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 Posted: Jul 28, 2018 03:22AM
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US
 Posted: Jul 27, 2018 09:48PM
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CA
Cannot seem to find the master or kit on MM
master is the type mounted atop the servo...  1988>

 

"Everybody should own a MINI at some point, or you are incomplete as a human being" - James May

"WET COOPER", Partsguy1 (Terry Snell of Penticton BC ) - Could you send the money for the unpaid parts and court fees.
Ordered so by a Judge

 

 

 

 Posted: Jul 26, 2018 05:21AM
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US
+2

If the pedal slowly sinks and there is no fluid leaking out of the system, the fluid is getting by the internal seals of the master cylinder.

Doug L.
 Posted: Jul 26, 2018 03:28AM
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CA
Yup. When you press the pedal fluid is leaking past the piston seal or seals if it is a tandem master cylinder. When you lift up, the shape of the seals allows fluid to return easily for the next stroke. Most likely tired or worn seals but the bore may be worn too.

.

"Hang on a minute lads....I've got a great idea."

 Posted: Jul 25, 2018 04:48PM
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CA
Had the same issue and ended up rebuilding the master.  Fixed the issue for me.

 Posted: Jul 25, 2018 03:56PM
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CA
New issue for me....

i had the need to brake brake quick and hard yesterday. I stopped.... but near coming to a complete stop the pedal went slowly to the floor 
fluid level is good, no wet cylinders or calipers
car is an 89 with master over top of the servo
Is this a master cyl issue typically?

 

"Everybody should own a MINI at some point, or you are incomplete as a human being" - James May

"WET COOPER", Partsguy1 (Terry Snell of Penticton BC ) - Could you send the money for the unpaid parts and court fees.
Ordered so by a Judge