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 Master cylinder 
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Speed Limit Obeyer
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Joined: Tue May 26, 2009 11:33 pm
Posts: 88
Location: Edmonton AB
Post Master cylinder
Wouldn't you know it,I ask for a change on the site and now I am asking for help.I moved my 81 from my old house to my new place about two months ago and have not moved it since until I pulled it out of the garage to do some work inside.Low and behold big pile of brake fluid,turns out one of the sensors on the bottom of the master cylinder is peeing fluid.Now here is the question is there any easy way to pull those sensors without pulling the master cylinder and if not what is the best way to pull off the master cylinder?As I have read many repair manuals and online stuff and most of it contradicts itself.So I come back to the experts.

Kurt :?


Thu Jan 19, 2012 9:03 pm
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Speed Limit Obeyer
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Joined: Mon Feb 25, 2008 12:45 pm
Posts: 491
Location: El Cajon CA
Post Re: Master cylinder
I replaced both my brake pressure switches without removing the brake master. Just need a short wrench to loosen it, then it comes out by hand. Same for going back in.

Tight fit, but it can be done.

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Thu Jan 19, 2012 9:12 pm
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Speed Limit Obeyer
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Joined: Tue May 26, 2009 11:33 pm
Posts: 88
Location: Edmonton AB
Post Re: Master cylinder
Can you remember what size of wrench is needed before I start jamming the wrong ones in?

Kurt


Wed Feb 01, 2012 7:09 pm
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Joined: Mon Jan 07, 2008 8:43 pm
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Location: Sunny San Diego
Post Re: Master cylinder
I just tried to put a 7/8" open end wrench on the MC I replaced and it didn't fit, it will be the next size up in mm (23mm?)

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1981 Porsche 928 "Euro" 4.5 Litre Auto Gunsmoke Metallic Flat - Black Interrior
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Wed Feb 01, 2012 7:46 pm
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Speed Limit Obeyer
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Joined: Tue May 26, 2009 11:33 pm
Posts: 88
Location: Edmonton AB
Post Re: Master cylinder
Got it off finally,the size is 24mm and found the perfect wrench size in my miscellaneous hand tool box,it was an old 24mm pot iron wrench from one of my old Yamaha RZ 500 tool kits.Now I am just going to plug it for now until I can get new a new sensor and it's not -15 in the garage. The size of bolt I'll need looks to be a m10 with a fine thread,I'll post the findings after it's done and maybe with some pictures.


Kurt


Thu Feb 09, 2012 6:34 pm
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