<p>According to Bricklink,  Set # 7730 has this motor :</p>

<p><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb12va&amp;idColor=5#T=C&amp;C=5" rel="nofollow noreferrer">bb12va Electric, Train Motor 12V Modern Type I with 2 round contact holes</a></p>

<p>For disassembly and repair you can look at this <a href="https://www.eurobricks.com/forum/index.php?/forums/topic/113994-12v-train-motorbb12v-disassembly-and-repair/" rel="nofollow noreferrer">large post with pictures on Eurobricks</a> by Andromeda</p>

CC BY-SA 3.0
2018-03-08T16:07:57.870Z
2018-03-08T16:07:57.870Z
Syberion
<p>Unfortunately, repairing it will not work, if the shaft is bent, as the wheel would just fall off again.</p>

CC BY-SA 3.0
2018-04-04T08:55:58.170Z
Replacing shafts is something routinely done on non - LEGO mechanisms. Why wouldn't it work here, if it's bent?
Mołot
CC BY-SA 3.0
2018-04-03T20:21:20.613Z
2018-04-03T20:21:20.613Z
Crafter4017
<p>I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set.  The motor has stopped working as it has been dropped on one of the wheels.</p>

<p>How can I open the motor case to effect a repair?</p>

CC BY-SA 3.0
2017-12-21T02:14:13.570Z
Do you want to open the train unit or the motor itself?
Mast
CC BY-SA 3.0
2017-12-21T10:28:40.380Z
I need to open the red case of the motor itself. I think that one of the gears has been forced out of engagement, maybe the shaft is bent,
RAP 77
<trains><repair><12v>
How can I repair a red 12v train motor from Set# 7730?
RAP 77
# How can I repair a red 12v train motor from Set# 7730?

(Asked by: username_0 on 2017-12-20)

I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set. The motor has stopped working as it has been dropped on one of the wheels.

How can I open the motor case to effect a repair?

**Tags:** trains, repair, 12v

> **Comments:**
> **username_1**: Do you want to open the train unit or the motor itself?  
> **username_0**: I need to open the red case of the motor itself. I think that one of the gears has been forced out of engagement, maybe the shaft is bent,  

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## 2 answers

### Answer by username_2 on 2018-03-08. Score: 1

According to Bricklink, Set # 7730 has this motor :

[bb12va Electric, Train Motor 12V Modern Type I with 2 round contact holes](https://www.bricklink.com/v2/catalog/catalogitem.page?P=bb12va&idColor=5#T=C&C=5)

For disassembly and repair you can look at this [large post with pictures on Eurobricks](https://www.eurobricks.com/forum/index.php?/forums/topic/113994-12v-train-motorbb12v-disassembly-and-repair/) by Andromeda


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### Answer by username_3 on 2018-04-03. Score: 0

Unfortunately, repairing it will not work, if the shaft is bent, as the wheel would just fall off again.

> **Comments:**
> **username_4**: Replacing shafts is something routinely done on non - LEGO mechanisms. Why wouldn't it work here, if it's bent?  

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