Wing Removal
Moderators: Rick, Lance Murray
- smoss
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Re: Wing Removal
Rick, did you end up changing the whole roller guide assembly or the individual rollers?
Steve
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Re: Wing Removal
I haven't done anything yet. My annual is due in December and I'm trying to decide what to do then. If I decide to add the access holes, I may take it down to Glenn at KRUQ to get that done first, but I'm not sure if I need them. Yet.smoss wrote:Rick, did you end up changing the whole roller guide assembly or the individual rollers?
Either way, I think you just replace the rollers, not the entire assembly. It seems like you would definitely have to remove the wing and pushrod to replace the entire assembly, since the rods go through the housing for the rollers. Here is a picture of an aileron pushrod guide with the three rollers - there are three of these in each wing:
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Re: Wing Removal
Here are the photos: Previously replaced roller and cracked original roller in left wing Axle rivet ground off using Dremel tool Cracked roller removed New roller installed with cap screw and nyloc nut New roller installed with caps screw and nyloc nut Torque sealSteve wrote:Rick:
You may not have to remove the wing. I have replaced 3 of these rollers in my 2001, 2 of which were in the wing. See:
viewtopic.php?f=8&t=4260&p=55373&hilit=Roller#p55373
Unfortunately, the photos seem to have vanished from Photobucket, but I still have them on my computer. I'd be happy to send them to you or post here. It took me about 2 hours to replace each roller in the wing. The one in the rear of the fuselage took less time. You don't have to remove the pushrod. It isn't a fun job, but takes a lot less time than pulling the wing.
Steve
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Re: Wing Removal
Thanks for the pictures, Steve. I will show this to my A&P and see if we can't use this method to fix mine.
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Re: Wing Removal
Does anyone periodically lubricate the pushrod roller bearings? My mechanic is suggesting I do by spraying them with some LPS1, but I can find no reference for or against it in the AMM. Same also for the flap pivot pins.
Steve
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Re: Wing Removal
Many years ago, Peter Maurer told me that it was exactly the wrong thing to do to lubricate these roller bearings.
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Re: Wing Removal
The bearings are lifetime lubricated. Plus, they are not called out on the airframe lubrication checklist in the Maintenance Manual.
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Re: Wing Removal
Can you reach and rotate each bearing? Just like those two sealed bearings on the NLG of my DA-20, I could rotate them by hand and feel any "grittiness" as they moved. When I replaced my wheel bearings - the new bearings were "smooth as silk."
For those rollers, you could just move the stick back and forth while watching the operation at each roller. If they rotate then likely life is likely good. If the control rod moves but the roller does not then that is a good reason to replace. If the control rod never touches that roller then it is somewhat a mute point and I personally would not expend sweat/$$ going after it. I doubt if things will bind up and/or damage the control rod, but friction builds at each point where contact between two surfaces exist. IMO, those are the rollers to focus on.
For those rollers, you could just move the stick back and forth while watching the operation at each roller. If they rotate then likely life is likely good. If the control rod moves but the roller does not then that is a good reason to replace. If the control rod never touches that roller then it is somewhat a mute point and I personally would not expend sweat/$$ going after it. I doubt if things will bind up and/or damage the control rod, but friction builds at each point where contact between two surfaces exist. IMO, those are the rollers to focus on.
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Re: Wing Removal
Some of them can be replaced without wing removal or cutting access holes:
viewtopic.php?f=8&t=6629&hilit=roller
There are some assemblies that are not accessible via inspection holes or in the fuselage. Luckily, the ones needing replacement on my aircraft were (reasonably) accessible. Working inside the wing is a pain, and the labor time might cost more than putting in access holes (there is an SB for doing this).
Steve
viewtopic.php?f=8&t=6629&hilit=roller
There are some assemblies that are not accessible via inspection holes or in the fuselage. Luckily, the ones needing replacement on my aircraft were (reasonably) accessible. Working inside the wing is a pain, and the labor time might cost more than putting in access holes (there is an SB for doing this).
Steve