1. Introduction
This manual provides essential information for the safe and effective use of your LONTEK 3-in-1 Foldable Treadmill, Model U18F. Please read it thoroughly before operating the device and retain it for future reference.
1.1 Important Safety Information
- Always consult with a physician before starting any new exercise program.
- Keep children and pets away from the treadmill during operation.
- Place the treadmill on a flat, stable surface with adequate clearance around it.
- Ensure the safety key is properly attached before starting the treadmill.
- Do not operate the treadmill if it is damaged or malfunctioning.
- Wear appropriate athletic footwear during use.
- The maximum user weight capacity for this treadmill is 300 lbs.
2. Product Features
The LONTEK U18F treadmill offers a versatile and compact solution for home and office fitness. Key features include:
- 3-in-1 Design: Functions as a walking pad, under-desk treadmill, and traditional treadmill with a handlebar.
- High Weight Capacity: Supports users up to 300 lbs.
- Adjustable Incline: Features a 15% incline option to simulate varied terrain and increase calorie burn.
- Quiet Operation: Equipped with a 2.5 HP brushless motor, operating below 45 dB for minimal disturbance.
- Advanced Running Belt: 6-layer non-slip running belt with an advanced shock absorption system to reduce joint impact.
- Space-Saving Foldable Design: Ultra-slim profile (4.3 inches when folded) for easy storage under furniture.
- Portability: Front transport wheels allow for effortless relocation.
- Speed Range: Adjustable speed from 0.6 to 6.2 MPH.

Image: The LONTEK U18F treadmill demonstrating its versatility as both an incline walking pad and a traditional treadmill.

Image: Visual representation of calorie expenditure at 0%, 10%, and 15% incline settings.
3. Package Contents
Upon unpacking, please ensure all items listed below are present and in good condition:
- LONTEK 3-in-1 Foldable Treadmill (Model U18F)
- Remote Control
- Safety Key
- User Manual (this document)
- Power Cord
- Lubricant (if included)
4. Setup
The LONTEK U18F treadmill requires minimal assembly. It arrives largely pre-assembled.
4.1 Unfolding the Treadmill
- Carefully remove the treadmill from its packaging.
- Place the treadmill on a flat, level surface.
- To raise the handlebar, gently lift it until it locks into the upright position. Ensure both sides are securely locked.
- Connect the power cord to the treadmill and then to a grounded electrical outlet.

Image: Illustration of the treadmill's portable and foldable design, showing how the handlebar can be raised or lowered.
4.2 Folding for Storage
- Ensure the treadmill is turned off and unplugged.
- Release the locking mechanism for the handlebar (refer to specific product diagram if available).
- Gently lower the handlebar until it rests flat against the running deck.
- Utilize the front transport wheels to move the folded treadmill to your desired storage location, such as under a bed or sofa.

Image: The treadmill in its folded state, demonstrating ease of storage and movement.
5. Operation
5.1 Control Panel and Remote Control
The treadmill can be operated using the integrated control panel or the included remote control. The display shows Time, Speed, Distance, and Calories burned.

Image: The treadmill's control interface, showing both the integrated display and the remote control.
5.2 Starting and Stopping
- Attach the safety key to the designated slot on the control panel and clip the other end to your clothing. The treadmill will not operate without the safety key.
- Press the START button on the control panel or remote control. The treadmill will begin with a low speed.
- To stop, press the STOP button or pull the safety key.
5.3 Adjusting Speed and Incline
- Use the + and - buttons on the control panel or remote control to increase or decrease the speed. The speed range is 0.6 to 6.2 MPH.
- The treadmill features a 15% incline adjustment. Refer to the specific incline adjustment mechanism on your unit (e.g., manual adjustment or remote control button if available).

Image: Operating the treadmill with the remote control to adjust speed and monitor workout data.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your treadmill.
6.1 Cleaning
- Always unplug the treadmill before cleaning.
- Wipe down the console and exterior surfaces with a soft, damp cloth. Avoid abrasive cleaners.
- Periodically vacuum under the treadmill to prevent dust buildup.
6.2 Running Belt Lubrication
The running belt requires periodic lubrication to reduce friction and extend its lifespan. Refer to the specific instructions provided with your lubricant or contact customer support for guidance. Generally, apply lubricant every 3-6 months depending on usage.
6.3 Belt Tension and Alignment
If the running belt feels loose, slips, or drifts to one side, it may need adjustment. Consult the detailed instructions in the included user manual or contact customer support for assistance. Incorrect adjustment can damage the treadmill.
7. Troubleshooting
If you encounter issues with your treadmill, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Treadmill does not start. | Power cord not plugged in; Safety key not in place; Power switch off. | Ensure power cord is securely plugged in; Insert safety key; Turn on power switch. |
| Running belt slips or hesitates. | Belt too loose; Belt needs lubrication. | Adjust belt tension (refer to manual); Lubricate the running belt. |
| Unusual noise during operation. | Loose parts; Belt rubbing; Motor issue. | Check for loose screws; Adjust belt alignment; Contact customer support if noise persists. |
| Display not working. | Loose connection; Power issue. | Check all connections; Ensure power supply is stable. |
If the problem persists after attempting these solutions, please contact LONTEK customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | LONTEK |
| Model Number | U18F |
| Product Dimensions (D x W x H) | 45"D x 20"W x 4.5"H |
| Material | Metal (Iron Frame) |
| Maximum Speed | 6.2 Miles per Hour |
| Minimum Speed | 0.6 Miles per Hour |
| Maximum Horsepower | 2.5 HP |
| Maximum Incline Percentage | 15.0% |
| Maximum Weight Recommendation | 300 Pounds |
| Metrics Measured | Distance |
| Power Source | Corded Electric |
| Assembly Required | No |

Image: Detailed dimensions of the treadmill's running track and overall footprint.
9. Warranty and Support
Your LONTEK U18F Treadmill comes with a 1-Year Warranty from the date of purchase, covering manufacturing defects.
For any questions, technical assistance, or warranty claims, please contact our dedicated support team. You can find contact information on the product packaging or the official LONTEK website. We also offer comprehensive resources like maintenance videos and user manuals to ensure you get the most out of your product.




