I found out that it was impractical to move the tilt fixture from my first
LM470 to the second LM470 when I wanted to tilt the tower so I ordered a
second tilt fixture. By that time Tashjian had started his company to build
towers. I specified that the tilt fixture should use a k-2550 rather than
the k-1550 and told Tashjian that I thought the k-1550
would be overloaded. Maybe that helped to change what was used in the later
sales.
k7puc
----- Original Message -----
From: "Al Williams" <alwilliams@olywa.net>
To: "Mike" <noddy1211@sbcglobal.net>; <towertalk@contesting.com>
Sent: Wednesday, November 11, 2009 9:10 AM
Subject: Re: [TowerTalk] winch handle free spin
> The first LM470 tilt fixture that came with the tower was purchased during
> the short time
> that First Call was handling the selling for Paragon (If I remember
> correctly) and it had a k-1550. It was very hard to tilt the tower up
> even without any antennas mounted. Also on lowering the tower its
> screeching could be heard for miles! I didn't change the cabling as
> directed to take advantage of the motor weight at the butt end of the
> tower because there was no pulley advantage in their setup. I did a rough
> stress calculation and determined that the k-1550 was being used exceeding
> its specification. I then replaced the k-1550 with the k-2550 and at the
> same time added two more pulleys and replaced the cable with a longer one.
> One pulley at the tower and the other new pulley at the top of the tilt
> fixture. The US tower HDX572 uses four pulleys to tilt the tower, My
> setup is now easy to crank but takes longer so I use a drill motor.
>
> -- Original Message -----
> From: "Mike" <noddy1211@sbcglobal.net>
> To: <towertalk@contesting.com>
> Sent: Wednesday, November 11, 2009 7:51 AM
> Subject: Re: [TowerTalk] winch handle free spin
>
>
> I thought that the tilt over winch for the LM-470 Tower was a Fullerton
> 2550, at least that is what came with my LM-470 tilt over fixture. It is
> hard work to pull the tower up from its 8' horizontal elevation to
> vertical
> with the 2550 winch if you do not use a counter weight at the motor end of
> the tower, even with a small 3 element Steppir attached to it. I can't
> imagine what it would be like with K-1550, hard work I would guess.
>
> Plus the cable routing from the winch as standard is wrong and puts undue
> stress on the winch, which tends to want to peel off the mounting plate.
>
> Mike, K6BR
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Al Williams
> Subject: Re: [TowerTalk] winch handle free spin
>
>
> Yes, 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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