Marklin 37342-01 SBB Swiss Re 4/4 mFx loco

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Marklin 37342-01 SBB Swiss Re 4/4 mFx loco - DOA on arrival

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Paul187		#1 Posted : 29 May 2025 10:31:48(UTC) Retweet
Joined: 09/11/2021(UTC) Posts: 20 Location: New Jersey		Hello: I am not that familiar with some of the newer MFX locos. I purchased this as used. However, the loco looks to have never been used. I am using the Marklin 6647 transformer which the loco should recognize. The loco seems dead. No response at all. There is a jumper plug inside for track or catenary. Plug is set for track. I thought perhaps stale grease/oil syndrome but the motor truck seems unobstructed. Interior is factory fresh. No loose circuit boards or wires. No hum or lights when power is applied. Any ideas??? Thank you, Paul


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JohnjeanB		#2 Posted : 29 May 2025 11:39:28(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,564 Location: Paris, France		Hello Paul Searching for loco 37342 in Märklin webbase I could not find it. Apparently, it was released in 2009 as a special edition set of two Re 4/4 II (one red one green). When installing a recent Märklin digital model and powering with a transformer it should light up and start. What can be wrong: - motor seizure (blocked by dry oil. DO NOT try to unlock it by forcing the wheels to turn - recent locos slider is clipsed (and not attached with a screw) so an improperly clipsed slider may prevent any operation - the decoder is dead (may die using an old transformer with a direction change - overvoltage higher than 25 VAC) Seizure is one the favorites (most likely) - remove the brushes - check for wheel seizure (move laterally / rotate Does it move a little?) - worst is to have to open the motor (coffee grinder / HDLA in your case) This maybe could help Cheers Jean
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mike c		#3 Posted : 29 May 2025 17:56:05(UTC) Retweet
Joined: 28/11/2007(UTC) Posts: 8,234 Location: Montreal, QC		Hi Paul, Can you take a photo of the model with the shell removed? As there are no lights when the model is given power, this should rule out a seized motor or brush issue. This was one of the last models with the OEM ESU decoder. It is possible that the decoder is damaged/dead. It was also one of the first models to have the rail/catenary switch replaced with jumpers on the circuit board. Personally, I was not satisfied with the error in the production which resulted in the model having the shortened cab railings like the Re 421 instead of the complete railings of the Re 4/4II (420). I took the digital chassis from both locomotives and used them to upgrade two earlier models to digital and sold the 37342 shells with the analog chassis from the older models. At the time, it was clearly expressed that the chassis was from 3434/34344 type models. If your model has the ESU decoder and jumpers, you did not end up with one of those particular models. My first suggestion would be to ask how far you are from Euro Model Trains and whether you can have Mike take a look at it. Alternately, you can contact Robert at RJF Trains in Katonah, NY. They may have the ESU decoder tester which can be used to check the decoder. I am not certain if the current Maerklin tester will work on the older OEM ESU models. If you have a similar Re 4/4II (37356/26534), you can carefully swap decoders to test the motor/lights. I suspect that the issue is likely decoder related. Regards Mike C

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rhfil		#4 Posted : 29 May 2025 19:56:42(UTC) Retweet
Joined: 05/09/2014(UTC) Posts: 678 Location: NEW HAMPSHIRE, Somersworth		Don't like those plugs. Remove it and reinstall it. Try different positions. Use a multi-meter to see if there is resistance between the slider and the wheels. If there is none it means no power is getting through so either there is a bad connection or a bad decoder. I would even move the plug to the catenary position and check everything again. Don't like those plugs.

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Paul187		#5 Posted : 29 May 2025 21:05:00(UTC) Retweet
Joined: 09/11/2021(UTC) Posts: 20 Location: New Jersey		Hello: Here are pics of the loco. Thank you, Paul


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Dave Banks		#6 Posted : 30 May 2025 03:14:15(UTC) Retweet
Joined: 08/03/2006(UTC) Posts: 1,043 Location: Gold Coast, Australia.		This is about as close to that loco as I can find: https://static.maerklin....9dcad7b3b11434542188.pdf
		D.A.Banks


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