How to Replace LG Washing Machine Rotor Assembly

Respect the magnets. These are neodymium and pull toward the stator with roughly 15-20 pounds of force. Keep metal tools clear so nothing snaps across and traps your fingers, and keep the rotor away from cards, phones and anything magnetic. Disconnect power and give it five minutes for the capacitor to discharge.

Getting it off#

Pull the machine away from the wall and remove the rear panel — ten to fourteen Phillips screws. The rotor is immediately visible: the outer ring with dark rectangular magnets around its inner face.

Brace the drum from the front and break the 14mm centre bolt counterclockwise. It has factory threadlocker on it and takes real force, so reach for a breaker bar rather than leaning harder on a ratchet.

Then grasp the rotor at opposite edges and pull straight back, rocking gently side to side as the magnets resist. Never angle it — that is how magnets crack on the way out.

What to look at while it is off#

Inspect the old rotor: cracked or chipped magnets around the inner ring, scoring on the inner bore where it fits the shaft, corrosion on the magnet faces.

Then the shaft. Look for scoring or rust, and wiggle it — any play means the bearing has failed, and fitting a new rotor will not fix that. Check the stator too, because a cracked magnet that has been contacting the windings leaves gouges, and a gouged stator needs replacing alongside the rotor.

Wipe the shaft clean of debris and old threadlocker residue.

Fitting the new one#

The rotor has a keyed bore or flat that matches the shaft, so it only goes on one way. Slide it home until it seats flush against the stator with an even gap all round.

Check that air gap at several points around the circumference by looking between the magnets and the stator windings. Anywhere they touch means it is not seated square — pull it off and reseat rather than bolting down a misalignment.

Put a small amount of blue threadlocker (Loctite 242) on the bolt threads, start it by hand so it cannot cross-thread, then torque to 35 ft-lbs. The threadlocker is not optional: without it the bolt works loose under the vibration of 1,400 RPM spin cycles and the rotor walks off the shaft.

Test it#

Refit the rear panel and run an empty Rinse and Spin. Listen for rubbing between rotor and stator. The spin should be smooth and quiet through every speed stage up to full RPM.

• Scraping after installation — the rotor is not centred. Take it off and refit it with the keyed section aligned, and check the stator mounting bolts are evenly torqued
• LE persists — if the old rotor cracked and damaged the stator, both parts need replacing. Look again at the windings for gouges
• Vibration afterwards — the centre bolt is under-torqued and allowing micro-movement

Shaft scoring means bearing failure and press tools. A rotor that will not seat flush means shaft damage or a deformed tub. Either way, book a repair.