1. Introduction
Thank you for purchasing the Heng Long 1/16 Scale Russian T-90 Main Battle Tank. This remote-controlled tank is designed for hobbyists and enthusiasts, featuring realistic sound effects, smoke generation, and a functional BB firing mechanism. This manual provides essential information for safe operation, setup, and maintenance to ensure you get the most out of your product.
2. Safety Information
- This product is not suitable for children under 15 years of age. Adult supervision is recommended during operation.
- Always operate the tank in a safe, open area, away from people, pets, and obstacles.
- Do not aim the BB firing mechanism at people or animals. Always wear protective eyewear when operating the tank.
- Keep hands and loose clothing away from moving parts, especially the tracks and turret.
- Use only the provided charger and battery pack. Improper charging or battery usage can lead to fire or injury.
- Do not ingest smoke liquid or BB pellets. Keep them out of reach of small children.
3. What's in the Box
The package includes the following components:
- 1x Heng Long 1/16 Scale Russian T-90 Main Battle Tank
- 1x 2.4Ghz Radio Controller
- 1x Bag of BB Pellets
- 1x Bottle of Smoke Liquid
- 1x 7.4V 1800mAh Tank Battery Pack
- 1x 110V AC Charger
- Accessory Kits (various small parts for detailing)
- 1x English Instruction Manual Book
- 1x Infrared Combating System

4. Setup
4.1 Battery Installation
- Tank Battery: Open the battery compartment on the tank (usually located on the underside or rear). Connect the 7.4V 1800mAh battery pack and secure it in place. Close the compartment.
- Remote Controller Batteries: Open the battery cover on the back of the remote controller. Insert 6x AA batteries (not included) according to the polarity markings. Close the cover.
4.2 Smoke Liquid Filling
Locate the smoke unit's filling port on the tank (refer to the diagram in the included paper manual). Carefully use the dropper from the smoke liquid bottle to fill the smoke unit. Do not overfill.
4.3 BB Loading
Open the BB loading hatch on the turret. Carefully pour the BB pellets into the designated compartment. Ensure the hatch is securely closed before operation.
4.4 Accessory Attachment
Attach the various small accessories and detailing parts to the tank as desired. Some parts may require gentle force or a small amount of plastic glue for secure attachment.

5. Operating Instructions
5.1 Power On/Off
- Turn on the remote controller first. The indicator light should illuminate.
- Turn on the tank's power switch (usually located near the battery compartment). The tank will emit a start-up sound.
- To power off, reverse the sequence: turn off the tank, then the remote controller.
5.2 Remote Control Functions
The 2.4Ghz remote controller features various controls for realistic tank operation:
- Left Stick (Throttle): Controls forward/backward movement and speed.
- Right Stick (Steering): Controls left/right turning.
- Turret Rotation: Typically controlled by a dedicated button or joystick for 320-degree rotation.
- Barrel Elevation: Controls the barrel's up and down movement (approximately 30 degrees).
- BB Firing: Activates the airsoft BB firing mechanism.
- Machine Gun Sound: Triggers machine gun sound effects.
- Smoke On/Off: Activates or deactivates the smoke generator.
- Sound Effects: Switches between different engine and battle sound effects.

5.3 Driving and Maneuvering
Use the left and right joysticks to control the tank's movement. The TK7.0 system offers proportional control for precise driving. The tank is designed to handle various terrains, including rocky surfaces and sand, as demonstrated in the videos below.
Video: A 36-second demonstration of the 1/16 Henglong Russia T90 RC Battle Tank Toy in action, showcasing its movement and features.
Video: A 47-second overview of the Remote Control 2.4Ghz TK7.0 1/16 Russian T-90 RC Tank, highlighting its operational capabilities.
Video: A 41-second clip demonstrating the 1/16 scale RC Tank Russian T-90 Main Battle Tank navigating various terrains and showcasing its features.
6. Maintenance
6.1 General Cleaning
Regularly clean the tank's exterior with a soft, dry cloth. Avoid using water or harsh chemicals, as this can damage electronic components. Pay special attention to cleaning the tracks to prevent debris buildup.
6.2 Battery Care
- Always fully charge the tank battery before first use and after each play session.
- Do not overcharge or completely drain the battery.
- Store batteries in a cool, dry place away from direct sunlight and extreme temperatures.
- Remove batteries from the remote controller if not in use for extended periods.
6.3 Smoke Unit Maintenance
Ensure the smoke unit is clean and free of blockages. If smoke production decreases, check the liquid level and clean the nozzle if necessary. Use only approved smoke liquid.
6.4 Track Maintenance
Periodically inspect the tracks for any damage or debris. Ensure they are properly aligned and tensioned. If tracks frequently come off, a simple modification or replacement with metal tracks might be necessary (as noted by some users).
7. Troubleshooting
- Tank not responding: Check battery levels in both the tank and remote controller. Ensure both are powered on and properly paired.
- No smoke production: Verify smoke liquid level. Ensure the smoke function is enabled on the remote.
- BBs not firing: Check if BBs are loaded correctly and the firing mechanism is enabled. Ensure the safety mode is off.
- Speaker unit issues (no sound): If the speaker unit stops producing sound, it may be damaged. Contact customer support for replacement options.
- Tracks slipping or coming off: Inspect tracks for damage or excessive wear. Ensure proper tension. Consider upgrading to metal tracks for improved durability on rough terrain.
- Instructions unclear: The included paper manual may have translation nuances. Refer to online resources or manufacturer's support for clearer guidance if needed.
8. Specifications
| Brand Name | Heng Long |
| Model Number | 3938-1 |
| Model Name | T-90 |
| Scale | 1:16 Scale |
| Material Type | Metal, Plastic |
| Power Source | Battery Powered |
| Battery Description | Lithium-Ion Polymer (7.4V 1800mAh) |
| Operation Mode | Remote Control (2.4Ghz TK7.0 System) |
| Additional Features | Realistic Sound, Smoke Generation, BB Firing, Infrared Combating System |
| Item Dimensions | 23 x 8 x 9 inches |
| Item Weight | 9 Pounds |
| Manufacturer Minimum Age | 168 Months (14 Years) |
9. Warranty and Support
For warranty information, technical support, or replacement parts, please refer to the contact details provided by your retailer or visit the official Heng Long website. Keep your purchase receipt as proof of purchase.