Radnor Model 136-682 PTFE Liner Instruction Manual

1. Introduction

Thank you for choosing the Radnor Model 136-682 PTFE Liner. This liner is a critical component designed to ensure smooth and consistent wire feeding in Miller XR-M MIG Guns. To ensure safe and optimal performance, please read this instruction manual thoroughly before installation and use. Keep this manual for future reference.

2. Safety Information

Always observe general welding safety practices. While this product is a consumable liner, improper handling or installation can lead to equipment malfunction or injury. Ensure the MIG gun is disconnected from power before performing any maintenance or installation. Wear appropriate personal protective equipment (PPE) when working with welding equipment.

3. Product Overview

The Radnor Model 136-682 is a PTFE (Polytetrafluoroethylene) liner specifically engineered for use with Miller XR-M MIG Guns. Its PTFE construction provides a low-friction path for welding wire, reducing drag and preventing wire feeding issues. This liner is compatible with wire sizes ranging from .023" to .035" and has a length of 6.875".

Figure 3.1: An image showing the Radnor Model 136-682 PTFE Liner, coiled for packaging. This liner is designed to facilitate smooth wire feeding in Miller XR-M MIG Guns.

4. Setup and Installation

1. Disconnect Power: Ensure the welding machine is turned off and disconnected from the power source before beginning installation.
2. Remove Old Liner: If replacing an existing liner, carefully remove it from the MIG gun according to the Miller XR-M MIG Gun's specific instructions.
3. Prepare New Liner: Uncoil the Radnor 136-682 PTFE liner. Ensure it is straight and free of kinks.
4. Insert Liner: Feed the new PTFE liner into the MIG gun from the rear (wire feeder end) until it emerges from the front (nozzle end).
5. Trim Liner: Once fully inserted, trim the liner to the appropriate length as specified by your Miller XR-M MIG Gun manual. The liner should extend slightly beyond the contact tip holder but not interfere with the contact tip or nozzle.
6. Secure Connections: Ensure all connections are secure and the liner is properly seated within the gun.
7. Test Wire Feed: Reconnect power and carefully test the wire feeding mechanism to ensure smooth operation before welding.

5. Operating Guidelines

The PTFE liner's primary function is to guide the welding wire from the wire feeder to the contact tip with minimal friction. During operation, ensure that the wire size being used is compatible with the .023" - .035" range of this liner. Proper wire tension and spool braking are also crucial for optimal wire feeding performance, which the liner supports by providing a consistent path.

6. Maintenance

Regular maintenance of your PTFE liner is essential for consistent welding performance and to extend the life of your MIG gun.

• Inspection: Periodically inspect the liner for signs of wear, kinking, or contamination. A worn or damaged liner can lead to erratic wire feeding.
• Cleaning: If wire feeding becomes sluggish, the liner may be contaminated with debris or wire shavings. Disconnect power and carefully remove the liner. Use compressed air to blow out any obstructions. Avoid using harsh chemicals that could damage the PTFE material.
• Replacement: Replace the liner if it shows significant wear, kinking, or if cleaning does not resolve wire feeding issues. The lifespan of the liner depends on usage frequency and environmental conditions.

7. Troubleshooting

8. Specifications

• Model: Radnor 136-682
• Consumables Type: Liner
• Material: PTFE (Polytetrafluoroethylene)
• Compatible Wire Sizes: .023" - .035"
• Length: 6.875"
• MIG Gun Compatibility: Miller XR-M MIG Guns

9. Warranty and Support

For information regarding warranty coverage or technical support for your Radnor Model 136-682 PTFE Liner, please contact your authorized Radnor distributor or the point of purchase. Keep your purchase receipt as proof of purchase.