Luoran Carbon Brushes Instruction Manual

1. Product Overview

These carbon brushes (Part Numbers: 0358938, 358938, 0857241, 857241) are designed as replacement components for 10-inch 15-Amp Sliding Compound Miter Saws. They are compatible with models SM2507LW and SM2516LW. Carbon brushes are critical components in electric motors, facilitating the transfer of electrical current to the rotating armature.

Image: A pair of Luoran replacement carbon brushes, featuring the carbon block, spring, and brass terminal, ready for installation.

Key features of these carbon brushes include:

• Compatibility with SM2507LW and SM2516LW miter saw models.
• Designed for 10-inch 15-Amp Sliding Compound Miter Saws.
• Essential for maintaining proper electrical contact and motor function.

2. Installation (Setup)

Proper installation of carbon brushes is crucial for the safe and efficient operation of your miter saw. Always ensure the tool is disconnected from the power source before beginning any maintenance or installation procedures.

2.1 Safety Precautions

• Disconnect Power: Always unplug the miter saw from the electrical outlet before inspecting or replacing carbon brushes.
• Wear Safety Gear: Use appropriate personal protective equipment, including safety glasses and gloves.
• Consult Saw Manual: Refer to your specific miter saw's instruction manual for detailed brush replacement procedures, as designs may vary.
• Work in a Well-Lit Area: Ensure adequate lighting to clearly see components.

2.2 Replacement Procedure

1. Locate Brush Caps: Identify the carbon brush caps on the motor housing of your miter saw. These are typically small, screw-in caps on the sides of the motor.
2. Remove Old Brushes:
   • Using a screwdriver (flathead or Phillips, depending on the cap), carefully unscrew and remove the brush caps.
   • Gently pull out the old carbon brushes. Note their orientation for reference.
   • Inspect the commutator (the copper segments on the motor's armature) for excessive wear or damage.
3. Insert New Brushes:
   • Carefully insert the new Luoran carbon brushes into the brush holders. Ensure the carbon block slides smoothly into the holder and the spring applies even pressure.
   • Make sure the wire lead from the brush connects properly to the internal terminal.
4. Secure Brush Caps: Screw the brush caps back into place, ensuring they are snug but not overtightened. Overtightening can damage the caps or housing.
5. Test Operation: After replacing both brushes, plug the saw back into the power source. Briefly run the saw to ensure proper operation. Initial sparking is normal as the new brushes seat themselves, but excessive sparking or unusual noises indicate an issue.

3. Operation Considerations

Once the new carbon brushes are installed, the miter saw should operate with restored power and reduced sparking. New brushes require a short "break-in" period to conform to the shape of the commutator. During this time, minor sparking may occur, which should diminish with use.

• Initial Run-in: Operate the saw without load for a few minutes to allow the brushes to seat properly.
• Observe Performance: Monitor the saw for consistent power, smooth operation, and minimal sparking during use.

4. Maintenance

Regular inspection and timely replacement of carbon brushes are essential for extending the life of your miter saw's motor and maintaining optimal performance.

• Periodic Inspection: Inspect carbon brushes every 50-100 hours of operation, or if you notice a decrease in power, excessive sparking, or unusual motor noise.
• Replacement Criteria: Replace brushes when they are worn down to approximately 1/4 inch (6mm) of their original length, or if they appear chipped, cracked, or unevenly worn.
• Cleanliness: Keep the motor's ventilation openings clear of dust and debris to ensure proper cooling, which indirectly affects brush life.

5. Troubleshooting

If you encounter issues after replacing the carbon brushes, consider the following common problems and solutions:

If problems persist after following these steps, it is recommended to consult a qualified power tool technician or contact the saw manufacturer for further assistance.

6. Specifications

The following specifications apply to the Luoran Carbon Brushes (Part Numbers: 0358938, 358938, 0857241, 857241):

7. Warranty and Support

Information regarding specific warranty coverage for these carbon brushes is not provided. For warranty inquiries or technical support, please refer to the original purchase documentation or contact the seller directly. For general product information or assistance with Luoran products, you may visit the Luoran Store on Amazon.