1. Product Overview
This manual provides instructions for assembling and understanding the Wishiot MOC 4WD Four-wheel Drive Chassis with Independent Suspension, Differential, Steering Axle, and Motor Building Blocks. This set allows you to construct a functional chassis for a technical car model, compatible with other small building block systems.

2. Specifications
| Attribute | Detail |
|---|---|
| Brand Name | Wishiot |
| Model No | D263 |
| Type | Assembly Bricks |
| Block Size | Small building block (Compatible with Lego) |
| Material | Plastic |
| Recommended Age | 14+ years |
| Is Electric | No Battery (motor included, but external power source required) |
| Chassis Dimensions | Approx. 42x22x13 dots (assembled) |
3. Safety Information
⚠ 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.
- Keep small parts away from children under 3 years old to prevent choking hazards.
- Adult supervision is recommended during assembly.
- Do not ingest any parts.
4. Assembly Instructions (Setup)
This building block set is designed for enthusiasts aged 14 and above. The assembly process involves connecting various technical components to form a functional 4WD chassis. While specific step-by-step instructions are typically provided within the product packaging, the following diagrams illustrate key sections of the chassis to aid in understanding and construction.
4.1 Chassis Frame Assembly
Begin by constructing the main frame of the chassis, ensuring all connection points are secure. Pay attention to the orientation of the long beams and connectors.


4.2 Independent Suspension and Axle Integration
Assemble the independent suspension components for each wheel. Ensure the differential gears are correctly installed within the axle housings to allow for proper power distribution and steering.


4.3 Motor and Steering Mechanism
Integrate the motor into the chassis, typically connected to the differential. Assemble the steering mechanism, ensuring smooth movement and connection to the front axle.

Once all components are assembled, verify that the wheels turn freely, the suspension articulates, and the steering mechanism operates correctly.
5. Operating Instructions
This MOC chassis is designed as a base for a technical car model. It includes a motor but does not come with a power source (battery) or remote control components. To operate the chassis as a functional vehicle, you will need to integrate your own power functions (e.g., battery box, receiver, remote control) and potentially additional motors for drive and steering, depending on your desired functionality.
- Powering the Motor: Connect the included motor to a compatible power source (e.g., a LEGO Power Functions battery box or similar).
- Steering: If using a steering motor, connect it to the steering axle mechanism.
- Testing: After connecting power, test the drive and steering functions to ensure all gears and linkages are working smoothly.
Note: This product is a building block set for the chassis only. Additional components for full remote control functionality are sold separately.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the building blocks. Avoid harsh chemicals or abrasive materials.
- Storage: Store the assembled chassis or individual blocks in a cool, dry place away from direct sunlight to prevent material degradation.
- Inspection: Periodically inspect connections for looseness. Re-secure any loose parts to maintain structural integrity.
- Lubrication: For optimal performance of gears and moving parts, a small amount of plastic-safe lubricant can be applied if needed, though typically not required for standard building block sets.
7. Troubleshooting
- Chassis not moving smoothly:
- Check all gear connections for proper alignment.
- Ensure no parts are rubbing or obstructing movement.
- Verify that the motor is correctly connected and receiving power (if applicable).
- Steering not working:
- Inspect steering linkages for any disconnections or obstructions.
- Ensure the steering motor (if used) is properly installed and connected.
- Parts are loose or falling off:
- Re-examine the assembly steps for the affected section.
- Ensure all pins and connectors are fully inserted.
- Missing parts:
- Carefully check the packaging and work area.
- If parts are genuinely missing, contact the seller for assistance.
8. User Tips
- Organize Parts: Before starting assembly, sort the building blocks by type and color. This will significantly speed up the building process.
- Follow Diagrams Carefully: Pay close attention to the diagrams in the instruction manual. Even small details like pin orientation can affect functionality.
- Test as You Go: After completing major sections (e.g., an axle assembly), test its movement and functionality before proceeding to the next section. This helps identify and correct errors early.
- Customization: This MOC chassis is an excellent foundation for custom builds. Feel free to experiment with adding your own bodywork or additional functions once the core chassis is complete.
9. Warranty and Support
For any issues regarding missing parts, defective components, or assembly difficulties, please contact the seller directly through the platform where the purchase was made. Provide your order number and a clear description or photos of the issue for prompt assistance.
The manufacturer, Wishiot, stands behind the quality of its products. While specific warranty periods may vary, customer satisfaction is a priority. Please retain your proof of purchase for any support inquiries.