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PostPosted: Fri Apr 22, 2011 8:38 am 
MacRetro rider
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Joined: Sat Jan 05, 2008 11:58 pm
Posts: 4434
Location: Third stone from the sun.
Right, at the end of my freakin, frickin, featherin rag with the brakes on the DH8 :x

They are Hope Mono6 with Goodridge hose and Finish line fluid.

Story goes, they were working reasonably well when i got them, fitted the Goodridge hoses and bled with the Finish line mineral fluid, they were then ok, not fantastic (as i imagined six pots would be :roll:), bike was hardly used over the winter, brake levers slowly started to seize/stick, bought seal kits from CRC last week (genuine Hope kits), was feeling flush so i splashed out on a full set of gold Scintered Hope pads, spent two hours in the kitchen on it last night, fitted the seal kits (very fidly), fitted new pads, bled the brakes with the Finish line, got them working ok, job done, i thought ?

Down in the kitchen thismorning levers are sticky again :roll:, WTF :?, removed the top cap on one and the seal is swelled up and distorted, i imagine this is whats happened to the seals on the piston in the cylinder causing the stickyness ?.

Any ideas ?, could the Finish line fluid be causing this ?

Need to get it sorted soon, was in love with the bike last night, cant stand the sight of the thing now, feel like cutting my losses, getting shot as is :roll:


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PostPosted: Fri Apr 22, 2011 9:15 am 
MacRetro rider
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Joined: Sun Jun 08, 2008 11:22 pm
Posts: 175
Location: Edinburgh
I thought Hopes need dot 4/5.1? I do know you can get manuals from hopetech.com if that's any use?

I might not be the best to listen to, what with my success at bleeding hydraulics though...


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PostPosted: Fri Apr 22, 2011 10:00 am 
Moderator /Lincs, E & S Yorks Deputy AEC
Moderator /Lincs, E & S Yorks Deputy AEC
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Joined: Mon Nov 26, 2007 6:16 pm
Posts: 4144
Location: RetroModding™ since 1988
As far as I know Hope have always used Dot fluid, all the Hope brakes I've used were Dot anyway.

Quite often the fluid required is marked on the reservoir cover of the master cylinder

Double check with the manual if you can find it online, or hopefully someone who owns those exact brakes will know 100% for sure


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PostPosted: Fri Apr 22, 2011 10:59 am 
MacRetro rider
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Joined: Sat Jan 05, 2008 11:58 pm
Posts: 4434
Location: Third stone from the sun.
Just checked, you are both right, cap says Dot 4-5.1, small print on Finish line bottle says not compatible with Dot fluids :(

Looks like it'll need to be new seals and Dot fluid, hope i have'nt damaged the seals in the calipers :roll:


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PostPosted: Fri Apr 22, 2011 12:18 pm 
P.o.T.M. Winner / MacRetro Rider
P.o.T.M. Winner / MacRetro Rider
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Joined: Fri Jan 23, 2009 1:03 am
Posts: 5502
Location: In the foothills of the foothills of The Cairngorm Massif :D
Another vote for cable discs :!:

:P


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PostPosted: Fri Apr 22, 2011 5:09 pm 
MacRetro rider
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Joined: Thu Dec 24, 2009 1:49 pm
Posts: 183
Location: Democratic republic of Coquetdale
What would you rather use as a pressure transmission medium to make your brakes work. BRAKE fluid or cooking oil?*


* for me the clue is in the name. :wink:


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PostPosted: Fri Apr 22, 2011 9:12 pm 
Gold Trader / MacRetro rider
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Joined: Fri Sep 05, 2008 6:36 pm
Posts: 4950
Location: Edinburgh
To be fair,

Mine are bled to perfection and Im really underwhelmed with the initial bite and power from my 6 pot hopes too :?

Thinking of going proper modern and geting Saints :oops:

G


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PostPosted: Fri Apr 22, 2011 9:52 pm 
Gold Trader / MacRetro rider
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Joined: Fri Jan 30, 2009 10:04 pm
Posts: 8771
Location: scotland
Enid_Puceflange wrote:
To be fair,

Mine are bled to perfection and Im really underwhelmed with the initial bite and power from my 6 pot hopes too :?

Thinking of going proper modern and geting Saints :oops:

G



wait til you've try'd mine :wink: bet your running those cheapo sintered pads :lol: :lol: :lol:


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PostPosted: Fri Apr 22, 2011 10:58 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Fri Sep 05, 2008 6:36 pm
Posts: 4950
Location: Edinburgh
big.eck wrote:

wait til you've try'd mine :wink: bet your running those cheapo sintered pads :lol: :lol: :lol:


Probably :oops:
Same pads that came on them when i swapped for my M4's for the 6's

What you got fitted to yours Eck? :?

G


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PostPosted: Fri Apr 22, 2011 11:08 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Fri Jan 30, 2009 10:04 pm
Posts: 8771
Location: scotland
top secret :wink: but if you likey i'll point them out to you :lol: :lol: :lol:


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