Ollie Posted October 25, 2021 Report Share Posted October 25, 2021 Just discovered an anomaly in the fitting of my M20J gear Actuator. See 4 pics/ Looks like a manufacturing defect where the bolt and the hold do not line up and the bracket upside down and is rubbing on the fuel lines. Can anybody help out with some correct information here? Is this the same in your M20J? Thank you so much for any help or advice. (David, Brisbane - Australia). Quote Link to comment Share on other sites More sharing options...
PT20J Posted October 26, 2021 Report Share Posted October 26, 2021 One thing I notice is that everything under there looks 30 years old EXCEPT the piece the gear motor is attached to. Has it been replaced? With that much chafing on the actuator, I’d definitely take a close look at the tubing integrity. Skip 1 Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted October 26, 2021 Report Share Posted October 26, 2021 (edited) Mine was like that when I bought it. Same scrapes and everything. The fitting that the actuator is hooked to is upside down. Mine got that way during a gear up repair. Check the machined part, it has a curved corner, it should fit into the inside radius of the sheet metal. If it is upside down, there will be a square corner by the radius. Edited October 26, 2021 by N201MKTurbo 5 Quote Link to comment Share on other sites More sharing options...
Ollie Posted October 26, 2021 Author Report Share Posted October 26, 2021 Yes. Mine is back from a 2020 gear-up landing. The overhauled actuator in the pic (AUD $17,000) has only done 56hrs and failed. The engineer installed this overhauled one because the old one was damaged during the gear-up. I assume he just reversed the procedure when he removed the one damaged in the GU and did not notice the anomaly. I am waiting for a friend to look at his to see how that it fitted. Will report back. 1 Quote Link to comment Share on other sites More sharing options...
ArtVandelay Posted October 26, 2021 Report Share Posted October 26, 2021 Mine was like that when I bought it. Same scrapes and everything. The fitting that the actuator is hooked to is upside down. Mine got that way during a gear up repair. Check the machined part, it has a curved corner, it should fit into the inside radius of the sheet metal. If it is upside down, there will be a square corner by the radius.Are you talking about #5 in this parts diagram? Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted October 26, 2021 Report Share Posted October 26, 2021 Yes. Quote Link to comment Share on other sites More sharing options...
A64Pilot Posted October 26, 2021 Report Share Posted October 26, 2021 You guys have good eyes Quote Link to comment Share on other sites More sharing options...
PT20J Posted October 26, 2021 Report Share Posted October 26, 2021 It's a bad design practice to make a part symmetrical so that it can be installed multiple ways if only one way is correct. Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted October 26, 2021 Report Share Posted October 26, 2021 (edited) 4 minutes ago, PT20J said: It's a bad design practice to make a part symmetrical so that it can be installed multiple ways if only one way is correct. Its Poka is not Yoke. Edited October 26, 2021 by N201MKTurbo 1 Quote Link to comment Share on other sites More sharing options...
Hank Posted October 27, 2021 Report Share Posted October 27, 2021 5 hours ago, N201MKTurbo said: Its Poka is not Yoke. Although it would seem obvious to put the rounded corner of the plate into the rounded recess, rather than putting g the square corner I to the rounded recess and leaving the rounded corner hanging out . . . Or is that just the Mechanical Engineer in me? Quote Link to comment Share on other sites More sharing options...
1001001 Posted October 27, 2021 Report Share Posted October 27, 2021 It looks like someone smeared grease on the actuator shaft (and maybe the fuel tubing) *knowing* that they were rubbing together? Wow. Quote Link to comment Share on other sites More sharing options...
Yetti Posted October 27, 2021 Report Share Posted October 27, 2021 The holes does line up with the actuator bolt. You are going to need a socket with the sides of the socket ground down to get it to work. Quote Link to comment Share on other sites More sharing options...
Ollie Posted October 27, 2021 Author Report Share Posted October 27, 2021 The orange stuff on the shaft is chalk. The engineer used this to confirm the shaft is actually rubbing on the fuel lines. it looks like the whole assembly has to be de-riveted to rectify this problem. Oh well, it's only mooney (er, I mean money). Thank you everyone for your advice. Quote Link to comment Share on other sites More sharing options...
1001001 Posted October 27, 2021 Report Share Posted October 27, 2021 36 minutes ago, Ollie said: The orange stuff on the shaft is chalk. The engineer used this to confirm the shaft is actually rubbing on the fuel lines. it looks like the whole assembly has to be de-riveted to rectify this problem. Oh well, it's only mooney (er, I mean money). Thank you everyone for your advice. Ah, got it. Quote Link to comment Share on other sites More sharing options...
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