ABUS Steel-O-Chain 5805C/75 Combination Chain Lock User Manual

1. Introduction

Thank you for choosing the ABUS Steel-O-Chain 5805C/75 Combination Chain Lock. This manual provides essential information for the proper setup, operation, and maintenance of your new lock. Please read these instructions carefully before first use to ensure optimal security and longevity of your product.

2. Product Overview

The ABUS Steel-O-Chain 5805C/75 is designed to offer a balance of security and portability for your bicycle. It features a robust steel chain with a resettable combination mechanism, making it a convenient option for various security needs.

Figure 1: Overview of the ABUS Steel-O-Chain 5805C/75 Combination Chain Lock.

3. Key Features

• 5mm Square Temper Hardened Steel Chain: Provides robust resistance against cutting attempts.
• Pinned Fabric Sleeve: Protects your bicycle's paintwork from scratches and damage.
• Individually Resettable Combination: Allows you to set your preferred code for keyless convenience.
• Easy Transport: The chain can be folded compactly for transport, often fitting under a seat or around a seat post.
• Length Options: Available in 29.5 inches (75 cm) or 43.3 inches (110 cm) to suit different locking scenarios.

4. Setup: Setting Your Combination

Your ABUS Steel-O-Chain 5805C/75 lock comes with a factory-set default combination, typically 0-0-0-0 or 0-0-0-5. It is highly recommended to change this to a personal, memorable combination immediately.

4.1. Changing the Combination

1. Open the Lock: Align the dials to the current combination (factory default or your last set code) and open the lock head.
2. Locate the Reset Mechanism: With the lock open, look for a small reset button or lever on the lock body, usually near the dials. This may be a small red or silver component.


Figure 2: Close-up view of the combination dials and the reset mechanism (often a small red button or lever).

3. Engage Reset Mode: Press and hold the reset button, or move the reset lever to the 'SET' position. Some models may require a small tool (like a pen tip) to press the button.
4. Set New Combination: While holding the reset mechanism, rotate the dials to your desired new 4-digit combination. Ensure the numbers are clearly aligned with the indicator marks.

Figure 3: Adjusting the combination dials to set a new code.
5. Disengage Reset Mode: Release the reset button or return the lever to its original position. Your new combination is now set.
6. Test the New Combination: Scramble the dials, then re-enter your new combination and attempt to open the lock. Confirm it opens correctly before securing your bicycle.

5. Operation

5.1. Locking Your Bicycle

1. Choose a Secure Object: Select a fixed, immovable object (e.g., a bike rack, lamppost) to secure your bicycle to.
2. Position the Chain: Thread the chain through the frame of your bicycle and around the secure object. If possible, also include a wheel.


Figure 4: The chain lock securing a bicycle frame to a fixed object.

3. Close the Lock Head: Insert the end link of the chain into the lock head.
4. Scramble Dials: Once the lock head is closed, scramble the combination dials to secure the lock.

5.2. Unlocking Your Bicycle

1. Align Combination: Rotate the dials to your personal 4-digit combination.
2. Open Lock Head: The lock head should release, allowing you to remove the chain.

6. Maintenance

Regular maintenance helps ensure the smooth operation and longevity of your lock.

• Cleaning: Periodically wipe down the lock body and chain with a damp cloth to remove dirt and grime.
• Lubrication: Apply a small amount of silicone-based lubricant to the combination dials and the locking mechanism once or twice a year, or more frequently in harsh environments. This helps prevent corrosion and ensures smooth operation.
• Inspect for Wear: Regularly check the chain links and fabric sleeve for any signs of wear, damage, or corrosion. Replace the lock if significant damage is observed.

7. Troubleshooting

7.1. Forgotten Combination

If you forget your combination, there is no master key or universal reset code. It is crucial to remember your chosen combination. ABUS does not offer a combination retrieval service for this model. Consider writing down your combination and storing it in a secure, memorable location, separate from your lock.

7.2. Stiff Dials or Mechanism

If the dials become stiff or the mechanism is difficult to operate, apply a silicone-based lubricant as described in the Maintenance section. Ensure no dirt or debris is obstructing the dials.

8. Specifications

9. Warranty and Support

For information regarding warranty coverage or product support, please refer to the official ABUS website or contact ABUS customer service directly. Keep your purchase receipt as proof of purchase.