1. Introduction
This instruction manual provides detailed guidance for assembling and enjoying your SEMBO 4-in-1 Rotary Drilling Rig Building Blocks set. This versatile set allows you to construct four different engineering vehicles: an Excavator, a Truck Mounted Crane, a Telescopic Crawler Crane, and a Multifunctional Crawler Crane. These models can then be combined to form a large Rotary Drilling Rig. Designed for ages 6 and up, this set promotes creativity, problem-solving skills, and an understanding of mechanical aesthetics.

2. Safety Information
- WARNING: Keep away from fire. Do not eat the building blocks.
- This product contains small parts and is not suitable for children under 3 years old due to choking hazards.
- California Proposition 65 Warning: This product can expose you to chemicals including phthalates (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Package Contents
Please verify that all components are present upon opening the package. The set includes over 884 pieces of building blocks.
- 1 x Set of Building Blocks (884+ pieces)
- 1 x Instruction Manual
Note: The product is available with or without a retail box. Please refer to your purchase details.
4. Assembly Instructions
This building block set allows for the construction of four distinct engineering vehicles, which can then be combined into a larger Rotary Drilling Rig. Follow the step-by-step instructions provided in the included printed manual for each model.
4.1 General Assembly Guidelines
- Organize your blocks by color and shape before starting to simplify the building process.
- Refer to the included instruction booklet for detailed, model-specific assembly steps.
- Ensure blocks are tightly spliced to prevent loosening during play.
4.2 Individual Models
The set can be used to build the following models:
- Excavator: Consists of 248 pieces. Features movable parts for realistic play.
- Truck Mounted Crane: Consists of 184 pieces. Designed with a restored front end shape and a functional crane.
- Telescopic Crawler Crane (STB260T4): Consists of 235 pieces. Features an adjustable boom and smooth track design.
- Multifunctional Crawler Crane: Consists of 217 pieces. Equipped with a functional crane mechanism.


4.3 Combining into Rotary Drilling Rig (SR155)
Once the individual models are built, they can be merged and transformed into the larger Rotary Drilling Rig (SR155). This transformation integrates the components to create a complex and impressive construction vehicle.


5. Operation
The SEMBO building block models are designed for interactive play, allowing users to simulate real-world construction scenarios.
- Excavator: Maneuver the arm and bucket to simulate digging and lifting operations.
- Cranes (Truck Mounted, Telescopic, Multifunctional): Extend and retract the crane booms, and operate the hooks to lift and move small objects. The Telescopic Crawler Crane features an adjustable boom for varied reach.
- Rotary Drilling Rig: Simulate drilling operations by manipulating the drilling mechanism. The crawler tracks allow for movement across surfaces.
All models feature smooth track designs and robust construction for dynamic play.

6. Care and Maintenance
- Cleaning: Wipe the blocks with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, followed by immediate drying. Do not immerse in water.
- Storage: Store the building blocks and assembled models in a cool, dry place away from direct sunlight to prevent material degradation and color fading.
- Handling: Avoid excessive force when assembling or disassembling to prevent damage to the blocks.
7. Troubleshooting
7.1 Missing Parts
If you discover any missing parts during assembly, please contact customer service. We will arrange to resend the necessary parts to you.
7.2 Assembly Difficulties
- Double-check the instruction manual for the correct placement of blocks.
- Ensure blocks are oriented correctly and fully pressed together for a secure fit.
- If a section is particularly challenging, try disassembling and reassembling that specific part carefully.
8. Specifications
| Attribute | Detail |
|---|---|
| Brand Name | SEMBO BLOCK |
| Model Number | Rotary Drilling Rigs Assembly Building Blocks |
| Number of Pieces | 884+ PCS |
| Material | ABS Plastic |
| Block Size | Small building block (Compatible with Lego) |
| Plastic Block Shape | Self-Locking Bricks |
| Recommend Age | 6-12Y, 14+y, 18+ |
| Certification | CE |
| Is Electric | No Battery |
| Package Length | 25 cm |
| Package Width | 20 cm |
| Package Height | 6 cm |
| Package Weight | 0.487 kg |
9. User Tips
- This toy is excellent for developing skills in STEM education, enhancing creativity, and fostering an understanding of mechanical principles.
- The small building blocks are compatible with major brands like Lego, allowing for integration with existing collections and expanding creative possibilities.
- Consider this set as a thoughtful gift for various occasions, including Children's Day, holidays, birthdays, Christmas, and New Year. It's suitable for both boys and girls.
10. Warranty and Support
SEMBO BLOCK is committed to providing high-quality products and customer satisfaction.
- Free Replacement Parts: In case of any missing parts, please contact our customer service for free replacement.
- Customer Assistance: If you have any questions or require assistance after receiving your package, please contact us promptly. We are here to help.





