1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Medeco 11TR50319 Maxum Residential Single Cylinder Deadbolt. Designed for high security, this deadbolt offers robust protection for residential applications. Please read these instructions carefully before proceeding with installation or use to ensure proper function and security.
2. Product Overview
The Medeco Maxum deadbolt is engineered for superior security and durability. Key features include:
- High Security: Features triple-locking security with a Medeco 3 cylinder.
- Restricted Keyway: M3 keyway prevents unauthorized key duplication.
- Durability: Constructed from robust materials for long-lasting performance.
- Residential Aesthetic: Designed to complement modern residential door hardware.
- UL 437 Listed: Meets stringent security standards.
3. Package Contents
Verify that all components are present before beginning installation:
- Medeco Maxum Single Cylinder Deadbolt Assembly
- Two (2) Medeco Security Keys (5 pin)
- Mounting Hardware (screws, strike plate)
- Key Duplication Authorization Card
- Installation Template (if included)
4. Setup and Installation
This section outlines the general steps for installing your Medeco Maxum deadbolt. Professional installation is recommended for optimal security and performance. Ensure your door meets the following specifications:
- Door Thickness: 1-3/4 inches to 2 inches
- Cross-bore: Standard 2-1/8 inches
- Edge Bore: 1 inch

This image displays the Medeco Maxum single cylinder deadbolt. The front view shows the Medeco logo and keyway, while the side view reveals the robust bolt mechanism designed for high security.
Installation Steps (General Guidance):
- Prepare the Door: If installing on a new door, use the provided template to mark and drill the necessary holes for the cross-bore and edge bore. For existing installations, ensure the current holes match the required dimensions.
- Install the Bolt: Insert the deadbolt latch into the edge bore of the door. Ensure the bolt is oriented correctly. Secure it with the provided screws.
- Install the Exterior Cylinder: Place the exterior cylinder assembly through the cross-bore from the outside of the door.
- Install the Interior Thumb Turn: Position the interior thumb turn assembly on the inside of the door, aligning it with the exterior cylinder and the bolt mechanism.
- Secure the Assemblies: Fasten the interior and exterior assemblies together using the through-bolts provided. Tighten securely but do not overtighten.
- Install the Strike Plate: On the door frame, align and install the strike plate. Ensure the deadbolt extends smoothly into the strike plate opening when locked.
- Test Operation: Insert a key into the exterior cylinder and turn to extend and retract the bolt. Test the interior thumb turn for smooth operation.
5. Operating Instructions
The Medeco Maxum single cylinder deadbolt operates as follows:
- Locking from Exterior: Insert the Medeco security key into the exterior cylinder and turn it to extend the deadbolt into the door frame. Remove the key.
- Unlocking from Exterior: Insert the Medeco security key into the exterior cylinder and turn it to retract the deadbolt. Remove the key.
- Locking from Interior: Rotate the thumb turn on the interior side of the door to extend the deadbolt.
- Unlocking from Interior: Rotate the thumb turn on the interior side of the door to retract the deadbolt.
6. Maintenance
To ensure the longevity and smooth operation of your Medeco deadbolt, follow these maintenance guidelines:
- Lubrication: Periodically apply a small amount of graphite-based lubricant or a silicone-based spray lubricant specifically designed for locks into the keyway and bolt mechanism. Avoid oil-based lubricants as they can attract dust and debris.
- Cleaning: Wipe the exterior surfaces with a soft, damp cloth. Avoid abrasive cleaners or solvents that could damage the finish.
- Check Fasteners: Occasionally check that all mounting screws are tight. Loose screws can affect the deadbolt's security and operation.
7. Troubleshooting
Common Issues and Solutions:
- Key is difficult to insert or turn:
- Ensure the key is fully inserted and oriented correctly.
- Apply a small amount of graphite or silicone-based lock lubricant into the keyway.
- Check for any debris in the keyway. - Deadbolt does not extend or retract smoothly:
- Verify that the strike plate on the door frame is properly aligned with the bolt.
- Check for any obstructions in the bolt path or strike plate.
- Lubricate the bolt mechanism. - Unauthorized key duplication:
- Medeco keys feature a restricted keyway. Duplication requires specific authorization and can only be performed by authorized Medeco dealers. Refer to your Key Duplication Authorization Card. - Loose deadbolt assembly:
- Tighten the mounting screws that connect the interior and exterior assemblies. Do not overtighten.
8. Specifications
| Specification | Detail |
|---|---|
| Brand | Medeco |
| Model Number | 11TR50319 |
| Lock Type | Single Cylinder Deadbolt |
| Special Feature | Key Lock, High Security, Restricted M3 Keyway |
| Material | Nickel |
| Finish | Satin Nickel |
| Recommended Use | Residential Security |
| Door Thickness | 1-3/4" to 2" |
| Cross-bore | 2-1/8" |
| Edge Bore | 1" |
| UL Listed | UL 437 |
9. Warranty and Support
Medeco products are manufactured to high standards and are backed by a manufacturer's warranty. For specific warranty details, please refer to the documentation included with your product or visit the official Medeco website. For technical support, replacement parts, or warranty claims, please contact Medeco customer service directly through their official channels.





