[TowerTalk] Rohn TB-4 bearings, sheared off transverse bolts !!

[Mark Robinson]

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 at pacbell.net>
To: "Jim Thomson" <jim.thom at telus.net>
Cc: <towertalk at 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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