Disassembling a tool like the Dewalt DW939 Circular Saw might seem daunting at first, but with the right approach and guidance, you can do it effectively and safely. Whether you’re performing maintenance, replacing parts, or simply getting to know your tool better, this step-by-step guide will ensure you’re well-equipped to handle the task.
Why Disassemble Your Dewalt DW939 Circular Saw?
Before diving into the disassembly process, it’s crucial to understand the reasons behind it. Here are a few instances when disassembling your circular saw makes sense:
- Maintenance: Regular maintenance can enhance the longevity of your saw.
- Part Replacement: If specific components are worn out or broken, you’ll need to disassemble the saw for replacements.
- Cleaning: Dust and debris can accumulate inside the tool, affecting its efficiency.
In this comprehensive guide, we’ll cover everything from preparation to reassembly to ensure that you can handle your circular saw confidently and correctly.
Preparation: Tools and Safety Measures
Embarking on a disassembly project requires the right tools and safety precautions. Before proceeding, gather the necessary tools and follow safety guidelines.
Essential Tools
To disassemble the Dewalt DW939, you’ll need the following tools:
- Philips screwdriver
- Flathead screwdriver
- Hex wrench set
- Allen wrench set
- Plier set
- Multimeter (for electrical component checks)
Safety Gear
Always keep safety as your top priority. Here are some safety measures to consider:
- Wear safety goggles to protect your eyes from dust and debris.
- Use gloves to protect your hands from sharp edges and parts.
Step-by-Step Disassembly Guide for the Dewalt DW939 Circular Saw
Once you’ve prepared and gathered the necessary tools, you can start disassembling your circular saw. Below, we’ll provide a detailed step-by-step guide to help you through the process.
Step 1: Unplug the Circular Saw
Before disassembling anything, ensure that the saw is completely disconnected from the power source. This simple step is crucial for your safety.
Step 2: Remove the Blade
The first part to disassemble is the circular saw blade. Follow these steps:
- Locate the blade lock button; usually, it is positioned near the blade guard.
- Press the lock button and use the appropriate wrench to unscrew the blade nut.
- Carefully remove the blade from the arbor. Make sure to set the blade aside in a safe place.
Step 3: Remove the Blade Guard
The blade guard protects users from unintentional contact with the blade. To remove it:
- Locate the screws holding the guard in place.
- Using a Philips screwdriver, unscrew these screws and lift the guard away from the saw, placing it aside.
Step 4: Detach the Front and Rear Housing
With the blade and guard removed, we can focus on dismantling the housing:
- Identify the screws holding the front and rear housing together, usually found along the body of the saw.
- Carefully unscrew these screws using the Philips screwdriver.
- Once unscrewed, gently pull apart the front and rear housing. Note any wires attached to the housing that may need disconnecting.
Step 5: Disconnect Electrical Components
The electrical components may be complex, so take your time:
- Locate the motor and other electrical assemblies.
- Gently disconnect any wires; it’s best to photograph or label them for reference during reassembly.
- Remove screws or clips holding the motor in place and carefully lift it out.
Step 5.1: Inspect the Components
Before proceeding, it’s advisable to check the electrical components with a multimeter. This will help you identify any damaged parts that need replacement.
Step 6: Remove the Footplate
The footplate allows the saw to rest on the surface being cut. Here’s how to remove it:
- Locate the screws securing the footplate to the saw body.
- Remove these screws and carefully lift the footplate off the saw.
Step 7: Detach the Handle
Disassembling the handle gives you access to the switch and trigger.
- Locate the screws securing the handle and remove them with a screw driver.
- Gently pull the handle away from the saw body.
- Detach the wiring connected to the switch, using your references if necessary.
Step 8: Complete Disassembly
With all essential parts removed, you can continue to disassemble any additional components if required.
- Inspect the remaining pieces and determine if they need to be removed or replaced.
- Follow the same unscrewing method as before for in-depth components.
Cleaning Your Circular Saw
After disassembling, clean the components thoroughly for optimal performance.
Step 1: Dust Removal
Use a compressed air canister or a soft brush to remove dust and debris from all pieces. Pay special attention to the motor, bearings, and internal mechanisms.
Step 2: Lubrication
Consider applying lubricant to parts like the shaft and bearings, as appropriate, to ensure optimal functioning during reassembly.
Reassembly: Putting Your Dewalt DW939 Back Together
Once you’ve cleaned or replaced necessary components, the next step is reassembly. Follow the disassembly steps in reverse for an organized reassembly process.
Step 1: Start with the Handle
- Reattach the wiring, ensuring it corresponds with your notes.
- Position the handle against the saw body and secure it with screws.
Step 2: Reattach the Footplate
- Position the footplate over the contact points and secure it with screws.
Step 3: Reassemble Electrical Components
- Place the motor back within the housing and secure with screws.
- Reattach any wires according to your reference.
Step 4: Reattach the Blade Guard
Position the blade guard over its specified spot and secure it with screws.
Step 5: Reinstall the Blade
- Place the blade back onto the arbor.
- Use the wrench to secure the blade nut firmly after pressing the lock button.
Step 6: Final Checks
Make sure all parts are securely placed and verify that no tools or loose components are left inside the body.
Testing and Safety Tips
After reassembly, plug in your circular saw. Perform a test run without a blade to ensure everything operates smoothly.
Remember the following safety tips:
- Always store the saw in a safe and dry place.
- Regularly clean and maintain the tool to ensure longevity.
- If you’re unsure about any part of the process or encounter issues, it’s best to consult the user manual or a professional.
Conclusion
Disassembling the Dewalt DW939 Circular Saw might have initially appeared complicated, but now you should feel confident in your ability to perform this task. From maintenance checks to part replacements, knowing how to disassemble your circular saw ensures its longevity, performance, and safety.
By following this comprehensive guide, not only have you learned how to disassemble your circular saw, but you’ve also gained valuable insights into its components and care. So go ahead and tackle those disassembly projects knowing you have the skills to succeed!
What are the key tools required for disassembling the Dewalt DW939 Circular Saw?
The primary tools needed for disassembling the Dewalt DW939 Circular Saw include a set of screwdrivers (both flat-head and Phillips), a hex wrench, and a pair of pliers. You may also want to have a torque wrench on hand for reassembling the saw, ensuring that you secure all screws to the manufacturer’s specifications. A soft cloth or mat can help protect components during the disassembly process.
It’s also advisable to have a small container to keep screws and parts organized as you remove them, which can prevent loss and make reassembly easier. For safety, wearing gloves and eyewear is recommended to protect your hands and eyes from potential sharp edges or debris during the process.
What safety precautions should I take before disassembling the saw?
Before starting the disassembly of the Dewalt DW939 Circular Saw, ensure that the tool is unplugged from any power source. It’s crucial to double-check that the saw is completely off and has no battery inserted, as accidental power can lead to serious injuries. Make sure to work in a well-ventilated area and stay focused on the task at hand to minimize distractions.
Additionally, wearing protective gear such as safety glasses, gloves, and a dust mask can protect you from any flying debris or dust particles created during disassembly. Keeping your workspace clean and organized can also help in maintaining safety by preventing tripping hazards or the misplacement of tools.
How do I remove the blade from the Dewalt DW939 Circular Saw?
To remove the blade from the Dewalt DW939 Circular Saw, first ensure that the saw is unplugged. Then, look for the blade lock button, usually located near the blade guard. Press this button to lock the blade in place, preventing it from spinning. Use an appropriate wrench to unscrew the bolt that secures the blade to the arbor, turning it counterclockwise.
Once the bolt is removed, you can lift the blade off the arbor carefully. Make sure to check the blade guard and any surrounding components for any debris or dust, as cleaning these areas can assist in the smooth operation of the saw when you reassemble it. Always handle the blade with caution to avoid cuts or injuries.
What common issues can I expect while disassembling the saw?
While disassembling the Dewalt DW939 Circular Saw, you may encounter common issues such as stuck screws or components. Over time, screws can become rusted or corroded, making them difficult to remove. In such cases, applying a penetrating oil to the screws may help loosen them, allowing you to proceed with the disassembly. Always use the correct size of screwdriver or wrench to avoid stripping the screws.
Another potential issue can be the misplacement of small parts like screws or springs. It’s easy to overlook tiny components when working, so organizing your workspace and using containers can help mitigate this issue. Take your time and be methodical; rushing can lead to mistakes that may complicate the reassembly process.
How should I document the disassembly process for reassembly?
Documenting the disassembly process can be incredibly helpful for reassembly. You can consider taking pictures at each step of the disassembly process to capture how parts fit together. Make sure to focus on the orientation of screws, springs, and any components that need to go back into specific positions, as these details can be crucial during reassembly.
Another effective method is to create a written log or checklist that outlines each step taken during disassembly. This log can include notes about the placement of screws and any observations regarding the condition of the parts. Having this documentation handy will not only ease the reassembly process but also help if you encounter any future maintenance issues.
What maintenance tips should I follow after reassembling the saw?
After reassembling the Dewalt DW939 Circular Saw, it’s vital to perform a thorough inspection of the tool before using it. Check all bolts and screws to ensure they are secure and at the right torque. Inspect the blade to ensure it’s properly aligned and that the guard functions correctly. Performing these checks can help ensure your safety and the tool’s optimal performance.
Regular maintenance should also include cleaning the saw after each use to remove dust and debris, which can accumulate and affect its functioning. Lubricate any moving parts as per the manufacturer’s recommendations to minimize wear and tear. Regular checks on the condition of the blade and other components will help prolong the lifespan of your circular saw and maintain its effectiveness in future projects.