Often times, in order to make a repair, you will have to remove the alternator. When it comes time to install the alternator, you may find it is a very tight fit. Many alternators have a part that slides in order to fit snugly when installed. To reverse this process, and to make the installation of the alternator much easier, all you need is two nuts and a bolt.
Put the bolt and nuts in place as shown, and then slowly twist the two nuts away from each other. The device will push the slider out, and make the installation a piece of cake. My only word of caution is to work slowly, and add a bit of lubricant. The alternator’s case is aluminum, and is therefore fairly fragile. If you proceed with too much gusto, you can break the alternator’s case.
good luck, and happy motoring.