Introduction
This manual provides essential information for the identification and use of your Yale Lock MC139 replacement key. This key is designed for Yale Lock series MC001-MC850, commonly found in office furniture and classic cars from 1930 onwards. Proper identification of your lock code is crucial for ensuring the correct key fit.
Key Identification
To ensure you have the correct replacement key, you must identify the lock code. The lock code is typically stamped on your existing key or directly on the face of the lock itself. For this specific key, the code is MC139.
Figure 1: Example of a Yale replacement key. The key code (e.g., MC001) is typically embossed on the head of the key. Verify this code matches your lock's requirement.
If your original key is lost, locate the lock code on the lock cylinder or housing. This code is essential for ordering the correct replacement.
Operating Instructions
- Insert the Key: Gently insert the MC139 key into the lock's keyway. Do not force the key.
- Turn to Unlock/Lock: Once fully inserted, turn the key clockwise or counter-clockwise, depending on the lock mechanism, to engage or disengage the locking bolt.
- Remove the Key: After the lock has operated, return the key to its original insertion position (usually vertical) before gently pulling it out.
Ensure the key is fully seated before attempting to turn it to prevent damage to both the key and the lock mechanism.
Maintenance
- Keep Clean: Periodically wipe the key with a dry cloth to remove dirt or debris.
- Avoid Lubricants: Do not apply oil or grease directly to the key or into the lock. If the lock mechanism is stiff, consult a locksmith for appropriate lock lubricant.
- Proper Storage: Store the key in a dry place, away from excessive moisture or corrosive materials, to prevent tarnishing or damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Key does not insert fully. | Obstruction in keyway, incorrect key. | Check for debris in the lock. Verify the key code (MC139) matches your lock. |
| Key turns but lock does not operate. | Internal lock mechanism issue. | The lock itself may require repair or replacement. Consult a professional locksmith. |
| Key is stiff or difficult to turn. | Dirt/grime in lock, worn key/lock. | Do not force. Gently jiggle the key. If persistent, the lock may need cleaning or servicing by a professional. |
Specifications
- Product Type: Replacement Key
- Key Series: Yale Lock MC001-MC850
- Model Code: MC139
- Material: Brass (implied by image and typical key material)
- Compatibility: Office furniture locks, 1930s onward classic car locks (requiring MC139 code)
- Key Blank: Y6
- Item Weight: 0.247 ounces (7 Grams)
- Manufacturer: Yale Lock
- Brand: EasyKeys
Support Information
For further assistance or inquiries regarding your Yale Lock MC139 replacement key, please contact the seller, EasyKeys Inc. They can provide support for product-related questions and order issues.
You can typically find their contact information through your purchase platform or by visiting their official store page.
Seller: EasyKeys Inc.
Amazon Store Link: EasyKeys Store