69F100 Master Cylinder

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bart
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69F100 Master Cylinder

Post by bart »

Hi, I am in need of a new master cylinder. What I find is that there seems to be a difference in manual brake master cylinders for 2WD or 4WD applications (Ebay, LMC, JCW). Exterior of the two types looks exactly the same. what is the difference ? Does it have to with the residual check valves ?
Thanks / Bart.
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71PA_Highboy
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Re: 69F100 Master Cylinder

Post by 71PA_Highboy »

The residual valve, the diameter of the plunger in the master cylinder, the fitting size and the volume of the individual reservoirs.
Got Ford?
2 EarlyBroncos (68,69)
2 Classic Mustangs (69,70)
1 F250 4x4 (71) - OB - 360, NP435, D24, HPD60 4.10, D60,
1 94 Ranger, 2.3, 5spd
1 Lincoln Mark VIII
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bart
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Re: 69F100 Master Cylinder

Post by bart »

OK Thanks for that, so quite a big difference between them. Let's hope I ordered the correct one !
ultraranger
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Re: 69F100 Master Cylinder

Post by ultraranger »

In their original installation from the factory, a MC port or ports going to the drum brake circuits would have had an RPV in the port (just under the inverted flare seat).
If you by a direct replacement MC from the parts stores today, chances are very great that there won't be an RPV installed in the MC.
Steve

1969 SWB F100 Ranger. 240-6, C-4, 9" N-case 31-spline Traction-Lok w/3.50 gears.

1968 Mustang. My high school car. Owned since 1982.

2003 Azure Blue Mustang Mach1.
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bart
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Re: 69F100 Master Cylinder

Post by bart »

Do I need to install RPV if missing from the replacement MC ? Wheel cylinders are approx. 10 years old.

I ordered following on ebay: Brake Master Cylinder-PG Plus Professional Grade New fits 68-75 Ford F-250
Raybestos MC39468

Interchange Part Number: M83579, 130.65012, 131.65012, MC79775, 12260
http://www.ebay.nl/itm/132162363487?ul_noapp=true

As far as I can find, MC for F250 and F100 for 68-71 are identical. However the listing does not mention 2WD or 4WD.
Would that be OK for my 69F100RWD ?
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