[TowerTalk] Loosening Al tubing to Al Tubing

[Roger (K8RI) on TT]

There are much better penetrants than WD40. The WD stands for water 
displacement.  HOWEVER with Al to Al, in small engines with stuck 
pistons, you take the spark plug out, dump in some liquid WD40 and "try 
it the next day. Generally the motor will turn over easily.

The key in all of these approaches is the "wait"

Try PB Blaster, or Mouse Milk (yes that's a real name) and wait. You 
need to give the penetrating oil tine to work. "Generally", it's not a 
squirt and pull!

Forcing stuck, Al to Al is likely to cause galling where the Aluminum in 
the tubes "joins" as if they were welded.

"Usually" old antenna tubing is stuck due to oxidation, or salt 
corrosion. In that case heat "may" work, but it's a fine line between 
not enough and too much. If it were me(and it's not), I'd give the end 
of the outer tube a shot of PB Blaster, wait 24 hours and then try 
"tapping the screwdriver in the end trick suggested in one of the first 
couple of posts

73

Roger (K8RI)


On 6/12/2016 Sunday 8:29 AM, StellarCAT wrote:
> I have a few sections from a used yagi purchase that are like this - a 
> few of them I managed to get apart with lots of effort using a screw 
> driver in an existing hole and lots of pulling ... the rest just 
> wouldn't budge. Heating I don't believe works - its near impossible to 
> heat them independently - so they expand together... I tried WD-40, 
> and the slippery stuff - can't remember its name but for this purpose 
> - nothing worked. These pieces are now in my scrap pile replaced with 
> new material from DXE.
>
> Gary
>
>
> -----Original Message----- From: Don W7WLL
> Sent: Saturday, June 11, 2016 7:31 PM
> To: Towertalk
> Subject: [TowerTalk] Loosening Al tubing to Al Tubing
>
> Want to restore a small inherited tribander for portable activity.
>
> Have a couple of tube to tube joints that are not coming apart with 
> ‘gentle persusian’. They been sitting in a coast air environment for a 
> few years (maybe 10).
>
> What recommendations here on TT of best solutions (s) to work into the 
> joints.
>
>
> Don W7WLL
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk


-- 

73

Roger (K8RI)


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus