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#1
12-19-2014, 09:35 PM
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proportioning valve in a w123 wagon?
I had a dragging caliper on the left rear. So I figured I would replace both calipers, pads and rotors all in one shot. Everything went smooth as glass until I went to bleed the system.
Some fluid came out and then just stopped on the left rear. I have yet to touch the right caliper. I disconnected the rubber line from the hard line and pressed the brake, nothing came out and the petal had no resistance. I have a master cylinder on its way now but is there a proportioning valve that I am not seeing on this wagon? 
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Jonathan Valadez Also own: 1976 Chevrolet Monte Carlo. 
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#2
12-20-2014, 09:52 AM
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There is no proportioning valve or anything else upstream that could be causing what you describe.
I am not experienced enough with bleeding brakes to offer any advice beyond: keep pumping. You own a '76 Monte? The car of my teenage dreams. Dad almost bought one but he decided on a Malibu Classic instead (but at least it had the ralleye wheels).
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 Mac 2002 e320 4matic estate│1985 300d│1980 300td Previous: 1979 & 1982 & 1983 300sd │ 1982 240d “Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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#3
12-20-2014, 09:55 AM
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fill the reservoir back up.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#4
12-20-2014, 12:02 PM
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I believe a proportioning valve is redundant on a car with load sensing suspension. Without, that is another matter.
Last edited by fahrvergnugen; 12-25-2014 at 12:23 PM.
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#5
12-21-2014, 12:53 AM
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Ended up being a bad master cylinder. I looked all over the lines for a valve and thought maybe I was loosing it. Just wanted to make sure it did or did not have one from the factory.
Yup Zacharias I own a '76 triple black Monte Carlo Landau. 
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Jonathan Valadez Also own: 1976 Chevrolet Monte Carlo.
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