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PostPosted: Wed Sep 14, 2011 10:29 am 
Dirt Disciple

Joined: Fri Mar 11, 2011 11:12 pm
Posts: 20
Location: Russia, Moscow
Hello,
Some times ago I bought a strange Hayes calipers. I know that is old pre-G1 style but what years is it??? How it work?
If I understood right - it's "closed" (there are 2 bleeding valves on caliper!!!) hydro system, BUT with using mechanic brake levers? Am I right?
Somebody used this system? May be have a catalog or review?
Thanks!


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PostPosted: Wed Sep 14, 2011 11:24 am 
Retro Guru
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 2562
Location: Herts UK
interesting having two bleed nipples but you would use the one that is uppermost when fitted.

I would guess it has two either because there may have been more half castings to make up different calipers (it is two pieces) or it is there so when mounted on front fork, one nipple is used for bleeding as it is upper most but other bleed niple is uppermost when on the rear. (mounting on rear could be outside the chain stay or within it, the latter being an early and now abandanoned design).

strange mounts though - are they post mount compatible or require an adapter?


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PostPosted: Wed Sep 14, 2011 11:52 am 
Gold Trader
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Joined: Fri Mar 24, 2006 6:49 pm
Posts: 2810
Location: Bracknell,East Berkshire.
My 2p worth........ it's a cable actuated hydraulical caliper. The cable goes straight in the top, as seen from your first picture, fixed with a grub screw. I'd think of the two bleed nipples as an "in" and an "out" , bleed from the lower to upper with a syringe. (total guess work here). I remember seeing these on GTs in late nineties (97/98?) - they weren't a great brake, but I guess it was cheaper to produce that a full hydraulic system at the time.


Last edited by Reluctant on Wed Sep 14, 2011 2:39 pm, edited 1 time in total.

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PostPosted: Wed Sep 14, 2011 2:38 pm 
BoTM Winner
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Joined: Fri Dec 28, 2007 9:50 pm
Posts: 263
Location: Ontario, Canada
Reluctant is right, it is a cable actuated hydraulic caliper. They only made them for a year or two and were not popular.


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PostPosted: Wed Sep 14, 2011 2:53 pm 
Dirt Disciple

Joined: Fri Mar 11, 2011 11:12 pm
Posts: 20
Location: Russia, Moscow
Thanks for help! I was right :)
And now I don't know where to use it :( .... Need to buy mech brake levers


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PostPosted: Wed Sep 14, 2011 3:15 pm 
Retro Guru
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Joined: Mon Jun 14, 2010 9:06 pm
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Location: Herts UK
well there you go, you learn someting every day - I assumed the "cable in" was the port for cnnectng brake hose but can now see the plunger.

interesting design, should work with either a v-brake lever or cantilever brake lever - my guess again.

PS is it snowing yet in Moscow?


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PostPosted: Wed Sep 14, 2011 6:21 pm 
BoTM Winner
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Joined: Fri Dec 28, 2007 9:50 pm
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Location: Ontario, Canada
They would need a v-brake lever, were made in 1999.


It was supposed to be an easier and cheaper way to get people using discs from what I recall. I have one of the Dia-comp discs from the mid-90's that works the same way, makes no sense at all really. But I still want to try using it someday just to see how useless they are.


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PostPosted: Wed Sep 14, 2011 7:17 pm 
Dirt Disciple

Joined: Fri Mar 11, 2011 11:12 pm
Posts: 20
Location: Russia, Moscow
02gf74 wrote:
PS is it snowing yet in Moscow?

Haha:) No, today was great - sunny and +16-18C temp.....Even in "cold" Syberia still comfortable - +15C
Probably snow come in Moscow in the end of November or even early December.... It's true!

Baulz thanks for answer.


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