Introduction
This manual provides detailed instructions for the proper installation, operation, and maintenance of your Trimax T5Black 5/8" Receiver Lock. Designed for Class V hitches, this lock offers enhanced security for your towing equipment. Please read this manual thoroughly before use to ensure correct application and to maximize the product's lifespan and effectiveness.
Product Overview
The Trimax T5Black receiver lock is engineered for durability and security, featuring machine-forged chrome steel construction and a weather-resistant black epoxy coating. It is designed to fit 5/8" receiver pins with a 3.5" span, suitable for Class V hitches.
Key Features:
- Keyed Receiver Lock: Provides a high-security locking mechanism for protecting trailers and towing equipment.
- Fits Class V Receiver Hitches: Designed for compatibility with heavy-duty towing applications.
- Machine Forged Chrome Steel: Engineered for extreme durability and resistance against cutting or prying.
- Weather-Resistant Coating: Protects against rust, dirt, and harsh weather conditions.
- Pin Size 5/8" with 3-1/2" Span: Ensures a precise and secure fit for a variety of hitch receivers.
What's in the Box:
- Trimax Premium 5/8 in 3.5 in Span Receiver Lock for Class V
- Keys (typically two)

Image: The Trimax T5Black 5/8" Receiver Lock, a black cylindrical pin with knurled ends and a key mechanism on one side.
Setup and Installation
- Prepare Hitch Receiver: Ensure your vehicle's hitch receiver and the trailer's hitch are clean and free of debris.
- Align Hitch: Position the trailer hitch into the vehicle's receiver tube, aligning the pin holes.
- Insert Receiver Lock Pin: Insert the main pin of the Trimax T5Black receiver lock through the aligned holes of the hitch receiver and the trailer hitch.

Image: Close-up view of the 5/8" pin being inserted through a hitch receiver, illustrating the correct pin size.
- Secure the Lock: Attach the locking mechanism to the other end of the pin. Insert the key and turn it to the locked position. The key should remain in the lock until it is fully secured.

Image: The Trimax T5Black receiver lock installed on a vehicle's hitch, showing the 3.5" span securely holding the hitch in place.
- Verify Lock: Gently pull on the hitch to ensure the lock is fully engaged and the hitch cannot be removed.
- Apply Dust Cap: Place the rubber dust cap over the keyhole to protect it from dirt and moisture.
Operating Instructions
The Trimax T5Black receiver lock is designed for straightforward operation.
To Lock:
- Insert the pin through the hitch receiver and coupler.
- Push the lock head onto the pin until it clicks into place.
- Insert the key and turn it to ensure the lock is engaged. The key should be removable only when the lock is fully secured.
- Cover the keyhole with the protective dust cap.
To Unlock:
- Remove the dust cap from the keyhole.
- Insert the key fully into the keyhole.
- Turn the key to the unlock position and pull the lock head off the pin.
- Remove the pin from the hitch receiver.
Maintenance
Regular maintenance will help prolong the life and functionality of your Trimax T5Black receiver lock.
- Cleaning: Periodically clean the lock with a damp cloth to remove dirt, salt, and road grime.
- Lubrication: Apply a small amount of graphite lubricant or a silicone-based spray into the keyhole and on the locking mechanism every few months, especially in harsh weather conditions or before winter. This helps prevent corrosion and ensures smooth operation.
- Dust Cap: Always ensure the rubber dust cap is properly seated over the keyhole when the lock is not in use to protect the internal mechanism from moisture and debris.
- Inspection: Regularly inspect the lock for any signs of wear, damage, or corrosion. If significant damage is observed, consider replacing the lock.
Troubleshooting
If you encounter issues with your Trimax T5Black receiver lock, refer to the following common problems and solutions:
- Lock is difficult to engage or disengage:
- Ensure the pin is fully inserted and aligned correctly through the hitch holes.
- Apply lubricant to the keyhole and locking mechanism as described in the Maintenance section.
- Check for any debris or obstruction in the keyhole or on the pin.
- Key is difficult to turn or remove:
- Ensure the key is fully inserted.
- Apply lubricant to the keyhole.
- The key should only be removable when the lock is in the fully locked position. If it's stuck in an intermediate position, try wiggling it gently while turning.
- Dust cap does not fit snugly:
- Inspect the dust cap for damage or stretching. A damaged cap may need replacement to ensure proper protection.
Specifications
| Brand | Trimax |
| Model | T5Black |
| Item Weight | 15.8 ounces |
| Product Dimensions | 7 x 3.25 x 3.25 inches |
| Pin Size | 5/8 inch |
| Span | 3.5 inches |
| Material | Machine-Forged Chrome Steel |
| Coating | Black Epoxy Coating (Weather-Resistant) |
| Compatibility | Class V Hitches |
Warranty and Support
The Trimax T5Black Receiver Lock comes with a Limited Lifetime Warranty, providing assurance for its quality and durability. This warranty covers manufacturing defects and ensures the product performs as intended under normal use.
For warranty claims, technical assistance, or any product-related inquiries, please contact Trimax customer service. Trimax offers USA-based customer service to assist you.
Refer to the official Trimax website or your purchase documentation for the most current contact information and detailed warranty terms and conditions.
