I have a friend that needs a motor for an Aristo GP40. I think his loco still has the original GP40 motors that were subject to smoking and burnout. Anyone know if the replacement motors are available and where?
Aristo GP40 motors
Paul Burch
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I have a friend that needs a motor for an Aristo GP40. I think his loco still has the original GP40 motors that were subject to smoking and burnout. Anyone know if the replacement motors are available and where?
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It's not... the standard motor block is used in the FA-1, and similar locos.
The "prime mover" "modular" gearboxes are used in the 3 axle diesels and the GP40, as well as most of the steamers.
These motors have a hex drive, no gear on them.
But, since the Dash9 has been re-issued, perhaps the motors from a Dash9 will fit. There is some extra room in the GP40 blocks that can easily accomodate a longer motor, opening the block will demonstrate that.
Greg
The "prime mover" "modular" gearboxes are used in the 3 axle diesels and the GP40, as well as most of the steamers.
These motors have a hex drive, no gear on them.
But, since the Dash9 has been re-issued, perhaps the motors from a Dash9 will fit. There is some extra room in the GP40 blocks that can easily accomodate a longer motor, opening the block will demonstrate that.
Greg
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Thanks Greg,
Bachmann is showing the GP40 on their website with a "coming soon". They most likely will have the motors at that time ? In the meantime, I do have a couple of the old style motors that I kept from when I swapped out all mine with new motors years ago. Most likely I will use one of them for a temporary fix until the motors are available from Bachmann. I was hoping there might be some of the motors still out there. Still hoping.
Bachmann is showing the GP40 on their website with a "coming soon". They most likely will have the motors at that time ? In the meantime, I do have a couple of the old style motors that I kept from when I swapped out all mine with new motors years ago. Most likely I will use one of them for a temporary fix until the motors are available from Bachmann. I was hoping there might be some of the motors still out there. Still hoping.
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Or anybody with a broken GP40 with a good motor block?
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I would bet that the only the motorblock as a whole will be sold.
I'm taking a clue from the Dash 9, only the motorblock complete is offered.
![Image]()
I'm taking a clue from the Dash 9, only the motorblock complete is offered.
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4trackrr.store has the motors and hex fittings for the GP40's. They are now at a friends house waiting for me to pick up the loco and motors and make the repair. I may have an update on this later as the loco in question appears to have the new motors. This is a bit concerning. I have not heard about any of the new motors burning out.
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the old motors were shorter than the compartment, and there is a small finger/blade of plastic making the shorter motor fit.
The correct motors require you to remove the finger/blade and then the right motor fits.
This will allow you to know the right motors.
(the motor block was designed to fit the right motor, and when the motors were received, and were shorter, the finger/blade added.
Greg
The correct motors require you to remove the finger/blade and then the right motor fits.
This will allow you to know the right motors.
(the motor block was designed to fit the right motor, and when the motors were received, and were shorter, the finger/blade added.
Greg
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Greg,
I have done quite a few of these conversions through the years. The loco in question was one of mine that I sold to a friend. It has the newer motors. I will know more this next week when I will have it here for repair and can confirm that it is a bad motor.
I have done quite a few of these conversions through the years. The loco in question was one of mine that I sold to a friend. It has the newer motors. I will know more this next week when I will have it here for repair and can confirm that it is a bad motor.
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interesting. To confirm, did you replace the original motors or did it come with the new motors.
If it came with the new motors, how did you confirm they were the "new" type? I've had a number of people who were assured they were "new" motors and they were the original, counterfeit ones. I think that several dealers/distributors were not given the truth.
The only way to tell is the length of the motor.
Greg
If it came with the new motors, how did you confirm they were the "new" type? I've had a number of people who were assured they were "new" motors and they were the original, counterfeit ones. I think that several dealers/distributors were not given the truth.
The only way to tell is the length of the motor.
Greg
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Greg,
You can tell old from new visually. Look at Ted's how to replace the old motors. Part way down there are photos of old and new. On the old ones you can see a visible white piece of plastic if you look in the side opening on the motor. Not there on the new ones. It is visible on an installed motor. I don't remember on the loco in question if it came with old or new. I will get back after I get it inspected and fixed. By the way, it is the SF unit with the detailed Ce-8 caboose that I really wanted you or Ted to buy.
![Image]()
![Image]()
You can tell old from new visually. Look at Ted's how to replace the old motors. Part way down there are photos of old and new. On the old ones you can see a visible white piece of plastic if you look in the side opening on the motor. Not there on the new ones. It is visible on an installed motor. I don't remember on the loco in question if it came with old or new. I will get back after I get it inspected and fixed. By the way, it is the SF unit with the detailed Ce-8 caboose that I really wanted you or Ted to buy.
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OK, still confused...
Picture of new motor, only white plastic I see on the "side" would be the ventilation opening with the white fan on it...
Are you referring to what is seen below? (3rd picture down)?
![Image]()
Picture of new motor, only white plastic I see on the "side" would be the ventilation opening with the white fan on it...
Are you referring to what is seen below? (3rd picture down)?
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Greg,
About half way down Ted's instructions there is a side motor photo with blue tape on it that says bad motor. You can clearly see white plastic inside the hole on the side. Right below that is a photo of a new motor without that white plastic. Aristo GP40 Problems - Smoking Motors & Debilitated Wheels (elmassian.com)
About half way down Ted's instructions there is a side motor photo with blue tape on it that says bad motor. You can clearly see white plastic inside the hole on the side. Right below that is a photo of a new motor without that white plastic. Aristo GP40 Problems - Smoking Motors & Debilitated Wheels (elmassian.com)
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this picture, right? (1st picture)
![Image]()
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Greg,
Those are the ones. Every GP40 that I changed motors in had motors that looked like the first photo.
Those are the ones. Every GP40 that I changed motors in had motors that looked like the first photo.
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Good, I congratulate you on a "spotting guide" so that people will not have to open the motor block to tell which motor is installed.
Seems the 2nd run of GP40s had the correct motor (as far as matching the intended size).
What is disturbing is the reports of even the new motors having some failures. Ted has reported to be one of that group, and actually the loco in the vignette.
Greg
p.s. Ted has informed me that the Dash 9 motors are shorter/smaller so they would not be a drop in replacement.
Seems the 2nd run of GP40s had the correct motor (as far as matching the intended size).
What is disturbing is the reports of even the new motors having some failures. Ted has reported to be one of that group, and actually the loco in the vignette.
Greg
p.s. Ted has informed me that the Dash 9 motors are shorter/smaller so they would not be a drop in replacement.
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Greg,
I should know sometime tomorrow if the motor is bad. And from what you say there have been some failures with the new motors.
I should know sometime tomorrow if the motor is bad. And from what you say there have been some failures with the new motors.
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Greg,
Fixed the GP40 today. Bad newer type motor. After it was removed I tested it with a power supply. Slow motor speed ok. Lots of sparks from brushes at higher voltage. It would also momentarily jerk to an instant stop and they start again. Like it hit a mechanical snag. Looking at it with a flashlight it looks like the brushes are wearing uneven. Can't say for sure without tearing the motor apart. In any case it looks to me like that is where the problem is located. I wonder what motor Bachmann is going to use in the new run of the GP40? Something they should probably know about. Greg, did Ted say what he found on his bad motor?
Fixed the GP40 today. Bad newer type motor. After it was removed I tested it with a power supply. Slow motor speed ok. Lots of sparks from brushes at higher voltage. It would also momentarily jerk to an instant stop and they start again. Like it hit a mechanical snag. Looking at it with a flashlight it looks like the brushes are wearing uneven. Can't say for sure without tearing the motor apart. In any case it looks to me like that is where the problem is located. I wonder what motor Bachmann is going to use in the new run of the GP40? Something they should probably know about. Greg, did Ted say what he found on his bad motor?
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Have not asked, but he did not tear it apart... pretty sure inferior insulation on the windings.
Maybe if he still has the motor, I can dissect it... .I'll ask. Counterfeit for sure though, poorly reproduced printed logo and wrong size for the part number specified.
Greg
Maybe if he still has the motor, I can dissect it... .I'll ask. Counterfeit for sure though, poorly reproduced printed logo and wrong size for the part number specified.
Greg
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Greg,
I had the motor out of the loco when I tested it. The brushes were really sparking at I'm guessing about 10-12 volts.
I had the motor out of the loco when I tested it. The brushes were really sparking at I'm guessing about 10-12 volts.
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