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Retiring soon
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Item 1 of 7
Item 1 of 7
Item 1 of 7

Bucket Wheel Excavator


Available now

Bucket Wheel Excavator4.5495591.
Limit 20
Choking Hazard.
Small parts.

Product Details

Experience the huge Bucket Wheel Excavator!

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Enter the world of mining on a colossal scale with the massive Bucket Wheel Excavator—the largest LEGO® Technic set to date! This highly detailed 2-in-1 model has been designed to provide an immersive and rewarding build and play experience, and comes with an array of motorised functions, including forward and reverse driving, moving conveyor belts, working boom with revolving bucket wheel, and a rotating superstructure. You can even rebuild the model to create a Mobile Aggregate Processing Plant.

  • Features a LEGO® Power Functions motor for an array of motorised functions, including forward and reverse driving, rotating bucket wheel, moving conveyor belts and rotating superstructure, plus a working bucket wheel boom.
  • Also features hand-railed walkways, lights, mined-material elements and a rugged mine truck.
  • Switch on the LEGO® Power Functions motor and maneuver the huge tracked structure into position.
  • Activate the motorised conveyor belts and bucket wheel.
  • Move the joystick to rotate the massive superstructure.
  • Raise and lower the huge bucket wheel boom.
  • Follow the mined material from the bucket wheel to the moving conveyor belts and all the way to the waiting mine truck!
  • This LEGO® Technic model is designed to provide an immersive and rewarding building experience.
  • This set includes over 3,900 pieces, making it the largest LEGO® Technic set to date.
  • 2-in-1 model: rebuilds into a Mobile Aggregate Processing Plant.
  • This set offers an age-appropriate building experience for ages 11-16.
  • Bucket Wheel Excavator measures over 16” (41cm) high, 28” (72cm) long and 11” (29cm) wide.
  • Mobile Aggregate Processing Plant with boom retracted measures over 8” (21cm) high, 34” (88cm) long and 8” (21cm) wide, and over 12” (33cm) high with boom extended.
  • Mine Truck measures over 3” (10cm) high, 7” (19cm) long and 3” (10cm) wide.
Building Instructions
Bucket Wheel Excavator

Customer Reviews

Overall Ratingrating.prefix4.5rating.postfix
(91 Reviews)
93% would recommend this product.


Overall Experience

Play Experiencerating.prefix3.9rating.postfix
Level of Difficultyrating.prefix4.1rating.postfix
Value for Moneyrating.prefix4.6rating.postfix
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1 of 23
  • 2 days ago
    Cool, but slow
    I would recommend this to a friend!
    Purchased for: Self
    I was excited to buy it, and I loved building it. I heard that it was cumbersome with the Power Functions XL motor, but that didn't matter to me. However, after building it and getting it up to speed, I found that it really isn't that fast or powerful. The motor glitches occasionally, it creeps and rotates excruciatingly slowly, and when attempting to dig any Legos, the wheel stops. This needs a more powerful motor to be able to use. Since Lego doesn't make a more powerful motor than what's included, you're stuck. All of the PF concerns aside, it looks fantastic. I would still recommend it for the building experience and the sheer size and presentation of the finished product.

    Response from LEGO SHOP

    24 August 2016
    Jonathan, Consumer Service Specialist, LEGO® Consumer Services
    It is wonderful to hear that this build was as fun as you expected. One of the great features is that all of the functions are connected to one motor. The complicated gear structure in this model just shows you how there are no limitations when building with LEGO elements! Just like in the real thing, this large machine is designed to roll, turn and load very slowly. In fact, the real Bucket-Wheel Excavator only has a top speed of 0.6km/h or 0.37 mph.  An aspect you may want to watch out for is the proper connection of all bricks and gears because if even one part is of place it will affect the entire build.
    Play Experiencerating.prefix1rating.postfix
    Level of Difficultyrating.prefix4rating.postfix
    Value for Moneyrating.prefix4rating.postfix
    Build Time: 2 days
    Building Experience: Advanced LEGO builder
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  • 3 months ago
    Massive Set - Probably Largest Technic set made.
    | 35-44
    I would recommend this to a friend!
    Purchased for: Self
    Pretty sure this is the largest technic set made by Lego to date. Purchased this set for myself and had a blast building it. What is powered versus is what is not, starting from Base up. Base moves forward and backward (Powered) Base Pivots left and right (Powered) Bottom Conveyor belt (Belt Powered - Swing is manually adjustable with knob) Top Digging Arm (Up and Down - Manually Adjustable with Knob) Top Digging Arm Conveyor and Bucket wheel (Powered) Top Digging Arm has Drive and Rotate controls on top Vertical tower has knob for adjusting Digging arm height (up and Down) Base has knob for adjust bottom conveyor belt swing from left to right along with a locking switch. Base also has a little tiny knob for deploying the side raid ladder (Detail is amazing). Overall dimensions from what i can see is 11 inches deep, 16 inches tall, and 28 inches wide. Weight is around 7.6 pounds for the digger itself. Set is a massive slow mover which is spot on with the actual digger in real life - Wanted to point this out so you are not alarmed once you put this set together and see how slow it moves, that is by design. The extra large motor is a neccesity for such a beastly set as this one. Inside the Giant Box - there are bags label from 1-8 Bags 1-3 are located in the White box within the packaging Bags 4-8 are loose in the big box There is a complete bag #4 of grey lego pieces that are used just for the playability and is supposed to simulate debris and conveyor belt debris/material for digging (Which is an awesome touch by lego I might add - Thanks Lego) The most intense part of the build is bag 6 (where you build the big bucket arm) I have added a 12 oz soda can to the pictures so you can get a better judgement of the scale of this set. The Mini dump truck is the same size as the mining truck from set 42035 if you are wondering. I would recommend getting the truck from that set too as it goes very well with this set. I was asked by a friend can you carry it by the tower top (as a handle) - Yes, you can although I feel uneasy doing it, it does seem to be very sturdy when I do carry it like that. Overall a very fun build and just massive and i do mean MASSIVE - Well Done Lego!
    Play Experiencerating.prefix5rating.postfix
    Level of Difficultyrating.prefix4rating.postfix
    Value for Moneyrating.prefix5rating.postfix
    Build Time: 6 hrs
    Building Experience: Expert LEGO builder
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  • 14 days ago
    | 35-44
    I would recommend this to a friend!
    Purchased for: Self
    I love the high part count and complexity of the set. I said it took me 10 hours to build but, I built it over the course of a few weeks when I had time. I actually bought two sets so I could build the aggregate separator and have them work together. They don't. :-( The conveyor for the BWE is too low to feed the hopper on the MAS. Oh well, the kids LOVE playing with them at the kitchen table. I also bought a half gallon size plastic bag of extra "rock" pieces and put them in a glass cake pan and let the BWE scoop them up. It's a great set and I love looking at them every day as they are on display on my chest of drawers in the master bedroom. Glad the wife is long-suffering!
    Play Experiencerating.prefix5rating.postfix
    Level of Difficultyrating.prefix4rating.postfix
    Value for Moneyrating.prefix5rating.postfix
    Build Time: 10 hrs
    Building Experience: Expert LEGO builder
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  • 16 days ago
    Good set with a few drawbacks.
    | 35-44
    I would recommend this to a friend!
    Purchased for: Self
    The goods: 1. Loads of parts!! Just too many parts in the box and the weight almost breaks the yellow LEGO vinyl bag. If you ordered it from Internet, give some praise to your delivery people. 2. It's not just many parts. This set contains loads of square frame parts and gears which are super useful in any MOC designs. If you want to dive into Technic building, this set is a MUST buy set. 3. Many functions. Rolling conveyor belts and bucket wheel operation are already worthwhile to make a contraption. This set also moves forward and backwards and the superstructure rotates. Although the bucket wheel elevation and lower conveyor part rotation are manual but it's not too hard to motorize it due to its sheer size!! 4. Although you can't mount a Minifigure, this model is actually a one of few Minifigure sized Technic models. The cockpit can contain a Minifigure if you modify the seat with a proper studded one. (This is a definite plus for anyone wants to play with!!) 5. The finished A model is a huge contraption but is actually very sturdy. You can carry this heavy contraption by holding the top part of the arch!! The bucket wheel arm itself is really sturdy as well. You can even wield it around without problem. The drawbacks. 1. Too many parts and gears: causes too much backlash and almost impossible to debug when something isn't working well. I've changed the tandem clutch wheels with 24 teeth gears to ensure smooth bucket wheel operation (see one of my pictures.) But this isn't safe especially if any mineral(or Skittles!!) stuck into some corner to hamper any motorized operation. It's gonna break rest of gears or overheat PF XL motor. 2. The backlash is severe. For example. The lower conveyor belt lock is almost invalid. Even though you engage the lock, the conveyor belt slides like +30 to -30 degrees without any serious impedance. 3. In other words, this set is super hard to make it operate properly. Although putting parts together is not hard at all(since this model doesn't have any pneumatic hoses and threads), fitting all the parts to ensure smooth operation is a great challenge. The hints on instruction manual aren't enough. You are warned!! 4. B model instruction is only available on the Internet. Browsing through hundreds of PDF pages (especially without proper index codes!!) isn't convenient at all. 5. The control panel has many functions. But the operation is kinda limited. You cannot mix any rotation with linear movement. i.e. The bucket wheel cannot rotate when the excavator is moving forward. A MOC project to work on!! Although I've pointed out as many drawbacks as pros, it's not a bad model for the size. Heck, this is the largest PF motorized Technic model (excluding fan designed MOCs) so far. Remark: You better visit Bulk Barn to play with this model properly!! Skittles!! Skittles!! more Skittles!!
    Play Experiencerating.prefix5rating.postfix
    Level of Difficultyrating.prefix4rating.postfix
    Value for Moneyrating.prefix5rating.postfix
    Build Time: 8 days
    Building Experience: Expert LEGO builder
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1 of 23
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