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85 300D Brake Master Cylinder
How does one dis-assemble the MC. I have the c-clip removed, a pin inside one of the reservoir ports is also removed. Twist and pull isn't working. Is there another pin type thing holding it together? I've looked around and it seems that this pin I took out was the only thing holding everything inside. It came out pretty easily.
I am just doing this to "play" I have no intention to rebuild the thing as they are pretty cheap, I want to look at the seals and bore to see if I am right that the last time I did the pump and dump bleed, I screwed up letting the pedal go all the way down. Thanks.
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1985 300D 197K - Semi-Daily Driver Diesel 1998 Volvo V70 AWD 226K - Daily Driver 2 1998 Volvo S70 140K - Wife's DD 2003 GMC Sonoma ZR2 Option - Rusty Truck THE BABY 1958 220S Sedan 66K All original, never restored and never will be. |
#2
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Next time you can put a two by four piece of wood under the pedal to keep that from accidentally happening.... might stack them to be sure...
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#3
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Exactly what I do, and it works great. I measure the max pedal travel before I touch anything and cut a stick of wood to prevent the pedal from being pushed further than that. I tape the stick to the pedal and begin the work. Then when I ask my sister to pump the pedal, I don't worry about her overstroking the master.
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'84 190D 2.2 5MT (Red/Palomino) Current car. Love it! '85 190D 2.2 Auto *Cali* (Blue/Blue) *sold* http://badges.fuelly.com/images/sig-us/302601.png http://i959.photobucket.com/albums/a...0/sideview.png |
#4
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Thanks guys, but I still want to take apart the old MC. I'm thinking to use some gun cleaning tools to clean out the bore, replace the seals with a seal kit, and place it on the shelf for a spare. I forgot about the block of wood trick when I did the rears last summer, mainly because I've been using a Motive bleeder for years. I had it out on loan when I did the rear brakes and just had a senior moment when having my wife pump for me.
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1985 300D 197K - Semi-Daily Driver Diesel 1998 Volvo V70 AWD 226K - Daily Driver 2 1998 Volvo S70 140K - Wife's DD 2003 GMC Sonoma ZR2 Option - Rusty Truck THE BABY 1958 220S Sedan 66K All original, never restored and never will be. |
#5
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We don't have the answer... but we keep bumping it up where someone that does ought to see it..... if you want I can probably make up something which will sound good.... but still won't be correct... three people on this forum claim I do that all the time....
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1980 240d , chain elongation, cam marks reference: http://www.peachparts.com/shopforum/showthread.php?threadid=10414 http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html evap fin cleaning: http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator A/C thread http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html |
#6
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I never thought of the block of wood to keep the piston from travelling into the grunge zone. One shouldn't have to do this on a new MC. I have silicone fluid in both my 300D's, so corrosion is no longer a concern. I recently removed an MC from my 65 Newport after 20 years using silicone and found it pristine inside. The MC still worked fine, I was switching from single pot to a safer dual-reservoir MC.
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#7
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Quote:
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1985 300D 197K - Semi-Daily Driver Diesel 1998 Volvo V70 AWD 226K - Daily Driver 2 1998 Volvo S70 140K - Wife's DD 2003 GMC Sonoma ZR2 Option - Rusty Truck THE BABY 1958 220S Sedan 66K All original, never restored and never will be. |
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