Introduction
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your HART 40-Volt Cordless Attachment Capable Power Head, model HLST04PHVNM. Please read these instructions thoroughly before initial use and retain them for future reference.
The HART 40-Volt Power Head is designed to provide versatile outdoor power, compatible with HART 40V batteries and a range of HART and universal attachments (sold separately). This unit offers the convenience of battery power and variable speed control for various landscaping tasks.
Important Safety Information: Always follow safety instructions provided with each attachment. Use caution when operating the power head and attachments. Wear appropriate safety gear, including eye protection, gloves, and sturdy footwear.
Package Contents
- HART 40-Volt Cordless Attachment Capable Power Head (HLST04PHVNM)
- Handle Assembly
- Operator's Manual
Note: Battery, charger, and attachments are NOT included and must be purchased separately.
Setup
1. Attaching the Handle Assembly
The handle assembly provides improved control and comfort during operation. Follow these steps to attach it securely:
- Locate the handle assembly and the mounting points on the power head shaft.
- Position the handle assembly at a comfortable operating height.
- Secure the handle assembly using the provided hardware. Ensure all screws are tightened firmly.
2. Installing the Battery
The HART 40-Volt Power Head requires a HART 40V Lithium-Ion battery (sold separately).
- Ensure the power head is turned off.
- Align the battery with the battery port on the power head.
- Slide the battery into the port until it clicks securely into place.
- To remove the battery, press the release latch and slide the battery out.
3. Attaching an Accessory
The power head is attachment capable, allowing for various HART and universal attachments.
- Ensure the power head is turned off and the battery is removed.
- Consult the specific attachment's manual for detailed installation instructions.
- Align the attachment shaft with the power head's coupling.
- Push the attachment into the power head until it locks into place. Some attachments may require tightening a knob or lever.
- Verify the attachment is securely fastened before use.
Compatible HART Attachments:
- String Trimmer Attachment: HLST02LBVNM
- Hedge Trimmer Attachment: HTHDGVNM
- Edger Attachment: HTEDGVNM
- Brush Cutter Attachment: HTBRCVNM
- Pole Saw Attachment: HTPRNVNM
The power head is also compatible with universal fit attachments from other brands.
Operating Instructions
1. Pre-Operation Checklist
- Ensure the battery is fully charged.
- Verify all attachments are securely fastened.
- Inspect the work area for debris, obstacles, or bystanders.
- Wear appropriate personal protective equipment (PPE).
2. Starting and Stopping the Power Head
- To start: Insert a charged 40V battery. Press and hold the safety switch, then squeeze the variable speed trigger.
- To stop: Release the variable speed trigger.
3. Variable Speed Control
The power head features a variable speed trigger, allowing you to adjust the operating speed based on the task and attachment. Squeeze the trigger gently for lower speeds and more firmly for higher speeds. This provides optimal control and efficiency.
4. General Operation Tips
- Maintain a firm grip on the power head with both hands.
- Keep a balanced stance and be aware of your surroundings.
- Avoid operating in wet conditions or near electrical hazards.
- Do not force the tool; allow the attachment to do the work.
Maintenance
Regular maintenance ensures optimal performance and extends the life of your HART 40-Volt Power Head.
1. General Cleaning
- After each use, remove the battery and clean the power head and attachment.
- Use a clean, damp cloth to wipe down surfaces. Do not use harsh chemicals or abrasive cleaners.
- Ensure ventilation openings are free of debris to prevent overheating.
2. Attachment Maintenance
Refer to the specific attachment's manual for detailed maintenance procedures, such as replacing string trimmer line, sharpening blades, or lubricating moving parts.
3. Storage
- Store the power head and attachments in a dry, secure location, out of reach of children.
- Remove the battery from the power head before storing for extended periods.
- Store batteries in a cool, dry place, away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Power head does not start. | Battery not inserted correctly. Battery is discharged. Safety switch not engaged. | Ensure battery is fully seated. Charge the battery. Press and hold the safety switch before squeezing the trigger. |
| Reduced power or performance. | Battery charge is low. Attachment is clogged or damaged. Overheating. | Recharge the battery. Clear any obstructions or replace damaged attachment parts. Allow the tool to cool down. |
| Attachment not spinning. | Attachment not properly secured. Obstruction in the attachment. | Verify the attachment is correctly installed and locked. Remove battery, then clear any obstructions. |
If problems persist, contact HART customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Number | HLST04PHVNM |
| Power Source | 40-Volt Lithium-Ion Battery (sold separately) |
| Compatibility | HART 40V System and Universal Attachments |
| Item Weight | 5 Pounds (Power Head only) |
| Product Dimensions | 40"L x 6"W (Power Head only) |
| Manufacturer | Hart |
| UPC | 728370634914 |
Warranty and Support
For warranty information or technical support, please refer to the documentation included with your purchase or visit the official HART website. Keep your proof of purchase for warranty claims.
Customer Service: For assistance with your HART product, please contact HART customer support directly. Contact details can typically be found on the product packaging or the manufacturer's website.
Product Images

Image: The HART 40-Volt Cordless Attachment Capable Power Head, shown with a 40V battery inserted. The power head is white and black, featuring the HART logo and "40V" branding. This image illustrates the main unit of the product.