Glen Davis Posted January 7 Report Posted January 7 Is this normal play or should there be some kind of grommet to keep the Rod from moving so much? View my video at https://glendavis.smugmug.com/Pushrod/i-zXZBnKf
EricJ Posted January 7 Report Posted January 7 That's normal. Just make sure the grommet is in one piece and the tube isn't getting chafed/worn. The grease there helps.
varlajo Posted January 7 Report Posted January 7 Totally normal. The previous owner of my plane protected the rod with some speed tape, but I don't think this it is necessary. There are no marks or indentations in the speed tape at all after 7 years.
PT20J Posted January 7 Report Posted January 7 26 minutes ago, varlajo said: Totally normal. The previous owner of my plane protected the rod with some speed tape, but I don't think this it is necessary. There are no marks or indentations in the speed tape at all after 7 years. I don't know about previous models, but according to the IPC, Mooney put teflon tape on the M20Js from S/N 24-0001 through 24-0810 and heat shrink tubing thereafter. The OP's appears to have the heat shrink. On mine, the oil from the grease allowed the heat shrink to slide out of position. Cleaning the tube with solvent, moving the tubing back into place and hitting it with a heat gun tightened it up. The additional protection may not be necessary, but the grommet is nylon which is a pretty hard material rubbing on the relatively soft aluminum torque tube, so it might be a good idea.
N201MKTurbo Posted January 7 Report Posted January 7 Instead of wiggling it back and forth, operate the controls and see what it does.
Alan Maurer Posted January 7 Report Posted January 7 Where is that tube that is shaking and what does it do??? Alan
PT20J Posted January 7 Report Posted January 7 1 hour ago, Alan Maurer said: Where is that tube that is shaking and what does it do??? Alan Trim torque tube.
Hank Posted January 7 Report Posted January 7 1 hour ago, Alan Maurer said: Where is that tube that is shaking and what does it do??? Alan This thread title is click bait! My first thought was "that sounds like a personal problem." There's something to be said for grabbing your rod and shaking it . . . .
Flyler Posted January 8 Report Posted January 8 Mine is the same. Creeps me out. A&P said its normal, but agrees is creepy.
Vance Harral Posted January 8 Report Posted January 8 7 hours ago, varlajo said: The previous owner of my plane protected the rod with some speed tape, but I don't think this it is necessary. Disagree, at least for some of the M20 models. At the first annual after we bought our F model in 2004, the IA found a groove worn in the trim tube where it passes through that grommet, and we had to repair it. He applied heat shrink to the repaired tube where it passes through the grommet. We keep the area greased, but we've replaced the heat shrink at least once in the last 20 years, when it showed signs of wearing through. 2
EricJ Posted January 8 Report Posted January 8 Having tape or heat shrink, or something, on the tube is very good for detecting witness marks of abrasion before it damages the tube. It is often a good idea to inspect tubes where they pass through formers/ribs/spares/etc., to see whether there is any bad abrasion or rubbing happening. The one in the vid doesn't look bad.
PT20J Posted January 8 Report Posted January 8 8 minutes ago, N201MKTurbo said: Actually, I think it is either the rudder or elevator tube before it gets to the tail cone. Naw, they don’t pass through grommets and are not in the center of the fuselage. You can see the rudder and elevator push pull tubes in the video on either side of the central trim torque tube.
Mcstealth Posted January 8 Report Posted January 8 2 hours ago, Schllc said: Good lord! Get a room already! I was wondering when the first comment would show. : 1
Justin Schmidt Posted January 8 Report Posted January 8 2 hours ago, Hank said: This thread title is click bait! My first thought was "that sounds like a personal problem." There's something to be said for grabbing your rod and shaking it . . . . At least I'm not the only one 2
N201MKTurbo Posted January 8 Report Posted January 8 58 minutes ago, PT20J said: Naw, they don’t pass through grommets and are not in the center of the fuselage. You can see the rudder and elevator push pull tubes in the video on either side of the central trim torque tube. Ya see, I re-watched it and deleted my comment, but you were so fast you caught it before I could fix my mistake…. 1
Ragsf15e Posted January 8 Report Posted January 8 2 hours ago, Vance Harral said: Disagree, at least for some of the M20 models. At the first annual after we bought our F model in 2004, the IA found a groove worn in the trim tube where it passes through that grommet, and we had to repair it. He applied heat shrink to the repaired tube where it passes through the grommet. We keep the area greased, but we've replaced the heat shrink at least once in the last 20 years, when it showed signs of wearing through. I had same experience with the trim torque tube. Got grooved where it passes through a bulkhead. Had to get a new one through Mooney. Wasn’t cheap, took a couple months. I would find a way to protect it. Some of the pass through holes have sacrificial “plastic” blocks for it to rub on.
cliffy Posted January 8 Report Posted January 8 IIRC IF the tube OD is worn the limit is 10% of the tube wall thickness. After that its junk.
N201MKTurbo Posted January 8 Report Posted January 8 The plastic won’t wear the tube, but the grease on the tube will collect dust. The dust, dirt and sand that gets embedded in the grease will wear the tube. At every annual, it is better to wipe off the old grease and put on fresh grease. It only takes an extra minute. 1 1
00-Negative Posted January 8 Report Posted January 8 2 hours ago, N201MKTurbo said: The plastic won’t wear the tube, but the grease on the tube will collect dust. The dust, dirt and sand that gets embedded in the grease will wear the tube. At every annual, it is better to wipe off the old grease and put on fresh grease. It only takes an extra minute. Aeroshell 7 or Aeroshell 33?
PT20J Posted January 8 Report Posted January 8 1 hour ago, 00-Negative said: Aeroshell 7 or Aeroshell 33? I use Aeroshell 7, same as aileron guide blocks and trim screws (fore and aft).
Yetti Posted January 8 Report Posted January 8 Same thing on my F. We used some thin plastic film with two tywraps for protection 1
MikeOH Posted January 9 Report Posted January 9 23 hours ago, Justin Schmidt said: At least I'm not the only one Nope. I had to fight to keep from typing
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