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74
Maintenance Section
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 -
Replace
Refer to Disassembly and Assembly Manual , "
Alternator Belt - Remove and Install".
Battery - Replace
Batteries give off combustible gases which can
explode. A spark can cause the combustible
gases to ignite. This can result in severe personal
injury or death.
Ensure proper ventilation for batteries that are in
an enclosure. Follow the proper procedures in or-
der to help prevent electrical arcs and/or sparks
near batteries. Do not smoke when batteries are
serviced.
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The battery cables or the batteries should not be
removed with the battery cover in place. The bat-
tery cover should be removed before any servic-
ing is attempted.
Removing the battery cables or the batteries with
the cover in place may cause a battery explosion
resulting in personal injury.
1. Switch the engine to the OFF position. Remove all
electrical loads.
Note: After the engine has stopped, allow 2 minutes
for the storing of information from the engine to the
ECM before disconnecting the power.
2. Turn off any battery chargers. Disconnect any
battery chargers.
3. Ensure that the battery disconnect switch is in the
OFF position.
4. Disconnect the NEGATIVE "-" cable from the
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NEGATIVE "-" battery terminal.
5. Disconnect the POSITIVE "+" cable from the
POSITIVE "+" battery terminal.
Note: Always recycle a battery. Never discard a
battery. Dispose of used batteries to an appropriate
recycling facility.
6. Remove the used battery.
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7. Install the new battery.
Note: Before the cables are connected, ensure that
the battery disconnect switch is in the OFF position.
8. Connect the POSITIVE "+" cable to the POSITIVE
"+" battery terminal.
9. Connect the NEGATIVE "-" cable to the
NEGATIVE "-" battery terminal.
10. Turn the battery disconnect switch to the ON
position.
Battery Electrolyte Level -
Check
When the engine is not run for long periods of time or
when the engine is run for short periods, the batteries
may not fully recharge. Ensure a full charge in order
to help prevent the battery from freezing. If batteries
are correctly charged, the ammeter reading should
be very near zero, when the engine is in operation.
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