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Offline Hackcell  
#1 Posted : 23 October 2015 21:05:07(UTC)
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Hackcell

Costa Rica   
Joined: 21/11/2013(UTC)
Posts: 521
Hello,

What motor is good enough to replace the 216907 motor which is included on the 37991 BB locomotive? Somebody is selling one of these models without the motor on a very cheap price, however I want to put a quality motor inside as I couldn't locate online the original motor and I don't want to use the cheap motor.

Thanks.
Danilo Jiménez
Union Pacific and DB Cargo H0 models.
Märklin, Brawa, MTH and some Walthers cars (nobody is perfect!)
Pinball machines, jukeboxes and Horses.
Costa Rica, pura vida!!
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Offline tfk  
#2 Posted : 23 October 2015 22:52:02(UTC)
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tfk

Netherlands   
Joined: 18/10/2015(UTC)
Posts: 17
Location: Somewhere in the Netherlands
That's the big boy isn't it?

http://www.maerklin.de/s...&artikelnummer=37991

This one has a can motor in it. See the following link.

http://www.marklin.com/bigboy/

Here are some pictures:
http://wiki.3rail.nl/ind...%A4rklin_Klokanker_Motor

I would go for the original set-up as the decoder may only know about this type of motor. Secondly, on this locomotive eight axles are driven via cardan shafts. So the whole set-up is built around this type of motor. Also realise that this big locomotive may need all those axles to be powered to perform correctly. The marklin.com link mentions the flywheel which smooths out some imperfections in performance using kinetic energy and helps the locomotive overcome power gaps.

So my advice is to check what parts are missing and try to find out what the costs are to put everything back together. When the total costs are higher than the price of a pristine one, don't do the deal.

Hope this helps.
TFK
TFK
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Offline H0  
#3 Posted : 23 October 2015 23:39:45(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,432
Location: DE-NW
Hi!
Originally Posted by: tfk Go to Quoted Post
This one has a can motor in it.
Big Boys up to 37793 had the "high-efficiency can motor with a bell-shaped armature" aka coreless motor.
Starting with the 37794 the motor is no longer coreless, the armature is no longer bell-shaped.

Danilo is trying to find one of those coreless motors.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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Offline Hackcell  
#4 Posted : 23 October 2015 23:45:18(UTC)
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Hackcell

Costa Rica   
Joined: 21/11/2013(UTC)
Posts: 521
Exactly! Or a extremely good replacement :-)
Danilo Jiménez
Union Pacific and DB Cargo H0 models.
Märklin, Brawa, MTH and some Walthers cars (nobody is perfect!)
Pinball machines, jukeboxes and Horses.
Costa Rica, pura vida!!
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Offline H0  
#5 Posted : 23 October 2015 23:48:58(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,432
Location: DE-NW
Originally Posted by: tfk Go to Quoted Post
I would go for the original set-up as the decoder may only know about this type of motor.
Good point. The old decoder has DIP switches and was optimized for coreless motors. This could lead to problems with the new type of motor.
The DIP switches are no problem by themselves, but those decoders do not have CVs that allow adjustment to a different motor type.

Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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Offline Hackcell  
#6 Posted : 24 October 2015 00:43:53(UTC)
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Hackcell

Costa Rica   
Joined: 21/11/2013(UTC)
Posts: 521
Originally Posted by: H0 Go to Quoted Post
Originally Posted by: tfk Go to Quoted Post
I would go for the original set-up as the decoder may only know about this type of motor.
Good point. The old decoder has DIP switches and was optimized for coreless motors. This could lead to problems with the new type of motor.
The DIP switches are no problem by themselves, but those decoders do not have CVs that allow adjustment to a different motor type.



Based on the price I'm getting for this loco, I have no problems installing a newer decoder. What it really concerns me is to have a reliable engine as the one originally installed.

Far as I've heard the newer decoders installed on the BBs (37994, 37995) are a joke compared with the old ones.
Danilo Jiménez
Union Pacific and DB Cargo H0 models.
Märklin, Brawa, MTH and some Walthers cars (nobody is perfect!)
Pinball machines, jukeboxes and Horses.
Costa Rica, pura vida!!
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Offline H0  
#7 Posted : 24 October 2015 08:28:56(UTC)
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H0


Joined: 16/02/2004(UTC)
Posts: 15,432
Location: DE-NW
Originally Posted by: Hackcell Go to Quoted Post
Far as I've heard the newer decoders installed on the BBs (37994, 37995) are a joke compared with the old ones.
With respect to decoders there is more than just "old" and "new".
The 37990 had two decoders for a total of about 9 functions. Probably the Big Boy with the worst sound.
37991 and early batches of 37993 have ESU mfx decoders. IMHO the best sound versions of the Big Boy Märklin made so far.
Late batches of the 37993 and the 37994 have crippled versions of the MSD and IMHO the sound is notably worse then the earlier mfx generation.
The crippled MSD does not handle the dynamo sound correctly and in the factory configuration you cannot run the Big Boy with lights on, but without dynamo sounds.
With the ESU version the dynamo sound is only on when the chuff-chuff sound is also activated.

I wouldn't call the new decoders a joke, but they are a regression. Same price, decoder is notably worse, motor is notably louder. They did these cost-optimizations not just with their flagship model Big Boy, but also with other models. Good bye, pre-orders. Hello, eBay ...
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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Offline Hackcell  
#8 Posted : 24 October 2015 09:01:05(UTC)
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Hackcell

Costa Rica   
Joined: 21/11/2013(UTC)
Posts: 521
Originally Posted by: H0 Go to Quoted Post
Originally Posted by: Hackcell Go to Quoted Post
Far as I've heard the newer decoders installed on the BBs (37994, 37995) are a joke compared with the old ones.
With respect to decoders there is more than just "old" and "new".
The 37990 had two decoders for a total of about 9 functions. Probably the Big Boy with the worst sound.
37991 and early batches of 37993 have ESU mfx decoders. IMHO the best sound versions of the Big Boy Märklin made so far.
Late batches of the 37993 and the 37994 have crippled versions of the MSD and IMHO the sound is notably worse then the earlier mfx generation.
The crippled MSD does not handle the dynamo sound correctly and in the factory configuration you cannot run the Big Boy with lights on, but without dynamo sounds.
With the ESU version the dynamo sound is only on when the chuff-chuff sound is also activated.

I wouldn't call the new decoders a joke, but they are a regression. Same price, decoder is notably worse, motor is notably louder. They did these cost-optimizations not just with their flagship model Big Boy, but also with other models. Good bye, pre-orders. Hello, eBay ...


Hello,

Mistype error, I meant the motors, not the decoders.

Danilo Jiménez
Union Pacific and DB Cargo H0 models.
Märklin, Brawa, MTH and some Walthers cars (nobody is perfect!)
Pinball machines, jukeboxes and Horses.
Costa Rica, pura vida!!
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Offline biedmatt  
#9 Posted : 24 October 2015 13:04:28(UTC)
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biedmatt

United States   
Joined: 09/04/2012(UTC)
Posts: 1,343
Location: Southwest Ohio
Based on the conversation, it sounds like M no longer offers the original motor for replacement, which would explain the great price. Perhaps the only option is SB-Modellbau. They offer Maxon and Fahlheber motor kits to replace original motors. They do not show one for the BB, but I'm sure they would like a crack at one. I've remotored about a dozen of my sinus drive lokos. The kits and motor are first class and run even better than the sinus drive did.

http://www.sb-modellbau.com
Matt
Era 3
DB lokos, coaches and freight cars from across Europe
But I do have the obligatory (six) SBB Krocs
ECoS 50200, all FX and MFX decoders replaced with ESU V4s, operated in DCC-RailCom+ with ABC brake control.
With the exception of the passenger wagens with Marklin current conducting couplers, all close couplers have been replaced with Roco 40397.
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