Hi, a few minutes ago I tried my M motor but it didn't work, and it's still not working.

So what do I do?

Is there a known way of fixing a motor or should it go directly to the trash can?

Thanks!

Contact LEGO Customer Support, usually in cases like this, they are sending a new motor to customer.

I had the same problem with I believe two or three PF motors a really long time ago and after a couple months of trying to figure out what was wrong I called Lego and after sending my broken motors to them they sent me some new ones for free. What I found out after all that time of thinking was that the the actual wiring had come loose after all that handling. It is a rather annoying problem for if the wire is bent in one position it might work but it won't work in another position. I think this the problem with one of my M Motors. After trying to find a position that would work I think it stopped working completely. As for the other two.. or one.. (i don't really remember. It was a REALLY long time ago) I think they just randomly stopped working..

You may be able to send it back to Lego, but if you can't...

If the motor core itself is broken, just replace it. There are many different motors exactly this size and shape, some probably more powerful than the one in the M-motor. I once replaced the motor with one from a 4.5v RC car, so I could use the PF M with the RC car's circuit board.

Open the M motor to find out what the problem is (the motor core or the connections). If the core is not broken, reconnect it. If it is broken but you don't want to replace it with a different one, at least keep the gearbox and housing as spare parts for repairing broken motors in the future or for making customized PF motors.

(the link is to a PF XL which spins at 6x the normal speed).

When I go to the lego.com costumer service I says replacement parts-> broken parts(in a new purchase). Should I click that?

When I go to the lego.com costumer service I says replacement parts-> broken parts(in a new purchase). Should I click that?

And describe your problem, they should reply or call you in few days. I had broken XL motor (too late described it's only broken cable) - but they send me new motor, and told to keep this broken (if it's something that i want to repair by myself, i can keep it and try to repair :P)

Thanks everybody!

I received this email:

Dear LEGO® friend,<

<

thank you for emailing LEGO Direct. We were disappointed to hear that your new

LEGO set contained a faulty part. We work really hard to make sure that our

products meet your expectations of the LEGO Group so we're sorry that this

wasn't the case with your recent experience. <

<

Unless we need to contact you regarding your part, we'll post a replacement to

you as quickly as possible. This should arrive within 15 working days.

<

Best Wishes <

Your LEGO Direct Team<

<

PS. This email has been sent from an auto-notification system that cannot accept

incoming email. Please do not respond to this message.<

<

<

LEGO Direct:028167839A [EN-RW]

It means I get to keep my broken motor right?

Thanks everybody!

I received this email:

Dear LEGO® friend,<

<

thank you for emailing LEGO Direct. We were disappointed to hear that your new

LEGO set contained a faulty part. We work really hard to make sure that our

products meet your expectations of the LEGO Group so we're sorry that this

wasn't the case with your recent experience. <

<

Unless we need to contact you regarding your part, we'll post a replacement to

you as quickly as possible. This should arrive within 15 working days.

<

Best Wishes <

Your LEGO Direct Team<

<

PS. This email has been sent from an auto-notification system that cannot accept

incoming email. Please do not respond to this message.<

<

<

LEGO Direct:028167839A [EN-RW]

It means I get to keep my broken motor right?

This is auto responder email. Now someone from lego customer service will contact you - via phone or email.

This is auto responder email. Now someone from lego customer service will contact you - via phone or email.

Exactly. From my experience, Lego support is kinda slow in replies, but work. They send my broken parts within 3 weeks without discussion. Lego customer care is much better in last two years.

This is auto responder email. Now someone from lego customer service will contact you - via phone or email.

They won't always contact you, often they'll just ship the part. If you need to post back the faulty part you'll get a note telling you with the replacement part.

They won't always contact you, often they'll just ship the part. If you need to post back the faulty part you'll get a note telling you with the replacement part.

That's great! And even better is that my motor is back to life! I hope it stays like that... :)

To prolong the life of any brushed motor, it's a good idea to break-in the motor, by free running it for 10 minutes on each directions without any load or gears attached to it. This will allow the carbon brush to seat and confirm properly on the armature, therefore reducing the motor life-shortening 'arching' (sparks). I did this to all my PF motors. I dream one day Lego will make a maintanance free sensored base brushless motor, which has HUGE advantage over brushed motor such as no brushes to wear out, no arching, less resistance, more efficient power delivery therefore more torque. However that'll shoot the price way above the current PF setup, since a brushless motor control module is required too,but that could be integrated within the PF battery box so size should remain the same.

I have another question for you, How to open the M motors casing?

I tried to do it but I'm afraid I harmed it or something...

I have another question for you, How to open the M motors casing?

I tried to do it but I'm afraid I harmed it or something...

Isn't possible without harming plastic.

http://www.lugpol.pl/forum/viewtopic.php?p=49804

Robson posted topic about it a while ago on lugpol message board (in polish, but contains photos of course)