Author Topic: Bleeding the Brake Fluid from the Caliper Nipples  (Read 5308 times)

Abbas

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Bleeding the Brake Fluid from the Caliper Nipples
« on: February 10, 2007, 06:27:47 »
Hello all,
 I thought bleeding the brake fluid would be a good 2nd step to renew various fluids on my car - I have already flushed my radiator few weeks ago. This procedure was taken from the Haynes book p.152

Here are the tools used:
5 mm hose, fresh brake fluid, disposable bottle, and a 9 mm wrench.
Download Attachment: P210007.JPG 66.17 KB

As you can see I have immersed one end of the tube in the fresh brake fluid and fixed the tube by tightening it in a hole cut in the bottle's cap. Immersing the tube in oil is important to prevent air from entering into the circuit through the nipple when opened. Haynes book recommends using a tube with a non-return valve.

Then the other end of the hose was inserted around the nipple which was then loosened two notches. Then I started pressing the brake pedal to push the old oil out of the system into the bottle.
Download Attachment: P210008.JPG 77.7 KB

To my surprise here is the old brake oil coming from the circuit beside the fresh oil.
Download Attachment: P210009.JPG 55.91 KB

Please note you need to watch that the brake reservoir does not go below the min level and that you keep on adding brake fluid as you bleed the circuit. In this case to prevent air from entering into the circuit from above.

Abbas

280SL W113 1969 Ivory
E280 W124 1995 Silver
« Last Edit: February 10, 2007, 06:34:27 by Abbas »

Cees Klumper

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Re: Bleeding the Brake Fluid from the Caliper Nipples
« Reply #1 on: February 10, 2007, 08:17:59 »
Thanks for the detailed procedure - that sure is a big ' before and after' difference!

Did you happen to notice a difference in the braking effectiveness or feel?

Cees ("Case") Klumper in Amsterdam
'69 white 280 SL automatic
Cees Klumper
1969 Mercedes 280 SL automatic
1968 Ford Mustang 302 V8
1961 Alfa Romeo Giulietta Sprint Coupe 1600
1962 FIAT 1500S OSCA convertible
1972 Lancia Fulvia Coupe 1.3
1983 Porsche 944 2.5
1990 Ford Bronco II