M20F-1968 Posted July 5, 2020 Report Posted July 5, 2020 I need to purchase a new hydraulic flap cable. I just went through annual and put the belly pan back on. I'm trying not to take it off again. Does anyone happen to know the diameter of piano wire that I would need to order to replace only the inner wire. I plan to leave the housing alone. Are there any updated products that I might want to know about, such as potentially Teflon coated piano wire? John Breda
RLCarter Posted July 5, 2020 Report Posted July 5, 2020 I don't remember the diameter but when I replaced mine I got measurements at the lever instead of pulling the belly off untill needed
Culver LFA Posted July 5, 2020 Report Posted July 5, 2020 John, I just tried to measure mine at the flap release lever but it's too tight to get in there. Appears to be the same size as the parking brake cable piano wire which measures 0.0625"
M20F-1968 Posted July 5, 2020 Author Report Posted July 5, 2020 Thanks. I'll be at the hangar later this week and will try to get a measurement as well. John Breda
Nukemzzz Posted July 8, 2020 Report Posted July 8, 2020 This just happened to me a few months ago. You’ll have to disconnect the wire clamps from behind the panel and pull out the lever to fix this anyway. Might as well do it now to take the measurement. I bought the next largest size from McMaster and it’s quite snug and I didn’t get the polished version since it wasn’t avail in this size. I would have been better off a size under and polished I think. Let me see if I can find the exact wire I used.
Nukemzzz Posted July 8, 2020 Report Posted July 8, 2020 Spring-Back Multipurpose 304 Stainless Steel Wire, 1/4 lb. Coil, Matte, 0.055" Diameter $12.05.
Nukemzzz Posted July 8, 2020 Report Posted July 8, 2020 I only went with Matte instead of polished because it was the closest to my measured size, however I think it ended up being 0.005“ above the original wire. It worked, but it’s a little harder to move now. Maybe it will break in.
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