Ultra-Tow 3806S108
Ultra-Tow 5ft. x 8ft. Aluminum Utility Trailer Kit
Instruction Manual - Model 3806S108
Introduction
This manual provides essential instructions for the assembly, operation, maintenance, and troubleshooting of your Ultra-Tow 5ft. x 8ft. Aluminum Utility Trailer Kit. Please read this manual thoroughly before assembly and use to ensure safe and efficient operation. Retain this manual for future reference.
The Ultra-Tow Aluminum Utility Trailer Kit features a rustproof aluminum frame and a large 5ft. x 8ft. bed, designed to handle loads up to 1,715 lbs. with a maximum Gross Vehicle Weight Rating (GVWR) of 1,980 lbs.

Figure 1: Overview of the Ultra-Tow Aluminum Utility Trailer Kit, highlighting key features such as the rustproof aluminum frame, 5ft. x 8ft. bed, 1715-lb. capacity, 2-inch coupler, safety chain harness, and aluminum wheel fenders.
Safety Information
Always prioritize safety when assembling, operating, or maintaining your trailer. Failure to follow safety guidelines can result in serious injury or property damage.
- Read and understand all instructions before assembly and use.
- Wear appropriate personal protective equipment (PPE) during assembly, including gloves and eye protection.
- Ensure all fasteners are securely tightened before each use.
- Do not exceed the trailer's maximum payload capacity of 1,715 lbs. or the GVWR of 1,980 lbs.
- Distribute loads evenly on the trailer bed to maintain stability.
- Always use safety chains when towing.
- Regularly inspect tires, lights, and connections before towing.
- Be aware of speed limitations; the tires are rated for a maximum speed of 55 mph.
Setup and Assembly
The Ultra-Tow Utility Trailer is provided as a kit requiring assembly. Follow the detailed instructions provided in the separate assembly guide that accompanies your product. General steps include:
- Unpacking: Carefully unpack all components and verify against the parts list. Report any missing or damaged parts immediately.
- Frame Assembly: Assemble the aluminum frame components using the provided hardware. Ensure all bolts are tightened to the specified torque.
- Axle and Wheel Installation: Attach the axle assembly and install the wheels. Ensure bearings are properly greased and wheel nuts are torqued correctly.
- Fender and Light Installation: Mount the aluminum wheel fenders and install the tail lights and wiring harness.
- Coupler and Safety Chain: Attach the 2-inch coupler and safety chains to the tongue of the trailer.
While the assembly process is designed to be straightforward, it is recommended to have assistance, especially when handling larger components or flipping the frame. Ensure all connections are secure before proceeding to operation.

Figure 2: The assembled aluminum frame of the Ultra-Tow Utility Trailer, ready for use or further customization.
Operating Instructions
Proper operation ensures the longevity of your trailer and the safety of your cargo.
- Hitching: Connect the trailer's 2-inch coupler to your vehicle's hitch ball. Secure the coupler latch and insert the safety pin. Cross the safety chains beneath the coupler and attach them to your tow vehicle. Connect the electrical wiring harness for lights.
- Loading: Distribute cargo evenly over the trailer bed. Place heavier items over the axle and secure all cargo to prevent shifting during transit. Do not exceed the 1,715-lb. payload capacity.
- Towing: Drive cautiously, allowing for increased stopping distances and wider turns. Be mindful of the trailer's dimensions and weight. The tires on this trailer are rated for a maximum speed of 55 mph. Exceeding this speed can lead to tire failure and loss of control.
- Registration: Depending on your local regulations, the trailer may require registration with your state's Department of Motor Vehicles (DMV). Ensure you have all necessary documentation, such as the Certificate of Origin (COO) or Manufacturer's Statement of Origin (MSO), signed and ready for registration.

Figure 3: The Ultra-Tow Utility Trailer hitched to a tow vehicle, demonstrating readiness for transport.
Maintenance
Regular maintenance is crucial for the safe and reliable operation of your trailer.
- Tire Pressure: Check tire pressure before each use. Maintain the recommended PSI as indicated on the tire sidewall or in the assembly guide.
- Wheel Bearings: Inspect and lubricate wheel bearings periodically. Note that standard Bearing Buddy fittings may not be compatible with this trailer's hubs. Refer to the assembly guide for specific lubrication instructions and compatible parts.
- Lights and Wiring: Verify all lights (tail lights, brake lights, turn signals) are functioning correctly before each trip. Inspect the wiring harness for any signs of wear, damage, or loose connections.
- Frame and Fasteners: Regularly inspect the aluminum frame for any cracks, bends, or damage. Check all bolts, nuts, and fasteners for tightness and re-torque as necessary.
- Coupler and Safety Chains: Ensure the coupler mechanism operates smoothly and securely. Inspect safety chains for wear or damage.

Figure 4: A close-up view of the trailer's LED tail light, which should be regularly checked for proper function.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights not working | Loose electrical connection, faulty bulb/LED, vehicle wiring issue | Check all wiring connections, inspect bulbs/LEDs, test vehicle's trailer light output. |
| Trailer sways excessively | Improper load distribution, incorrect tire pressure, excessive speed | Adjust cargo for even weight distribution, check tire pressure, reduce towing speed. |
| Difficulty registering trailer | Missing or incorrect paperwork (COO/MSO), state-specific requirements | Ensure all title documents are correctly filled out and signed. Contact the seller or your local DMV for specific requirements. |
| Missing parts during assembly | Packaging error, shipping damage | Contact customer support with your parts list and purchase information. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Ultra-Tow |
| Model Number | 3806S108 |
| Item Weight | 265.6 pounds |
| Vehicle Service Type | Trailer |
| Material | Aluminum |
| Finish Type | Powder Coated |
| UPC | 840321722850 |
| Maximum Towing Capacity | 1715 pounds |
| Max. GVWR | 1980 pounds |
| Bed Dimensions | 5ft. x 8ft. |
| Tire Speed Rating | 55 mph (maximum) |
Warranty and Support
For warranty information, please refer to the documentation included with your purchase or contact the retailer. This product is sold by Northern Tool + Equipment. For customer support regarding missing parts, assembly issues, or product inquiries, please contact Northern Tool + Equipment directly.
Return Policy: This product typically has a 30-day easy return policy. Please consult your purchase receipt or retailer's terms for specific details.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.