[Heathkit] Stuck pot shaft lubrication
jack m
oldvette at hotmail.com
Sun Aug 10 16:01:16 EDT 2014
I recently saw where a pot refurbishment included squirting a drop or two of 10W-30 SYNTHETIC motor oil directly into the wiped surface - as well as at the shaft/collar point - of the pot as an effective noise-reducing lubricant . Intuitively, this does not sound proper, but I was interested in other opinions.
I've always used tuner cleaner or de-oxit to date. Synthetic 10W-30 sure would be cheaper after the initial $5.00 per quart expense, assuming you don't already put this stuff in your beloved classic, where you cold "save out" a "lifetime supply" syringe-full.
Jack W3RU
> From: heathkit-request at mailman.qth.net
> Subject: Heathkit Digest, Vol 127, Issue 5
> To: heathkit at mailman.qth.net
> Date: Sun, 10 Aug 2014 12:46:35 -0400
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> 1. Re: [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
> (w5sum at comcast.net)
> 2. Re: Pot shaft stuck 'rock solid' (Thomas Frobase)
> 3. Re: [Heathkit:Yahoo] Pot shaft stuck 'rock solid' (Chris Trask)
> 4. Re: [Heathkit:Yahoo] Pot shaft stuck 'rock solid' (john)
> 5. Re: [Heathkit:Yahoo] Pot shaft stuck 'rock solid' (Chris Kepus)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 10 Aug 2014 06:42:42 -0500
> From: <w5sum at comcast.net>
> To: <G3OOU at aol.com>, <heathkit at yahoogroups.com>,
> <heath at puck.nether.net>, <heathkit at mailman.qth.net>
> Cc: rsmyers at rogers.com
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
> Message-ID: <B1DB681534FC4BB087B2E02D5C93107D at MININTMC1HLDC>
> Content-Type: text/plain; format=flowed; charset="UTF-8";
> reply-type=original
>
> I have fought this battle and won, but don't get in a hurry. Go guy a can of
> Kroil!
> It?s the magic stuff, turn the radio up so that the shaft is pointing
> straight up and
> spray a 'small' amount around the shaft. You will actually be able to see it
> creep in around the shaft and disappear. Do this a few time and then just
> let it
> sit. After 24 hours "gently" try to move the shaft with plier.
> We have a saying on the railroad, if it will wink it will screw! Now what
> that means
> is this, if you can get it to move even a smidgen, put some more oil on it
> and wait
> a day and try again, it will move a little more every day until it comes
> loose. We use
> use this method on rusted bolts and screws.
> Or you can go at it like a bull in a china cabinet and put vice grips on it
> and
> destroy your control
>
> 73 and God bless
>
> w5sum
>
> -----Original Message-----
> From: Bob via Heathkit
> Sent: Sunday, August 10, 2014 4:08 AM
> To: heathkit at yahoogroups.com ; heath at puck.nether.net ;
> heathkit at mailman.qth.net
> Cc: rsmyers at rogers.com
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
>
> Hi Rob
>
> A very thin penetrating oil or even parafin and some patience should work
> but may take a while. The pot on my SB610 does have a small amount of
> sideways as well as back and forward play in the rotatable shaft so there
> should
> be room for the oil to wick into the gap.
>
> If you can get the control out of the 610 then try suspending the shaft end
> in penetrating oil or soak a piece of tissue in the oil and wrap it around
> the control shaft and leave for a while. Give it a twist now and then and
> it should eventually clear.
>
> The problem will be more difficult if the blockage is caused by corrosion
> instead of old dried grease.
>
> 73
>
> Bob
>
> Bob F Burns G3OOU
> C Eng, FIET, MSE
> G-QRP 6907
> Crystal Palace Radio & Electronics Club: www.g3oou.co.uk
> Technical web site: _www.qsl.net/g3oou_ (http://www.qsl.net/g3oou)
> @BobFBurns on Twitter: http://twitter.com/BobFBurns
>
>
> In a message dated 10/08/2014 07:07:00 GMT Standard Time,
> heathkit at yahoogroups.com writes:
>
>
>
>
> I have a pot whose shaft got stuck 'rock solid' somehow after a few years
> of
> non use - but at one time it worked smoothly (it's the ON/OFF switch + pot
> on my SB-610).
>
> Are there any standard solutions for this?
>
> Thanks,
> -- Rob Myers, VE3JQL
>
>
> __._,_.___
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> ____________________________________
> Posted by: "Robert Myers" <rsmyers at rogers.com>
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> ------------------------------
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> Message: 2
> Date: Sun, 10 Aug 2014 07:31:39 -0500
> From: "Thomas Frobase" <tfrobase at gmail.com>
> To: "'Robert Myers'" <rsmyers at rogers.com>, <heathkit at yahoogroups.com>,
> <heath at puck.nether.net>, <heathkit at mailman.qth.net>
> Subject: Re: [Heathkit] Pot shaft stuck 'rock solid'
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset="us-ascii"
>
> Pull the pot and soak the shaft in Marvel Mystery oil ... tom, N3LLL
>
> -----Original Message-----
> From: Heathkit [mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Robert
> Myers
> Sent: Sunday, August 10, 2014 2:07 AM
> To: heathkit at yahoogroups.com; heath at puck.nether.net;
> heathkit at mailman.qth.net
> Cc: Robert Myers
> Subject: [Heathkit] Pot shaft stuck 'rock solid'
>
> I have a pot whose shaft got stuck 'rock solid' somehow after a few years of
> non use - but at one time it worked smoothly (it's the ON/OFF switch + pot
> on my SB-610).
>
> Are there any standard solutions for this?
>
> Thanks,
> -- Rob Myers, VE3JQL
>
> ______________________________________________________________
> Heathkit mailing list
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> ------------------------------
>
> Message: 3
> Date: Sun, 10 Aug 2014 07:35:51 -0700 (GMT-07:00)
> From: Chris Trask <christrask at earthlink.net>
> To: heathkit at yahoogroups.com, heathkit at yahoogroups.com,
> heath at puck.nether.net, heathkit at mailman.qth.net
> Cc: Robert Myers <rsmyers at rogers.com>
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
> Message-ID:
> <658119.1407681352339.JavaMail.root at wamui-haziran.atl.sa.earthlink.net>
>
> Content-Type: text/plain; charset=UTF-8
>
> >
> >I have a pot whose shaft got stuck 'rock solid' somehow after a few years of
> >non use - but at one time it worked smoothly (it's the ON/OFF switch + pot
> >on my SB-610).
> >
> >Are there any standard solutions for this?
> >
>
> I had this situation years ago with a Heathkit high voltage power supply. I applied Liquid Wrench to the shaft at the front panel, a little bit at a time for more than a week, carefully trying to move the shaft before each application. It gradually came loose and has been working fine ever since then.
>
> It takes time, patience, and Liquid Wrench to loosen things like this.
>
>
> Chris Trask
> N7ZWY / WDX3HLB
> Senior Member IEEE
> http://www.home.earthlink.net/~christrask/
>
>
> ------------------------------
>
> Message: 4
> Date: Sun, 10 Aug 2014 11:51:45 -0400
> From: john <johnmb at nc.rr.com>
> To: Chris Trask <christrask at earthlink.net>,heathkit at yahoogroups.com,
> heathkit at yahoogroups.com, heath at puck.nether.net,
> heathkit at mailman.qth.net
> Cc: Robert Myers <rsmyers at rogers.com>
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
> Message-ID: <6.2.1.2.2.20140810115057.04ab6da0 at pop-server.nc.rr.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Placing the tip of your BIGGEST soldering iron on the shaft of the pot near
> the bushing may help too.
>
> John K5MO
>
>
> At 10:35 AM 8/10/2014, Chris Trask wrote:
> > >
> > >I have a pot whose shaft got stuck 'rock solid' somehow after a few years of
> > >non use - but at one time it worked smoothly (it's the ON/OFF switch + pot
> > >on my SB-610).
> > >
> > >Are there any standard solutions for this?
> > >
> >
> > I had this situation years ago with a Heathkit high voltage power
> > supply. I applied Liquid Wrench to the shaft at the front panel, a
> > little bit at a time for more than a week, carefully trying to move the
> > shaft before each application. It gradually came loose and has been
> > working fine ever since then.
> >
> > It takes time, patience, and Liquid Wrench to loosen things like this.
> >
> >
> >Chris Trask
> >N7ZWY / WDX3HLB
> >Senior Member IEEE
> >http://www.home.earthlink.net/~christrask/
> >______________________________________________________________
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> III
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> ------------------------------
>
> Message: 5
> Date: Sun, 10 Aug 2014 09:46:28 -0700
> From: "Chris Kepus" <ckepus at comcast.net>
> To: "'Chris Trask'" <christrask at earthlink.net>,
> <heathkit at yahoogroups.com>, <heath at puck.nether.net>,
> <heathkit at mailman.qth.net>
> Cc: 'Robert Myers' <rsmyers at rogers.com>
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
> Message-ID: <001501cfb4ba$a2506c10$e6f14430$@net>
> Content-Type: text/plain; charset="us-ascii"
>
> I'll second, third, and fourth the following statements:
> 1: Buy/make one of the following penetrants (all will work) - Liquid Wrench,
> Kroil, PB Blaster, 50% Acetone/50% ATF (automatic transmission fluid)
> 2: Apply as recommended (shaft pointing up.
> 3: Add GREAT amount of patience - resist touching for a minimum of 12 hours.
> Add a bit of additional penetrant about every 4 hours - doesn't take much.
> 4: Use Trask's and several other's techniques of applying moderate torque
> and twisting it back and forth. Attach a spare knob and tighten set screw
> (use a kno with two set screws if you have such a critter). If it doesn't
> move. Don't force it. Try again in 8 hours.
> 5: If after a couple of days it still isn't moving, you can try John's
> method of applying heat and repeat steps 3 - 4. Use heat again.
> 6: If it still hasn't loosened up after 3-4 days of work...you can continue
> the soaking treatment; or you can try to "break" the bond of whatever crud,
> crap, or corrosion and risk permanently damaging the control...which at this
> point you are prepared to trash, anyway. Of the suggestions presented, the
> one likely to work is to use a pair of vise grips / channel locks or combo:
> One tool to grab the body of the pot, the other on the shaft. You can figure
> out the rest.
>
> 73 es Good luck,
> Chris
> W7JPG
>
>
> -----Original Message-----
> From: Heathkit [mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Chris
> Trask
> Sent: Sunday, August 10, 2014 7:36 AM
> To: heathkit at yahoogroups.com; heathkit at yahoogroups.com;
> heath at puck.nether.net; heathkit at mailman.qth.net
> Cc: Robert Myers
> Subject: Re: [Heathkit] [Heathkit:Yahoo] Pot shaft stuck 'rock solid'
>
> >
> >I have a pot whose shaft got stuck 'rock solid' somehow after a few
> >years of non use - but at one time it worked smoothly (it's the ON/OFF
> >switch + pot on my SB-610).
> >
> >Are there any standard solutions for this?
> >
>
> I had this situation years ago with a Heathkit high voltage power
> supply. I applied Liquid Wrench to the shaft at the front panel, a little
> bit at a time for more than a week, carefully trying to move the shaft
> before each application. It gradually came loose and has been working fine
> ever since then.
>
> It takes time, patience, and Liquid Wrench to loosen things like this.
>
>
> Chris Trask
> N7ZWY / WDX3HLB
> Senior Member IEEE
> http://www.home.earthlink.net/~christrask/
> ______________________________________________________________
> Heathkit mailing list
> Home: http://mailman.qth.net/mailman/listinfo/heathkit
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