Johnboyo
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 posted on 2/4/11 at 08:15 PM |
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Master Cylinders - Help!!!
Hi Folks, This may seem like a strange question!
I am in the final stages of building a locost se7en and I am about to finish off the brakes. I am using what I presume is a Sierra master cylinder.
However it has 3 "holes" to connect the brake pipes up to. I am usung a dual circuit system and am not usung a servo. How do I do this?
Can I do this? Does one of the holes get blanked up?
Your help and comments would be appreciated.
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Daddylonglegs
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| posted on 2/4/11 at 08:23 PM |
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Hi, welcome to the forum.
I am also using the Sierra type M/C and have used 2 of the 3 for the front and rear brakes. The one on the end (at the front) I have fitted with a
bleed nipple. I did that to help bleed the M/C when i filled the system.
Seemed to work fine for me.
HTH
John
BTW, it's not a strange question at all 
[Edited on 2/4/11 by Daddylonglegs]
It looks like the Midget is winning at the moment......
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Hellfire
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| posted on 2/4/11 at 08:23 PM |
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Welcome to the madhouse. Front two holes used for offside and nearside brakes. Rear used for back brakes with a tee-piece at the rear to split offside
& nearside.
Phil
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Ben_Copeland
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| posted on 2/4/11 at 08:24 PM |
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3 Holes... 2 for the front, one for the back. OR 1 for the front, 1 for the back and one for the back light switch...
Do you need help connecting it up to the brake pedal as well?
Ben
Locost Map on Google Maps
Z20LET Astra Turbo, into a Haynes
Roadster
Enter Your Details Here
http://www.facebook.com/EquinoxProducts for all your bodywork needs!
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Daddylonglegs
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| posted on 2/4/11 at 08:25 PM |
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Oh bugger! Does that mean mine needs re-doing then Phil? 
It looks like the Midget is winning at the moment......
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austin man
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| posted on 2/4/11 at 08:28 PM |
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deffo 2 for the front one for the back the brake pressure switch can go in any line and as Phil Says the back splits via a T Piece. Fronts are on
seperate circuits
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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adithorp
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| posted on 2/4/11 at 08:33 PM |
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quote:
Originally posted by Daddylonglegs
Hi, welcome to the forum.
I am also using the Sierra type M/C and have used 2 of the 3 for the front and rear brakes. The one on the end (at the front) I have fitted with a
bleed nipple. I did that to help bleed the M/C when i filled the system.
Seemed to work fine for me.
HTH
John
BTW, it's not a strange question at all
[Edited on 2/4/11 by Daddylonglegs]
That won't work mate!... if I understand correctly and you have both front and rear connected to one end of the cylinder. It's a tandem
cylinder so if one circuit (front/rear) fails/ leaks then you still have some brakes via the other. How you have it if you get a leak you loose ALL
brakes. You need the front connected to one end (using either 1 hole and a T joint or 2 holes) and the rear connected to the other end (agiin the 1 or
2 holes). If you just connect to 1 front and 1 rear hole then put a bleed nipple in the spare.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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contaminated
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| posted on 2/4/11 at 08:38 PM |
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On my old sierra setup I ran one port to the rear (via a T Piece) and one each to the fronts.
HTH
Dan
Tiger Super Six Independent
www.southernkitcars.com
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Johnboyo
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| posted on 2/4/11 at 08:44 PM |
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Brilliant!!! It all becomes clear!!
Thanks for your help everyone, I shall let you know how I get on. An trying to get it ready for an autotest in 2 weeks time. Ithink I might be
being a bit optimistic though!
BTW. Is there anywhere on the forum to upload photo's of your build?
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avagolen
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| posted on 2/4/11 at 08:49 PM |
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Photo Archive?????
Just have a wee gander at the top of the page
U2U | Member List | Search | Photo Archive | Chat | Links | Shop
seeeeeeemmmm's to be up there
Cheeky am I not !!!
Len.
The Answer for everything, but never the last word....
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Daddylonglegs
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| posted on 2/4/11 at 09:03 PM |
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I have actually got the rear hole connected to the pipe off to the rear end then split via a 'T' for the rear brakes, then the middle hole
connects off to a 'T' which splits off to left front and right front. The very front hole is the one I have fitted with a bleed nipple.
It's a relatively straight forward job to change so the left goes to one of the front holes and the right to the other, so I think I will do
that tomorrow as it seems to be the correct way.
Thanks guys.
It looks like the Midget is winning at the moment......
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adithorp
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| posted on 2/4/11 at 09:25 PM |
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It makes no practical difference whether you have the two sides connected to one master cyl' outlet (and the other blocked) and then split via a
T peice, or seperatly to the two adjacent outlets. The only difference is 2 extra brake pipe connections at the T piece to leak if you get them wrong
with it one way and another length of pipe to locate the other.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Daddylonglegs
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| posted on 2/4/11 at 09:41 PM |
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So I assume then that the way I have it connected is OK?
It looks like the Midget is winning at the moment......
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adithorp
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| posted on 2/4/11 at 09:45 PM |
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Apart from being a little confused by you saying "middle hole"... I think so. A picture would confirm.
It's just a packaging choice as to which way works best for for you with the choice of pipe runs in practical terms.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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Johnboyo
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| posted on 2/4/11 at 09:46 PM |
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quote:
Originally posted by adithorp
It makes no practical difference whether you have the two sides connected to one master cyl' outlet (and the other blocked) and then split via a
T peice, or seperatly to the two adjacent outlets. The only difference is 2 extra brake pipe connections at the T piece to leak if you get them wrong
with it one way and another length of pipe to locate the other.
Which would you reccommend is the best way? I have the system placed in such a way that i would only require to add a bleed nipple - but if I have to
change to the 2 separate lines on the front it requires a bit more hassle.
[Edited on 2/4/11 by Johnboyo]
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