how to change welding hose on lincoln sp-135

How to Change Welding Hose on Lincoln SP-135

Introduction

The welding hose is an essential component of any welding machine. Over time, these hoses can wear out or get damaged, requiring replacement. If you own a Lincoln SP-135 welding machine and need to change the welding hose, this article will guide you through the process step-by-step. By following these instructions, you can easily replace the welding hose and ensure that your welding machine continues to function properly.

Understanding the Lincoln SP-135 Welding Machine

Before starting the hose replacement process, it's important to have a basic understanding of your Lincoln SP-135 welding machine. This compact welder is commonly used for light to medium fabrication and maintenance tasks. The machine operates on 115V household input power, making it suitable for use in home workshops, garages, or small businesses. The SP-135 provides a high-quality arc for welding mild steel, aluminum, and stainless steel up to 1/8 inch thick.

Identifying the Signs that Indicate a Hose Replacement

When it comes to welding hoses, it's crucial to recognize the signs that indicate a replacement is necessary. Some common indications include:

1. Visible damage: Inspect the hose for cracks, splits, or holes. Such damage can cause gas or coolant leaks, affecting the welding process.

2. Malfunctioning gas flow: If you notice inconsistent gas flow or irregular pressure, it may be due to a faulty hose.

3. Leakage: Any gas or coolant leaking from the hose is a clear indication that it needs to be replaced.

4. Poor electrode wire feeding: The hose carries the electrode wire, and any hindrance in its proper feeding can be caused by a damaged hose.

Gathering the Required Tools and Materials

Now it's time to gather the necessary tools and materials for the hose replacement process. You will need:

1. New welding hose: Purchase a replacement welding hose suitable for the Lincoln SP-135 model.

2. Adjustable wrench: Ensure you have a wrench that fits the hose fittings.

3. Pliers: These will help with loosening and tightening hose clamps.

4. Protective gloves and goggles: Wear these to ensure safety while working.

5. Replacement hose fitting connectors (if necessary): Depending on the condition of the existing connectors, you may need to replace them as well.

Step-by-Step Guide to Changing the Welding Hose

Follow these steps to change the welding hose on your Lincoln SP-135:

Step 1: Disconnect the power supply - Before starting any work, make sure your welding machine is turned off and unplugged from the power source.

Step 2: Release gas pressure - If your welding machine uses gas shielding, turn off the gas regulator and release any pressure by briefly pulling the trigger on the welding gun.

Step 3: Remove the wire feeder connection - Loosen the locking nut on the wire feeder tension arm and disconnect it from the wire feeder.

Step 4: Remove the old welding hose - Using an adjustable wrench, carefully loosen the hose fittings at each end of the hose. Then, remove both fittings, allowing the old hose to be disconnected from the machine.

Step 5: Attach the new welding hose - Take the new welding hose and ensure it is the correct length. Attach one end to the port on the welding machine and tighten the fitting using the adjustable wrench. Repeat this process for the other end of the hose.

Finishing the Hose Replacement Process

After attaching the new welding hose, complete the following steps:

1. Inspect for proper connections: Ensure that both hose fittings are tightly secured to avoid any potential leaks.

2. Reconnect wire feeder: Attach the wire feeder tension arm to the wire feeder, tightening the locking nut securely.

3. Reapply gas shielding: Turn on the gas regulator and check for consistent gas flow and pressure.

4. Test operation: Plug in your Lincoln SP-135 welding machine and perform a test weld to verify that the hose replacement was successful.

Conclusion

Changing the welding hose on a Lincoln SP-135 welding machine is a relatively straightforward process. By following the steps outlined in this article, you can replace the hose effectively and ensure the efficient functioning of your welding machine. Remember to prioritize safety throughout the process and consult the manufacturer's instructions for any specific guidelines related to your machine model.