1. Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your DEWALT DCMPS520 20V XR Cordless Pruning Saw. Please read this manual thoroughly before using the tool and keep it for future reference.
The DEWALT DCMPS520 is a lightweight and compact cordless pruning chainsaw featuring a high-efficiency brushless motor. It is designed for tasks such as trimming branches, cutting bundles of wood, and general pruning needs. Its compact design allows for easy access to tight spaces, and it includes an integrated tip guard for stability during upcuts and an onboard wrench for quick chain tensioning.
Note: This product is sold as a bare unit, excluding batteries and chargers.
2. General Safety Instructions
WARNING: Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.
- Work Area Safety: Keep work area clean and well lit. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Personal Safety: Always wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, gloves, and sturdy footwear. Do not overreach; keep proper footing and balance at all times.
- Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.
- Battery Tool Use and Care: Recharge only with the charger specified by the manufacturer. Use power tools only with specifically designated battery packs.
- Kickback Safety: Be aware of kickback, which can occur when the moving chain contacts an object at the upper quadrant of the guide bar's nose. Always maintain a firm grip with both hands on the saw.
- Maintenance: Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts, and any other condition that may affect the power tool’s operation.
3. Components Overview
Familiarize yourself with the main components of your DEWALT DCMPS520 Pruning Saw:
- Guide Bar
- Saw Chain
- Chain Tensioning Knob
- Integrated Tip Guard
- Front Handle
- Rear Handle
- Trigger Switch
- Battery Release Button
- Battery Port (Battery not included)
- Oil Tank Cap
4. Setup and Assembly
4.1 Unpacking
Carefully remove the pruning saw and all accessories from the packaging. Inspect the tool for any damage. Ensure all components listed in the 'Components Overview' are present.
4.2 Battery Installation (Battery and Charger Sold Separately)
- Ensure the saw is turned off and the trigger is disengaged.
- Align the battery pack with the battery port on the tool.
- Slide the battery pack into the port until it clicks securely into place.
- To remove, press the battery release button and pull the battery pack out.
4.3 Chain and Bar Installation (If not pre-assembled)
Refer to the detailed instructions in the full manufacturer's manual for specific steps on installing the guide bar and saw chain. Ensure the chain is correctly oriented and seated in the guide bar groove.
4.4 Chain Tensioning
Proper chain tension is crucial for safe and efficient operation. The chain should be snug against the guide bar, but still able to be pulled around by hand. Use the onboard wrench and chain tensioning knob to adjust. A new chain may stretch during initial use, requiring frequent re-tensioning.
4.5 Oiling the Chain
Before each use, fill the oil tank with appropriate bar and chain oil. The saw features an automatic oiling system, but it's vital to ensure the tank is full to prevent damage to the chain and bar.
5. Operating Instructions
5.1 Starting and Stopping
- Starting: Grip the saw firmly with both hands. Press the lock-off button (if present) and then squeeze the trigger switch to start the saw.
- Stopping: Release the trigger switch. The chain will stop quickly.
5.2 Cutting Techniques
- Pruning Branches: When pruning, support the branch to prevent it from pinching the chain. Make relief cuts if necessary for larger branches.
- Trimming: For smaller branches and brush, use a steady, controlled motion. The integrated tip guard helps stabilize the saw during upcuts.
- General Wood Cutting: Ensure the workpiece is stable and secure. Do not attempt to cut material thicker than the maximum cutting width of the saw.
5.3 Overload Protection
The saw is equipped with overload protection. If the motor slows down significantly or stops due to excessive load, release the trigger, remove the saw from the workpiece, and allow it to cool before resuming operation. Reduce the cutting pressure to prevent future overloads.
6. Maintenance
Always disconnect the battery pack before performing any maintenance or cleaning.
6.1 Cleaning
- After each use, clean the saw thoroughly. Remove sawdust, chips, and debris from the guide bar, chain, and motor housing.
- Use a soft brush or compressed air. Do not use solvents or harsh chemicals.
6.2 Chain Sharpening
A sharp chain is essential for safe and efficient cutting. Sharpen the chain regularly or replace it when dull. Refer to the manufacturer's guidelines for the correct file size and sharpening angles for a semi-chisel chain with a 3/8" pitch.
6.3 Guide Bar Maintenance
- Periodically clean the guide bar groove to remove accumulated debris.
- Flip the guide bar regularly to ensure even wear.
- Check the guide bar for burrs or damage and file them smooth if necessary.
6.4 Storage
Store the pruning saw in a dry, secure place, out of reach of children. Ensure the chain is properly oiled and tensioned before storage. Remove the battery pack if storing for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Saw does not start | Battery not charged or improperly installed; Trigger lock engaged; Faulty switch. | Charge battery and ensure it's securely installed; Release trigger lock; Contact service center if switch is faulty. |
| Chain does not move | Chain brake engaged; Chain too tight; Obstruction in chain path; Worn chain or bar. | Disengage chain brake; Adjust chain tension; Clear obstruction; Replace chain/bar if worn. |
| Poor cutting performance | Dull chain; Incorrect chain tension; Insufficient oil; Incorrect cutting technique. | Sharpen or replace chain; Adjust chain tension; Fill oil tank; Review operating instructions. |
| Saw overheats | Overloading the motor; Insufficient ventilation; Prolonged continuous use. | Reduce cutting pressure; Ensure vents are clear; Allow saw to cool down between uses. |
8. Specifications
| Feature | Specification |
|---|---|
| Brand | DEWALT |
| Model Number | DCMPS520 |
| Rated Voltage | 20V |
| Power Source | Battery (XR Li-Ion recommended) |
| Motor Type | Brushless |
| Bar Length | 20 cm (8") |
| Max. Cutting Width | 15 cm |
| Weight (Tool Only) | 2.1 KG |
| Chain Speed | 8.6 m/s² |
| Chain Type | Semi-Chisel |
| Chain Pitch | 3/8" |
| Drive Link Strength | 1.1 mm |
| Number Of Links | 34 |
| Oil Tank Capacity | 55 ml |
| Certification | CE |
| Application | Wood Saw, Pruning, Trimming |
9. User Tips
- Chain Tension: Always check and adjust chain tension before each use. A properly tensioned chain improves cutting efficiency and reduces wear.
- Lubrication: Keep the chain oil reservoir full. Adequate lubrication is critical for the longevity of the chain and guide bar.
- Safety Gear: Never operate the saw without proper safety gear, including safety glasses, hearing protection, and heavy-duty gloves.
- Cutting Technique: For cleaner cuts and to prevent kickback, let the saw do the work. Avoid forcing the saw through wood.
- Battery Management: Use fully charged batteries for optimal performance. Consider having a spare battery for longer tasks.
10. Warranty and Support
For warranty information, service, or technical support, please refer to the official DEWALT website or contact your authorized DEWALT dealer. Keep your proof of purchase for warranty claims.