Bachmann Class 66 motor

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triuph1050
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Joined: Wed Jul 25, 2018 12:08 pm

Bachmann Class 66 motor

Postby triuph1050 » Wed Nov 28, 2018 9:37 am

Hi people, any help please. As you can see by the pictures, I have a motor were 'both' the wires have come off. Can not see any sign of where they were attached to and it seems that if its only used for DCC theres no need for the interference suppressor capacitors so that would make it simple to solder back on what do you think?
Image20181127_224749_HDR by peter, on Flickr
Image20181127_224759_HDR by peter, on Flickr
Image20181127_224838_HDR by peter, on Flickr

Bigmet
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Joined: Tue Aug 14, 2007 2:19 pm

Re: Bachmann Class 66 motor

Postby Bigmet » Wed Nov 28, 2018 10:25 am

The bottom picture of the three you have posted shows very clearly what you need to know.

First unsolder all three capacitors, not required for DCC. That will make it clear that there are a pair of brass strips from the brass brush caps which are left and right in the picture: the brass strip from the right hand brush cap lying on top, the brass strip from the left hand brush cap concealed underneath. Solder one motor supply wire (orange and grey) to each strip and you are done. (No need to worry about 'correct' connection if your DCC controller allows you to access CV29, which will programme reverse direction if the loco runs 'wrong way''. If you cannot access CV29, then reversing the motor connections will fix this. Something of a chore to get access but easy enough for someone who has already stripped down the mechanism.)

This is pretty much a generic arrangement for all can motors, so having seen one, you have seen them all!

triuph1050
Posts: 84
Joined: Wed Jul 25, 2018 12:08 pm

Re: Bachmann Class 66 motor

Postby triuph1050 » Wed Nov 28, 2018 12:37 pm

Thanks Bigmet
I know which way round the wires go thanks, as one is longer to go under the motor, in this case there red and black. Honest I barely moved the pcb board to get to the drive shaft and the buggers came off :(
Cheers Peter

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Bufferstop
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Re: Bachmann Class 66 motor

Postby Bufferstop » Wed Nov 28, 2018 12:47 pm

Something like this
Motor Wires.jpg

The brush connections on this type of motor are diametrically opposite each other. If the component sitting over the top LH corner is a capacitor you have lost a wire which went to the top RH corner, if it is an inductor (choke) then the missing wire went to the leg nearest the camera, but without the component the wire goes to top RH. It looks to have had a soldering iron applied to it already as the lead seems to be molten into plastic covering.
As the mechanic said "Thats not £100 for 'itting it wi' ommer, £99.99 is for knowing where to 'it t' beggar.
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GWR_fan
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Re: Bachmann Class 66 motor

Postby GWR_fan » Wed Nov 28, 2018 10:07 pm

[quote="Bufferstop"....................As the mechanic said "Thats not £100 for 'itting it wi' ommer, £99.99 is for knowing where to 'it t' beggar.[/quote]

In the aviation industry it is known as a "technical tap". We had a supervisor well versed in the use of this piece of technical equipment, known as Harold the hammer.

triuph1050
Posts: 84
Joined: Wed Jul 25, 2018 12:08 pm

Re: Bachmann Class 66 motor

Postby triuph1050 » Wed Nov 28, 2018 11:00 pm

Well that was fun and yes had to do it twice as I was wrong as to which wire went where, but in the end very happy to report that I have all my 66s back on shed :)
So no problems with running after removing these bad boys. Thanks for the advice peeps
Peter
Image20181128_222517_HDR by peter, on Flickr
Image20181128_224213_HDR by peter, on Flickr

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Bufferstop
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Location: Bottom end of N. Warks line

Re: Bachmann Class 66 motor

Postby Bufferstop » Wed Nov 28, 2018 11:45 pm

There was always the 50% chance you'd get the wires the wrong way round first time.
Growing old, can't avoid it. Growing up, forget it!
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