Changing Brake Fluid

Rebuilding, adjusting, maintaining & alternatives

Changing Brake Fluid

Postby AbleBaker » Wed Jul 10, 2019 7:54 am

I bled the brakes the way the book says.

Sucked out fluid out of the master cylinder.
Put new fluid in the M/C
Pumped fluid through the first front wheel cylinders until I got clean fluid.

Pumped fluid through the second front wheel cylinders until I got clean fluid.
Gave it 3 more pumps for luck.

Dismantled that sides brakes.
Held the down facing piston in with a zip tie.

Gave 1.5 pumps to push the up facing piston up.
Removed the steel piston, the rubber cup, and the springy doofer.

Stuck a syringe down the cylinder.
Sucked fluid out.

The fluid I sucked out was diluted 50 / 50 with new fluid.
When I pumped the piston up.

Your comments please :)
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Re: Changing Brake Fluid

Postby woodywoodchipper » Wed Jul 10, 2019 3:30 pm

its not unusual to have some old fluid present, unless you do a complete strip down, you can try running it through again,
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Re: Changing Brake Fluid

Postby AbleBaker » Wed Jul 17, 2019 3:33 pm

I think you could change the fluid the normal way 1000 times,
without shifting more than a smidgen of the knackered fluid Woodie :(

Fluid, like water and the cops :o always takes the easiest way.

The easiest route is straight from pipe into the cylinder to the bleed nipple.
The holes / ports are only about 1/2" apart.
!2mm if you are in to Napoleon's funnies.

The only way to get the knackered fluid out is to remove the seals.
Sorry :- but that's it and all about it.

Different with disc brakes.
As long as you push the piston in as far as it will go,
you're gonna remove most of the knackered fluid.

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writes short lines :o
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