1. Introduction
This manual provides essential information for the setup, operation, and maintenance of your Hornby TT:120 LNER Class A4 4-6-2 4468 'Mallard' steam locomotive. This highly detailed model is a replica of the famous A4 locomotive, 4468 Mallard, renowned for its world record speed. The Hornby TT:120 range features a 1:120 scale, making it suitable for 'tabletop' model railway layouts.
Understanding the scale and gauge is crucial for integrating your locomotive into an existing layout or planning a new one. This model operates on TT gauge track.

Image 1: Visual comparison of different model railway gauges, highlighting the TT:120 scale (1:120) of this locomotive.
2. Safety Information
- This product is a detailed scale model and is not suitable for children under 14 years of age.
- Always refer to the enclosed instruction leaflet for additional safety notes.
- Keep small parts away from young children to prevent choking hazards.
- Ensure the model is handled with care to prevent damage to delicate components.
3. Package Contents
Upon unpacking, please verify that all components are present and undamaged:
- 1 x Hornby TT:120 LNER Class A4 4-6-2 4468 'Mallard' Steam Locomotive
- Instruction Leaflet

Image 2: Side view of the Hornby TT:120 'Mallard' locomotive, showcasing its detailed blue livery and wheel configuration.
4. Setup
Assembly is required for this model. Carefully unpack the locomotive and its tender from the packaging. Ensure you have a clean, flat surface to work on.
- Track Preparation: Ensure your model railway track is clean, level, and correctly assembled for TT gauge (1:120 scale). Uneven track can lead to operational issues.
- Connecting Tender: Gently connect the locomotive to its tender. Refer to the specific instructions in the enclosed leaflet for the correct coupling mechanism. Avoid forcing connections.
- Placing on Track: Carefully place the locomotive and tender onto the track, ensuring all wheels are correctly seated on the rails.

Image 3: Detailed view of the locomotive's front wheels and underframe, important for proper track placement.

Image 4: Close-up of the tender, showing its connection point to the locomotive.
5. Operating Instructions
The Hornby TT:120 'Mallard' locomotive operates in manual mode. It is available in analogue, DCC-ready, and DCC-fitted versions. Ensure your control system is compatible with your specific model.
- Power Connection: Connect your power controller to the track as per your model railway system's instructions.
- Speed Control: Gradually increase power to the track using your controller. Observe the locomotive's movement.
- Direction Control: Use the direction switch on your controller to change the locomotive's direction.
- Smooth Operation: For optimal performance, operate the locomotive at a consistent speed. Avoid sudden acceleration or deceleration.

Image 5: The 'Mallard' locomotive positioned on a track, ready for operation.

Image 6: The 'Mallard' locomotive in motion on a detailed model railway layout.
6. Maintenance
Regular maintenance ensures the longevity and smooth operation of your locomotive.
- Cleaning: Periodically clean the wheels and track with a soft, lint-free cloth to remove dust and debris. Use a specialized track cleaner if necessary.
- Lubrication: Refer to the enclosed instruction leaflet for specific lubrication points and recommended lubricants. Over-lubrication can attract dust.
- Storage: When not in use, store the locomotive in its original packaging or a protective case to prevent dust accumulation and accidental damage.
7. Troubleshooting
If you encounter issues with your locomotive, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Locomotive does not move or moves erratically. | Lack of power, dirty track/wheels, poor electrical contact. | Check power supply, clean track and locomotive wheels, ensure all connections are secure. |
| Locomotive derails frequently. | Uneven track, tight curves, foreign objects on track, delicate front bogie clearance. | Ensure track is level and securely joined. Inspect for obstructions. This model can be sensitive to track level around bends; adjust track layering to improve clearance. |
| Unusual noises during operation. | Lack of lubrication, debris in moving parts, damaged gears. | Lubricate according to instructions. Inspect for visible debris and carefully remove. If noise persists, contact support. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | HORNBY |
| Model Number | TT3007M |
| Scale | TT:120 (1:120) |
| Gauge | TT Gauge |
| Locomotive Type | Steam (LNER Class A4 4-6-2 4468 'Mallard') |
| Era | 3 - Grouping |
| Material Type | Metal Plastic |
| Item Dimensions (L x W) | 11.61" x 2.68" |
| Item Weight | 0.37 Kilograms |
| Operation Mode | Manual |
| Assembly Required | Yes |
| Minimum Age Recommendation | 14 years |
| Included Components | 1 x Steam Locomotive |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your product or visit the official Hornby website. Keep your proof of purchase for any warranty claims.
For further assistance, you may contact Hornby customer service directly through their official channels.
