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Post by Deleted on Mar 18, 2008 16:45:50 GMT
I had a new clutch fitted yesterday, and ever since my brakes have gone haywire!
There servo assisted standard all round, When manuvering our just ticking over there fine but as soon as you give it ny beans they give up, and the pedal just hits the floor, if you let of and push the pedal again everything is back to normal accelerate again and theres nothing there! i was told this colud be an air leak on the servo but i cant seem to find one all the hoses and lines apear to be ok, just strange how one minute they're there and the next they're totally gone, bit scary!!
any ideas??
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Post by Miniböttcher on Mar 18, 2008 18:59:32 GMT
re bleed your brakes and then see what happens, was the servo knocked, moved or any pipes taken off ,to do the clutch,  ? it would be very hard to change the clutch with the servo in its normal place as it over the top of the clutch housing. re bleed your brakes first, if that does not work, let us know in hear and see if we can think of the next thing !!!!!!!!!!!!!!!!! "start simple first" !!!!!!!!!!!!!!!!!! |
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Post by Deleted on Mar 18, 2008 19:22:21 GMT
I was planning on fitting goodridge hoses tomorrow, so i'll have to then, i'll see what happens, starnge how they come and go though i would have thought an air lock would be obvious all the time
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Post by Miniböttcher on Mar 19, 2008 9:14:12 GMT
the servo is pressurised off your engine , thats why the pedal goes hard when you use the brake with out the engine on
there must be a air lock
good luck,
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Post by Simon1275mpi on Mar 19, 2008 13:00:28 GMT
Strange one, a faulty servo will make the brakes more difficult to use not easier. So I found...
But you say the peddle loses its hardness, brakes go soft?
As dean said, an airlock in the brake line, but that was not disturbed. Did you remove, unbolt the servo to gain better access to the clutch? Check the servo is ALL the nuts and bolts sercured?
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Post by Deleted on Mar 19, 2008 15:16:03 GMT
The servo was removed, but i checked it over and it all seems to be fine, i discovered a leak on the rear drum this morning, going to have a proper look at it in a bit.
Every day there seems to be a new problem recently!!!
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Post by Miniböttcher on Mar 19, 2008 20:18:24 GMT
welcome to the mini, remove one thing and something else goes wrong, and then the next thing, well at least you found the leak before you crashed it, or damages you drum and shoes, just sort it sooner than later,
you might as well check the other side and clean and grease up all points that need it which do not get do very often, wheel bearings, radius arms, hand brake cable on the subframe and make sure your adjuster screw on the back of the drum is free and put copper ese on it to stop it rusting in place
as you servo was removed your brakes will need re bleeding you can not just bolt it back in once you have taken it out
hope it helps
dean
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Post by oldgit on Mar 19, 2008 20:32:53 GMT
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Post by Deleted on Mar 19, 2008 20:43:25 GMT
Never had a mini with a servo before ant to be honest theres not a lot of differenc just a lot less space under the bonner!!!
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Post by monkeyjim on Mar 19, 2008 22:06:43 GMT
you sure all the brake pipe connections in the engine bay are tight ?
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Post by Deleted on Mar 19, 2008 22:14:22 GMT
will be tomorrow, i'm going to ruplace most of it
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Post by Deleted on Mar 21, 2008 15:19:58 GMT
Right, i've replaced all the pipes at the front that looked dodgy, fitted goodridge hoses, checked all the connection bled the whole system twice and i still have no brakes!!
Please sombody help me, i'm really starting to lose my patiance!!!!!!!!
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Post by Miniböttcher on Mar 21, 2008 22:33:00 GMT
what kind of servo is it one that is bolted to the bulk head and has the master cylinder on top of it( like on later minis) or is it one that bolted to your inner wing and is seperate to your master cylinder( like on early minis)
were you getting good fluid passing through all bleed nipples or was one a bit poor
did you fix the leak you found on the rear,
what mark of mini is it.
it still sounds like a air lock somewhere, did you have someone help to bleed the brakes or have you got a self bleed kit,
sorry there are so mant questions its just so we can get more of a idea about your car
dean
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Post by Deleted on Mar 22, 2008 10:05:09 GMT
Hi ate, it's the newer style of servo, bolted to the bulkhead, I'm going to remove it tomorrow and not bother with a servo atall, i fixed the leak on the rear and i did have a good flow on all nipples, although it does have 2 lefthand calipers on the front! maybe this is why it wont bleed properly??
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Post by paul1275s on Mar 22, 2008 13:50:50 GMT
If you have two left hand calipers, the one that is fitted to the right hand side will have the bleed nipple at the bottom of the caliper which will prevent you from being able to bleed the brakes. There will be an air pocket at the top of that caliper.
Get the correct caliper and I'm sure it will all work.
Also if you are you are using the old pump pedal method of bleeding on an old master cylinder, the action of pushing the pedal through its full travel can cause the seals within the master cylinder to fail, this is because they are being pushed over an area of the cylinder which is not normally swept when the brakes are working correctly, this area can contain crud thus causing the seals to fail and then no pressure.
Start with a proper caliper, try bleeding with that, then look at the master cylinder/servo.
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