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Author Topic: 1971 Disc/Drum Master Cylinder out of production?  (Read 838 times)

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Offline clsecmbt

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1971 Disc/Drum Master Cylinder out of production?
« on: November 15, 2019, 05:02:34 PM »
I've looked all over to find a replacement brake master cylinder for our disc/drum 1971 Runabout. Is there an interchage with another combination or will I have to just try and make something fit?
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Offline LongTimeFordMan

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #1 on: November 15, 2019, 09:43:37 PM »
I ran into tbe same problem with my 73 wagon but fortunately my master cylender id still i  good condition

I did score a rebuildable core and am going to investigat finding a rebuilt kit that will fit.

I assume that if you can find a rebuild kit with the same sized rubber parts you could rebjild the one you have.
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Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline nnn0wqk

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #2 on: November 15, 2019, 10:01:12 PM »
And if all else fails there are a couple of place that will sleeve your master cylinder for you. It is not a cheep way to repair but I understand it is a stainless steel sleeve so should never give an issue. Last time I looked into it was around $200.00 for that sort of repair.
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Offline 71pintoracer

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #3 on: November 16, 2019, 07:37:40 PM »
Rock Auto shows them for $73. l have a used one from the Pintoracer that was working perfectly, it was a new (not reman) Raybestos, maybe 4 years old. $30 plus shipping. Also have the complete disc brake set-up for sale (possibly without the rotors, another member inquired about them but has not commited to buy.)
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If you don't have time to do it right, when will you have time to do it over?

Offline clsecmbt

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #4 on: November 17, 2019, 10:39:15 AM »
Do you know what the port sizes are on that M/C you have? The RAYBESTOS MC36319 is listed on RockAuto, but when I try to buy it's actually out of stock. Go figure. I see there's a 1/2-20 3/8-24 and a 1/2-20 9/16-18 for port size combos. Not a total dealbreaker if we have to change some fittings.
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Offline 71pintoracer

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #5 on: November 17, 2019, 04:29:38 PM »
Mine has a step down adapter in the rear port so l'm guessing it has the 9/16-18. So the 74 up will probably work
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Offline LongTimeFordMan

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #6 on: November 18, 2019, 10:14:02 AM »
Later models should work as long as the bore and piston sizes are the same and you can find adapters for the ports

Alzo while we are discussing brakes..

Has a yone experienced the rear brakes on a disk drum wagon locking up prematurely during hard  braking.

Mine seem to do that a lot even on dry roads.

I also have organis pads on the front and 14" 205 tires all aroind.

I have been contemplaring getting a adjustable proportioning valve for the rear
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Offline Wittsend

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Re: 1971 Disc/Drum Master Cylinder out of production?
« Reply #7 on: November 18, 2019, 11:45:02 AM »
YES!  I thought it might have been related to my using a drum to drum full 8" rear end swap and something having a minor difference.  With the added weight of the 2.3/turbo it seems to make the car nose heavy but I still feel there is just a natural inclination of the rear to get light during heavy braking and cause the lock up.
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