The Dewalt DCST990M1 is a powerful and versatile cordless string trimmer that’s designed to make yard maintenance a breeze. Whether you’re looking to tame tough weeds or perfect the edges of your lawn, this tool is an essential part of your outdoor toolkit. However, like any high-performing equipment, the grass trimmer occasionally needs attention, especially in the form of line replacement. Learning how to change the line on your Dewalt DCST990M1 quickly and efficiently not only improves your experience but also boosts the performance of this reliable tool.
In this comprehensive guide, we will cover everything you need to know about changing the line on your Dewalt DCST990M1, including key tips, step-by-step instructions, and preventive maintenance.
Understanding the Dewalt DCST990M1 String Trimmer
Before diving into the process of changing the line, it’s helpful to understand the core features of the Dewalt DCST990M1. This tool is powered by a 60V battery, making it a superb choice for those who want an eco-friendly solution without sacrificing power. It’s equipped with a brushless motor that enhances performance and extends runtime, ensuring you can take on even the most challenging outdoor tasks.
A fundamental aspect of the Dewalt DCST990M1 is its dual-line, bump feed system, which allows you to control the length of the string for optimal cutting efficiency. To keep this system functioning correctly, regular line changes are essential, especially when the string becomes worn or breaks.
Preparing for Line Replacement
Before you start the line replacement process, it’s crucial to gather the necessary materials and tools. Here’s a list of what you’ll need:
- Dewalt DCST990M1 string trimmer
- Replacement string (0.080″ or 0.095″ diameter recommended)
- Scissors or a cutting tool
- Safety goggles
- Gloves
Once you have all the necessary items, follow these preparatory steps:
- Power Down: Always ensure that the trimmer is switched off and unplugged from its power source to prevent accidents.
- Wear Safety Gear: Put on gloves and safety goggles to protect against debris and any potential injuries.
Selecting the Right Replacement String
The string diameter for the Dewalt DCST990M1 typically ranges from 0.080 inches to 0.095 inches. Choose the line based on your trimming needs:
- For general yard work, a line with a 0.080-inch diameter is sufficient.
- For tougher terrain with thicker weeds and grass, consider using a 0.095-inch diameter line.
Using the wrong diameter can negatively affect performance and efficiency.
Step-by-Step Guide to Changing the Line on Dewalt DCST990M1
Now that you’re prepared, let’s proceed with the line replacement. Follow these detailed instructions:
Step 1: Remove the Spool Cap
To access the line, start by removing the spool cap.
- Locate the cap at the head of the trimmer, which will have notches indicating where you can apply pressure to release it.
- Press the notches with your fingers or a tool to pop off the cap gently.
Step 2: Remove the Spool
Once the spool cap is removed, it’s time to take out the old spool.
- Carefully pull the spool straight out of the head.
- Inspect the spool for wear and tear, ensuring that the new line won’t get caught or tangled inside.
Step 3: Prepare the New Line
Cut a piece of the replacement string to your desired length. A length of 10 to 15 feet is usually sufficient to replace the line effectively. This size provides enough string for optimal trimming without tangling issues.
Step 4: Load the New Line
Loading the new line onto the spool is pivotal for smooth operation.
- Hold the spool with the notches facing up.
- Insert one end of the string into the designated hole in the spool.
- Wind the string around the spool in the direction of the arrows printed on the spool. Ensure that the line is evenly distributed to prevent uneven wear.
- Leave a few inches of string hanging out for later use.
Step 5: Reinsert the Spool
Now that your spool is ready:
- Insert the spool back into the trimmer head.
- Ensure it seats properly and that the string unwinds smoothly from the spool beneath the cap.
Step 6: Replace the Spool Cap
After the spool is in place:
- Align the spool cap with the notches.
- Press down firmly until it clicks into place, securing the spool.
Step 7: Test the Trimmer
Before proceeding with your trimming tasks, it’s wise to test the trimmer.
- Power the trimmer on and allow it to run.
- Check the line feed by gently bumping the head on the ground. Observe if the line feeds out correctly.
If your line feeds as expected, congratulations! You’ve successfully changed the line on your Dewalt DCST990M1.
Preventive Maintenance for Your Dewalt DCST990M1
To ensure a long lifespan for your string trimmer and improve efficiency, regular maintenance is essential. Here are some effective preventive maintenance tips:
Regular Line Inspection
Frequently check the line for wear. If you notice fraying, cutting, or breakage, replace the line immediately to maintain optimal performance.
Keep the Trimmer Clean
After each use, clean the trimmer head and motor housing to remove grass clippings, dirt, and debris. This action prevents buildup that can lead to malfunctions.
Battery Care
To maximize the lifespan of your battery, never leave it on the charger for prolonged periods. Use the battery effectively and ensure it’s charged during off-season months.
Consult the Manual
Always refer to the operator’s manual for specific recommendations on care, maintenance intervals, and other essential information tailored to your Dewalt DCST990M1.
Conclusion
Changing the line on your Dewalt DCST990M1 might seem daunting at first, but with this detailed guide, you’ll find it an easy and rewarding task. Keeping your trimmer maintained ensures that it performs at its best while making your yard work more efficient and enjoyable. Remember, regularly checking your line, inspecting the trimmer, and practicing proper maintenance will prolong its lifespan and improve its performance.
Armed with this knowledge, you can confidently tackle any trimming task without hesitation. Happy trimming!
What tools do I need to change the line on my Dewalt DCST990M1?
To change the line on your Dewalt DCST990M1, you will need a few essential tools, including a replacement line spool and a pair of scissors. The replacement line must be of the appropriate gauge, typically 0.080 inches for this model. Having a flat surface or workbench to operate on can also make the process smoother, as it allows for better stability and easier manipulation of the trimmer.
Additionally, it may be helpful to have a small screwdriver on hand to remove any cover or access panels, although many models come with a no-tool line replacement feature. Always refer to the user manual for specific recommendations on tools and accessories that work best for your trimmer, ensuring you have everything ready before you begin the line-changing process.
How often should I change the line on my Dewalt DCST990M1?
The frequency of changing the line on your Dewalt DCST990M1 can depend on how often you use the trimmer and the types of materials you’re cutting. If you’re trimming regularly or tackling tough vegetation, you might find yourself changing the line weekly or even more frequently. In contrast, for lighter use or occasional trimming, you may only need to replace the line every few months.
Monitoring the length and condition of the line can also help determine when it needs changing. If the line becomes frayed, thin, or breaks frequently, it’s a sign that it is time for a replacement. Keeping a close eye on the line’s condition will ensure optimal performance and efficiency during your mowing tasks.
Can I use any type of line with the Dewalt DCST990M1?
No, it is best to use the recommended type of line specifically designed for the Dewalt DCST990M1. This model typically uses 0.080 inches diameter line, and using an incorrect size can lead to suboptimal performance and possible damage. It’s important to choose a line that is compatible with the trimmer’s specifications to ensure that it reels out properly and provides effective cutting.
Additionally, there are various types of lines available in the market, such as round, square, or twisted shapes, each designed for different cutting applications. For best results, consider using the manufacturer’s original line or a high-quality replacement that matches the specifications outlined in the user manual for optimal performance and longevity.
What is the procedure for changing the line on the Dewalt DCST990M1?
Changing the line on the Dewalt DCST990M1 typically involves a series of simple steps. First, you will need to unplug the trimmer or remove the battery for safety. Next, locate the spool cover at the base of the trimmer. Depending on the design, you may have to press tabs or use a screwdriver to remove the cover, exposing the line spool inside.
Once you have access to the spool, remove any remaining line by pulling it out gently. Then, cut a new piece of line to the required length, approximately 25 feet is standard. Insert one end into the designated hole on the spool and wind it in the direction indicated, usually marked with arrows. After winding, secure the line, replace the spool cover, and you’re ready to go!
What should I do if the line keeps breaking on my Dewalt DCST990M1?
If the line on your Dewalt DCST990M1 keeps breaking, there are several troubleshooting steps you can take. First, ensure that you are using the correct type and gauge of line for your model. If the line is too thin or not designed for your specific trimmer, it may be more prone to breaking. Check also for nicks and damage on the spool or trimmer head that could cause undue wear on the line.
Another potential cause for frequent line breaks could be the cutting technique you’re using. Avoid making contact with hard surfaces like rocks or concrete, which can lead to unnecessary strain on the line. Lastly, consider the condition of your environment; if you are frequently trimming dense or challenging foliage, you might need to upgrade to a more robust line type that can withstand more intensive applications.
How can I prevent the line from getting tangled while changing it?
To prevent the line from tangling while changing it on your Dewalt DCST990M1, it’s important to approach the process with care. When winding the line onto the spool, make sure to follow the directional arrows and wind it evenly and tightly. If the line is wound too loosely or irregularly, it can lead to tangles when you attempt to use the trimmer.
Additionally, before replacing the spool cover, check that the line is properly secured. Ensure there are no excessive twists or knots that could affect how the line feeds. Taking your time to wind the line correctly and checking for any irregularities can greatly reduce the chances of tangling during operation.
Is there a specific technique for loading the line in the spool?
Yes, there is a methodical technique for loading the line into the spool of your Dewalt DCST990M1 to ensure smooth operation. First, after removing the cover, locate the anchor hole on the spool. Insert one end of the line into this hole and then wind the line around the spool in the direction indicated by the arrows. It’s essential to maintain even tension while winding to prevent any snags or tangling.
When you reach the end of the line, leave a few inches free to hang out of the spool. This will make it easier for the line to feed out during use. Finally, secure the line in place by following the manufacturer’s instructions, replace the spool cover, and you’re ready to trim confidently with minimal hassle.
What should I do if the trimmer doesn’t feed the line automatically?
If your Dewalt DCST990M1 is not feeding the line automatically, there are a few common issues to check. First, ensure that the line is loaded correctly within the spool. If the line is tangled or improperly wound, it may not feed out when you tap the trimmer’s head against the ground. You can open the trimmer head again to inspect the spool to ensure that everything is in order.
Another possible reason for line feed issues could be the condition of the spool or the trimmer head itself. If these parts are worn or damaged, they may not function properly. Replacing any broken components and ensuring everything is in good working condition should resolve the feeding issue and restore your trimmer’s efficiency.