<p>I had the same problem but turns out the app graphics are just wrong. Completed the build and it works perfectly fine.</p>

CC BY-SA 4.0
2022-07-23T20:04:12.143Z
2022-07-23T20:04:12.143Z
Tom Wilson
<p>I am building the <a href="https://www.bricklink.com/catalogItemInv.asp?S=42131-1" rel="nofollow noreferrer">D11 dozer</a> and some of the tests like 2 and 4 are moving the parts in the opposite direction that they are supposed to be going. I took apart the entire build and rebuilt it and the same problem is still happening.</p>
<p><a href="https://i.sstatic.net/gfEcI.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/gfEcI.png" alt="42131" /></a></p>

CC BY-SA 4.0
2022-06-10T05:15:24.140Z
Could you please tell what tests #2 and #4 are for?
Alex
<technic><building><motor><gears>
I am building the LEGO 42131 D11 dozer and some of the parts are moving in reverse when testing
Aidan
# I am building the LEGO 42131 D11 dozer and some of the parts are moving in reverse when testing

(Asked by: username_0 on 2022-06-10)

I am building the [D11 dozer](https://www.bricklink.com/catalogItemInv.asp?S=42131-1) and some of the tests like 2 and 4 are moving the parts in the opposite direction that they are supposed to be going. I took apart the entire build and rebuilt it and the same problem is still happening.

[![42131](https://i.sstatic.net/gfEcI.png)](https://i.sstatic.net/gfEcI.png)

**Tags:** technic, building, motor, gears

> **Comments:**
> **username_1**: Could you please tell what tests #2 and #4 are for?  

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## 1 answers

### Answer by username_2 on 2022-07-23. Score: 7

I had the same problem but turns out the app graphics are just wrong. Completed the build and it works perfectly fine.


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