Introduction
This manual provides essential instructions for the safe and effective use of your RYOBI Straight Shaft Expand-It Trimmer Attachment, model RY15523A. This attachment is designed to convert compatible RYOBI Expand-It power heads into a string trimmer, offering versatility for various lawn and garden tasks. Please read this manual thoroughly before assembly, operation, or maintenance to ensure proper handling and to prevent injury or damage.
Important Safety Information
WARNING: Always adhere to safety guidelines to prevent serious injury. Failure to follow these instructions may result in electric shock, fire, and/or serious injury.
- Always use with a compatible RYOBI power head.
- Wear appropriate safety gear, including eye protection and gloves.
- Keep bystanders at a safe distance to avoid injury from flying debris.
- Do not use on dry or frozen grass to prevent excessive debris and potential fire hazard.
- Inspect the attachment before each use and keep it clean and well-maintained.
Package Contents
The RYOBI Straight Shaft Expand-It Trimmer Attachment RY15523A package includes the trimmer attachment only. The power head required to operate this attachment is sold separately.

An image of the RYOBI Straight Shaft Expand-It Trimmer Attachment RY15523A, showcasing its design and straight shaft. This attachment is designed to connect to a compatible RYOBI power head.
Setup
Attaching the Trimmer Attachment
- Ensure the power head is turned off and the battery pack (if applicable) is removed or the power cord is unplugged.
- Align the shaft of the trimmer attachment with the coupler on your RYOBI Expand-It power head.
- Push the attachment into the coupler until the lock button on the attachment snaps into the alignment hole on the power head.
- Tighten the coupler knob securely to ensure a firm connection. Do not overtighten.
- Gently pull on the attachment to confirm it is securely locked in place.

A detailed view of the trimmer head and the connection mechanism of the RYOBI Expand-It attachment, illustrating how it connects to a power unit.
Operating Instructions
Before Starting
- Always wear eye protection, long pants, and sturdy footwear.
- Clear the work area of any debris, rocks, or objects that could be thrown by the trimmer line.
- Ensure the trimmer line is properly installed and of the correct diameter for your power head.
Operation
- Hold the power head and attachment firmly with both hands.
- Start the power head according to its specific instructions.
- Maintain a comfortable and balanced stance.
- Use a sweeping motion to trim grass, keeping the trimmer head slightly above the ground.
- Avoid contact with hard surfaces, fences, or trees to prevent damage to the trimmer line and attachment.
- To advance the trimmer line, tap the bump head lightly on the ground while the trimmer is running at full speed.
Maintenance
Cleaning
- After each use, ensure the power head is off and disconnected from its power source.
- Clean the trimmer head and shaft with a damp cloth to remove grass clippings and debris.
- Remove any accumulated debris from the cutting guard.
Line Replacement
- Refer to your power head or trimmer attachment manual for specific instructions on replacing the trimmer line.
- Always use the recommended line diameter and type.
Storage
- Store the attachment in a dry, well-ventilated area, away from direct sunlight and extreme temperatures.
- Keep out of reach of children.
Troubleshooting
Attachment Not Engaging
- Ensure the attachment is fully inserted into the power head coupler and the lock button has engaged.
- Verify the coupler knob is securely tightened.
Poor Cutting Performance
- Check the trimmer line for wear or breakage; replace if necessary.
- Ensure the line is of the correct diameter and type.
- Clear any grass or debris wrapped around the trimmer head.
Specifications
| Product Dimensions | 33.6 x 4 x 5 inches |
| Item Model Number | RY15523 |
| Brand | RYOBI |
| Power Source | Battery (Power Head - Not Included) |
| Color | Black |
| UPC | 046396040633 |
Warranty and Support
For warranty information, please refer to the documentation provided with your RYOBI power head or visit the official RYOBI website. For technical support or service inquiries, please contact RYOBI customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
RYOBI Customer Service: Please refer to your power head manual or the RYOBI website for the most current contact information.







