[TowerTalk] [Bulk] Lifting a mast off the rotator

[Grant Saviers]

The used OR-2800 was driving a 3" mast, but I have one driving a 2" 
without a centering block w/o problems (so far) but a bigger load is 
going onto the 2" mast shortly.

Medium strength Loctite is a good idea if the internal threads can be 
degreased.  Instead of a split ring washer, I use Nord-Locks for 
critical fasteners.  Check out their video re locking fastener tests.

http://cdn.nord-lock.com/wp-content/uploads/2015/12/Nord-Lock-Junker-test-HD_1280x720.mp4

Grant KZ1W

On 4/24/2016 21:00 PM, Jim Thomson wrote:
> Date: Sun, 24 Apr 2016 20:05:13 -0700
> From: Grant Saviers <grants2 at pacbell.net>
> To: Les Kalmus <w2lk at bk-lk.com>, TOWERTALK at contesting.com
> Subject: Re: [TowerTalk] [Bulk]  Lifting a mast off the rotator
> Les,
>
> On a used 2800 I acquired the prior owner had secured a cut off box end
> wrench on the center bolt with a screw through the wrench handle and
> threaded into the Orion plate about 2" out from the bolt, oriented so
> the split mast clamp clears the wrench.   Now I know why he did that.
>
> Grant KZ1W
>
> ##  slick idea,  but it wont work if the optional m2  self centering 1/2 inch thick,
> triangular chunk of AL is used.  When the self centering device is use, a really
> long  1/4-20  SS bolt is provided.... to get from top of  self centering block....
> all the way through the block, then to the threads in the steel base plate.
>
> ##  I have 2 of the OR-2800  rotors.... and the  self centering block is  only required
> if a 2 inch mast is used.   And even then, its  really not required  with a 2 inch mast.
>
> ##  The self centering block is  pyramid shaped, and the entire block  fits inside a
> 2 inch mast.  Dunno if it will still fit inside a 2 inch mast, that has a .375 wall thickness.
>
> ##  If a 2 inch mast used, the clamp would normally be adjusted so its just a bit bigger
> than 2 inch.   If  2 x thrust bearings are used, the self centering device is def not required.
>
> ##  I would not use it.  Instead use the  shorter   1/4-20  bolt.... but use  some  blue  loctite
> on the threads.    Purple locite is slightly weaker than blue loctite..and will also work. Or at
> least use a SS  split ring lockwasher on top of a SS fllatwasher,  below the bolt head.
>
> ##  the scissor jack is a good  idea.  The simple  bottle jacks  will also work, but have a limited
> amount of vertical lift distance.   Cheap, and available from   1/2  to 20 ton.  The issue with bottle jacks is:
> you can precisely control the lifting function..... but when u go to let it down, it comes down quickly.
>
> Jim  VE7RF
>
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