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Old 04-11-2021, 10:37 PM   #1
dorvedahl47pu
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Default 40 1 ton Brake Master Cylinder Bypass Port

Good evening,

I'm rebuilding the master cylinder for my 40 1 ton. It turns out the bypass port is plugged/rusted shut. Does anyone have an idea of what the diameter of that port is supposed to be? I figure I will have to drill it out.... Thanks.
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Old 04-11-2021, 11:32 PM   #2
GB SISSON
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Default Re: 40 1 ton Brake Master Cylinder Bypass Port

Master cyls and wheel cyls have gotten so cheap these days, I just buy new. I get them at NAPA. Gonna be like 65 bucks. I'm an old guy and been in some hellatious near misses, that's all.
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Old 04-12-2021, 08:21 AM   #3
51504bat
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Default Re: 40 1 ton Brake Master Cylinder Bypass Port

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Not positive but if the 1 ton M/C is the same as a 1 1/2 ton M/C a couple of years ago I bought a brand new Wagner M/C made in USA from Joe's Antique Auto in Uxbridge, MA.


If you're interested I have a couple of old core M/C housings you can have for the cost of postage. PM if interested.
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Last edited by 51504bat; 04-12-2021 at 08:22 AM. Reason: added info
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