Alternator - Inspect - Perkins 1103 Operation And Maintenance Manual

54
Refill Capacities

Alternator - Inspect

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.
Alternator and Fan Belts -
Inspect/Adjust/Replace
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 check accurately the belt tension, a suitable gauge
should be used.
i02322311
Illustration 29
Typical example
(1) Burroughs Gauge
Fit the gauge (1) at the center of the longest free
length and check the tension. The correct tension is
535 N (120 lb). If the tension of the belt is below
250 N (56 lb), adjust the belt to 535 N (120 lb).
If twin belts are installed, check and adjust the
i05899714 tension on both belts.
Adjustment
Illustration 30
1. Loosen the alternator pivot bolt (2).
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