Looking at the available information on the use and care of wire rope, the
attached link may be of interest:-
73, John G3JVC/GM3JVC.
> Date: Mon, 3 Sep 2012 17:22:15 -0700
> From: Jim Lux <email@example.com>
> To: Steve Maki <firstname.lastname@example.org>
> Subject: Re: [TowerTalk] Crank-ups.....do NOT lubricate your cables
> from US tower
> I suspect that rigging companies and crane ops also do regular inspection
> and cleaning of those cables too, just like the ones on gondola and chair
> On Sep 3, 2012, at 17:05, Steve Maki <email@example.com> wrote:
>> I wonder why crane companies keep their cables (on million dollar
>> cranes) lubed religiously?
>> On this particular topic, I would not place much faith in the
>> manufacturer's edicts, unless you're looking for a reason to keep busy
>> replacing the cables more often than otherwise needed.
>> -Steve K8LX
> ## all the local ship yards around here have 55 gallon drums of
> pre-lube 6, 9, + 11. This stuff is literally
> poured onto those cables, right at the drum, via an oiler device. Its
> just penetrating oil, to lubricate the inner strands.
> Nobody is changing cables every 3 years. UST also wants me to check the
> oil in the gearbox every month, and also
> change it out every 2 years. Turns out those hub city gear boxes were
> never meant to be used for lifting applications.
> They were designed for stuff like conveyor belts, etc. They are
> actually called ....speed reducers. They were never intended for
> a hoist application. The UST control box on the tower is not water
> proof nor is enclosed in anything remotely close
> to a nema box. Whoever designed their anchor bolt configuration + rebar
> cage on the HDX-689 was clueless. Neither
> meet any spec here in town. If you put a 14 foot mast out the top of
> their tower, you can kiss that 70 mph rating goodbye.
> I wouldnâ??t be using the UBC-97 exposure B specs either, use exposure
> C, or use the RS-222 rev g specs....if you can find em.
> The story I got from the crane and ship yard folks is... without the use
> of the various grades of prelube slopped onto the
> cables, the inner strands can rub together..and break. You cant see
> internal damage from the outside.
> It would be nice if UST provided detailed instructions on how to
> re-cable their towers. They insist you recable their
> towers, but then wont provide the info. Check out their info on how much
> torque required for both the anchor bolts +
> leg bolts..... answer, snug fit. What kinda BS answer is that.
> Jim VE7RF
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