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SEBU8311-01 59 Maintenance Section Alternator - Inspect i02322311 Alternator - Inspect
Perkins recommends a scheduled inspection of the alternator. Inspect the alternator for loose connections and correct battery charging. Check the ammeter (if equipped) during engine operation in order to ensure correct battery performance and/or correct performance of the electrical system. Make repairs, as required. Check the alternator and the battery charger for correct operation. If the batteries are correctly 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. When the engine is not run for long periods of time or if the engine is run for short periods, the batteries may not fully charge. A battery with a low charge will freeze more easily than a battery with a full charge. i02665597 Alternator and Fan Belts - Inspect/Adjust
Inspection To maximize the engine performance, inspect the belts for wear and for cracking. Replace belts that are worn or damaged. For applications that require multiple drive belts, replace the belts in matched sets. Replacing only one belt of a matched set will cause the new belt to carry more load because the older belt is stretched. The additional load on the new belt could cause the new belt to break. If the belts are too loose, vibration causes unnecessary wear on the belts and pulleys. Loose belts may slip enough to cause overheating. To accurately check the belt tension, a suitable gauge should be used. g01003936 Illustration 31 Install the gauge (1) at the center of the belt between the alternator and the crankshaft pulley and check the belt tension. The correct tension for a new belt is 400 N (90 lb) to 489 N (110 lb). The correct tension for a used belt that has been in operation for 30 minutes or more at the rated speed is 267 N (60 lb) to 356 N (80 lb). If twin belts are installed, check and adjust the tension on both belts. Adjustment g01091158 Illustration 32 Typical example 1. Loosen mounting bolts (2) and adjusting bolt (1). |