Replacing an alternator 2cv and mehari

Replacing an alternator.

Disconnect the battery.

Remove the 4 fan cover screws.

Remove the 14mm bolt which secures the fan backing.

Tap down hard on the socket handle to help you loosen the nut.

With a hammer hit the socket wrench from above and below to loosen the fan backing.

Shake and pull the fan backing loose.


Remove the alternator drive belt cover.

Remove the alternator belt.

Remove the positive wire cover, undo and disconnect the wire.

Unplug the excitation wire.

Undo and remove the alternator bolts.

We suggest that you change your alternator belt.

Position the alternator belt.

Reposition your alternator and insert the fixing bolt.

Tighten the nut, but not fully.

Fit the tension bolt and tighten its nut by hand for the moment.

Replace the fan backing making sure that you fit the belt into the groove.

Put the 14mm bolt back into place.

To help tighten the bolt, insert a flat headed screwdriver at the head of the starter and block the fan backing from turning.

Check that the alternator belt is correctly in place.

You can regulate the tension of the alternator belt.

Pivot the alternator upwards to apply tension to the alternator belt, and tighten the tension bolt nut.

Now tighten the fixing bolt nut.

Check again the alternator belt’s tension.

Attention, an alternator belt which is too tight could damage the alternator bearings. The belt should be stretchable as seen.

Check the state of the female excitation wire connector.

Reconnect the positive connector to the alternator.

Tighten the nut and recover with its protection.

Replace the alternator drive belt cover.

Before fully tightening the belt covers nuts, make sure that it is correctly centered and does not touch the alternator belt.

Reinstall the fan grill.

Reconnect the battery.
Start up and check that there are no sounds of elements rubbing together.

All is installed. Drive safely.