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Old 05-14-2001, 10:20 AM
Mike Murrell's Avatar
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Join Date: Feb 2000
Posts: 2,359
Searched the archives for an existing procedure. Didn't find one.

Would someone post the process for performing this task?

Thanks for your time.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
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Old 05-14-2001, 12:39 PM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,878
Mike - the master cyl

SHOULD come with an instruction sheet showing how to bench bleed. In addition, it should come with these little hoses/connectors. You install the reservoir onto the new mc and then hook the hoses/connectors up to the discharge ports of the mc and route the hoses to dump back into the reservoir. Put brake fluid in the reservoir and pump the rod on the mc until you do not get anymore air bubbles coming back through the tubes then install the mc on the booster. Keep level in the reservoir while you pumping.
This is the way I do it. Some techs may have a better way.
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Old 05-14-2001, 05:21 PM
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engatwork said it

Brother of The Benz,
Now do it and your though.
Happy Trails Beep Beep from the Spiderman in Houston!!!
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Old 05-14-2001, 05:53 PM
Mike Murrell's Avatar
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Join Date: Feb 2000
Posts: 2,359
Jim - thanks for the information.
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
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Old 05-15-2001, 12:12 AM
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Join Date: Feb 2001
Location: Midwest, USA
Posts: 171
Hey Donald, how come you changed your name and got to keep your posts? I lost my identity and my posts are no longer associated with me. Bummer, but it's a pleasure to have you back posting. Thanks for the email.


"Savin' those seventies beauties"
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Old 05-16-2001, 11:45 AM
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Just Lucky

Brothers(Sister) of The Benz
Hi Patsy, Thanks for the welcome back.
I didn't change my name, only add to my sign off salutaion after replying to a thread.
The fellow members added "Diesel and Spiderman" after my encounter being bit by a spider and being hospitalize those long days.
I still have the same username and password.
Happy Trails Beep Beep from The Spiderman in Houston!!!
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Old 05-17-2001, 12:01 AM
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Join Date: Apr 2001
Location: Beech Island, S.C.
Posts: 468
Bench Bleed Master Cylinder

I have never had to bench bleed a master cylinder in my entire career of Mercedes Benz experience. Simply install the master cylinder and do not completely tighten the lines and pump the brake pedal till fluid pumps out clear. Have someone to pump the pedal and hold it down until you tighten the lines and 99 out of a hundred your ready to go.
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