Yes, it has happened to me and I have posted it to this site at least twice.
It happened to me but I was able to grab the winch handle (k1550) and stop
the "freewheel".
This is how it happened to me: The application of the winch was for the
tilt fixture of the LM470 tower. The tower was nested and I pried the tower
to start its rotation to tilt it down. After the tower had been tilted
erect, the winch can get into a free wheel mode.
If it remains in the free wheel mode i.e. by not winching it back taught, it
is free .
You can test this action by backing off after you get the winch taught and I
think that you
will find the winch gets into the free wheel mode. It needs to be winched
until the table is
again taught to engage the clutch.
I don't know the mechanism of the winch--this is what I have observed.
k7puc
----- Original Message -----
From: "Joe" <wd0m@wd0m.com>
To: "luke webber" <luke_webber@hotmail.com>
Cc: <towertalk@contesting.com>
Sent: Tuesday, November 10, 2009 9:15 AM
Subject: Re: [TowerTalk] winch handle free spin
Hi Luke,
First - you're right - you are NOT supposed to put grease on the
friction plates....they're supposed to have "friction", not be greased,
even accidentally, as you point out in your note. That ensures they
will hold, rather than freewheel. I've had a Fulton K1550 for a decade,
and had no problems with it. I've recently replaced it with a K2550 on
my US Tower TX-455, just to make it a bit easier to raise and lower with
the extra mechanical advantage. Both winches use the friction plate
method, and both work very well. I've heard the "rumor", but never seen
any documented failure as you describe. I'm certain you'll hear from
others....
73
Joe
WDØM
http://www.wd0m.com
luke webber wrote:
> i've heard claims that a clutch pack, braking system, on a fulton K1550
> winch can slip even when a person is trying to raise a tower.
>
> is this possible? what could cause this to happen? could it be out of
> adjustment, perhaps grease on the friction discs, or the pawl being out of
> alignment?
>
> thanks
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