If the bearing races are good then you could just replace the bearings.
You should be able to buy them at most bearing supply houses. The top of a TB-3
just lifts off and the bearings spill out everywhere. Put the bearing in a
piece
of Tupperware to catch the bearings. As I recall the bolts are not stainless.
They do have a point on one end and a square head. Just take it apart, If the
races are good then get new bearings. and put it back together. NO GREASE. The
bolts could probably be galvanized or stainless. Just use the proper
installation for whatever type you use. Grade 5 or up.It's been awhile since I
have looked at one so correct me if I'm wrong. Maybe you even have the bearing
one your bench. Much easier to work on Good Luck
73 DE K4XZ Joe Patrick
God Made Man
Sam Colt Made Them Equal
________________________________
From: John W <xnewyorka@hotmail.com>
To: TowerTalk <towertalk@contesting.com>
Sent: Tue, May 28, 2013 10:12:07 AM
Subject: [TowerTalk] Is Rohn TB3 Thrust bearing OK to use with "flat spots" on
bearings?
I have an old Rohn TB3 that came with a used tower I bought. Cosmetically it
looks good and spins without any unusual noise, but it feels like the bearings
are somewhat oval in shape instead of round. It's hard to explain, but it's
almost like a sort of ratcheting effect, like there is a little notch every few
degrees, so that it almost 'clicks' into place, but without a clicking sound.
I haven't tested it with a load, but I assume it would probably spin OK with
only a very small increase in friction.
Can it be used like this, or does it need to be repaired? If it needs to be
repaired, how does it come apart and where can I obtain replacement bearings
for
it?
On a related note, is it recommended to use stainless bolts for the set screws
that hold the mast in place, or galvanized? (The originals are gone.)
Thanks,
John
W2ID
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|