Märklin conversion sets for Large Flat Collector Motors (LFCM)

Updated 07.06.2013

The LFCM is recognized by one carbon brush and one copper brush, connected to a flat collector.  The motor cover is rather big, and comes in two versions, with different motor covers.  The two different motor covers, as well as two different rotors, comes with the conversion sets.

In a locomotive it may look like this:

This is the original LFCM in a Märklin 3068 locomotive.  The motor from a 609?4 conversion set will not fit directly with this motor.

See the conversion of my Märklin 3068 NSB Di3a 3.641

The conversion sets:
There have been three different conversion sets for locomotives with the LFCM motor.
Set motor decoder Remarks
60904 5-pole
high power
motor
c91 No longer produced by Märklin
60924 mfx
60944 none A decoder must be bought separately
The three conversion sets are identical when it comes to the five-star high power motor itself.  The big difference is the digital decoder.

The c91 decoder in 60904:

This photo shows the c91 decoder without it's plastic cover.  The lamp on the top does not belong to the decoder.

In the 60904 it was (not produced anymore) a so called c91 decoder, with a row of eight switches (so called Mouse Piano) to set the decoder address and two potentiometers to adjust the maximum locomotive speed and the acceleration/deceleration time.  The decoder receives data from the digital train controller, one way communication only.  With a Märklin control device you may select between 80 locomotive addresses.  The decoder dimensions are 36 x 21x 9 mm.  If required, it fits into a holder 258820.

The mfx decoder in 60924:

In the 60924 conversion set we find a mfx decoder.  It means, among others, that the decoder is adjusted from outside, from the train controller.  You can set a lot of things, like the address (if you use a Delta controller or the 6021 Control Unit), the maximum speed, which can be set rather accurate, the acceleration and deceleration time can be set individually and you have some control of the different functions of the decoder.
If using The Märklin Systems, either with the Mobile Station or the Central Station, the decoder is reporting itself to the control system, two way communication.  It is not necessary to set an address. The decoder dimensions are 22,3 x 15,5 x 5,5 mm.  If required, it fits into a holder 456200.  This decoder is wrapped into a sort of rubber tube in the conversion sets.

The Märklin conversion sets 60904 and 60924 are no longer available from Märklin, and are replaced by a separate motor set and a choice of separate decoders.

The new motor conversion set, 60944:
The conversion set 60944 is the motor and small parts only.  I think these parts are identical to the motor parts from 60904 and 60924, but I have not seen them yet.  The decoder of your choice must be bought separately.  There are four different decoders types to choose from:

The new decoders:
60942, mLD, multi protocol decoder (mfx, MM1, MM2 and DCC) with an amplifier board, six function outputs
60962, mLD, multi protocol decoder (mfx, MM1, MM2 and DCC) with wires and an 8-pole NEM connector, four function outputs
6094?, mSD, multi protocol sound decoder (mfx, MM1, MM2 and DCC) with an amplifier board, six function outputs and speaker
6096?, mSD; multi protocol sound decoder (mfx, MM1, MM2 and DCC) with wires and an 8-pole NEM connector, four function outputs and speaker

The sound decoder's number last digit: 5 is for steam engines, 6 is for diesel and 7 is for electric locomotives.
The mSD decoders 60948 and 60949 has special amplifier boards suited for the 36-series Hobby locomotives with bogies.  60948 for diesel engines and 60949 for electric engines.
The mSD decoder 60940 has a 21 pole mtc connector, to fit into locomotives with a factory fitted mtc21 amplifier board.

See this Märklin web site for detailed information.

Märklin 60904, 60924 and 60944 consists of a number of parts:
Part name Pcs. Part number
60904 60924 60944
Decoder, c91 with DIP-switches 1   - 603617
or 60902
Decoder, mfx   1 - 611298
or 60922
Rotor, 7 teeth gear 1 1 1 214118
Rotor, 8 teeth gear 1 1 1 210888
Field magnet 1 1 1 210882
Motor cover, MS 1 1 1 1 210881
Motor cover, MS 2 1 1 1 214121
Brushes 2 2 2 601460
Noise suppressor (inductor) 2 2 2 516520
Screw M2,5x12 2 2 2 785140
Screw M3x12 2 2 2 748810
Bulb socket 2 2 ? 276770
Bulb 22 Volt 2 2 ? 610080
Soldering lug 1 1 1 231470
Capacitor 2     600760
Rubber tube 2 2 2 787570
Decoder adjustment tool 1     610080 The photo shows the parts that came with the 60924 set (60904 had a different decoder), like the screws, the bulbs and bulb holders, noise suppressors (inductors) and rubber tubes.  The brushes for the motor and a soldering lug for ground connection also comes with the set.
I am sure about the bulb sockets and the bulbs in the 60944 set.
Manual 1     608899
  1   611488
    1 179259
No warranty for correctness!

Installation in a locomotive:
A number of locomotives may be converted without any problems, but some require additional work.  If you have some mechanical and soldering skills, it is normally no problem to install the conversion set into a locomotive.  The locomotive must of course be in a good mechanical condition prior to the conversion.  If you don't have the skills yourself it is recommended to leave the work to professionals, like your Märklin dealer or the Märklin Repair Service in Göppingen, Germany.

This is a list compiled from different websites:
Märklin number Locomotive type Rotor teeth Motor cover Remarks
3009
3027
3047
3108
DB series 44 7 MS 1  
3004 DB series 80 7 MS 1  
3007 DB series 06 7 MS 1  
3011 DB E 44 7 MS 1  
3012
3013
 SNCF10000
NS 1100
7 MS 1  
3046 SNCF 150 X 7 MS 1  
3014 SBB Re 4/4 7 MS 1  
3050
3350
SBB Ae 6/6 8 MS 2  
3071 SBB/NS Ram 500 8 MS 2  
3022
3052
3159
3300
3322
DRG E 94
DB 194
8 MS 2  
3023
3024
 DRG E 18 7 MS 1  
3041
3043
ÖBB 1043
SJ RC
8 MS 2 Later models have DCM
3045 DSB N 7 MS 1  
3051
3055
3161
3168
NS 1200 8 MS 2  
3072
3147
3772
and derivates
DB V 100
DB 212
8 MS 2 Later models have DCM
3021
3081
3184
3921
DB V 200 7 MS 1  
3073 BR Warship Class 7 MS 1  
3053
3054
DB E 03
DB103
8 MS 2 Later models have DCM
3074
3075
3774
DB 216 8 MS 2 Guide pin on field magnet must be shortened
Later models have DCM
3096
3100
3112
3113
and derivates
DB series 86 8 MS 1  
3063
3066
3067
3068
3173
3143
and derivates
CFL 1600
DSB MX, MY
NSB Di3a, Di3b
SNCB 204
8 MS 2 Early models may have a motor that
does not fit, see photo on top of page

Later models have DCM
3083
3091
3092
3093
3111
S 3/6
SNCB Series 59
8 MS 1 Requires a motor cover modification
for the body to fit over the motor

The decoder functions:
Function Direction 60904 60924 Remarks for 60924
f0 forward yes, changing with direction On the mfx decoder in 60924 these selections
can be done with the Central Station 60212 or newer.
In addition to the acceleration and braking delay,
this decoder also have a shunting speed
setting, normally also controlled with f4.  This
may be set to e.g. f3 with the Central Station.
Also the output type and intensity can be
selected, like light, flashing light, smoke unit etc.
reverse yes, changing with direction
f1 forward yes yes,
one direction only and/or
on/off with start or stop
may be selected.
reverse
f2 forward yes
reverse
f4 forward acceleration and
braking delay cancelled
Shunt speed and
delay may be separated
reverse

A Central Station screenshot:

The left half shows an mfx decoder, identical to the one in the 60924 set, the right half shows a c91 decoder, like the one in 60904.  The different functions are indicated far left and far right in the picture.  From the top we have f0, front head lamps, f1, for instance interior light front end, f2, for instance Telex rear end, f3, shunting speed (not on the c91) and f4, cancelling the acceleration and the deceleration delay.  The function order and position (which key to press) may be altered with the mfx decoder, but are fixed with c91 decoder.

Installation in a locomotive

A number of locomotives may be converted without any problems, but some require additional work.  If you have some mechanical and soldering skills, it is normally no problem to install the conversion set into a locomotive.  The locomotive must of course be in a good mechanical condition prior to the conversion.  If you don't have the skills yourself it is recommended to leave the work to professionals, like your Märklin dealer or the Märklin Repair Service in Göppingen, Germany.

Some photos from the installations:

Newer Märklin 3068NSB Di3b motor, using the 60924 conversion set:

The photo shows motor cover MS2

3071 SBB/NS Ram 500 motor, using 60904 conversion set:

The photo shows motor cover MS2

3772 DB 212 motor, using 60904 motor parts, and 60932 mfx sound decoder:

The photo shows motor cover MS1

There are many internet sites regarding this kind of conversions and how to solve the difficulties.  Just search for Märklin 60904, 60924 or 60944 conversion.

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