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Showing results for tags '42131'.
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42131 CAT Dozer outdoor experience
KirTech LAB posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hi! I'd like to share some thoughts regarding a winter test-drive of my 42131 CAT D11 Dozer. The first indoor tests left very good impressions, and I was excited to try it outdoor. I still remember a short video from the official LEGO website, were the 8275 Dozer pushes snow (it was about 15 years ago :)) The set isn't new, I tried to find something similar here, but without any results. Sorry, if this topic has been already discussed. - Let's begin with the most important function - a motion. It works very well indoor, especially on a soft surface, but for moving in snow grousers are too small. Of course the model can push some amount of snow but it tends to stuck and skid. Some additional beams on tracks will improve the situation. - As we know, the blade elevation in a stock model works extremely slow, I tried to solve this problem by replacing gears near the actuators. Instead of 12:20 reduction I've done 20:12, but the system even couldn't complete a calibration, so I ended up with 12:12 ratio. But in outdoor conditions (it was pretty cold) it didn't work, probably because of accumulators voltage drop. So, during the test-drive I couldn't change the elevation at all. And as a result, I also didn't use a blade tilting mechanism. - Of course, the ladder mechanism works perfectly in any conditions :) - And the last function - a ripper. If we follow building instructions of the set, ripper won't even touch the ground, so it's necessary to change its connection points. The ripper works very well in loose snow. It would be cooler to have three teeth instead of one, but there is a risk, that it will be not a ripper but anchor, because of low tracks friction :) So, without any modifications the model has pretty low performance in snow (yes, I'm spoilt by BuWizz and buggy-motors). But I had a lot of fun during these tests, you can check the dozer in action: Thanks for watching! -
[MOD] 42131 CAT D11 Bulldozer Upgrade
A_C posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
This MOD upgrades your CAT D11 as below: - increase the blade lifting speed by 67% (the Control+ app needs to be calibrated after this MOD) - close the gaps near the front panels - make the front linear actuators look stronger - replace the rear fake linear actuators with a real one; they can be controlled manually to tilt the ripper - add 2 fire extinguishers near the cabin 115 extra parts are needed. The most expensive parts are the 2 black linear actuators (43097). Replace them with the LBG one (61927b) is fine. Or just like me, sprayed the LBG one with semi-gloss black. Instruction available at https://rebrickable.com/mocs/MOC-91485 Enjoy and have fun!