13112 RC Excavator Building Set, 1830 Pieces Building Blocks APP Remote Control Truck Construction Vehicles Model with Motor, STEM Engineering Toys for Adult

Just finished this build today. I made e modifications that I think turn this into an excellent RC excavator. First I swapped out the dual battery boxes for a single 6 channel battery and remote with proportional controls. Mould King sells it for $40 her on Amazon. It's a tight fit. But will fit into the rear battery box spot unmodified. Just adjust the position of the technic beam on top of the xl motor forward one stud. 2. The mounting brack that attached the rear of the lift cylinder that controls the sticks in and out movement. ( Located on top of the boom) Needed to be raised up by one stud, ( or hole) to make the mechanisn work smoothly and not bond up. 3. The bucket it comes with is way too wide for a real excavator. So I 3d printed my own bucket that looks much more realistic. Basically the same exact shap but half the width. Every piece was there and it's a fun build. Definitely challenging. Pay close attention to details and go slow. Keep an eye on some pieces that look almost identical to each other but have slots in them to mate up to other parts. If you use the wrong ones, you'll regret it later, and be tearing pieces apart to swap them. Trust me! All in all great build. Just needed a few tweaks to make it perfect. Fully 100% compatible with Lego and Lego technic. Even the motors are Lego power functions basically.

If you just want to build a unique and well engineered mechanical model for the joy of doing it, then this is GREAT value. If all of your problems are first-world, you have $500 to burn, AND you demand the absolute finest quality control in every respect, then buy yourself some lego and what are you doing even looking at this? Anyway, I was consistently impressed with the fit, design, and features throughout. The instructions are FINE. There was no point where the quality of instructions was nearly as low as the price. I expected absolute trash based on the price! But this set was clearly produced with much more care than chinas typical level of effort when producing knock-off type products. The parts fit together in a consistent and surprisingly precise way( not as good as lego but way better than COBI). They consistently exceeded my (minimal) expectations with sufficiently detailed instructions, and mechanisms which were engineered with a clear priority for high functionality and aesthetic over cheap simplicity.

This is a great build! Drives great, operates great! Only downsides: 1) you have to turn the remote off/on if you want to switch from driving to using the bucket. 2) the drive control is reversed on each side so to go forward one side is the top button the other is the bottom button. Tried to fix that but failed. 3) the bucket is WAY, WAY to big. You can't pick up anything because the weight is too much for the gears. I tried picking up a half bucket of dog food (it was there. Lol) and the gears just clicked or stopped all together. I have also never seen an excavator with a bucket that size (proportion wise) in my life. it looks like they used the bucket from a loader for this model because they didn't feel like making one specifically for the excavators. If they put the right size bucket with this it would be PERFECT. Maybe I'll make one out of ABS sheet for it. Lol

Pros: Has all 6 functions of a real excavator (all independent of one another): left track (forward/reverse), right track (forward/reverse), swing (rotate left/right), boom (up/down), stick (in/out), and bucket (curl/uncurl). Can swing infinitely in either direction. Fun build with impressive mechanical drive designs. No pieces missing. Cons: The controller is awkward because 1) it lacks analog inputs / each command is either at 0 or 100% and 2) the controller needs to toggle between modes to select between track functions vs. digging functions; you can buy "Mould King M0019 6.0 Powered Module Kit" to separately upgrade to 4 analog + 2 digital functions (too big to be a perfect drop-in replacement). The boom/stick joint is not sturdy. Observations: This is an advanced build; interpretting the manual requires skill and possibly some judgement. Some parts fit tight and require strong adult hands. Both ends of the boom rams attach to rigid carbon fiber shafts. Boom rams can be manually adjusted to match in length. My tracks have remained on without issue (was careful to count track links; spare link was included in package). Front left cab pillar is made from rubber tube that needs to be cut to length. When a ram jams, remove both ends from excavator, manually turn gear to unjam ram, and reinstall. For the $130 price, I'd make this purchase again.

Everything electronic worked great and has a feeling just like Lego to put together the one thing I had a problem with was bag 5 had one missing piece so I found the same piece as a spare in blue so no big problem

You will need to buy a 6 channel remote to operate the set. This will require you to take out the box that it connects to & put a new one in that’ll operate in 6 different ways. If you don’t pay the additional $40 for it you’ll have to open it up every time you want to operate the “arm & bucket” or “the tracks.” If this was mentioned in the add I would’ve not bought this product because of how pricey it already is & now adding another purchase that wasn’t included in the first place. Besides the flaw not being mentioned to operate both ways this was a nice project, took days to build & was very complicated. How it works is very interesting… however I stopped building it once I found out all that so I only built not even 3/4 of it (272/444). I’d send it back if it wasn’t for me already building it & the fact I didn’t build it for months after the return was possible.

Honestly this was a decent challenge, but more from the difficult instructions than actually assembling. I'm impressed with the level of detail and the overall function. If you ask me, these sets give Lego a serious level of competition. I know people have mentioned missing pieces, but I had zero missing (actually plenty of spare parts used to join parts together). Most times when you thought something was missing, it turned out I misunderstood the instructions and used the wrong part somewhere else lol. Overall very fun to build!

Love it

Certaine pièces peuve porter à confusion bien choisir les pièces tel que demander sur le plan le seul hic on peut pas faire avancer la pelle et utiliser la pelle ou la faire pivoter on doit éteindre une batterie et allumer l autre les 2 ne peuvent être connecté à la télécommande ne meme temps

Good construction changing build the app its cool too Would recommend some latex spray on the gears or some kind if oil

Putting together this excavator was pretty simple, but very time consuming it came with all the parts and pretty clear instructions. Some MacGyvering work had to be done as the gears that controlled the arm chipped. This kit needs a higher powered motor with a beefy or gearing for the arm. It could barely pull its own arm up. If you want to put anything in the bucket and pull it up, it is impossible, leading the gears to grind and chip itself away. Overall, it’s a good display piece that drives and turns pretty good, just can pick anything up.