Kryptonite Keeper 790 Combo Bike Chain Lock Instruction Manual

1. Introduction

The Kryptonite Keeper 790 Combo Bike Chain Lock is designed to provide reliable security for your bicycle. This integrated chain lock features an end-link locking point for extensive holding power and robust 3T manganese steel chain links. It is rated 5 out of 10 on the Kryptonite security scale, making it suitable for quick stops in metropolitan areas, longer stops in suburban areas, or overnight use in rural areas. The lock incorporates a 4-digit resettable combination mechanism for keyless convenience.

Image: The Kryptonite Keeper 790 Combo Bike Chain Lock, showing its integrated lock head and fabric-covered chain.

Product Overview Video

Video: An overview of the Keeper Combo Chain, highlighting its features and benefits.

2. Key Features

• End-Link Locking Point: Provides extensive holding power by securing the chain directly into the lock head.
• 4-Sided 3T Manganese Steel Chain Links: Offers high resistance against cutting and prying attempts.
• 4-Digit Resettable Combination: Allows for personalized code setting with over 10,000 possible combinations, eliminating the need for keys.
• Durable Weather-Resistant Nylon Sleeve: Protects the bicycle frame from scratches and provides weather protection for the chain.
• Patent Pending Lock Design: Incorporates advanced security mechanisms.
• Portable Design: Easy to carry and wrap around various objects.

Image: Detailed view of the Kryptonite Keeper 790 highlighting its 4-digit resettable combination and 7mm four-sided manganese steel chain links.

3. Setup: Setting Your Combination

Your Kryptonite Keeper 790 Combo Lock comes with a factory default combination. To personalize your lock, follow these steps:

1. Align the dials to the factory default combination (usually 0000 or 0005, refer to packaging if unsure).
2. Pull the lock head open and locate the reset mechanism (often a small lever or button on the side or bottom of the lock head).
3. While the lock head is open, use a small pointed object (like a pen tip) to push and hold the reset mechanism.
4. Rotate the dials to your desired new 4-digit combination, ensuring the numbers are aligned with the reference marks.
5. Release the reset mechanism. Your new combination is now set.
6. Scramble the dials to lock the mechanism. Test your new combination to ensure it functions correctly before securing your bicycle.

Combination Reset Video

Video: Instructions on how to reset the combination for Kryptonite Kryptolok & Keeper Combo Chains.

4. Operating Instructions

To use your Kryptonite Keeper 790 Combo Lock:

1. Unlock: Align the dials to your personal 4-digit combination. Pull the lock head away from the chain's end-link.
2. Secure Your Bicycle: Wrap the chain around your bicycle frame and a secure, immovable object (e.g., a bike rack, lamppost). Ensure the chain passes through both the frame and at least one wheel for maximum security.
3. Lock: Insert the end-link of the chain into the lock head until it clicks securely into place. Scramble the dials to a random set of numbers to prevent unauthorized access.
4. Remove: Align the dials to your personal 4-digit combination. Pull the lock head to release the chain.

Image: A Kryptonite Keeper 790 lock securing a bicycle to a public bike rack.

Proper Lock-Up Video

Video: Demonstrates the proper technique for locking up a bicycle using a chain lock.

5. Maintenance

To ensure the longevity and smooth operation of your Kryptonite Keeper 790 Combo Lock:

• Cleaning: Periodically wipe down the lock body and chain sleeve with a damp cloth to remove dirt and grime.
• Lubrication: Apply a small amount of graphite-based lubricant to the combination dials and the internal locking mechanism every few months, or more frequently in harsh weather conditions. Avoid oil-based lubricants as they can attract dirt.
• Inspection: Regularly inspect the chain links and lock head for any signs of wear, damage, or corrosion. If significant damage is observed, consider replacing the lock.

6. Troubleshooting

• Dials are Stiff: Apply a graphite-based lubricant to the dials and rotate them back and forth to work the lubricant in.
• Lock Head Not Opening: Ensure your combination is precisely aligned with the reference marks. Sometimes a slight adjustment to one or more dials can resolve this. If you have forgotten your combination, refer to the Combo Safe Program section.
• Chain Not Engaging/Disengaging: Check for any obstructions in the lock head or the end-link. Ensure the end-link is fully inserted into the lock head before scrambling the dials.

7. Specifications

8. Warranty and Support

Limited Lifetime Warranty

The Kryptonite Keeper 790 Combo Bike Chain Lock is backed by a Limited Lifetime Warranty. For specific terms and conditions, please refer to the official Kryptonite website or contact customer support.

Combo Safe Program

Kryptonite offers a free Combo Safe Program. By registering your lock's combination online, Kryptonite can retrieve it for you in case you forget it. This program provides an additional layer of convenience and peace of mind. Visit the official Kryptonite website to register your combination.

Image: The Kryptonite Combo Safe Program logo, illustrating the benefit of registering your combination.