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Removing Tanks

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larywil(at)comcast.net
Guest

Posted: Sat Jan 19, 2008 7:36 am Post subject: Removing Tanks

Hello again,



I mis-worded my question. It should have said,"how do you remove a tank?"



  I think most of us would have a tough time working on a plate with 

the tank still on the wing. It could be done, maybe, but I think it's 

time for me to take the tank off and do a good job on the leaks, 

replace the sender, and comply with the fuel sender SB. So... since I 

didn't build my RV-4, I am asking for advice in removing the tank. 

I'm pretty sure I'll have to use a razor blade around certain edges 

to avoid chipping the paint. I know to drain the tank. Are there any 

other pitfalls? Any other tips?



The rest of the advice about removing and replacing the plate(s), I 

have printed out in LARGE PRINT on my work sheets. I should have 

asked for that advice also, but my first objective is to remove the tank.



To those of you who have posted suggestions, keep on doing it! There 

are plenty of us doing this for the first time, and there is plenty 

of up-to-date solutions that we are unaware of. The archives are 

great, but it can be like a safari through the Congo trying to find 

what you really need. Thanks again.



Louis

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ceengland(at)bellsouth.ne
Guest

Posted: Sat Jan 19, 2008 3:04 pm Post subject: Removing Tanks

Louis Willig wrote:

 	  Quote: 	
		   

 

 Hello again,

 

 I mis-worded my question. It should have said,"how do you remove a tank?"

 

  I think most of us would have a tough time working on a plate with the 

 tank still on the wing. It could be done, maybe, but I think it's time 

 for me to take the tank off and do a good job on the leaks, replace the 

 sender, and comply with the fuel sender SB. So... since I didn't build 

 my RV-4, I am asking for advice in removing the tank. I'm pretty sure 

 I'll have to use a razor blade around certain edges to avoid chipping 

 the paint. I know to drain the tank. Are there any other pitfalls? Any 

 other tips?

 

 The rest of the advice about removing and replacing the plate(s), I have 

 printed out in LARGE PRINT on my work sheets. I should have asked for 

 that advice also, but my first objective is to remove the tank.

 

 To those of you who have posted suggestions, keep on doing it! There are 

 plenty of us doing this for the first time, and there is plenty of 

 up-to-date solutions that we are unaware of. The archives are great, but 

 it can be like a safari through the Congo trying to find what you really 

 need. Thanks again.

 

 Louis




	


I had to disconnect the fuel line on both ends so it could be retracted 

into the fuselage slightly. I had to move the tank toward the fuselage 

slightly to get it off and there's the back flange of the inboard rib to 

deal with also; that's why I had to move the fuel line.



I used popsicle sticks to spread the back flanges slightly so that the 

dimples wouldn't hang on the countersinks in the spar flanges. A thin 

blade like a small putty knife can be used to lift the flanges to insert 

the sticks.



It was a little bit of a chore to get the tank started, but fairly easy 

after that to remove it. I think I used a small pry bar between the back 

of the tank & the spar to get it started. I did it alone, with a 

rigged-up padded platform under the tank in case it tried to fall.



I think that I used thin cardboard or plastic sheet to protect the spar 

flanges when I re-installed the tank. Hard to explain in words, but it 

was easier to spread the flange & insert multiple sticks to remove the 

tank & easier to use a continuous strip of sheet material while pushing 

the flanges back over the spar during re-installation.



Hope that helps,



Charlie

flying -4, -7 finish kit on order

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