GASKET 4N3989 - Caterpillar

Caterpillar recommends a scheduled inspection of the alternator. Inspect the alternator for loose connections and proper battery charging. Inspect the ammeter (if equipped) during engine operation to ensure proper battery performance and/or proper performance of the electrical system. Make repairs, as required.Check the alternator and the battery charger for proper operation. If the batteries are properly charged, the ammeter reading should be very near zero. All batteries should be kept charged. The batteries should be kept warm because temperature affects the cranking power. If the battery is too cold, the battery will not crank the engine. Batteries may not fully charge when the engine is not run for long periods of time or if the engine is run for short periods. A battery with a low charge will freeze more easily than a battery with a full charge.