Horizontal stabs are stuck, can't budge them for removal

[mike mcs repair]

I don't have a part number handy, but a single or double bolt steel clamp for the correct diameter tube. Drill a small hole and tig weld a nut, install a grease fitting. Then install the clamp around the tube aligning with the oil hole. Would be a easy job.

Sharp

good idea!
probably 7/8 which is a 7p

 

[RAC cubs]

Crud, now I need the rear inner tube for the Stabilizers. I have a new front tube but the old back one is shot...
I looked all over o the univair site and could not find it listed...

Call univair ask for Rick he will know

 

[aktango58]

or Stoddards....

 

[Alex Clark]

After a high speed parts runs...Found one (rear inner tube) in Soldotna... YEAH......

 

[Dave Calkins]

Glad you got it done Alex. This will be a good lesson for others who will see that this is not an impossible task.

Hacksaw off flush, then cut slot in inner tube long way with hacksaw blade since Plane is covered

Normal way is heat but you have fabric on

Once the 'slot' is cut, it is pretty simple to collapse the rear inner tube ("liner" tube, per Piper nomenclature) into itself and remove it. You will likely need to replace the rusty "liner" by this stage anyway.

This is usually the quickest and easiest method, though seemingly, the most extreme measure, but will work every time, and you wont need to damage the fuselage with beating on the rusty tube or take time for KROIL< OIL< BLASTER, or a torch, nor will you damage the stabilizer inboard rib by
"rotating the stabilizer" as a lever on the rusty rear tube. (been there!)

I think much of "Sharp"'s idea to weld a grease zerk onto a clamp to go over the rear fuselage mount. I'd think you'd need to epoxy it in place as well to alleviate chances of grease leakage where the clamp lays.

DAVE

 

[tempdoug]

How do you weld a zerc without melting it?

 

[mike mcs repair]

How do you weld a zerc without melting it?

you are welding a nut on and screwing the zerk into it...

 

[rcsimpson]

I think that's part of Red Green's advice from his book in the chapter about "So you want to build your own airplane" . . .
http://www.youtube.com/watch?v=HioV-vQvqio

ya.... cause there is some FAA rule somewhere about drinking and working on planes... you can't even supervise someone that's sober if you have been..or visversa... anyone got the link?

 

[tempdoug]

Mike ive seen zercs welded to tubes, can a tig welder work with that fine of stuff? Ive heard they can weld a crack in a pop can? Never seen it done though.

 

[mike mcs repair]

Mike ive seen zercs welded to tubes, can a tig welder work with that fine of stuff? Ive heard they can weld a crack in a pop can? Never seen it done though.

the spring will probably not work anymore to hold ball if you weld it.....

 

[cubdriver2]

the spring will probably not work anymore to hold ball if you weld it.....

Wouldn't matter if check valve doesen't work no real pressure pushing back it's just a portal for the grease gun to rest on.

Glenn

 

[Dave Calkins]

Use a little common sense ...P..lease

I think we all understand it'd be a welded nut or threaded boss for the zerk to thread into.

 

[Alex Clark]

I tried some two ton epoxy to hold the nut in place. I should know if it worked by tomorrow.

 

[mike mcs repair]

I tried some two ton epoxy to hold the nut in place. I should know if it worked by tomorrow.

probably not.....
he meant under the clamp with the nut welded to the clamp.....

 

[cubdriver2]

I tried some two ton epoxy to hold the nut in place. I should know if it worked by tomorrow.

Make sure you recompute you weight & balance ;-) :lol:

Glenn

 

[Dave Calkins]

That's a novel idea.....epoxy the zerk in place.

My bet would be it won't stay there long. D

 

[Alex Clark]

Nope, it did not stay there long... I was all happy with myself and was screwing the zerk into the epoxied nut..... It was actually pretty tight and I decided to see if I could get another quarter wrench-turn so the 45 degree angle zerk would be facing to one side... that was when the epoxy said it had more than it could handle...

 

[tempdoug]

Alex, in our Farmers Union i seen a fitting that was punch shaped that you take the regular end of the grease gun hose and put this on. Its not the needle type more v shaped, but something that looked like it could be pushed and held on to the small grease hole and you could get grease in the tube. Then when done put a small piece of tape over the hole so moisture dosent get in? Working through the inspection plate theres not a lot of room but i think it would work especially with a electric grease gun. maybe google a search on grease gun fittings?

 

[SuperCub MD]

Whatever you weld/clamp/glue back there, make sure it doesn't restrict the elevator bellcrank movement, I have seen this problem.

 

[mike mcs repair]

Whatever you weld/clamp/glue back there, make sure it doesn't restrict the elevator bellcrank movement, I have seen this problem.

I was wondering about that too with clamp version.... Didn't have one with tail on to see....

Welded on nut is fine, do it to every one...

 

[Alex Clark]

The nut is now welded in place. I could not reach the back area with the MIG, so I used epoxy around the back side area to keep the grease from squirting out around the nut.