This is a sequence of photographs showing how I installed an ESU LokPolotDCC decoder into my Märklin 3048 steamer that has the old motor type with the large flat commutator. Also shown is the relay I added for the smoke unit.
3048 Loco made in the mid 1960s, ESU LokPilotDCC Decoder and HAMO magnet are ready to be united. HAMO magnet is from ESU part number 51960
Old mechanical reversing mechanism that will be replaced by the decoder
Motor cover is now off and reveals a filthy interior made up of carbon dust, old oil and dirt
Rotor and motor cover have now been cleaned with rubbing alcohol
Get it really nice and clean !
The 3 pole rotor is pretty worn but I do not have a replacement
The new permanent magnet fits perfectly
The light and smoke unit were electrically coupled and I want to be able to switch the light and smoke unit independently
The old parts of the light holder in exploded view show how the base of the smoke unit contact touched the light bulb socket
By inserting some insulation (from an old M-Track turnout) between the light socket and the smoke unit contact I can deliver power to each independently
The light fixture with my additional insulation in place
The new decoder as it comes. I cut off the plug.
After lubricating the gears, the new magnet is put in place, then the clean rotor and then the motor cover holds it all in place.
The decoder has now replaced the old reverser and is wired up. The black tape is holding the unused wires out of the way.
Motor wiring is in place
In order to use the original analog smoke generator, I install a relay on F1 such that the function switches the relay and the relay switches the track voltage to the smoke unit.
The relay is ready to be installed (12V DC)
Relay is now installed
Housing is back on, loco is tested and runs fine.
The actual speed curve as measured by my calibration software