Product Overview
The Armordillo CoveRex TFX Series Hard Tri-Fold Tonneau Cover is designed to provide secure cargo protection and enhance the aerodynamics of your truck. This cover features a low-profile design and a durable aluminum construction, ensuring your truck bed contents remain protected from weather and theft.
Compatibility: This tonneau cover is compatible with 2007-2016 Toyota Tundra Fleetside models with a 6.5 Ft (78") bed and a track system. It is not compatible with 5.5 Ft (66") short bed, 8 Ft (96") long bed, or Stepside models.

Image: The Armordillo CoveRex TFX Hard Tri-Fold Tonneau Cover installed on the bed of a Toyota Tundra.
Components Included
Before beginning installation, verify that all components are present:
- TFX Series Hard Tonneau Cover
- Clamps (for securing the cover to the truck bed rails)
- Required Hardware (bolts, washers, nuts)
- Installation Guide (this document)

Image: Visual representation of installation features, indicating no drilling is required and all necessary hardware and guides are included.
Installation Instructions
Installation of the CoveRex TFX Tonneau Cover is a straightforward bolt-on process that typically requires no drilling. A 17mm wrench and an Allen key are the primary tools needed.
Step 1: Prepare the Truck Bed
Ensure the truck bed rails are clean and free of debris. Position the tonneau cover on the front of the truck bed, near the cab, ensuring it is centered and aligned.
Step 2: Secure the Front Section
Unfold the first section of the tonneau cover. Attach the front clamps to the truck bed rails, securing the cover's front panel. Tighten the clamps evenly to ensure a firm, stable fit. Do not overtighten.
Step 3: Unfold and Secure Remaining Sections
Carefully unfold the middle and rear sections of the tonneau cover towards the tailgate. Ensure each panel lays flat and is properly aligned with the truck bed rails.

Image: The tonneau cover demonstrating its half-open and fully-open configurations.
Step 4: Install Rear Clamps and Latching System
Once fully extended, attach the rear clamps to the truck bed rails. Engage the secure bolt-action latching system at the tailgate end. Ensure the latches are fully engaged and the cover is securely fastened. The cover features an easy-access unlock system for convenience.

Image: Detailed view of the secure bolt action latch and the easy access unlock system.

Image: Close-up of the safety buckle and the internal latching mechanism.
Step 5: Drain Hose Installation (Optional)
If desired, install the provided drain hoses to direct water away from the truck bed. This may require drilling or cutting of box assembly plugs to feed the drain hose out.
Operating Instructions
Opening the Tonneau Cover
- Release the rear latches by pulling the cables located on the underside of the cover near the tailgate.
- Fold the rear panel towards the middle panel.
- If accessing more of the bed, release the latches for the middle panel and fold it towards the front panel.
- Secure the folded cover using the integrated buckle and strap system to prevent it from unfolding during transit.

Image: The tonneau cover fully folded and secured against the truck cab, allowing full access to the truck bed.
Closing the Tonneau Cover
- Release the buckle and strap system holding the folded cover.
- Carefully unfold the panels one by one towards the tailgate.
- Ensure each panel lies flat and is properly seated on the truck bed rails.
- Engage the secure bolt-action latches at the tailgate end to lock the cover in place. Verify that all latches are fully secured.
Maintenance
Regular maintenance will prolong the life and appearance of your tonneau cover.
- Cleaning: Wash the cover regularly with mild soap and water. Avoid abrasive cleaners or harsh chemicals, which can damage the finish. Rinse thoroughly and allow to air dry.
- Weather Seals: The silicon weather seals are designed to resist UV rays and protect against water damage. Periodically inspect the seals for any signs of wear or damage. Clean them with a damp cloth and apply a UV protectant if desired to maintain flexibility and prevent cracking.
- Hardware: Periodically check all clamps and latching mechanisms to ensure they remain tight and secure. Tighten any loose hardware as needed.

Image: Detailed view of the tonneau cover's textured surface and the integrated weather seal along the truck bed rail.
Troubleshooting
If you encounter issues with your tonneau cover, consider the following common solutions:
- Water Leakage:
- Ensure the weather seals are properly seated and free of debris.
- Check that all clamps are securely tightened, providing even pressure along the rails.
- Verify that the drain hoses (if installed) are clear and properly routed.
- Difficulty Folding/Unfolding:
- Inspect the hinges and pivot points for any obstructions or damage.
- Ensure the truck bed rails are clear and the cover panels are not binding.
- Lubricate moving parts with a silicone-based lubricant if necessary.
- Cover Not Latching Securely:
- Check the latching mechanisms for obstructions.
- Ensure the cover is properly aligned on the truck bed.
- Verify that the bolt-action latches are fully extending and engaging the strike plates.
Specifications
| Feature | Detail |
|---|---|
| Brand | ARMORDILLO |
| Model Number | 8738375 |
| Style | Folding (Hard Tri-Fold) |
| Exterior Finish | Painted |
| Material | Aluminum (with high-density core panel) |
| Lock Type | Tailgate |
| Automotive Fit Type | Vehicle Specific Fit (2007-2016 Toyota Tundra Fleetside 6.5 Ft Bed with Track System) |
| Weight Capacity | Up to 350 lbs (when distributed evenly) |
| Included Components | TFX Series Hard Tonneau Cover, Clamps, Required Hardware, Installation Guide |
Warranty Information
This Armordillo CoveRex TFX Tonneau Cover comes with a 1 Year Limited Warranty. For complete details regarding warranty coverage, terms, and conditions, please refer to the manufacturer's official website or contact Armordillo customer support.
Customer Support
For further assistance, technical support, or to inquire about replacement parts, please contact Armordillo customer service. Refer to your original purchase documentation or the Armordillo website for current contact information.
Manufacturer: Armordillo USA
Website: www.armordillousa.com (Note: This is a placeholder URL, please verify the actual manufacturer website for support.)