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Master Brake cylinder rebuild kit

Need to rebuild master cylinders on a K35 serial 6027
Has Cleveland brakes but original master cylinders.
I would like to know which cylinders were used on my aircraft so I can order the kit . I can’t see the part number without disassembling . Also I need a source for the kit , I called performance aero and they do not sell master rebuild kits .
Thanks
Mike

Model: Bonanza K35
Aircraft Serial Number: 6027
Posted 9/5/2023 - 5 months ago
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Michael, is it possible for you to put an eye on those master cylinders and get a part number off them? I have had luck with a smart phone and flash in areas where a flashlight and mirror wouldn’t do the job. On older aircraft like yours (mine is older), parts can be difficult. The O rings are easy, but there is usually a check valve type seal that may or may not be available. In my own case, I ended up replacing my 50+ year old master cylinders with later model master cylinders. This cost more, but I had one fail completely on a cross wind landing and things got very exciting before I got the airplane under control and stopped. Attached photo is one of the master cylinders that came out of my 1956 G35. It had no discernible data plate or ID. How could I source parts?

IMG_5654.jpeg - 1.9 MB

Posted 9/6/2023 - 5 months ago
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Attached is IPB for Goodyear master cylinder. There were also Firestone master cylinders used on some aircraft. Tough to tell which is which without a data plate on the part!

IMG_5657.jpeg - 2.1 MB

Posted 9/7/2023 - 5 months ago
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Thank you Steve
I will try the phone trick .
I’m afraid I may be in the same situation you were with unmarked masters.
Thanks again for your response
Mike

Posted 9/8/2023 - 5 months ago
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In my case it was item #16, P/N 47G-045. Impossible to find and the heart of the master cylinder. After that scare on the X-wind landing, I quickly pulled out my wallet and bought new master cylinders. We could argue approvals and legality, but I have a tough time believing that any reasonable FSD inspector would have a problem with obvious safety upgrades.

Posted 9/8/2023 - 5 months ago
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Master Brake cylinder rebuild kit