Gary0747 Posted May 27, 2018 Report Share Posted May 27, 2018 (edited) Had never noticed this before but the rigid end piece on the servo end of my mixture cable seems to have separated? Not sure how it is supposed to attach? Maybe time for a new one. Appreciate any advice Edited May 28, 2018 by Gary0747 Added Photo Quote Link to comment Share on other sites More sharing options...
Bob_Belville Posted May 28, 2018 Report Share Posted May 28, 2018 Engine cables ought to be replaced about as often as engines are overhauled according to McFarlane. https://www.mcfarlaneaviation.com/section/services/custom-engine-controls/ Quote Link to comment Share on other sites More sharing options...
takair Posted May 28, 2018 Report Share Posted May 28, 2018 57 minutes ago, Gary0747 said: Had never noticed this before but the rigid end piece on the servo end of my mixture cable seems to have separated? Not sure how it is supposed to attach? Maybe time for a new one. Appreciate any advice Picture would help, but I suspect this is the point where there is a swaged bulb that acts as a ball joint. It come with a rubber part over it that is for vibration dampening. The rubber part fails relatively quickly and the bulb wears until it separates. While I have not seen this cause the cable to fail, it can cause kinking and rough operation and I suspect accelerated cable wear. You might be able to get it back together and get longer life, especially if the rubber part is intact, but I suspect your IA would recommend replacement. Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted May 28, 2018 Report Share Posted May 28, 2018 Shove it back in to the socket and put some tightly wrapped 0.020 lock wire around it and the socket and it will be good for another 50 years. 1 Quote Link to comment Share on other sites More sharing options...
Gary0747 Posted May 28, 2018 Author Report Share Posted May 28, 2018 22 minutes ago, takair said: Picture would help, but I suspect this is the point where there is a swaged bulb that acts as a ball joint. It come with a rubber part over it that is for vibration dampening. The rubber part fails relatively quickly and the bulb wears until it separates. While I have not seen this cause the cable to fail, it can cause kinking and rough operation and I suspect accelerated cable wear. You might be able to get it back together and get longer life, especially if the rubber part is intact, but I suspect your IA would recommend replacement. I added a photo to my original post. Quote Link to comment Share on other sites More sharing options...
cnoe Posted May 28, 2018 Report Share Posted May 28, 2018 That happens when the end rod gets bent slightly. It binds inside the other tube and when you push the mixture knob forward it pops the joint apart. It can be repaired by carefully straightening the rod then reinserting the tube into its socket. I’ve seen the safety wire trick but if it’s binding it will just pop out again. If you get it working well again use a short piece of heavy duty shrink sleeve (the kind with meltable adhesive sealant inside) to keep the joint both secure and sealed from the elements. Sent from my iPad using Tapatalk Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted May 28, 2018 Report Share Posted May 28, 2018 Yep, that's it. Wrap the lockwire around the shaft, twist if tight, twist if for a bit and twist it around the fixed part on the conduit. That will hold it together forever. I did it to my prop cable. I'll be out at the hangar tomorrow I'll see if I can get a picture. Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted May 28, 2018 Report Share Posted May 28, 2018 Cnoe is correct. It happens because you have the mixture rigged so it hits the end of travel at the servo before the knob is all he way in. Somebody tried to make it richer than max by pushing he knob in to the stop. This pushes it apart. My old partner, thought that all levers needed you be pushed to the stops no matter how much force it took. Quote Link to comment Share on other sites More sharing options...
Guest Posted May 28, 2018 Report Share Posted May 28, 2018 Or the ball and socket ends on the cable sheath are just old and worn out and have fallen apart. Clarence Quote Link to comment Share on other sites More sharing options...
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