[Swan] Swam MX 100 PTO

[John King]

Thanks a lot Jim, I really appreciate your assistance. I am curious whether you have ever had one of the MX 100 PTOs get gunked up with dried grease or not? I have some 30 year old + Ten Tec PTOs and they tend to do the same thing if not tuned  once in a while. I have another problem with the MX 100 but I will not try to find it until I get the PTO moving again.

I will let you know how I make out with the PTO and then I will pick your brain for additional input on the MX 100. Thanks again and 73, John, K5PGW



----- Original Message ----
From: Jim Zellmer <jim at ka0vsl.com>
To: Discussion of equipment manufactured by Swan <swan at mailman.qth.net>
Sent: Sat, April 24, 2010 12:07:58 PM
Subject: Re: [Swan] Swam MX 100 PTO

John,
I just took the top cover off one my 100mx s.  A little solvent should 
often the old grease.  I would get a pop bottle cap to use as a 
container.  Put a little acetone or isopropyl alcohol in the cap and mix 
it with a bit of ATF or other light oil.  Stir it up with a quew tip and 
tap a little of the mixture on either side of the brass bar the the 
threaded screw goes through.   You could also dab a little on the 
bearing (front end of the screw behind the front panel) and the ball 
seat at the other end of the thread screw.  Just just little bit, ie 
don't slop it all over.  Let is sock a little and try rocking the PTO 
knob back and forth.  It should loosen up for you.  If you have some, 
you could try a little Hoppes gun oil in the same manner.  When you get 
it moving, you can clean off the old grease with move quew tips and 
alcohol.  I used a couple of drops of Mobil 1 oil to lube the front 
bearning, ball seat and both sides of the brass bar when every thing was 
cleaned up.  These are great little rigs.

Good Luck

Jim Zellmer
KA0VSL

John King wrote:
> I have a Swan MX 100 that has been on the shelf for about 10 years. The other day I took it off the shelf and hooked it up to find that the PTO lead screw would not turn by turning the tuning knob. I suppose the white grease on the lead screw of the PTO has aged and hardened thus keeping the screw from turning to change frequency and causing the vernier to slip like a clutch. I like the old transceiver and want to put it back on the air.
>
> Have any of you experienced this problem with the PTO screw not turning? If so, how did you free it up? I suppose there is some way to dilute the grease and soften it up or soften it up by slight heat. There are plastic gears on the PTO shaft and I do not want to damage the gears. I hesitate to make any effort to disassemble any part of the PTO.
>
> I would appreciate your input on this problem based on your actual experience  and knowledge of this particular PTO and its drive line. Thanks for your assistance. 73, John, K5PGW
>
>
>
>      
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