1. Introduction
This manual provides detailed instructions for the assembly, setup, operation, and maintenance of your Tamiya 1/10 RC Racing Fighter (DT-03 chassis) model 58628. The Tamiya Racing Fighter is an entry-level 1:10 scale remote control buggy designed for off-road driving. It features a robust DT-03 chassis, independent suspension, differential, and oil pressure shock absorbers. Please read this manual thoroughly before beginning assembly or operation to ensure safe and correct use of the product.
2. Safety Information
- Adult Supervision: This product is a hobby-grade remote control vehicle kit and requires assembly. Adult supervision is recommended during assembly and operation, especially for younger users.
- Battery Safety: Always use the correct type of battery and charger as specified by the manufacturer. Follow all battery charging and handling instructions to prevent fire, injury, or damage. Disconnect the battery when not in use.
- Operating Environment: Operate the RC car in open areas free from obstacles, people, and pets. Avoid public roads, crowded areas, and wet conditions.
- Moving Parts: Keep fingers, hair, and loose clothing away from moving parts such as wheels, gears, and the motor to prevent injury.
- Electrical Components: Ensure all electrical connections are secure and properly insulated. Avoid contact with water to prevent short circuits and damage.
- Modifications: Do not modify the product in ways not specified by Tamiya, as this may compromise safety and performance.
3. Package Contents
The Tamiya Racing Fighter (DT-03 chassis) model 58628 is a kit that requires complete assembly. The package typically includes:
- DT-03 Chassis components
- Polycarbonate body shell
- Electric motor
- Electronic Speed Controller (ESC)
- Oil pressure shock absorbers
- Wheels and tires
- Hardware (screws, nuts, bearings, etc.)
- Instruction manual for assembly
Note: The following items are not included and must be purchased separately:
- 2-channel RC system (transmitter and receiver)
- Steering servo
- 7.2V battery pack
- Compatible battery charger
- PS paint for polycarbonate body
4. Assembly
The Tamiya Racing Fighter is a model kit that requires complete assembly. Refer to the detailed assembly manual included in your product package for step-by-step instructions. The general assembly process involves:
- Chassis Construction: Assemble the main DT-03 chassis frame, ensuring all components are securely fastened.
- Suspension Assembly: Build and install the independent suspension arms, oil pressure shock absorbers, and steering linkages.
- Gearbox and Differential: Assemble the gearbox and differential unit, ensuring proper lubrication of gears.
- Motor Installation: Mount the electric motor into the gearbox assembly.
- Wheel and Tire Mounting: Attach the wheels and tires to the suspension.
- Electronics Installation: Install the Electronic Speed Controller (ESC) and steering servo into the chassis. Connect the motor to the ESC.
- Body Preparation: Cut out and paint the polycarbonate body shell according to your desired design. Apply decals as instructed.
- Final Assembly: Mount the finished body shell onto the chassis.

Image: Top-down view of the DT-03 chassis, showing the layout of the battery, ESC, receiver, and motor. This illustrates the internal component placement during assembly.

Image: Detailed view of the rear suspension, motor, and gearbox assembly. This highlights key mechanical components during the build process.
5. Initial Setup
After completing the assembly of your Tamiya Racing Fighter, follow these steps to prepare it for operation:
- Charge Battery: Fully charge your 7.2V battery pack using a compatible charger. Refer to your battery and charger manuals for specific instructions.
- Install Battery: Carefully install the charged 7.2V battery into the battery compartment of the Racing Fighter chassis. Ensure it is secured.
- Connect RC System: Connect your 2-channel radio receiver to the Electronic Speed Controller (ESC) and steering servo as per the wiring diagram in your assembly manual.
- Bind Radio: Follow the instructions provided with your 2-channel radio system to bind the transmitter to the receiver in the Racing Fighter. This establishes communication between the controller and the car.
- Initial Checks: Before turning on the car, ensure the transmitter's throttle trim is centered and the steering trim is neutral.
- Power On: Turn on your transmitter first, then turn on the power switch on the Racing Fighter.
- Function Test: Test the steering and throttle response. Ensure the steering turns correctly (left for left, right for right) and the throttle provides forward and reverse movement. Adjust steering trim if the wheels are not straight.

Image: The fully assembled Tamiya Racing Fighter, ready for initial setup and operation.
6. Operating Instructions
Once your Tamiya Racing Fighter is assembled and set up, you can begin operating it.
- Starting: Always turn on your transmitter first, then the RC car.
- Driving: Use the throttle trigger on your transmitter to control forward and reverse movement. Use the steering wheel/joystick to control left and right turns.
- Braking: Pushing the throttle trigger forward (opposite of acceleration) typically engages the brake. A second push may engage reverse.
- Operating Environment: Choose a safe, open area for driving, away from people, animals, and obstacles. The Racing Fighter is designed for off-road use on dirt, grass, or gravel.
- Range: Be aware of the operating range of your RC system. Do not drive the car out of sight or beyond the effective range of your transmitter.
- Stopping: To stop operation, first turn off the RC car's power switch, then turn off your transmitter.

Image: The Tamiya Racing Fighter (foreground) and another RC buggy operating on an outdoor dirt track.
7. Maintenance
Regular maintenance will ensure the longevity and optimal performance of your Tamiya Racing Fighter.
- Cleaning: After each use, especially after driving in dusty or dirty conditions, clean the chassis and body. Use a soft brush or compressed air to remove dirt and debris. Avoid using water directly on electronics.
- Inspection: Regularly inspect all screws, nuts, and linkages for looseness. Tighten as necessary. Check for any damaged or worn parts.
- Gearbox: Periodically open the gearbox to inspect gears for wear and re-lubricate with appropriate grease.
- Shocks: Check the oil pressure shock absorbers for leaks and proper function. Refill or replace shock oil as needed.
- Tires: Inspect tires for wear and damage. Replace worn tires for optimal traction.
- Battery Storage: Store batteries in a cool, dry place, and follow manufacturer guidelines for long-term storage (e.g., storage charge).
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Car does not respond to transmitter. |
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| Steering is erratic or unresponsive. |
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| Motor runs but wheels do not turn. |
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| Reduced run time or power. |
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9. Specifications
| Feature | Detail |
|---|---|
| Model Number | 58628 |
| Chassis Type | DT-03 |
| Scale | 1:10 Scale |
| Product Dimensions | 40 x 24.4 x 13.4 cm; 1.8 kg |
| Material Type | Polycarbonate (PC) |
| Assembly Required | Yes |
| Batteries Required | Yes (not included) |
| Remote Control Included | No |
| Educational Objective | Teach model assembly, R/C vehicle operation, and basic engineering principles |
10. Warranty & Support
For detailed warranty information and customer support, please refer to the official Tamiya website or contact your local Tamiya distributor. Keep your proof of purchase for any warranty claims.
Tamiya Official Website: www.tamiya.com





