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Re: [TowerTalk] rotor removal question

To: <w2ttt@att.net>, "'Dan Hearn'" <dhearn@wwnw.net>,<EL34GUY@aol.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] rotor removal question
From: "Bill" <w7vp@comcast.net>
Date: Sat, 15 Apr 2006 07:42:18 -0700
List-post: <mailto:towertalk@contesting.com>
For only 200# Try this.

Bolt a muffler clamp a few inches from the rotator.  Then hook one end of a 
loading strap (the kind with the ratchets) to a tower rung a couple feet 
above the clamp and wrap the strap around the mast below the clamp.  Hook 
the other end of the strap to an opposite rung, again a couple feet above 
the clamp.  Now use the ratchet to lift the mast.

I have used these straps effectively for a lot of things on the tower over 
the years.

Bill
W7VP
----- Original Message ----- 
From: "J. Gordon Beattie, Jr., W2TTT" <w2ttt@att.net>
To: "'Dan Hearn'" <dhearn@wwnw.net>; <EL34GUY@aol.com>; 
<towertalk@contesting.com>
Sent: Saturday, April 15, 2006 6:50 AM
Subject: Re: [TowerTalk] rotor removal question


> Dan et al,
> Your idea is great, especially for an SSV tower.
> They are BIG sections, so the jack should fit.
>
> One idea would be to take a bulky U-bolt and saddle and attach it to the
> mast and see if you could push up on the U-bolt and saddle with the jack.
> If you don't have aluminum U channel to support the jack, then try 
> doubling
> 2 x 8s.
>
> 73,
> Gordon Beattie, W2TTT
> 201.314.6964
> w2ttt@att.net
> w2ttt@arrl.net
> w2ttt@att.com
>
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Hearn
> Sent: Saturday, 15 April, 2006 01:05
> To: EL34GUY@aol.com; towertalk@contesting.com
> Subject: Re: [TowerTalk] rotor removal question
>
> That is basically how I lift my 2 7/8 x 1/4 x 20 ft mast. I use an auto
> scissor jack. The top of the jack is the type that has a slot in it. A
> vertical plate is bolted to the mast with 2 muffler clamps and the edge 
> fits
> into the slot in the top of the jack. Supporting the base of the jack is a
> bit of a problem. I have a piece of 6 inch aluminum channel about a foot
> long. One edge of the channel rests on the top of the bearing. Two pieces 
> of
> all thread rod which fit snugly inside the vertical tubing corner posts of
> the crankup, are bolted to the channel. Nuts on the all thread rod clamp 
> it
> to the channel and can be adjusted to set on the top of the tower leg. 
> When
> the channel is leveled the mast can be raised easily.
>  I have 2 bearing plates so the mast is stable when jacked up. If I
> understand your situation, You have only one bearing plate. You might be
> able to fab something up using a moderately loose U bolt around the mast,
> above the rotor, mounted to a vertical plate. This would be U bolted to 
> two
> of the tower legs using spacer blocks of suitable thickness. I am not sure
> what the top of SSV looks like but hope some of this will be applicable to
> your problem. 73, Dan, N5AR
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com]On Behalf Of EL34GUY@aol.com
> Sent: Friday, April 14, 2006 9:19 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] rotor removal question
>
>
> Hello Everyone,
>
> I had a problem changing out my rotor today. Its a rd1800 rotor on a rohn
> ssv tower. The 2inch mast has slid down farther on top of the  rotor mount
> and
> Im unable to remove the rotor now(cant slide it out to  replace). Im 
> looking
> for advice on how to lift up the mast maybe an inch,  considering the 
> rd1800
> is
> still underneath the mast. The mast and antenna  weigh about 200lbs and Im
> unable to lift it w/o some assistance.  The only  support I have for the
> mast is
> the thrust bearing(should have put another plate  or support inbetween) on
> top
> of the tower. Im considering trying to attach  some clamp or bar metal to
> the
> mast and use a car jack or something to push the  mast back up to get the
> rotor out. Tower is 80ft and Id like to do it right the  first time. Any
> ideas on
> how to jack the mast back  up?  Thankyou.
>
> Mark
> W0NCL
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