Introduction
This user manual provides comprehensive instructions for the setup, operation, and maintenance of your Puroma 4-Digit Combination Lock, Model TH002. Please read this manual carefully to ensure proper use and to maximize the lifespan of your product. This lock is designed for various security applications, offering a reliable and convenient keyless solution.

Image: Two Puroma 4-Digit Combination Locks, black color.
Product Features
- 4-Digit Combinations: Offers 10,000 unique combinations for enhanced security, making it significantly more secure than 3-digit locks.

Image: Detail of the lock dials highlighting the 10,000 possible combinations.
- Sturdy and Durable Construction: Manufactured from premium zinc alloy and steel, designed to resist rust, corrosion, and attempts at forced entry.

Image: Illustration detailing the carbon steel reinforced shackle and zinc alloy body for durability.
- Side Window Design: Features a convenient side window for easy viewing and setting of the combination, allowing for one-handed code entry.

Image: Visual representation of the lock's side window for clear combination visibility.
- Weatherproof: Built to withstand outdoor conditions, making it suitable for both indoor and outdoor applications.
- Conveniently Portable: Its compact and lightweight design ensures easy transport and versatile use across various locations.

Image: The lock held in a hand, demonstrating its compact and portable size, along with detailed dimensions.
Setup: Setting Your Combination
Your Puroma 4-Digit Combination Lock comes with a factory preset combination of 0-0-0-0. Follow these steps to set your personalized combination:
- Set the lock to the default code (0-0-0-0) and pull up the shackle to open the lock.
- Rotate the shackle 90 degrees counter-clockwise (or clockwise, depending on the specific lock mechanism, refer to the diagram) to align it with the code setting gap.
- Press the shackle down firmly until the tiny pin is entirely inside the gap.
- While keeping the shackle pressed down, rotate it another 90 degrees in the same direction. The shackle should now be held in place.
- Scroll the number dials to set your desired 4-digit combination. Ensure the numbers are clearly aligned in the side window.
- Once your new code is set, turn the shackle back to its original open position (180 degrees from the setting position) and pull it up. The shackle will pop up, indicating the new code is set.
- Scramble the dials to lock the shackle. Test your new combination to ensure it opens correctly before securing any valuables.

Image: Visual guide illustrating the six steps to set a new combination on the Puroma lock.
Operating Your Lock
To open the lock, align the dials to your set 4-digit combination. The shackle will release, allowing you to pull it open. To close and secure the lock, push the shackle back into the lock body and scramble the dials. This will prevent unauthorized access.
Maintenance
To ensure the longevity and smooth operation of your Puroma combination lock, follow these maintenance guidelines:
- Cleaning: Wipe the lock periodically with a soft, damp cloth to remove dirt and grime. Avoid using abrasive cleaners or solvents, as these can damage the finish and internal mechanisms.
- Lubrication: If the dials become stiff or difficult to turn, apply a small amount of silicone-based lubricant to the moving parts. Do not use oil-based lubricants, as they can attract dust and debris.
- Storage: When not in use, store the lock in a dry environment to prevent moisture buildup, especially if it has been exposed to wet conditions.
- Inspection: Regularly inspect the shackle and lock body for any signs of wear, damage, or corrosion. Address any issues promptly to maintain security.
Troubleshooting
If you encounter issues with your Puroma 4-Digit Combination Lock, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock will not open with correct combination. | Dials not perfectly aligned; combination was accidentally changed; internal mechanism issue. | Ensure all numbers are precisely centered in the side window. Try slightly adjusting each dial. If the combination was changed, attempt to recall the new code. If all else fails, the lock may need to be replaced. |
| Dials are stiff or hard to turn. | Dirt, dust, or lack of lubrication. | Clean the dials and surrounding areas. Apply a small amount of silicone-based lubricant to the moving parts. |
| Shackle does not fully engage or disengage. | Obstruction in the shackle hole; bent shackle; internal damage. | Check for any debris in the shackle hole and remove it. If the shackle is bent or there's internal damage, the lock may need replacement. |
Specifications
| Attribute | Detail |
|---|---|
| Brand | Puroma |
| Model Name | TH002 |
| Lock Type | Mechanical Code Lock |
| Special Feature | Weatherproof |
| Material | Alloy Steel, Zinc |
| Item Dimensions (L x W x H) | 3.15 x 1.73 x 0.8 inches |
| Item Weight | 8.48 ounces |
| Number of Pieces | 2 (for this package) |
| Style | Resettable Combination Lock |
| Recommended Uses | School Gym Locker Lock, Gate Lock, Toolbox Lock, Storage Unit Lock |
| UPC | 721361716941 |
Applications
The Puroma 4-Digit Combination Lock is highly versatile and suitable for a wide range of applications, both indoors and outdoors, including but not limited to:
- School Lockers
- Gym Lockers
- Sports Lockers
- Toolboxes
- Gates and Fences
- Storage Units
- Sheds

Image: The lock securing a school locker, demonstrating its suitability for educational environments.

Image: Examples of the lock in use on a gate and a storage shed, highlighting its multi-scenario application.
Warranty and Support
Your Puroma 4-Digit Combination Lock is covered by a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and ensures your product performs as expected under normal use.
For technical support, warranty claims, or any questions regarding your product, please contact Puroma customer service through the retailer's platform or the official Puroma website. Please have your purchase details and model number (TH002) ready when contacting support.
Visit the Puroma Store for more information and products.




