I have read that the best stuff for soaking rusted parts in is acetone and
ATF transmission fluid. Google it. You might want to give it a try if all
else fails.
http://www.zrxoa.org/forums/showthread.php?t=207734
Mark N1UK
----- Original Message -----
From: "Grant Saviers" <grants2@pacbell.net>
To: "Jim Thomson" <jim.thom@telus.net>
Cc: <towertalk@contesting.com>
Sent: Friday, 02 July, 2010 10:24 AM
Subject: Re: [TowerTalk] Rohn TB-4 bearings, sheared off transverse bolts !!
> Put the part with the sheared bolts into the oven at 450 F for an
> hour. Aluminum's coefficient of expansion is much more than steel so
> that should break them loose. Drill for the screw extractors first and
> make sure they fit tightly. With oven gloves you might try with the
> part still hot or wait for it to cool, put on some real Screw Loose etc.
> and give it a go. Drilling on center and straight is the hard part.
>
> Good hardware stores, Sears, tool suppliers have sets of screw
> removers. Sears also sells a remover set for nuts that have been
> buggered. Using an impact wrench, they worked on my dozer when the nut
> was a rusted rounded blob but wear out after a few tough nuts. They are
> safer than burning off the nut and bolt when big heat is a no-no.
>
> Grant KZ1W
>
>
> Jim Thomson wrote:
>> OK... the 3 x 3/8" G-5 bolts [ that appear to be cold galvanized] on
>> BOTH my Rohn TB-4 bearings
>> are rusted really badly. I soaked all 6 of em with WD-40.. from both
>> sides. I got 4 of em out with no problems
>> and of course 2 x of em sheared right off flush to the aprx 3/4" thick AL
>> collar! [ one sheared on each bearing]
>>
>>
>>
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