Using circlip pliers, remove the retaining circlip from the gearwheel.

Remove the gearwheel from the axle. If you are unable to remove the gearwheel, use an extractor.

Don’t lose this little metal bar which links the gearwheel to the drive shaft.

It may fall off when the gearwheel is removed, or remain on the notch in the drive shaft.

Using a Phillips screwdriver, unscrew the two screws holding the wheel guard in place.

Remove the wheel guard.

Using a 5 mm Allen key, unscrew the 4 screws securing the axle protection.

To remove the shaft protector, insert a small flathead screwdriver between the motor block and the shaft protector.

Tap the screwdriver lightly to help it pass between the components. Repeat for each corner of the cover.

Once a gap has been created, do the same with a larger flathead screwdriver. Use the motor block as a lever to remove the cover.

The drive shaft can be extracted.

If the drive shaft is hard to pull out, unscrew the 4 screws holding the electric motor in place and lift it slightly to separate it from the shaft.

If necessary, you can remove the electric motor completely from the block.

Remove the axle.

Insert the new motor shaft, pushing it all the way into the motor. The bearing must be flush with the motor block.

Replace the plastic cover on the axle.

Make sure that one of the fixing holes for the sprocket cover is at the top left of the plastic cover.

Screw the guard back onto the motor unit.

Lightly tighten the screws on the bracket in turn, so as to insert the guard evenly and centrally.

Replace and secure the sprocket guard.

Replace the metal bar in the axle notch.

Replace the gearwheel on the motor shaft. Present it with the recess facing you.

Push the gear wheel as far as it will go towards the motor block so that you can see the circlip groove.

Replace the circlip on the axle.

You can now replace the electric motor if you had to remove it. You can then reinstall the motor unit on the gate.