Operation and maintenance manual

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.
i05341153
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 check accurately the belt tension, a suitable gauge
should be used.
Illustration 24 g03383147
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).
If twin belts are installed, check and adjust the
tension on both belts.
Adjustment
Illustration 25 g03383151
Illustration 26 g03383155
1. Loosen adjusting bolt (1) and mounting bolt and
nut (2). Loosen bolt (3).
SEBU9064
55
Maintenance Recommendations
Alternator and Fan Belts - Inspect/Adjust