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Offline gachar001  
#1 Posted : 01 March 2021 05:12:48(UTC)
gachar001

India   
Joined: 29/04/2008(UTC)
Posts: 1,391
Location: Chennai
My 37993 Big Boy has an issue. It will not move.
When I packed it up in the US it was working fine. Then it sat in boxes for a few years. Now when I start the loco, all the functions like sound, lights etc. work just fine but the loco just does not move. I don't even hear any humming from the motor (so it is not like some jamming issue). And opening up that loco is a very daunting task. I wouldn't even know where to start to check if some wire has come loose.
Any tips or pointers on how I can begin trouble shooting this?
Gautham
Atlanta, GA USA
Offline foumaro  
#2 Posted : 01 March 2021 08:24:45(UTC)
foumaro

Greece   
Joined: 08/12/2004(UTC)
Posts: 4,328
Location: Attiki Athens Greece
Check the wires form the decoder to the motor,they are usually blue and green.You can find a similar topic to the forum about a BR10 37082.I hope you are so lucky as our friend Thom.
thanks 2 users liked this useful post by foumaro
Offline klarinettmeister  
#3 Posted : 01 March 2021 14:22:34(UTC)
klarinettmeister

Sweden   
Joined: 13/02/2008(UTC)
Posts: 771
Location: Kirseberg
Hi!
Try pulling the front boogie. If it's lose its probably the screw connecting the boogie with the frame that's loose. If that's happened the cardan could have come loose and could jam the transition.

thanks 2 users liked this useful post by klarinettmeister
Offline JohnjeanB  
#4 Posted : 01 March 2021 14:38:21(UTC)
JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 1,432
Location: Paris, France
Hi Thom
To open the Big boy is rather simple
Big Boy.png
It all takes place in the red frames above:
* remove the decoration plastic part
* remove the screw

Then you have access to the motor.
Check if:
* the mechanism is seized
* the motor rotates freely
* no wires are cut

If for any reason you remove the motor, be sure, when placing it back that there is the same play on transmission rods on both sides.
Cheers
Jean
My layout videos
latest vid
hump yard
thanks 1 user liked this useful post by JohnjeanB
Offline gachar001  
#5 Posted : 04 March 2021 06:43:15(UTC)
gachar001

India   
Joined: 29/04/2008(UTC)
Posts: 1,391
Location: Chennai
Originally Posted by: klarinettmeister Go to Quoted Post
Hi!
Try pulling the front boogie. If it's lose its probably the screw connecting the boogie with the frame that's loose. If that's happened the cardan could have come loose and could jam the transition.




If that is the case I should hear the motor trying to hum or something. But there is no sound from the motor. I will check the wires first
Gautham
Atlanta, GA USA
Offline gachar001  
#6 Posted : 04 March 2021 06:44:51(UTC)
gachar001

India   
Joined: 29/04/2008(UTC)
Posts: 1,391
Location: Chennai
Originally Posted by: JohnjeanB Go to Quoted Post
Hi Thom
To open the Big boy is rather simple
Big Boy.png
It all takes place in the red frames above:
* remove the decoration plastic part
* remove the screw

Then you have access to the motor.
Check if:
* the mechanism is seized
* the motor rotates freely
* no wires are cut

If for any reason you remove the motor, be sure, when placing it back that there is the same play on transmission rods on both sides.
Cheers
Jean


Thank you Jean. This really helps.

Gautham
Atlanta, GA USA
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