In stock

Happy Build


  • Design: Happy Build YC-GC004 KY EXCAVATOR was designed and licenced by Shine Yu. The prototpye of this vehicle is HITACHI EX1200 Mining excavator.
  • Appearance: This authentic replica captures the magnificent outlook and powerful structure of the original excavator. Black wide tracks, white superstructure, powerful arm, large bucket, counterbalance blocks. Details including ladder, balustrade, simulated heat dissipation hole, etc.
  • Tracks: Widened tracks with good traction, allowing the vehicle to go through complicated terrains like desert, grassland, etc. The two tracks are drove by one L motor separately and powered by one battery box. When moving forward or backward, the two tracks will work together. When turning, you can just move one track or make two tracks move in opposite direction.
  • Infinite Spinning Worktable: With Shine Yu original specially designed Bearing, the work table can spin clockwise or anticlockwise no matter how many circles as you want, until the battery runs out. Worktable is drove by one XL motor and share a battery with the excavator arm.
  • Strong Arm: The arm contains four parts: the bucket, front arm, middle arm and rear arm. The bucket and front arm is drove by one L motor and controlled by gear rack + screw to realize extend and dig. The middle and rear arm is drove by another L motor, controlled by gear rack + screw to realize lifting or lay down the arm. All the three joints are movable, making the arm and bucket rather flexible for digging.
  • Motor Functions Pack: Equips with 6* L motors, 1* XL motor, 2* extension cables and 2* Bluetooth Lithium rechargeable batteries. Equips with very detailed paper instructions on how to lay the cables of the motors. 
  • APP Control: Scan the QR code, download the free app and connect by Bluetooth, you can remote control the excavator by your mobile phone. Four controlling modes available: normal mode, gravity sensing mode, drawing programming mode and speech recognition control mode. Currently, the speech recognition control mode support Chinese Mandarin only, maybe this can be a start for you to learn a few mandarin phrases.
  • Quality: Made of high quality ABS material, the bricks are smooth, coordinated in colour and fit well with each other, won't be too tight nor loose, well up to market leading quality. Bricks are compatible with most brands on the market.
  • Assembly: 4342 pieces in total, step-by-step packing makes it convenient to find and build. Comes with very detailed colorful paper instructions manual. This is a rather complex technic model, with plenty gears, it won't be a easy work, some building experience will help.
  • Packaging: Original colorful packaging box. Decent gift or self collection.



Brand Happy Build
Product ID YC-GC004
Brick Amount 4342 
Product Size 148 x 41 x 97 cm
Product Weight 6kg
Material ABS
RC Version Yes
Instruction Form Paper
Package Original Box
Questions about Service
Q1 : How will I get help ?
A1 : Please feel free to contact with our Service Support Team service@lesdiy.com. You will get response in 1 weekday.

Questions about Missing or Ddefective Parts
Q1 : What can I do when I find some parts are missing or defective?
A1 : We will provide free parts for these case in 6 months since ordered.

Questions about Shipment
Q1 : Do you ship worldwide?
A1 : Yes, we can ship worldwide.
Q2 : Where you ship goods from?
A2 : Our warehouse is located in China, the goods will be shipped from China mainland.
Q3 : What is the shipping cost?
A3 :

Other Regions please refer to the U.S.A

Q4 : How do I track my package?
A5 : The package can be tracked on 17track.net . Or if you need a team members help to check up, please contact with our service team service@lesdiy.com and we will be in touch with a status update.

Questions about Payment & Order
Q1 : What payment terms you can accept?
A1 : For payment, we accept Paypal and Credit Card.
Q2 : My payment was declined, why? How to solve it ?
A2 : If you made the purchase via Credit Card and failed, could you please contact with Stripe Support Team for solution? Or if the issue cannot be solved, please no worry, we accept Paypal payment as well.
Q3 : How do I cancel my order?
A3 : For the order, if not shipped out yet, please contact with our Service Support Team service@lesdiy.com , we will cancel your order and give you full refund.
Q4 : Is my information is securing using this site?
A4 : Yes, Lesdiy takes precautions to protect your personal information. When you submit sensitive information via the website, your information is protected both online and offline. Please don’t worry for this.
Q5 : What if my address is wrong?
A5 : If the recipient's address was wrong, after the failed delivery, the parcel should be returned back to sender. After we receive the parcel, we will contact you for an updated address and arrange re-delivery for your package.

Questions about Return & Refunds
Q1 : What items are returnable?
A1 : a)- We can accept returns or exchanges within the 30-day period. b)- All returned items must be in the original condition: unused, unwashed, and unworn. No exceptions.
Q2 : How do I return a product?
A2: Contact with Lesdiy Service Team service@lesdiy.com to confirm details to make sure the item is meet the return condition. After the agreement, Service Team will send the detailed return information, please offer return tracking number after return shipment .
Q3 : What is you refund policy?
A3 : Refunds are processed within 1-5 business days, after you received our confirmation on the cancellation.
Q4 : How will you refund me?
A4 : The refund are applied to the original payment method.

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