Discount code for the first item: HD12 Discount code for the second item: HD25

Discount code for the first item: HD12

Discount code for the second item: HD25

HD25

MOC-89126 Union Pacific 4014 Big Boy

LesDiy  |  SKU: 3384665
Size: 89cm×8.5cm×13.5cm.
Tips: This product does not include prints and minifigures.
$219.99 $269.99
Prices include VAT and customs duties. Shipping costs are calculated at checkout based on your location and chosen delivery method.


Delivery and Shipping

Add some general information about your delivery and shipping policies.

You will receive a confirmation e-mail after placing an order and another e-mail after your order has been shipped. The second one will contain the tracking information and some instructions on how to track your parcel. The total time it takes to receive your order is described below:

The total time is the sum of the processing time and the shipping time.

Processing time = the time between when you place an order and when we ship it;

Shipping time = the time between when your order has been shipped and delivered to you;

The total delivery time is calculated from the time your order is placed until the time it is delivered to you. Total delivery time is broken down into processing time and shipping time.


Processing time:

The time it takes to prepare your item(s) to ship from our warehouse. This includes preparing your items, performing quality checks, and packing for shipment. 

Since our MOC sets are brand new, it requires 15 days handling time from order to shipment, then shipping takes about another 15 days.


Shipping time:

The time for your item(s) to travel from our warehouse to your destination.

Standard Shipping:25-35 business days (Free Shipping)


HOW MUCH DOES SHIPPING COST?

Switzerland

0-2kg $20.00
2-4kg $55.00
4-6kg $66.00
6-8kg $82.00
8-10kg $105.00
10-12kg $125.00
12-14kg $140.00
14-16kg $155.00
16-18 kg $170.00
18-20 kg $185.00
20-22 kg $165.00
22-24kg $180.00
24-30kg $200.00
30kg+ $300.00

 

Rest of World: Free Shipping

 

CAN YOU SHIP TO MY COUNTRY?
We can ship to most of area of the world. If we meet troubles of delivery, we will contact in 1-2 business days after you ordering.

WHY CAN I NOT SELECT MY DESIRED COURIER?
We always do our best to select the most convenient courier for your preferred shipping method among the high number of options available.

I URGENTLY NEED TO RECEIVE MY ORDER. CAN I SELECT AN EXPRESS SHIPPING METHOD?
You may have to pay higher shipping fees for selecting an express shipping method. Moreover, orders shipped with an express mail service usually have a higher probability of being stopped by Customs officers and of incurring in higher import duties. You will be able to contact with us lesdiylt@gmail.com

Shipping & Service Delays
Shipment dates are estimates in accordance with our carriers. If you live in an area experiencing an unexpected service delay (i.e. severe weather, natural disasters, unscheduled events, etc.), please note there may be additional shipping time to receive your order.

Tracking Your Package
If you have provided your email address we will send you a ship confirmation email when your order ships. For all orders this email will include a tracking number which you can use to track your package on the appropriate shipping carrier’s website.

If for any reason you are not entirely satisfied with an order, please contact our Customer Service team. We're always happy to help!

  • MOC-89126 was designed based on the biggest steam locomotive in history. This product was designed and authorized by Morningstrummer.
  • the product is a highly realistic replica of the Big Boy steam locomotive, the biggest and most powerful steam locomotive in history. It is the only steam locomotive with 4-8-8-4 wheels in the world.
  • There are two sets of driving wheels in front and rear of the train, each set of four axle eight driving wheels, and two axle four wheels without power guide wheels or slave wheels. Two sets of driving wheels have independent pistons and crank connecting rods.
  • Length: 89cm, Width: 8.5cm, Hight: 13.5cm.


Q1: What should you check when you receive new building blocks?

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New Building Blocks Checklist: Ensure Quality & SafetyWhen you receive new building blocks, it’s important to inspect them carefully to avoid missing pieces, damaged parts, or safety risks. Follow this checklist to guarantee a smooth and enjoyable building experience!
1. Inspect the Packaging & ContentsCheck for damage – Look for crushed or torn boxes during shipping.Verify the contents – Ensure all bricks, and accessories match the product description.
2. Examine Block Quality & CompatibilityMaterial safety – Avoid blocks with sharp edges or strong chemical smells.Color & print consistency – Look for fading, misprints, or scratches.Brick clutch power – Test if pieces connect and separate smoothly.Compatibility – If mixing sets, check if brick sizes and connectors align.
3. Check for Missing or Defective PartsCount key pieces – Compare with the instruction manual’s parts list.Test electronic parts – If your set includes motors, lights, or sensors, ensure they function.Look for defects – Warped, cracked, or malformed bricks should be replaced.
4. Review Safety & CertificationsAge-appropriate labeling – Ensure blocks are safe for the intended user (e.g., 3+, 6+, 12+).Safety certifications – Look for CE, ASTM, or ISO marks for child safety compliance.Small parts warning – Keep tiny pieces away from toddlers to prevent choking hazards.
5. Keep Documentation for SupportSave the manual – Digital or printed instructions are essential for assembly.Contact customer service – If pieces are missing, check the seller’s return or replacement policy.
Final Tip: Store Blocks Properly!Keep bricks in labeled containers or original packaging to prevent loss and make rebuilding easier.If your item arrives with any issues(e.g., shipping damage or missing parts) and please contact the LesDiy support team at lesdiylt@gmail.com.

Q2: Does this product come with an instruction manual? 

There is a difference between the instruction manuals for moc and mocsage. If you purchased moc, the instruction manual is on the product packaging box; simply scan the QR code to view it. If you purchased mocsage, the product packaging box contains a paper instruction manual.

Q3: How long does it take for the product to be delivered?

 Generally, the product will be delivered within one month, except in cases where the product has many parts or unforeseeable circumstances arise.

Q4: What brand of parts does the product use?

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                                             All parts used in our products are from Gobricks and Zhegao.

Replacement Parts Request

Replacement parts for missing or damaged MOC bricks

If you have received missing or damaged parts from your MOC brick set, please proceed as follows:

Required information:

  • Order number
  • Missing part (part number according to instructions)
  • Required quantity and color
  • Photo of the missing part or bag

How to request a replacement:

Send the information by email to: lesdiylt@gmail.com

We will review your request within 1-3 business days and ship the replacement parts as soon as possible.

⚠ A free reshipment service is available for each order. Damage due to improper use is excluded.

Thank you for your understanding and happy building!

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Customer Reviews

Based on 7 reviews
43%
(3)
57%
(4)
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V
Vincent Marotto
Its nice but hase some flaws.

The train looks good. I got a faulty battery box but they sent me ojt a new one. The connecting rods run a bit tight, bit some abs safe lubricant helped that. Lastly, numbering thr bags would be immensely helpful.. Those things dsid, I would still buy this again. It looks real nice and once runninh it goes well. The rubber tires allow it to travel well, and it moves nicely. The kit is hefty and quite large, and is satisfying to build. Im quite happy witht the kit. The biggest issue would be the bags, numbering them would be immensely helpful.

A
Adi T.
Good set, but some issues

I am very pleased with this set, especially with it’s aesthetics, however I have some gripes that I will list below:
1. Some pieces were missing. I was able to substitute with pieces I owned, but it should be noted that some pieces may be missing from the box. I don’t need these to be sent to me, because I already substituted them and I don’t mind it too much.
2. The tolerances on some pieces is too loose, and some of the pieces have slight curvature (mainly the larger plates). This issue can be dealt with and isn’t a dealbreaker either.
3. For whatever reason, my motors were the opposite polarity of each other, so placing them on the same spot on the IR receiver made them work against each other. This was a simple fix; I just placed them on different spots on the receiver. You could also open up the motor and swap the polarities if you are able, but I don’t recommend it unless you absolutely know what you are doing.

Outside of these relatively minor gripes, I have no issues with the set. It looks amazing and functions well. I can’t give it a perfect review, but I do highly recommend it for the price (especially with the discounts LesDiy provides). I also received a nice LesDiy tote bag as well as a set of MOC tools, such as a stud extractor/brick remover, rubber-tipped pliers, and a measuring space for bricks, axles, and Technic Bars. Great value, and a great week-long project.

G
G.B.
Excellent pieces

The model itself is an awesome display piece, but I would not recommend it for handling or running on a layout. Parts are super fragile and come off very easy, can be very difficult to get the wheels all lined on a track together. Also is near impossible to pickup the whole thing without another person to help or you will lose parts. It does run around normal Lego track but it certainly struggles and is extremely slow.

The only other major concern is the packaging. All the parts come unsorted in various bags. I spent about 2 hours sorting out the parts prior to the actual build. The build itself probably took around 8-10 hours and was pretty enjoyable.

C
C.
some issues

Great experience to build this model, but I have some troubles:
- the 2 two motor carriages were working against each other (resolved by just mirroring the front carriage when building it)
- some pieces were a little too loose to stay in place

On the positive side:
- instruction were easy to follow
- great look

Now, I have to buy tracks with a greater turning circle than the lego one (it's too small and don't look great when running ^^).

B
B.
Fair evaluation

The logistics is a bit slow, but the assembly process meets my requirements for the MOC train model