Master brake cylinder

kato Disco · Jan 5, 2013

I have recently replaced the front callipers , all three flexible hoses have be changed for braided good ridge ones also. New rear brake lines.

Following these alterations I couldn't get a solid pedal with the engine on, it is fine when off. I bled the system using easy bleed and the standard two man operation.

Using easy bleed the fluid is clear of bubbles until the pedal is pumped then I get air from every bleed nipple. So I changed the master cylinder for a new one (britpart, Nuff said). The problem remains exactly the same.

My thoughts are that I have just been unfortunate and got a duff ms.

Forgot to mention its a 1985 defender stylie 90, with rear early discovery axle and disc brakes.

Any ideas folks. Cheers.

easye1 · Jan 5, 2013

just a long shot, but try bleeding each axle at a time, thats two bleed jars at once,.
i`d start at the front..

anyone else can improve on my ideas ?

bencorkill · Jan 5, 2013

They take ages to bleed

ive given up very time and got local garage to use there vac bleeder on it

easye1 · Jan 6, 2013

my grey matter stirs..
does my disco have 3 bleed nipples on each front caliper,

did I bleed the main 2 at the same time ??

the grey matter suggests all 3 nipples being bled at the same time via 3 rubber pipes with 2 windscreen washer pipe type T pieces joining the 3 into one pipe into jamjar with fluid in bottom.
no good a drawing but,
bleed rubber pipe to the 2 side nipples join in 1 T piece
the middle nipple bleed rubber pipe goes to the 2nd T piece along with rubber pipe from 1 T piece,
the end rubber pipe goes into jamjar..

does that make sence??
I had to daw it out on paper to see if it works.

N.....................N.................N
........T.................................
.....................T...................
.....................I....................
.....................I....................
.................jamjar..................

N=nipples
T=t pieces
I= rubber blead pipe
to jamjar

one person pushing brake peddle,
tother with spanner on all 3 bleed nipples,
oh, and topping up brake reserviour bloody quickly.

it`ll be,
push,
then woosh into jamjar

kato Disco · Jan 6, 2013

easye1 said:
my grey matter stirs..
does my disco have 3 bleed nipples on each front caliper,

did I bleed the main 2 at the same time ??

the grey matter suggests all 3 nipples being bled at the same time via 3 rubber pipes with 2 windscreen washer pipe type T pieces joining the 3 into one pipe into jamjar with fluid in bottom.
no good a drawing but,
bleed rubber pipe to the 2 side nipples join in 1 T piece
the middle nipple bleed rubber pipe goes to the 2nd T piece along with rubber pipe from 1 T piece,
the end rubber pipe goes into jamjar..

does that make sence??
I had to daw it out on paper to see if it works.

N.....................N.................N
........T.................................
.....................T...................
.....................I....................
.....................I....................
.................jamjar..................

N=nipples
T=t pieces
I= rubber blead pipe
to jamjar

one person pushing brake peddle,
tother with spanner on all 3 bleed nipples,
oh, and topping up brake reserviour bloody quickly.

it`ll be,
push,
then woosh into jamjar

Three nipples per calliper? I have only ever seen one. What am I missing here.

livers · Jan 6, 2013

My disco also has several other bleed points, nightmare to do the first time.

Master brake cylinder

kato Disco

Well-Known Member

easye1

Banned

bencorkill

Well-Known Member

easye1

Banned

kato Disco

Well-Known Member

livers

Well-Known Member

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