Can you repair a "sealed" class 47 motor?

[Badgercote]

The Hornby part number for the whole bogie and motor is X9769 and on the leaflet is called a "sealed, long life,5 pole motor which requires no maintenance."

It easily pops out of the loco housing and reveals two small recessed screws at the top of the motor housing, but before I do anything stupid do any of you have any experience with taking such a thing apart?

The reason for asking is that the loco was running ok yesterday then it started slowing up and eventually stopped altogether. No amount of cajoling would get it to start again.

I did some continuity tests with my meter and all seems ok there. Later on I put 12 volts to the wheels and they spun for a few seconds then stopped dead again. It's as though the motor is locking up inside.

I lubricated the wheels so I know they are ok.

Any ideas please.

[Tony57]

Hi

The motor will be ok but the carbon brushes would have worn away. Normally the situation would be get a replacement motor.  Try looking at removing the srews to see if it can be taken apart. Have not got a clue about getting replacement carbon brushes.  

[Fazy]

I'm going to presume you have already checked all wheels and pickups track and wires are in good condition and clean. 

 

And really is the motor. The simple answer is buy a new one.  The long answer is without seeing the motor is maybe. 

 

I had a matsumi motor winch I dropped and knock off one contact.  Or so I thought. I opened the motor up which no screws, but to bits of metal bent over which needed steighting the back comes of with a washer. You'll find a brass plate which wraps round the mine motor and will have the carbon brushes on it. They will probably be ether sitting in a small hole. Either glued are hold in  by a pre sprung bit of the plate. If you get this far take photos and study how it all comes apart. 

Now I opened it up to redo the contacts.  Which just had sprung inside.  However the brush sprung of  so I had to this

 

The brushes are going to be the problem getting.  I sharpened a H pencil glue the lead in place.  Let it dry cut the pencil of from the back.  So just leaving a makeshift carbon brush.  Repeat for the other side. The trick is to glue it in but making sure it still in contact with the brass plate. Reassemble. 

Mine still works after 2 years. But this is no guarantee.  Has once you open it up. The motor my be different.  And you'll need to have a feather touch.  

[Fazy]

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[Fazy]

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[Wobblinwheel]

Try LaBelle 107 Synthetic Lubricant on the motor bearings, commutator, and brushes. I've seen it work "miracles"....

[Howbi]

@ Badgercote...........Hornby spares, replacement motor X9674, £6.74...........reasonable price... 😀...HB

[Fazy]

For that money I would just buy one and save the hassle. 

[Badgercote]

Found the problem, it is the actual motor X9674 as mentioned above. It runs for a few seconds then heats up and stops, obviously nick-nacked.

Removed it, labelling all the little black wires (why ALL black, not coloured for ease of recognition?) so hopefully when fitting the new motor everything works as it should.

Such a shame as it's the Northern Belle R3134 loco and I've not had it long. Anyway such is life.

[poliss]

Did you buy it new? If it's 6 months old or less you should have contacted the retailer for a repair or replacement.

[Wobblinwheel]

Can you get some LaBelle 107 lube? I tried it after seeing a Youtube video demonstrating various uses for the 107, and motor brushes and bearings was one of them. It "miraculously" repaired two motors that were getting hot and "seizing up" just like yours seems to be doing. Made the motors much quieter also. I'm going to continue to use this upon any sign of motor issues in the future! It's worth a try......by the way, it is also an excellent plastic-compatible medium-weight lube for wheels and drive train, siderods and valve-gear. I recently discovered it, and it is good stuff....