Ohlins KA 345 Shock Absorber User Manual

1. Introduction

The Ohlins KA 345 Shock Absorber is engineered for superior performance in street and roadracing applications. Developed from extensive knowledge and experience gained from top factory race teams globally, this shock absorber offers exceptional construction, materials, and engineering. It features a precision-drawn steel shock body with an aluminum shock reservoir, ensuring durability and lightweight performance. This manual provides essential information for the proper installation, operation, and maintenance of your Ohlins KA 345 Shock Absorber.

Key features include:

• Developed from top factory race team knowledge and experience.
• Superior construction, materials, and engineering for optimal performance.
• Shock body made from precision-drawn steel with an aluminum shock reservoir.
• Lightweight, high-strength aluminum shock bodies for race applications.
• Stainless steel braided PTFE hose used with all remote reservoir shocks.
• Springs are made of chrome silicone for durability and consistent performance.

2. Safety Information

Always prioritize safety when handling, installing, or maintaining the shock absorber. Improper installation or adjustment can lead to serious injury or damage to the vehicle.

• Professional Installation Recommended: Installation of this shock absorber requires specialized tools and knowledge. It is highly recommended that installation be performed by a qualified technician.
• Read Instructions Carefully: Before any work, thoroughly read and understand all instructions in this manual.
• Wear Protective Gear: Always wear appropriate personal protective equipment, including safety glasses and gloves, when working with vehicle components.
• Vehicle Stability: Ensure the vehicle is securely supported on a stable, level surface before beginning any work.
• High Pressure Warning: Shock absorbers contain high-pressure gas. Do not attempt to disassemble the shock absorber unless specifically instructed and equipped to do so. Puncturing or opening the shock absorber can cause serious injury.
• Cleanliness: Keep the work area clean and free of debris.
• Torque Specifications: Adhere strictly to all torque specifications provided by the vehicle manufacturer and Ohlins for fasteners.

3. Components Overview

The Ohlins KA 345 Shock Absorber is a precision-engineered component designed for optimal suspension performance. Below is an image illustrating the general appearance of the shock absorber.

Figure 3.1: Ohlins KA 345 Shock Absorber. This image displays the main body of the shock absorber, featuring a bright yellow spring coiled around a silver-colored cylinder. The top and bottom mounting points are visible, along with adjustment collars for the spring preload.

The primary components include the shock body, piston rod, spring, and various adjustment mechanisms. The shock body houses the damping fluid and gas, while the spring provides the primary suspension action. Specific details regarding individual components and their functions are typically found in detailed service manuals or provided by a certified Ohlins technician.

4. Setup and Installation

Proper installation is critical for the performance and safety of your Ohlins shock absorber. Due to the specialized nature of suspension components, professional installation is strongly recommended.

4.1 Pre-Installation Checks

• Verify that the shock absorber model (KA 345) is correct for your specific vehicle application.
• Inspect the shock absorber for any signs of shipping damage.
• Ensure all necessary mounting hardware is present and in good condition.
• Gather all required tools, including torque wrenches, appropriate sockets, and vehicle lifting equipment.

4.2 Installation Procedure (General Guidelines)

1. Safely lift and support the vehicle according to the manufacturer's guidelines.
2. Remove the existing shock absorber, carefully noting the orientation and any shims or spacers.
3. Clean the mounting points on the vehicle.
4. Install the Ohlins KA 345 Shock Absorber, ensuring proper alignment of mounting eyes and bushings.
5. Insert mounting bolts and hand-tighten.
6. Lower the vehicle partially to allow the suspension to settle, then torque all mounting bolts to the vehicle manufacturer's specified values. Refer to your vehicle's service manual for exact torque specifications.
7. Perform a final visual inspection to ensure all components are correctly installed and secured.

4.3 Initial Adjustments

After installation, initial adjustments such as spring preload should be set according to Ohlins recommendations for your specific vehicle and riding style. Consult an Ohlins service center or a qualified suspension specialist for optimal setup.

5. Operating and Adjustments

The Ohlins KA 345 Shock Absorber is designed to provide superior handling and ride comfort. While the shock absorber operates automatically, understanding its basic functions and available adjustments can enhance your riding experience.

5.1 Basic Function

The shock absorber's primary role is to dampen oscillations of the spring, preventing excessive bouncing and maintaining tire contact with the road surface. It converts kinetic energy from suspension movement into heat, which is then dissipated.

5.2 Adjustments

Ohlins shock absorbers typically feature several adjustment options to fine-tune performance. For the KA 345, these may include:

• Spring Preload: Adjusts the initial compression of the spring, affecting ride height and sag. This is typically done via threaded collars on the shock body.
• Rebound Damping: Controls the speed at which the shock absorber extends after compression.
• Compression Damping: Controls the speed at which the shock absorber compresses.

Refer to the specific Ohlins setup guide for your vehicle model for detailed instructions on how to make these adjustments and recommended settings. Incorrect adjustments can negatively impact handling and safety. It is advisable to consult with a suspension expert for personalized tuning.

6. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Ohlins KA 345 Shock Absorber.

• Regular Cleaning: Keep the shock absorber clean, especially the piston rod and seals, to prevent dirt and debris from entering the seals and causing wear. Use mild soap and water, then rinse thoroughly.
• Inspect for Leaks: Periodically check for any signs of oil leakage around the seals. A leaking shock absorber requires immediate attention from a qualified service center.
• Check Mounting Bolts: Ensure all mounting bolts remain tight according to specified torque values. Loose bolts can lead to premature wear or failure.
• Inspect Bushings: Check the condition of the mounting bushings for wear or cracking. Worn bushings can lead to play and reduced performance.
• Professional Servicing: Ohlins shock absorbers are precision components that require periodic professional servicing (rebuilding) to maintain peak performance. Consult an authorized Ohlins service center for recommended service intervals, which vary based on usage (street vs. race).
• Avoid Harsh Chemicals: Do not use strong solvents or abrasive cleaners on the shock absorber, as they can damage finishes and seals.

7. Troubleshooting

This section addresses common issues you might encounter with your shock absorber. For complex problems, always consult an authorized Ohlins service center.

8. Specifications

Below are the technical specifications for the Ohlins KA 345 Shock Absorber:

9. Warranty and Support

Ohlins products are manufactured to the highest standards and are backed by a manufacturer's warranty. Specific warranty terms and conditions may vary by region and product. Please retain your proof of purchase.

For warranty claims, technical support, or service inquiries, please contact an authorized Ohlins dealer or service center. You can find contact information and a list of authorized service providers on the official Ohlins website. Always provide your product model (KA 345) and serial number when seeking support.

Important: Unauthorized modifications or servicing by non-Ohlins certified technicians may void your warranty.