<p>I agree with HaydenStudios, it is impossible to disassemble completely NXT motor without breaking the orange axle hub. You can nonetheless half-open it enough to see what's happening inside (you need a Torx screwdriver - T10 size if I remember well - to open it. See photos here <a href="http://philohome.com/nxtmotor/nxtmotor.htm" rel="nofollow">http://philohome.com/nxtmotor/nxtmotor.htm</a>.
Anyway, first try to see what LEGO support can do for you!</p>

CC BY-SA 3.0
2014-09-27T12:23:13.743Z
2014-09-29T17:16:05.030Z
2014-09-29T17:16:05.030Z
Philo
<p>I had a similar problem with the RCX about a month ago.  Check the wires for shorts or fraying, and if you can open the case and look for shorts in there.  I fixed my fraying wire with electrical tape.</p>

CC BY-SA 3.0
2014-10-03T15:57:14.017Z
Glad to hear you could fix your problem with electrical tape. I doubt that will help this "Faulty NXT Motor", since "very stiff to rotate manually" is an indication of broken gears inside to motor.
dfrevert
CC BY-SA 3.0
2014-10-03T20:09:27.393Z
Mine was also "stiff to rotate" until I fixed it
jamd315
CC BY-SA 3.0
2014-10-03T00:33:05.927Z
2014-10-03T00:33:05.927Z
jamd315
<p>I have a motor that prevents the program from running. It simply allows a few slow movements forward with stops in between. It seems very stiff to rotate manually. Any way I can repair this motor?</p>

CC BY-SA 3.0
2014-09-27T11:44:11.767Z
This happened to me a long time ago. I ended up just getting a new one to replace it. I'm wanting to say that disassembling a motor beyond a certain point makes it impossible to reassemble, so I'm not sure how practical it would be to repair a motor.
HaydenStudios
<nxt><motor><repair>
Faulty NXT Motor
Sheri
# Faulty NXT Motor

(Asked by: username_0 on 2014-09-27)

I have a motor that prevents the program from running. It simply allows a few slow movements forward with stops in between. It seems very stiff to rotate manually. Any way I can repair this motor?

**Tags:** nxt, motor, repair

> **Comments:**
> **username_1**: This happened to me a long time ago. I ended up just getting a new one to replace it. I'm wanting to say that disassembling a motor beyond a certain point makes it impossible to reassemble, so I'm not sure how practical it would be to repair a motor.  

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## 2 answers

### Answer by username_2 on 2014-09-27. Score: 2

I agree with username_1, it is impossible to disassemble completely NXT motor without breaking the orange axle hub. You can nonetheless half-open it enough to see what's happening inside (you need a Torx screwdriver - T10 size if I remember well - to open it. See photos here <http://philohome.com/nxtmotor/nxtmotor.htm>.
Anyway, first try to see what LEGO support can do for you!


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### Answer by username_3 on 2014-10-03. Score: -1

I had a similar problem with the RCX about a month ago. Check the wires for shorts or fraying, and if you can open the case and look for shorts in there. I fixed my fraying wire with electrical tape.

> **Comments:**
> **username_4**: Glad to hear you could fix your problem with electrical tape. I doubt that will help this "Faulty NXT Motor", since "very stiff to rotate manually" is an indication of broken gears inside to motor.  
> **username_3**: Mine was also "stiff to rotate" until I fixed it  

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