For anyone that has installed a TruTrak AP, you know there are NO instructions, only a few drawings and the drawings don't call out how the washers are to be used on the pushrods that attach the bellcrank to the servo arm. I put a call in to TT this afternoon to ask some questions and I asked them about how the washers are supposed to be configured.
The large OD washer is designed to go on out OUTSIDE of the rod-end bearing. The theory being that if the bearing disintegrated, the washer would capture it and keep it from falling off. (He also said they've never had a single failure.)
Here is a picture of a correctly assembled roll servo, courtesy of Dave Parsons.
And here is a pitch servo installation, ala DP again.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I've suggested that they update their drawings to reflect this because I found quite a few installations that were incorrect in my searching for the right way to do it.
The large OD washer is designed to go on out OUTSIDE of the rod-end bearing. The theory being that if the bearing disintegrated, the washer would capture it and keep it from falling off. (He also said they've never had a single failure.)
Here is a picture of a correctly assembled roll servo, courtesy of Dave Parsons.
![IMG_1739.jpg](/community/proxy.php?image=http%3A%2F%2Fwww.dualrudder.com%2Falbums%2Frv7%2Fimages%2FIMG_1739.jpg&hash=d76cf2b615b07cfdee2eb2216734ba62)
And here is a pitch servo installation, ala DP again.
![IMG_1488.jpg](/community/proxy.php?image=http%3A%2F%2Fwww.dualrudder.com%2Falbums%2Frv7%2Fimages%2FIMG_1488.jpg&hash=f7fb4da7346757389c5579ff996539ab)
I've suggested that they update their drawings to reflect this because I found quite a few installations that were incorrect in my searching for the right way to do it.
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