Guide : How to replace and service the blade spindle/bearing

MAINTENANCE

How to replace and maintain
the blade bearing?

The blade bearing (hub with bearing) holds the blade and ensures smooth rotation by limiting vibration and friction. A worn bearing causes noise, play and uneven cuts. Here is when to replace it, how to change it and how to maintain it.

QUICK ANSWER

	Abnormal noise or play, uneven cuts: replace the bearing.
	Take the opportunity to check the blade and the fasteners.
	Choose a bearing compatible with your cutting deck.

WHEN TO REPLACE THE BEARING

SYMPTOMS

Metallic rumbling, vibration, axial or radial play, signs of overheating or seizing.

AFTER AN IMPACT

After hitting a stone or a stump, check the bearing and the blade immediately.

PREVENTIVE

When replacing a heavily worn blade or servicing the cutting deck.

TOOLS & PARTS

Wrenches and sockets

Suitable bits, an extension to reach the bearing bolts.

Compatible blade bearing

The replacement part suited to your deck.

Blade and fasteners

A new blade if bent or worn, replacement bolts if damaged.

Grease and a cloth

Grease if the bearing is greasable, a clean cloth for cleaning.

SEE OUR BLADE SUPPORTS →

REPLACING THE BEARING

CAUTION

Never work with the engine running: disconnect the ignition and the battery. Work on stable ground, with the machine chocked, and lock the blade with a wooden wedge before unscrewing.

1	Removing the blade Lock the blade with a wooden wedge, unscrew the centre bolt and remove the blade.
2	Removing the bearing Remove the belt if needed, then the bearing bolts and nuts. Replace the fasteners with new ones if they are damaged.
3	Cleaning Wipe the mounting surface and the inside of the deck: no remaining sand or grass.
4	Fitting the new bearing Position the new bearing and tighten the bolts in a cross pattern to the manufacturer's torque.
5	Refitting the blade Refit the blade the right way round, tighten to the recommended torque, then check the play and free rotation.
6	Test run Run it with no load for a few seconds, then check for any noise, leak or overheating.

MAINTAINING THE BEARING

	Periodically clean the underside of the deck (caked mud and grass).
	Grease only if a grease fitting is present: a small amount of grease as per the manual.
	Check play, noise and heat after 5 to 10 min of mowing. Replace if anything is abnormal.

PERSONAL PROTECTIVE EQUIPMENT (PPE)

GLOVES

Cut-resistant gloves when handling the blade.

GOGGLES

Safety goggles against flying dust and debris.

ENGINE OFF

Stable ground, machine chocked. Never work with the engine running.

FREQUENTLY ASKED QUESTIONS

Should I change the blade at the same time as the bearing?

If the blade is bent or worn, or if it has caused an imbalance, replace it. An unbalanced blade will wear out the new bearing again.

Do all bearings need greasing?

No. Some bearings are sealed and maintenance-free. Grease only if there is a grease fitting, and follow the manufacturer's manual.

NEED THE RIGHT BEARING?

A question about whether a bearing fits your cutting deck? Our advisers will guide you.

How to replace and maintainthe blade bearing?

NEED THE RIGHT BEARING?

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How to replace and maintain
the blade bearing?