Alternator Inspect
Perkins 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 in order 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 warm
because temperature affects the cranking
power.If the battery is too colt,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.
(1) Burroughs gauge.
Fit the gauge(1) at the center of the longest free
length and check the tension.The correct tension is
535N(120 lb).If the tension of the belt is below
250N(56 lb) adjust the belt to 535 N (120 lb).
If twin belts are installed,check and adjust the
tension on the both belts.
76
Alternator and Fan Belts
Inspect/Adjust/Replace
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
belt may slip enough to cause overheating.
To accurately check the belt tension ,a suitable
gauge should be used.
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