1. Introduction
Thank you for choosing the LISM Universal Bump Feed Line Trimmer Head. This manual provides essential information for the safe and effective use, installation, and maintenance of your new trimmer head. Designed for efficiency and ease of use, this head simplifies line replacement, allowing you to quickly get back to your gardening tasks.
2. Safety Information
Always prioritize safety when operating power tools. Failure to follow these instructions may result in serious injury.
- Wear Eye Protection: Always wear appropriate eye protection (safety glasses or goggles) when using the trimmer head to prevent debris from causing eye injury.
- Protective Gear: Wear sturdy footwear, long pants, and gloves to protect yourself from flying debris and potential cuts.
- Read Trimmer Manual: Refer to your power trimmer's instruction manual for additional safety guidelines specific to your equipment.
- Inspect Before Use: Before each use, inspect the trimmer head and line for any damage or wear. Replace worn or damaged parts immediately.
- Clear Work Area: Ensure the work area is clear of bystanders, pets, and objects that could be struck by the trimmer line.
- Maximum RPM: Do not exceed the maximum recommended operating speed of 10,000 RPM for this trimmer head.
3. Product Components
The LISM Universal Bump Feed Line Trimmer Head consists of the following main parts:
- Trimmer Head Casing (Orange)
- Bump Knob (Silver/Grey)
- Internal Spool
- Line Eyelets
- Trimmer Line (pre-installed or separate)
4. Installation and Line Replacement
4.1 Attaching the Trimmer Head
This trimmer head is designed for universal fit and is easy to attach. Simply screw it onto the existing shaft of your power trimmer. Ensure it has an M10 x 1.25 Left Rotation Way thread. Tighten securely before use.
4.2 Replacing the Trimmer Line (Bump Feed Method)
The LISM trimmer head features a convenient bump feed system for quick line replacement without disassembly.
- Align: Locate the 'PUSH' buttons on the side of the trimmer head. Press these buttons simultaneously to release the internal spool.
- Remove Old Line: If there's any old line remaining, remove it from the spool.
- Insert New Line: Feed a new length of trimmer line (recommended diameter as per your trimmer's specifications) through one of the eyelets on the side of the trimmer head. Continue pushing it through until it emerges from the opposite eyelet.
- Center the Line: Pull the line through until both ends extending from the eyelets are roughly equal in length.
- Wind the Line: While holding the line centered, twist the bump knob (the silver/grey part) in the direction indicated by the 'REWIND LINE' arrows on the head. The line will automatically wind onto the internal spool.
- Secure: Continue winding until only the desired length of line extends from each eyelet. The head is now ready for use.
5. Operation
5.1 Starting the Trimmer
Once the trimmer head is securely attached and the line is properly loaded, start your power trimmer according to its manufacturer's instructions.
5.2 Extending Trimmer Line (Bump Feed)
To extend the trimmer line during operation, lightly tap the bump knob on the ground while the trimmer is running at full speed. This action releases a small amount of line, which is then cut to the correct length by the trimmer's line limiter blade.
5.3 Cutting Technique
Maintain a steady and controlled motion. Avoid hitting hard surfaces, rocks, or fences, as this can damage the trimmer line and head.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your trimmer head.
- Cleaning: After each use, clean the trimmer head to remove grass clippings, dirt, and debris. Use a brush or cloth. Do not use harsh chemicals.
- Line Inspection: Regularly check the trimmer line for wear, fraying, or breakage. Replace the line as needed following the instructions in Section 4.2.
- Head Inspection: Periodically inspect the trimmer head casing and bump knob for cracks, damage, or excessive wear. Replace the entire head if significant damage is observed.
- Storage: Store the trimmer head in a clean, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
Here are some common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer line does not extend when bumped. | Line is tangled or jammed inside the spool; line is too short; spool is incorrectly assembled. | Stop the trimmer, remove the head, and manually untangle or re-spool the line. Ensure the line is long enough. Reassemble the spool correctly. |
| Line breaks frequently. | Incorrect line type/diameter; hitting hard objects; worn eyelets; line is old/brittle. | Use the recommended line type and diameter. Avoid hitting hard surfaces. Inspect and replace worn eyelets. Use fresh trimmer line. |
| Trimmer head vibrates excessively. | Head is not properly secured; damaged head; unbalanced line. | Ensure the head is tightly screwed onto the trimmer shaft. Inspect for damage and replace if necessary. Ensure line lengths are balanced. |
8. Specifications
| Feature | Detail |
|---|---|
| Product Type | Strimmer Head |
| Brand | LISM |
| Material | ABS + Aluminium alloy |
| Color | Orange |
| Thread Hole Size | M10 x 1.25 Left Rotation Way |
| Dimensions (L*W*H) | 15.0 x 15.0 x 4.0 cm (5.9 x 5.9 x 1.6 inches) |
| Net Weight | 500.0 g (17.6 oz) |
| Certification | CE |
| Max Operating RPM | 10,000 RPM |
9. User Tips
- Compatibility: This trimmer head has been noted by users to be suitable for various models, including those with Honda GX35 4-stroke engines, provided the thread size matches (M10 x 1.25 Left Rotation Way). Always verify your trimmer's specifications before purchase.
- Line Management: For optimal performance, ensure the trimmer line is evenly wound on the spool. Uneven winding can lead to feeding issues.
- Pre-cut Line: Some users find it helpful to pre-cut their trimmer line to the appropriate length before feeding it into the head, ensuring both sides are symmetrical.
10. Warranty and Support
For any questions, concerns, or support regarding your LISM Universal Bump Feed Line Trimmer Head, please contact the seller directly. Your satisfaction is important, and the seller is available to assist with product-related inquiries.
