Lewmar Wuj6 Universal Joint Instruction Manual

1. Introduction

This manual provides essential information for the proper installation, operation, and maintenance of the Lewmar Wuj6 Universal Joint, model 89200070. Designed for robust performance, this universal joint is a critical component in various power transmission systems, particularly suitable for use with large gearboxes (18, 20, and 45).

Lewmar has a long-standing reputation for designing and manufacturing high-quality, reliable marine and industrial products. Adhering to the guidelines in this manual will ensure optimal performance and longevity of your universal joint.

2. Product Features

• Essential Component: Must be fitted at both ends of a torque tube. If a self-aligning bearing is used, one universal joint connects both torque tubes.
• Angle Tolerance: Self-aligning bearings work up to an angle of 15°. The AMK10 Universal Joints have a maximum permissible working angle of 25°.
• Balanced Angle: For optimal performance, the angle at each joint should be balanced where practical.
• Gearbox Compatibility: Specifically suitable for use with large gearboxes, including models 18, 20, and 45.
• Quality Construction: Built in compliance with strict industry standards, ensuring durability and reliability.

3. Product Overview

Figure 1: Lewmar Wuj6 Universal Joint (Model 89200070). This image displays the robust metal construction of the universal joint, featuring multiple bolted connections on each end and a central articulating mechanism. The design highlights its capability to transmit rotational motion between two shafts at an angle.

4. Setup and Installation

Proper installation is crucial for the safe and efficient operation of the universal joint. It is recommended that installation be performed by a qualified professional.

1. Component Requirement: The Wuj6 Universal Joint must be fitted at both ends of a torque tube to ensure proper power transmission and alignment.
2. Self-Aligning Bearing Integration: If a self-aligning bearing is incorporated into the system, one universal joint is sufficient to connect the two torque tubes.
3. Angle Balancing: When installing, strive to balance the angle at each joint. This practice minimizes stress on the components and optimizes operational efficiency.
4. Secure Fastening: Ensure all bolts and fasteners are tightened to the manufacturer's specified torque settings. Refer to the specific torque tube or gearbox manual for these values.
5. Pre-Operation Check: Before initial operation, verify that all connections are secure and that the joint moves freely within its intended range of motion without binding.

5. Operating Guidelines

The Lewmar Wuj6 Universal Joint is designed to operate within specific angular limits to ensure longevity and performance.

• Maximum Working Angle: The AMK10 Universal Joints (and by extension, the Wuj6, given its similar design principles and application) have a maximum permissible working angle of 25°. Exceeding this angle can lead to premature wear and failure.
• Self-Aligning Bearing Angle: If your system utilizes self-aligning bearings, note that these typically work effectively up to an angle of 15°.
• Smooth Operation: Ensure the system operates smoothly without excessive vibration or noise, which could indicate misalignment or an angle exceeding limits.

6. Maintenance

Regular maintenance is essential to ensure the continued reliability and performance of your Lewmar Wuj6 Universal Joint.

• Routine Inspection: Periodically inspect the universal joint for any signs of wear, corrosion, cracks, or loose fasteners. Pay close attention to the articulating components and bolted connections.
• Lubrication: While specific lubrication requirements are not detailed, it is generally good practice to ensure all moving parts are adequately lubricated according to the overall system's maintenance schedule. Consult the gearbox or torque tube system manual for specific lubrication guidelines.
• Cleaning: Keep the joint clean and free from debris, dirt, or corrosive substances that could impede its movement or accelerate wear.
• Fastener Check: Regularly check and re-torque all fasteners to ensure they remain secure, especially after initial break-in periods.
• Replacement: If significant wear or damage is observed, replace the universal joint immediately to prevent further system damage or failure. Use only genuine Lewmar replacement parts.

7. Troubleshooting

Should you encounter issues with your Lewmar Wuj6 Universal Joint, consider the following general troubleshooting steps. For complex issues, professional assistance is recommended.

• Excessive Vibration or Noise:
  • Check for proper alignment of the torque tubes and connected components.
  • Verify that the operating angle does not exceed the maximum permissible angle (25°).
  • Inspect for loose fasteners or worn components within the joint.
• Binding or Restricted Movement:
  • Ensure no foreign objects are obstructing the joint's movement.
  • Check for signs of corrosion or damage that might impede articulation.
  • Confirm that the joint is not being forced beyond its design limits.
• Premature Wear:
  • Review installation for correct alignment and balanced angles.
  • Ensure regular maintenance and lubrication schedules are being followed.
  • Verify that the joint is used within its specified load and speed parameters.

If problems persist, contact Lewmar customer support or a certified service technician.

8. Specifications

9. Safety Information

Always observe general safety precautions when working with mechanical components and power transmission systems.

• Ensure power is disconnected before performing any installation, maintenance, or inspection.
• Wear appropriate personal protective equipment (PPE), including safety glasses and gloves.
• Do not operate the system if the universal joint shows signs of damage or excessive wear.
• Keep hands and clothing clear of moving parts during operation.
• Consult a professional if you are unsure about any installation or maintenance procedures.

10. Warranty and Support

For information regarding warranty coverage, technical support, or replacement parts for your Lewmar Wuj6 Universal Joint, please contact Lewmar directly through their official website or authorized distributors. Always provide your model number (89200070) when seeking support.

Lewmar is committed to providing high-quality products and customer satisfaction. For further assistance, visit the official Lewmar website: www.lewmar.com