Introduction
This manual provides detailed instructions for assembling and operating your Sparkleiot MOC High-tech 4 Speed Gearbox Model. This DIY transmission kit is designed for enthusiasts of building blocks and mechanical functions, offering an educational experience in understanding gear mechanisms. Please read all instructions carefully before beginning assembly.
Safety Information
This product contains small parts. Keep out of reach of young children to prevent choking hazards. Adult supervision is recommended during assembly and operation, especially for users under the manufacturer's recommended age of 18 years.
What's in the Box
Your package includes the following components:
- 1 set of gearbox building bricks (loose parts)

Image: Assorted building bricks, representing the loose parts included in the kit, ready for assembly.
Setup: Assembly Instructions
The Sparkleiot 4 Speed Gearbox Model is a DIY kit. Assembly is required. Follow these general steps to construct your gearbox. Refer to the provided images for visual guidance on component placement and overall structure.
- Identify Components: Sort all loose parts. Familiarize yourself with the various beams, axles, gears (red, grey, black), and connectors.
- Build the Base Structure: Begin by constructing the main frame using the longer black beams and blue pins to create a stable foundation.
- Assemble Gear Shafts: Insert axles through the frame, ensuring they are correctly aligned to support the gears.
- Mount Gears: Place the red and grey gears onto the axles according to the desired gear ratios for each speed. Ensure gears mesh correctly. The red gears typically represent the primary drive gears, while grey gears are driven or idler gears.
- Integrate Shifting Mechanism: Construct the shifting mechanism using the black and red lever components. This mechanism will allow you to engage different gear combinations for varying speeds.
- Connect Output Shaft: Ensure the output shaft is correctly installed and connected to the final gear in the transmission sequence.
- Final Checks: Verify that all connections are secure and that the gears rotate freely without obstruction. Test the shifting mechanism to ensure it engages each speed smoothly.

Image: The fully assembled Sparkleiot 4 Speed Gearbox Model, showcasing its intricate gear system and shifting lever.

Image: A detailed close-up of the gearbox's internal mechanism, highlighting the meshing of red and grey gears on their respective axles.
Operating the Gearbox
This 4-speed gearbox model is designed to demonstrate mechanical transmission principles. It can be integrated with compatible M motors and battery cases (sold separately) to power its functions.
- Manual Shifting: Use the black lever on top of the gearbox to manually shift between the four available speeds. Observe how different gear combinations engage with each shift.
- Motor Integration: To operate the gearbox with power, connect an M motor to the input shaft of the gearbox. Connect the M motor to a compatible battery case.
- Power Function: Once powered, the motor will drive the gearbox, allowing you to observe the transmission of power and speed changes as you shift gears.

Image: The Sparkleiot 4 Speed Gearbox Model shown connected to an external M motor and a battery case, demonstrating its compatibility with power functions.
Maintenance
To ensure the longevity and proper function of your gearbox model, follow these maintenance guidelines:
- Cleaning: Dust the model regularly with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, followed by immediate drying. Avoid harsh chemicals.
- Storage: Store the model in a cool, dry place away from direct sunlight and extreme temperatures to prevent material degradation.
- Inspection: Periodically check for any loose connections or worn parts. Re-secure any loose pins or axles.
Troubleshooting
If you encounter issues with your gearbox model, consider the following:
- Gears Not Meshing: Ensure all gears are correctly aligned on their axles and that no pins or beams are obstructing their movement.
- Shifting Difficulty: Check the shifting mechanism for any misaligned parts or excessive friction. Lubrication is generally not required for building block components.
- Motor Not Driving: If using a motor, verify that the motor is correctly connected to the gearbox input shaft and that the battery case has sufficient power.
- Loose Parts: If the model feels unstable, re-examine all connections and ensure pins are fully inserted into their respective holes.
Specifications
| Feature | Detail |
|---|---|
| Product Name | MOC 4 Speed Gearbox Model |
| Brand | Sparkleiot |
| Material | ABS Plastic |
| Product Dimensions | 4 x 2 x 2 inches |
| Item Weight | 2.08 ounces |
| Recommended Age | 18 years and up |
| Compatibility | M motor and battery case (sold separately) |
Warranty and Support
This product does not come with an explicit manufacturer's warranty statement in the provided information. For any product-related inquiries, missing parts, or support, please contact the seller, Sparkleiot, directly through their official store page on Amazon or the platform where the purchase was made.
You can visit the Sparkleiot Store for further assistance: Sparkleiot Store





