The DeWalt DCS391 is a reliable and powerful cordless circular saw, favored by professionals and DIY enthusiasts alike. However, like any tool, it requires regular maintenance to ensure optimal performance. One of the key maintenance tasks is changing the brushes. In this comprehensive guide, we will walk you through everything you need to know about changing the brushes on your DeWalt DCS391, from understanding why brush replacement is essential to step-by-step instructions for performing the procedure yourself.
Understanding the Importance of Brush Replacement
Before delving into the “how-to” of changing brushes, let’s explore why it’s important. The brushes in your DeWalt DCS391 are a crucial component of the motor. They transfer electrical energy to the motor and help in converting it into the mechanical energy needed to operate the saw. Over time, these brushes wear down due to friction and electrical arcing.
Here are some of the significant reasons why you should replace brushes regularly:
- Optimal Performance: Worn brushes can lead to decreased performance, including decreased power output and speed, leading to poor cutting quality.
- Increased Lifespan: Regular maintenance, including brush replacement, helps extend the life of your tool by preventing potential damage to the motor.
- Safety: Faulty brushes can cause electrical shorts or even sparks, which can be hazardous during operation.
Identifying When to Change the Brushes
Recognizing when it’s time to change your brushes can save you from potential issues down the line. Here are some signs that indicate a brush replacement might be necessary:
Signs of Worn Brushes
- Decreased Power: If you notice a drop in the cutting ability or speed of your saw, it could be due to worn brushes.
- Sparking: Excessive sparking around the brush area can signal that your brushes are not making proper contact with the commutator.
Life Span of Brushes
Typically, the brushes in your DeWalt DCS391 can last somewhere between 40 to 80 hours of use, depending on the workload conditions. Always keep an eye on their condition and consider replacing them sooner if your usage is particularly heavy or in demanding environments.
What You Need for Brush Replacement
Before starting the replacement process, gathering the right tools and materials is essential. Here’s a quick checklist:
Tools Required
- Screwdriver (flathead or Phillips, depending on your model)
- Replacement brushes (ensure they are compatible with the DeWalt DCS391)
- Safety goggles
- Clean cloth
Step-by-Step Guide on How to Change Brushes on DeWalt DCS391
Now that you understand the significance of changing brushes and how to identify wear and tear, let’s dive into the step-by-step process of replacing them.
Step 1: Safety First
Before you begin any maintenance on your DeWalt DCS391, ensure you take proper safety precautions:
- Unplug the Tool: Always disconnect the battery or ensure the tool is switched off to avoid any accidental starting.
- Wear Safety Goggles: Protect your eyes from any dust or debris.
Step 2: Locate the Brush Cap
On the DeWalt DCS391, the brush caps are typically located on either side of the motor housing. You may need to refer to your user manual if you have difficulty locating them.
Step 3: Remove the Brush Caps
Using your screwdriver, carefully remove the screws holding the brush caps in place. Set these screws aside in a safe location, as you will need them later to reattach the caps.
Step 4: Take Out the Worn Brushes
Once the brush caps are off, gently pull out the worn brushes. Be cautious as they might be spring-loaded. Note their orientation for proper installation of the new ones.
Step 5: Install New Brushes
Take your new brushes and slide them into the slots, ensuring they are oriented in the same direction as the old ones. Make sure they are seated properly and that the springs are securely holding them in place.
Step 6: Replace the Brush Caps
Align the brush caps over the replaced brushes and secure them back in place with the screws you removed earlier. Ensure they are tight but avoid over-tightening, which could strip the screws.
Step 7: Final Check and Clean Up
After you have replaced the brushes and reattached the caps, it’s a good idea to do a visual inspection of the entire tool. Check for any loose parts or debris that may have gathered.
Use a clean cloth to wipe down the exterior of the saw, removing any dust or residue that could interfere with operation.
Step 8: Test Your Circular Saw
Reinsert the battery or plug the tool back in and power it on to ensure everything is functioning correctly. Listen for any unusual sounds and monitor the performance to ensure it’s back to optimal condition.
Maintaining Your DeWalt DCS391 for Longevity
To ensure your DeWalt DCS391 continues to perform well, regular maintenance is key. Here are a few tips to consider:
1. Regular Inspections:
Check your tool regularly for signs of wear, not just on the brushes but also on other components like the blade and its housing.
2. Keep It Clean:
Debris can damage your tool over time. Make it a habit to clean your circular saw after each use.
3. Use Genuine Parts:
Whenever replacement parts are necessary, including brushes, opt for genuine DeWalt parts to ensure the best fit and longevity.
Conclusion
Changing the brushes on your DeWalt DCS391 is a straightforward task that can have significant benefits for your tool’s performance and lifespan. By following this guide, you can confidently tackle brush replacement, ensuring that your circular saw continues to deliver the power and reliability that you expect from DeWalt equipment.
Always remember the importance of regular maintenance and keeping your tools in pristine condition. Happy sawing!
What are the signs that my DeWalt DCS391 needs new brushes?
The signs that your DeWalt DCS391 may need new brushes include decreased power, unusual motor noise, and sparks coming from the motor compartment. If you notice that the saw is struggling to cut through materials it would typically handle with ease, it may be time to inspect the brushes. Additionally, if you are hearing strange noises during operation, it is a good idea to take a closer look at the tool.
Another significant indicator is the presence of excessive sparking when the saw is in use. This can be a sign that the brushes have worn down too much and are no longer making proper contact with the commutator. If you observe any of these signs, it’s essential to act promptly to prevent potential damage to the motor and maintain optimal performance.
How often should I change the brushes on my DeWalt DCS391?
The frequency of brush replacement on your DeWalt DCS391 depends on usage and operating conditions. Typically, if you use the saw regularly, you should check the brushes every few months. Heavy use, such as cutting dense materials or extended periods of operation, may lead to quicker wear and necessitate more frequent inspections and replacements.
A good practice is to monitor the brush wear visually and replace them before they are completely worn out. Keeping a maintenance log can also be beneficial, as it helps you keep track of usage and conditions under which the tool operates, allowing for timely replacements as needed.
What tools do I need to change the brushes on my DeWalt DCS391?
To change the brushes on your DeWalt DCS391, you will need a few basic tools: a screwdriver, typically a Phillips head, and possibly a small flathead screwdriver for prying open covers. In addition, it may be helpful to have a flashlight to see clearly inside the motor compartment when accessing the brushes.
It’s also a good idea to have a pair of gloves to protect your hands, as well as a clean cloth to wipe any dust or debris from inside the motor area. While not strictly necessary, having a small container to hold the screws and old brushes can help keep your workspace organized throughout the process.
Can I use my DeWalt DCS391 while the brushes are worn?
Using your DeWalt DCS391 with worn brushes is not advisable, as it can cause further damage to the motor. Worn brushes may not make proper contact with the commutator, resulting in decreased power, overheating, and increased strain on the motor. This could potentially lead to permanent damage, which may be costly to repair.
Additionally, operating the tool in suboptimal conditions can compromise safety. Decreased performance can lead to accidents or mishaps during use, which poses a risk not only to the tool but also to the user. Therefore, it is best to replace worn brushes promptly to maintain both safety and performance.
How do I access the brushes on my DeWalt DCS391?
To access the brushes on your DeWalt DCS391, start by ensuring that the saw is unplugged to prevent any accidental starts during maintenance. Next, locate the brush caps on the sides of the motor housing. Using the appropriate screwdriver, carefully remove the screws holding the brush caps in place and set them aside.
Once the caps are off, you can gently pull out the brushes. Take care to note the orientation and positioning of the brushes, as this will help you install the new ones correctly. If the brushes are stuck, a gentle tap or a slight wiggle may help release them from their housing.
What should I do with old brushes after replacement?
After replacing the brushes on your DeWalt DCS391, it is important to dispose of the old brushes properly. Since carbon brushes may contain materials that could potentially harm the environment if disposed of improperly, it’s recommended to check local regulations regarding disposal of electronic waste. Many areas have designated facilities where such materials can be safely discarded.
Alternatively, you may consider recycling the old brushes if there are local programs available. Some manufacturers also offer take-back programs for worn-out parts, which can ensure they are recycled or disposed of responsibly. Always prioritize environmentally friendly options when it comes to disposing of tool components.
Where can I buy replacement brushes for my DeWalt DCS391?
Replacement brushes for your DeWalt DCS391 can be purchased through various outlets. Authorized DeWalt retailers or the official DeWalt website are the best places to find genuine parts, ensuring you receive quality replacements that fit correctly. These sources also often provide product information and warranty details.
In addition to official retailers, hardware stores, and home improvement centers may carry compatible brushes for your tool. Online marketplaces like Amazon or specialized tool websites also offer replacement parts at competitive prices, often with reviews that can guide your purchase. Always make sure to verify that the brushes are specifically designed for the DCS391 model before buying.