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.
i05162309
Alternator and Fan Belts -
Inspect/Adjust
Inspection
To maximize the engine performance, inspect the belt
for wear and for cracking. Replace a belt that is worn
or damaged.
If a belt is too loose, vibration causes unnecessary
wear on the belt and pulleys. Loose belts may slip
enough to cause overheating.
To accurately check the belt tension, a suitable gauge
should be used.
Illustration 42
g03316638
Typical example
(1) Burroughs Gauge
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).
Adjustment
Illustration 43
g03316634
1.
Loosen bolts (1) and adjusting bolt (2). Loosen bolt
(4).
2.
Move the alternator (3) in order to increase or
decrease the belt tension.
3.
Tighten adjusting bolt (2). Tighten bolts (1) and
tighten bolt (4). Refer to the Specifications Manual
for the correct torque settings.
74
SEBU8609
Maintenance Recommendations
Alternator and Fan Belts - Inspect/Adjust