How to replace a grass trimmer head

Ensure the trimmer is turned off. For petrol trimmers, remove the spark plug, and for battery-operated trimmers, detach the battery. For electric trimmers, disconnect the cable. This step prevents accidental activation during maintenance.

Please check that the correct deflector approved for the blade and trimmer is fitted.

A lock pin or Allen key is required to lock the shaft in place. Insert it into the gearbox hole, then turn the shaft until it locks, allowing you to remove or tighten the trimmer head.

The frequency of replacement depends on usage and wear. The condition of the cutting tool is important for the smooth operation of your grass trimmer, so you should check it regularly as part of your maintenance routine.

Depending on the intensity of use and the environmental conditions (e.g. when cutting thicker grass or weeds), wear and tear may increase, which may require more frequent replacement. Regular maintenance will help you to keep an eye on the condition of the trimmer head components and ensure efficient and safe use of the appliance.

Switch the trimmer off. If using a petrol tool, remove the spark plug. If using a battery trimmer, remove the battery or disconnect the connecting cable.

Please check that the correct deflector approved for the wire and trimmer is fitted. Hold the grass trimmer in such a way that the wire spool faces upwards.

Insert a lock pin or Allen key into the hole in the gearbox. Turn the shaft until the lock pin clicks into place and the shaft is locked.

Turn the grass trimmer head clockwise to loosen and remove it.

Turn the new wire head anti-clockwise until it latches onto the shaft.

Tighten the wire head while the shaft is locked. Now remove the tool that is locking the shaft.

Switch the trimmer or brush cutter off. If using a petrol tool, remove the spark plug. If using a battery trimmer, remove the battery or disconnect the connecting cable.

Please check that the correct deflector approved for the blade and trimmer is fitted. Hold the grass trimmer upside down.

Insert a lock pin or Allen key into the hole in the gearbox. Turn the shaft until the lock pin clicks into place and the shaft is locked.

Turn the nuts clockwise to loosen them. Then pull the blade and fastening components from the gearbox without removing the thrust plate. You can now replace it with a new one.

Fit the replacement part onto the thrust plate; the thrust plate collar must fit into the bore of the metal cutting tool.

Fit the thrust washer and rider plate onto the shaft.

Tighten the nut by turning anti-clockwise using a combination socket tool. Replace any nuts with stripped threads. Now remove the tool that is locking the shaft.