1. Product Overview
This MOC 4WD RC Car Chassis Kit is designed for enthusiasts who enjoy building and controlling their own off-road vehicles. Featuring a robust 4-wheel drive system, independent suspension, and dual control modes (physical remote control and smartphone app), this kit provides an engaging and challenging building experience followed by exciting off-road adventures. The design allows for significant articulation, enabling the car to tackle various terrains with a maximum body inclination of 90 degrees.


2. Package Contents
The kit is available in several bundles. Please verify your specific bundle against the list below:
- Bundle 1 - Full Car Set:
- Car Chassis Bricks Set (1)
- Black Wheels (4)
- XL Motor (2)
- Servo Motor (1)
- 8CH APP Remote Control Set (1)
- Bundle 2 - Car Chassis:
- Car Chassis Bricks Set (1)
- Bundle 3 - Black Wheels:
- Black Wheels (4)
- Bundle 4 - Green Wheels:
- Green Wheels (4)
- Bundle 5 - Power 1:
- XL Motor (2)
- Servo Motor (1)
- IR Remote Control (1)
- IR Receiver (1)
- Rechargeable lithium battery box (1)
- Bundle 6 - Power 2:
- XL Motor (2)
- Servo Motor (1)
- 8CH APP Remote Control Set (1)
3. Specifications
| Feature | Detail |
|---|---|
| Brand Name | wishiot |
| Model Numbers (Parts) | T0774, T0717, T0734 |
| Compatibility | For MOC Power Functions |
| Control Type | 8CH APP Remote Control / IR Remote Control (depending on bundle) |
| Drive System | 4WD (Four-Wheel Drive) |
| Suspension | Yes, with shocks |
| Max Car Body Inclination | 90° |
| Wheel Diameter | 107mm |
| Wheel Thickness | 44mm |
| Power Source | Rechargeable lithium battery box (included in Power bundles, not in basic chassis/wheel sets) |
| Recommended Age | 14+ years |
| Package Dimensions (approx.) | Length: 22 cm, Width: 17 cm, Height: 10 cm |
| Package Weight (approx.) | 0.363 kg |


4. Setup & Assembly
This kit requires assembly. Please follow the instructions carefully.
4.1 Obtaining Assembly Instructions
The detailed building diagram is provided in PDF format. Please contact the seller after receiving your order to obtain the high-definition electronic version of the PDF building diagram.
4.2 Assembly Steps (General Guidance)
- Unpack Components: Carefully unbox all parts and verify against the package contents list for your specific bundle. Pay attention to small parts.
- Follow PDF Diagram: Refer to the PDF building diagram for step-by-step assembly instructions. The kit consists of various technical bricks and components that need to be connected precisely.
- Motor and Servo Installation: Install the XL Motors and Servo Motor as indicated in the diagram. Ensure all connections are secure.
- Wheel Assembly: Attach the wheels to the chassis. Note that wheels are available in different colors (e.g., black, green).
- Power System Setup: If your bundle includes a rechargeable lithium battery box, install the battery and connect it to the power functions as per the diagram.
- Remote Control/Receiver Setup: Install the IR Receiver or prepare the 8CH APP Remote Control Set as per your bundle.


5. Operating Instructions
5.1 Charging the Battery
If your kit includes a rechargeable lithium battery box, connect it to a suitable USB power source using the provided USB cable. The indicator light on the battery box will show charging status (e.g., red for charging, green for fully charged).
5.2 Powering On
Once assembled and the battery is charged (if applicable), ensure all power connections are secure. Turn on the main power switch on the battery box or power functions unit.
5.3 Remote Control Operation
- IR Remote Control: If your bundle includes an IR Remote Control, ensure it has fresh batteries. Point the remote at the IR Receiver on the car. Use the joysticks and buttons to control the car's movement and functions.
- 8CH APP Remote Control: If your bundle includes the 8CH APP Remote Control Set, download the corresponding control app to your smartphone. Pair your phone with the car's control unit via Bluetooth or other specified method. Use the on-screen controls to operate the car.
5.4 Driving the Car
Start by practicing in an open, clear area. The 4WD system and suspension are designed for off-road climbing. Experiment with different terrains to understand the car's capabilities. The 8-channel control allows for precise movement and potentially other functions depending on the build.
6. Maintenance
- Cleaning: After off-road use, gently clean the chassis and wheels to remove dirt, dust, and debris. Use a soft brush or cloth. Avoid using water directly on electronic components.
- Battery Care: Always fully charge the rechargeable battery before storage and recharge it periodically (e.g., every 3 months) if not in use to maintain battery health. Do not overcharge or completely drain the battery.
- Component Check: Regularly inspect all connections, gears, and moving parts for wear or damage. Ensure all bricks are securely connected.
- Storage: Store the car and its components in a dry, cool place away from direct sunlight and extreme temperatures.
7. Troubleshooting
- Car does not move:
- Ensure the battery is charged and properly connected.
- Check that the power switch on the car is in the 'ON' position.
- Verify that the remote control (physical or app) is paired correctly and has power.
- Inspect all motor and servo connections for looseness.
- Loss of control/intermittent connection:
- Ensure you are within the operating range of the remote control.
- Check for interference from other electronic devices.
- For app control, ensure your phone's Bluetooth is active and the app is running correctly.
- Parts are loose or falling off:
- Re-examine the assembly steps in the PDF diagram to ensure all connections are firm.
- Small parts can be tricky; double-check their placement.
- Difficulty obtaining PDF instructions:
- If you have not received the PDF instructions, please contact the seller directly through the platform where you made your purchase. Provide your order details for faster assistance.
8. User Tips
- Request PDF Instructions Promptly: Many users have noted the importance of the PDF building diagram. Contact the seller immediately after receiving your kit to get the high-definition electronic version.
- Organize Small Parts: Before starting assembly, sort the small parts to avoid losing them and to streamline the building process.
- Test Components: If possible, test motors and power functions before full assembly to ensure they are working correctly.
- Patience is Key: Building MOC kits can be intricate. Take your time and enjoy the assembly process.
9. Warranty & Support
For any questions regarding assembly, operation, or missing parts, please contact the seller directly through the platform where you purchased the product. Provide your order number and a clear description of the issue for efficient support.