Lubrication hole for flap torque tube

[DBeaulieu]

This is for the bearing (tube) supporting the outboard end of the torque tube. Drill for lubrication or not? Can't recall seeing it drilled in the plans. On some pics I see it drilled. Seems like I can easily lubricate that bearing by simply drizzling LPS or Corrosion-X on either side of the bearing and let wicking action do it's thing. All thoughts considered and appreciated!

Dave (from Maine)

 

[noema]

I asked myself the same question and decided to lubricate the tube from the outside. When the horizontal stabs are off the fuselage the torque tubes can be pushed in- and out-board quite a bit which allows for good lubrication. I also have an access port in the fabric of the first section of the stab to get reach the lubrication point from both sides.

Similarly, how do lubricate the pedal hinge tubes? Lubrication holes or do you disassemble them (which would require small holes in the fuselage fabric to push them out)?

 

[Battson]

For the pedals you definitely want to lube without disassembly. Holes work fine. I lube once a year (100 hrs flying roughly) and think seems about right.

 

[Dpearson]

I drilled a #40 hole in the inboard and outboard flap "Bearing" tubes. For the inboard tube I also drilled a 1/2" hole in the bottom skin for access to the little hole in the tube, which I will close out with a plastic hole plug.
​
​

 

[DBeaulieu]

Dpearson Good idea!

 

[DBeaulieu]

Appreciate all the thread replies. Going to the hangar to work today and guess I'll drill a few holes

 

[Bcone1381]

The oiler design plays a roll. Find one or fabricate one with a rubber tip so when it engages the oil hole a seal is formed so you can inject your favorite lubricant under pressure into the hole from under the wing.

the photos are of my oiler contraption. I force The rubber grommet to seal the injection area with pressure applied by the short steel tube onto the grommet.