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Re: [TowerTalk] Loosening Al tubing to Al Tubing

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Loosening Al tubing to Al Tubing
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sun, 12 Jun 2016 12:48:44 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
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
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73

Roger (K8RI)


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