1. Introduction
This manual provides essential information for the installation and maintenance of your Jyving carbon brush replacement set. These carbon brushes are designed as direct replacements for specific BOSCH angle grinder models, ensuring proper function and extending the lifespan of your power tool. Please read this manual carefully before proceeding with any installation or maintenance.
2. Product Overview and Features
The Jyving carbon brushes are critical components for the electric motor in your angle grinder. They are designed to conduct current to the rotating armature. This replacement set includes two carbon brushes, each featuring a cutoff mechanism for enhanced motor protection.
- Material: High-quality carbon and metal for durability and efficient conductivity.
- Cutoff Feature: Integrated cutoff mechanism designed to stop the motor when the brush wears down to a critical level, preventing damage to the motor commutator.
- Fine Workmanship: Manufactured to precise specifications for reliable performance and long service life.
Image 2.1: Jyving carbon brushes featuring the integrated cutoff mechanism. This mechanism is designed to protect the motor by interrupting the circuit when the brush reaches its wear limit.
3. Compatibility
These carbon brushes are compatible with the following BOSCH angle grinder models:
- BOSCH GWS7
- BOSCH GWS 7-100
- BOSCH GWS 7-115
- BOSCH GWS 7-125
- BOSCH GOP250CE
- BOSCH GWS720
Always verify the dimensions of your existing carbon brushes against the specifications provided in this manual to ensure proper fitment.
4. Specifications
| Attribute | Value |
|---|---|
| Material | Carbon, Metal |
| Dimensions (L x W x H) | 13mm x 8mm x 6.5mm (Approx.) |
| Quantity | 1 Pair (2 pieces) |
| Feature | With Cutoff |
Image 4.1: Detailed dimensions of the Jyving carbon brushes, showing 13mm length, 8mm width, and 6.5mm height.
5. Installation (Setup)
Replacing carbon brushes requires careful attention to safety and proper procedure. If you are unsure about any step, consult a qualified technician.
5.1 Safety Precautions
- ALWAYS disconnect the power tool from the power source before attempting any maintenance or installation.
- Wear appropriate personal protective equipment (PPE), such as safety glasses.
- Work in a well-lit and clean area.
5.2 Replacement Procedure
- Disconnect Power: Ensure the angle grinder is unplugged from the electrical outlet.
- Locate Brush Caps: Identify the brush caps on the motor housing of your angle grinder. These are typically small, round or rectangular covers, often secured with a screw or a twist-off cap.
- Remove Old Brushes: Carefully unscrew or uncap the brush holders. Remove the old, worn-out carbon brushes and their springs. Note the orientation of the old brushes for correct installation of the new ones.
- Clean Brush Holders: Gently clean any carbon dust or debris from the brush holders and surrounding areas.
- Insert New Brushes: Insert the new Jyving carbon brushes into the brush holders. Ensure they slide freely and are oriented correctly, matching the angle of the commutator. The wire lead should connect properly.
- Secure Brush Caps: Replace and tighten the brush caps securely. Do not overtighten.
- Test: Plug the grinder back into the power source and perform a brief test run to ensure proper operation. Listen for unusual noises and observe for excessive sparking.
Image 5.1: A pair of Jyving carbon brushes, illustrating their general appearance before installation into the angle grinder.
6. Operating (Post-Installation)
After replacing the carbon brushes, the angle grinder should operate as intended. Allow the grinder to run for a short period (e.g., 30 seconds to 1 minute) without load to allow the new brushes to seat properly against the commutator. During this initial run, minor sparking is normal as the brushes conform to the commutator's surface.
Always refer to your original BOSCH angle grinder's instruction manual for specific operating procedures and safety guidelines related to the tool itself.
7. Maintenance
Carbon brushes are wear items and require periodic inspection and replacement. The lifespan of carbon brushes varies depending on usage intensity and conditions.
- Regular Inspection: Periodically inspect the carbon brushes for wear. If they appear significantly shortened or if the motor performance degrades (e.g., reduced power, excessive sparking, intermittent operation), it may be time for replacement.
- Dust Removal: Keep the motor's ventilation openings clear of dust and debris to ensure proper cooling and prevent premature brush wear.
- Cutoff Feature: The integrated cutoff feature will automatically stop the tool when the brushes are excessively worn, indicating that replacement is necessary.
8. Troubleshooting
If your angle grinder does not operate correctly after replacing the carbon brushes, consider the following:
- No Power: Ensure the grinder is properly plugged in and the power switch is on. Check if the brushes are fully seated and their wire leads are making proper contact.
- Excessive Sparking: While some initial sparking is normal, excessive or continuous heavy sparking may indicate improper brush seating, a damaged commutator, or incorrect brush type. Re-check brush installation.
- Intermittent Operation: This could be due to loose connections, brushes not sliding freely in their holders, or a damaged power cord.
- Reduced Power: Ensure the brushes are making full contact with the commutator. If the issue persists, the problem may lie with other internal components of the grinder.
If troubleshooting steps do not resolve the issue, consult a qualified power tool repair technician.
9. Safety Information
Always prioritize safety when working with power tools and their components. Improper handling or installation can lead to injury or damage to the tool.
- Disconnect Power: Always unplug the tool before any inspection, maintenance, or part replacement.
- Use Correct Parts: Only use replacement parts that are specified for your tool model. Using incorrect parts can lead to malfunction and safety hazards.
- Proper Installation: Ensure all parts are installed correctly and securely.
- Keep Clean: Maintain a clean work environment and keep the tool free of dust and debris.
- Professional Help: If you are not confident in performing maintenance, seek assistance from a qualified professional.
10. Warranty and Support
Specific warranty information for this Jyving carbon brush replacement set is not provided in the product details. For any inquiries regarding this product, please contact the seller or refer to the original purchase documentation.