This last weekend I had another turnout motor go bad. It had been acting up for a while now but usuly would start working after I manually flipped the turn out. But now I couldn't get the switch to through.
So I had to dig up another section of track out of the ballast. I'm out of any replacements so I decided to try to fix it my self.

I considired trying the fix that David did https://www.marklin-user...aspx?g=posts&t=14691
But in this case it would not of made any difference because the metal part of the solenoid was stuck inside the coils.
After I freed it, I connected it to an old push button switch and tried to get it working, but it still was sticking and the coils got very hot.

I took out the metal actuator it was a little rough on one side where it had been stamped. I filed down the edges till smooth.
It now was better but it still stuck about half the time.
I noticed that on top of the actuator that there was a polished streak across the top were it had rubbed in side the coil.
I didn't want to run any type of file or sand paper through the coil as it might make the plastic rougher or make the slot to wide causing the actuator to cock sideways making it worse.
So I took a wooden tooth pick and with a hammer flatten it out just a little bit till I could push it through the coil.
I never saw anything fall out of the coil but something must of cleared out. I figure there must of been some scraped plastic that was dragging across the actuator and the tooth pick tore it away.
I also think that the more it stuck the more the coils would get hot causing the plastic to expand and making it drag even worse.

After I put it all back together the solenoid snaps from one position to the other like new. The coil no longer heats up do to the quick movement.

Woohoo! ;-) My kind of repairs! That´s what I like about our hobby, and why I dislike the new locomotives with so much electronics and closed/sealed motors; no way (for me) to repeair them.
Good job, man!

I will say this. This turnout motor is one that gets used a lot, and has been on the layout for a many years now.

I have all of my turn outs connected to k83's and run off a separate circuit via a delta booster. I initially had the booster connected to the accessory side of the transformer but switched it to the track power after I was having some problems with some of the solenoids. Track side power allowed me to set the voltage to 16v. I'm thinking that the 18V+ of the accessory side was a little too much for the little solenoids. That might of put too much heat into the plastic causing it to expand and drag on the actuator as it was activated.

The compact design of the solenoid and decoder is ingenious but I wish marklin made an adapter to have a larger solenoid mounted under the layout.
I haven't tried the Viessmann 4554 it might be more reliable but it is still mounted directly to the underside of a C-track turnout.

I also would like to know if there is a good lubricant that can be used in the solenoid I think most oils would gum it up, so a dry Teflon lubricant might be better.

Seems to be a good solution, but it shouldn´t be needed from the beginning. What about QC Märklin? But I´ll propably continue my solution. Strangely I haven´t been having any problems with the original motor in my 24624.