Introducció
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Arnold 42-inch Mulching Blade Set. Please read these instructions thoroughly before attempting any installation or maintenance procedures. Proper use and care will ensure optimal performance and longevity of your blades.
Informació de seguretat
Prioritzeu sempre la seguretat quan treballeu amb fulles de tallagespa. Si no seguiu aquestes pautes de seguretat, podeu patir lesions greus.
- Desconnecteu la bugia: Before performing any work on the mower deck or blades, always disconnect the spark plug wire to prevent accidental engine starting.
- Utilitzeu equip de protecció: Always wear heavy-duty gloves and eye protection when handling blades. Blades are sharp and can cause cuts.
- Assegureu la segadora: Ensure the lawn mower is on a flat, stable surface and cannot roll or tip over during blade replacement. Use jack stands if lifting the mower.
- Refredament del motor: Allow the engine and muffler to cool completely before working on the mower to avoid burns.
- Parell adequat: Ensure all fasteners are tightened to the manufacturer's specified torque to prevent blades from loosening during operation.
Compatibilitat
This Arnold 42-inch Mulching Blade Set (Model 490-110-M115) is designed for use with 42-inch lawn and garden tractors manufactured in 1997 and after. It is compatible with various brands, including:
- MTD
- Troy-Bilt
- Yard-Man
- Huskee
- Yard Machines
- Bolens
These blades feature a star center hole design. They replace Original Equipment (O.E.) part numbers 942-0616, 942-0616A, 742-0616, and 742-0616A.
Contingut del paquet
Your Arnold 42-inch Mulching Blade Set package includes:
- Two (2) 42-inch Mulching Blades

Image: The Arnold 42-inch Mulching Blade Set, showing two black blades with star-shaped center holes, standing vertically.
Instal·lació
Eines necessàries
- Guants de treball resistents
- Ulleres de seguretat
- Joc de claus o tubs de mida adequada per als cargols de la fulla
- Clau dinamométrica
- Eina d'extracció de blocs de fusta o fulles
Step-by-Step Blade Replacement
- Prepareu la segadora: Park the lawn mower on a flat, level surface. Turn off the engine, engage the parking brake, and remove the ignition key. Disconnect the spark plug wire to prevent accidental starting.
- Accés a les fulles: Depending on your mower model, you may need to raise the front of the mower or remove the mower deck. Refer to your mower's owner's manual for specific instructions on accessing the blades.
- Assegureu la fulla: Col·loqueu un bloc de fusta entre la fulla i la plataforma de la tallagespa per evitar que la fulla giri mentre afluixeu el cargol.
- Treure les fulles velles: Using a wrench or socket, loosen and remove the blade bolt. Note the orientation of the old blade before removal. Blades typically have a cutting edge that faces towards the ground.
- Inspeccionar components: Examine the blade spindle and mounting hardware for any damage or wear. Replace any worn components as necessary.
- Instal·leu les noves fulles: Position the new Arnold mulching blade onto the spindle, ensuring the cutting edge faces the ground. The star-shaped center hole should align perfectly with the spindle.

Image: A pair of Arnold 42-inch mulching blades laid flat, highlighting the star-shaped center hole for proper spindle alignment.
- Estrenyeu els cargols de la fulla: Reinstall the blade bolt and washer. Use a torque wrench to tighten the bolt to the torque specification provided in your mower's owner's manual. Typically, this is between 70-90 ft-lbs (95-122 Nm). Overtightening or undertightening can be dangerous.
- Reassemble Mower: Reattach the mower deck (if removed) and lower the mower. Reconnect the spark plug wire.
- Prova de funcionament: Before mowing, start the engine and listen for any unusual noises or vibrations. If any issues are detected, immediately shut off the engine and re-inspect the blade installation.
Instruccions de funcionament
These 3-in-1 blades are designed for mulching, bagging, and side discharge operations. The specific method of operation depends on your mower's configuration and accessories.
- Mulching: When mulching, the blades are designed to cut grass into fine clippings that are then recirculated back into the lawn as natural fertilizer. Ensure your mower's mulching plug or baffle is correctly installed.
- Ensacat: For bagging operations, attach the grass collection bag to your mower. The blades will create airflow to direct clippings into the bag.
- Descàrrega lateral: If your mower is set up for side discharge, the blades will propel clippings out of the side chute.
Always operate your mower according to its owner's manual. Avoid mowing wet grass, as it can clog the deck and reduce cutting performance.
Manteniment
Regular maintenance of your blades ensures optimal cutting performance and safety.
- Fulles netes: Després de cada ús, netegeu els retalls d'herba i les restes de les fulles i la part inferior de la plataforma de la segadora. Això evita l'oxidació i manté l'equilibri.
- Inspeccionar per danys: Regularly inspect blades for bends, cracks, or excessive wear. Damaged blades should be replaced immediately.
- Afilat: Blades should be sharpened periodically to maintain a clean cut. If sharpening, ensure the blade remains balanced. An unbalanced blade can cause excessive vibration and damage to the mower. If you are unsure how to sharpen blades correctly, consult a professional.
- Emmagatzematge: When storing the mower for extended periods, ensure blades are clean, dry, and lightly oiled to prevent rust.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Tall desigual | Dull or bent blades; uneven tire pressure; mower deck not level. | Sharpen or replace blades; check and adjust tire pressure; level mower deck. |
| Vibració excessiva | Unbalanced or bent blades; loose blade bolts; debris on blades/spindle. | Inspect and balance/replace blades; tighten blade bolts to specification; clean blades and spindle. |
| Poor mulching/bagging | Dull blades; mowing wet or excessively tall grass; clogged deck. | Sharpen blades; mow dry grass at appropriate height; clean mower deck. |
Especificacions
- Dimensions del producte: 23 x 5 x 5 polzades
- Pes de l'article: 4 lliures
- Número de model: 490-110-M115
- Tipus de fulla: 3-in-1 Mulching Blade
- Center Hole: Star-shaped
- Quantitat: 2 fulles per joc
Garantia i Suport
For specific warranty information or technical support regarding your Arnold Mulching Blade Set, please refer to the Arnold Corporation's official weblloc web o poseu-vos en contacte amb el servei d'atenció al client. Conserveu el rebut de compra per a reclamacions de garantia.
Advertència de la proposta 65
ADVERTIMENT: Aquest producte us pot exposar a substàncies químiques, com ara el plom, que l'estat de Califòrnia sap que causa càncer i defectes de naixement o altres danys reproductius. Per a més informació aneu a www.P65Warnings.ca.gov.





