1. Product Overview
This perfektGarten 51 cm mulching lawnmower blade is engineered for efficient grass cutting, collection, and mulching. It features a versatile 3-in-1 function: discharge, collection, and mulching, providing flexibility for various lawn care needs. The blade is crafted from high-quality certified carbon steel, ensuring durability and consistent performance. Each blade undergoes precise sharpening, bending, and balancing, and is heat-treated (hardened and tempered to 45 HRC) for extended longevity and resistance to deformation.
Image 1: Overview of the perfektGarten 51 cm mulching lawnmower blade, showcasing its robust design and sharp edges.
2. Safety Information
Always prioritize safety when handling and installing lawnmower blades. Failure to follow these instructions can result in serious injury.
- Disconnect Power: Before any installation or maintenance, ensure the lawnmower's engine is off and the spark plug wire is disconnected to prevent accidental starting. For electric mowers, unplug from the power source.
- Wear Protective Gear: Always wear heavy-duty gloves to protect your hands from sharp blade edges. Safety glasses are also recommended to protect your eyes from debris.
- Stable Work Area: Work on a flat, stable surface. Secure the lawnmower to prevent it from tipping over during blade removal or installation.
- Handle with Care: Blades are extremely sharp. Handle them carefully to avoid cuts.
- Proper Disposal: Dispose of old blades responsibly and safely.
3. Setup and Installation
This section outlines the steps for safely replacing your lawnmower blade.
3.1 Pre-Installation Checks
- Ensure the lawnmower is turned off and the spark plug wire is disconnected (for gasoline mowers) or unplugged (for electric mowers).
- Tilt the lawnmower onto its side, ensuring the carburetor and air filter are facing upwards to prevent fuel or oil leakage.
- Clean any grass clippings or debris from the underside of the mower deck.
3.2 Removing the Old Blade
- Using a block of wood or a specialized blade removal tool, secure the old blade to prevent it from turning.
- Using a wrench, loosen and remove the blade bolt(s) by turning counter-clockwise. Note the orientation of any washers or spacers.
- Carefully remove the old blade.
3.3 Installing the New Blade
- Position the new perfektGarten blade onto the blade adapter. Ensure the cutting edges are facing the correct direction (usually upwards towards the mower deck). The blade's curved ends should point towards the mower deck.
- Reinstall any washers or spacers in their original orientation.
- Insert the blade bolt(s) and tighten them by turning clockwise.
- Secure the blade with a block of wood or blade tool and tighten the bolt(s) to the manufacturer's specified torque (refer to your lawnmower's manual for exact torque specifications, typically between 40-60 ft-lbs or 54-81 Nm). Over-tightening or under-tightening can be dangerous.
- Once installed, ensure the blade spins freely without obstruction and is properly seated.
Image 2: A close-up view of the blade, illustrating the central mounting hole and the wing-like design for mulching and collection.
4. Operating the Blade
Once correctly installed on a compatible AL-KO lawnmower, the perfektGarten 51 cm blade will perform its 3-in-1 functions: cutting, mulching, and collecting grass clippings. Always operate your lawnmower according to its specific instruction manual, observing all safety precautions.
5. Maintenance
Regular maintenance ensures optimal performance and extends the life of your blade.
- Inspection: Before each use, inspect the blade for any signs of damage, cracks, bends, or excessive wear. Replace the blade immediately if any damage is found.
- Cleaning: After each use, clean grass clippings and debris from the blade and the underside of the mower deck. This prevents buildup that can affect cutting performance and balance.
- Sharpening: While this blade is designed for durability, regular sharpening (if needed) can maintain cutting efficiency. If sharpening, ensure the blade remains balanced to prevent excessive vibration. It is recommended to have blades professionally sharpened or replaced if you are unsure.
- Balancing: An unbalanced blade can cause excessive vibration, leading to poor cut quality and potential damage to the lawnmower. If you sharpen the blade, check its balance using a blade balancer.
- Storage: Store the blade in a dry place to prevent rust. If storing for an extended period, consider applying a light coat of oil to protect the metal.
6. Troubleshooting
This section addresses common issues related to blade performance.
- Poor Cut Quality / Uneven Cut:
- Check if the blade is installed correctly and securely.
- Inspect the blade for dullness or damage. Sharpen or replace if necessary.
- Excessive Vibration:
- Ensure the blade bolt(s) are tightened to the correct torque.
- Check if the blade is bent or unbalanced. Replace if bent; rebalance if unbalanced.
- Remove any grass buildup or debris from the blade and blade adapter that might be causing imbalance.
- Blade Not Spinning:
- Ensure there are no obstructions preventing the blade from rotating.
- Verify the blade is correctly mounted on the blade adapter.
7. Specifications
Detailed technical specifications for the perfektGarten 51 cm Lawnmower Blade.
| Product Name | perfektGarten 51 cm 3-in-1 Mulching Lawnmower Blade |
| Model Number | 114 |
| Length (L) | 510 mm |
| Center Hole Diameter (ZB) | 19.5 mm |
| Width (B) | 57 mm |
| Thickness | 4 mm |
| Material | Certified High-Quality Carbon Steel, Heat-Treated (45 HRC) |
| Functions | 3-in-1: Discharge, Collection, Mulching |
7.1 Compatibility
This blade is compatible with various AL-KO (ALKO) lawnmower models, including but not limited to:
- AL-KO 51 BR-A Comfort (119384)
- AL-KO 51.3 SP Edition (119477)
- AL-KO 52 BR-A Bauhaus Edition (119508)
- AL-KO 524 SP A Silver Premium (119574)
- AL-KO CLASSIC 5.15 SP-B PLUS (119613)
- AL-KO 51.5 SP-A Highline - PRO 140 (119618)
- AL-KO 51.4 SP Edition Highline (119631)
- AL-KO 525 SP-A Highline PRO 160 4IN1 (119668)
- AL-KO BH 51 SP-BE Highline (119700)
- AL-KO GT 5.15 RH (119704)
- AL-KO HB 510 BAV-I (119708)
- AL-KO Classic 5.16 VS-B PLUS 4IN1 (119709)
- AL-KO 520 BR-A Silver Premium (119714)
- AL-KO 51.6 SP-H Highline (119739)
- AL-KO 51.6 SP-B PLUS Highline (119741)
- AL-KO Classic 5.16 SP-A PLUS PRO 140 (119744)
- AL-KO 526 VS-XI Highline (119747)
- AL-KO 51.6 SPR-A PLUS Gudenaa (119752)
- AL-KO 5.16 P-B Classic (119764)
- AL-KO Highline 527 SP (119769)
- AL-KO Highline 527 VS (119770)
- AL-KO 527 BR-H Silver Premium (119771)
- AL-KO Classic 5.17 SP-B PLUS 4IN1 (119792)
- AL-KO 51.7 SP-H Highline (119801)
- AL-KO 527 VS-H Highline (119802)
- AL-KO 51.7 SP-A Highline (119812)
- AL-KO 5.17 SP-A PLUS Classic (119820)
- AL-KO 510 BRE (119827)
- AL-KO GT 5.17 RH (119830)
- AL-KO 5.18 SP-A PLUS Classic (119837)
- AL-KO 51.8 SP-A Highline (119843)
- AL-KO 528 VSI Highline (119845)
- AL-KO Classic 5.18 SP-B PLUS 4IN1 (119867)
- AL-KO Classic 5.18 VS-B PLUS 4IN1 (119868)
- AL-KO 5.18 P-A PLUS Classic (119869)
- AL-KO 5.18 SP-A PLUS Gudenaa (119870)
- AL-KO 5.18 SPE-A PLUS Gudenaa (119871)
- AL-KO 5.18 SP-I Primaster (119873)
- AL-KO GT 5.18 RH (119880)
- AL-KO 5.18 P-B Classic (119882)
- AL-KO 51.9 SP-H Highline (119884)
- AL-KO 51.5 SPI Edition (119896)
- AL-KO 51.0 P-A Comfort (119941)
- AL-KO 51.0 SP-B Comfort (119942)
- AL-KO 51.0 SP-A Comfort (119944)
- AL-KO 520 VSI-B Premium (119948)
- AL-KO 520 VS-B Premium (119949)
- AL-KO 52 XLR-B Steelline Quattro (119960)
- AL-KO 520 SP-B Premium (119967)
- AL-KO 520 SP-H Premium (119969)
- AL-KO 520 SP-B Premium PLUS (119975)
- AL-KO 5235 SP-B SOLO (127220)
- AL-KO 5257 VS SOLO (127394)
- AL-KO 5238 SP-a SOLO (127458)
- AL-KO 5278 VS SOLO (127459)
- AL-KO SOLO 5219 SP-A (127540)
- AL-KO 5251 VS-B SOLO (127607)
- AL-KO 521 VS-H Premium (119994)
7.2 Replaces Part Numbers
This blade is a suitable replacement for the following original part numbers:
- 440126
- 479143
- 118995
- 113058
Image 3: Dimensional diagram of the lawnmower blade, indicating key measurements such as length (L), center bore (ZB), and width (B).
8. Warranty and Support
For warranty information or technical support regarding your perfektGarten lawnmower blade, please refer to the documentation provided with your purchase or contact the seller directly. Specific warranty terms and conditions may vary.
