick.
ps I've found the four pot Nissins to be top notch, much better than the six pot Tockicos which can be a farkin nuisance.
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Post by canamant on May 14, 2013 19:53:38 GMT
Mightlife, it's a really simple mod. Caliper adapter plate mounted to outside of fork leg lugs, with caliper spaced about 18mm inboard of the plate- I used 2 17mm M10nuts as spacers on each lug when setting up and made the plate template from clear polycarbonate so I could see where the holes needed to be.plate was 8mm thick. Slabby Racer 2 was fitted with this arrangement but Slabby Racer 1 had slingy calipers which had an inconsistent lever when repeated hard stops were called for. Not spongey just more travel with no resistance then the usual solid feel. This was not what I wanted approaching placs like Quarterbridge, Braddan, Sulby Bridge or Creg Ny Baa so I went Lockheed on Slaby Racer 1 as well. When Junior brings the camera home I'll put up pictures. The mod is about 250 quid if you buy new.
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Post by mightlife on May 14, 2013 20:25:45 GMT
When I had a small leak from the base of one of my bleed nipples I just wrapped a bit of PTFE tape round it. Seemed to do the trick. Thanks, I'll try that. Mightlife, it's a really simple mod. Caliper adapter plate mounted to outside of fork leg lugs, with caliper spaced about 18mm inboard of the plate- I used 2 17mm M10nuts as spacers on each lug when setting up and made the plate template from clear polycarbonate so I could see where the holes needed to be.plate was 8mm thick. Slabby Racer 2 was fitted with this arrangement but Slabby Racer 1 had slingy calipers which had an inconsistent lever when repeated hard stops were called for. Not spongey just more travel with no resistance then the usual solid feel. This was not what I wanted approaching placs like Quarterbridge, Braddan, Sulby Bridge or Creg Ny Baa so I went Lockheed on Slaby Racer 1 as well. When Junior brings the camera home I'll put up pictures. The mod is about 250 quid if you buy new. 250 pahnd! Hmmm..I'll have to wait for that one, must admit, I'm not the level of rider who would be pushing the bike to it's limits anyway. Cheers though. |
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