Service Manual

Batteries ISB, ISBe and QSB (Common Rail [...]
Page 13-18 Section 13 - Electrical Equipment - Group 13
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Batteries (013-007)
Initial Check
If conventional batteries are used, remove the cell caps or
covers, and check the electrolyte level.
NOTE: Maintenance-free batteries are sealed and do not
require the addition of water.
Fill each battery cell with distilled water. Refer to the
battery manufacturer's specifications.
Use the Fleetguard® refractometer, Part Number
CC-2800, to check the specific gravity of the battery
electrolyte.
Refer to the battery fluid column in the refractometer to
determine the state of charge of each battery cell.
If water has been added to a dry cell, recharge the battery
to mix the added water with the existing battery
electrolyte, to prevent incorrect readings.
CAUTION
Do not connect battery charging cables to any
electronic control system part. This can damage the
electronic control system parts.
Using a carbon-pile load (battery/alternator tester), test
the output amperage of maintenance-free or conventional
vent cap batteries.
If the output amperage is low, use a battery charger to
charge the battery. Refer to the manufacturer's
instructions.
Replace the battery if it will not charge to the
manufacturer's specifications or will not maintain a
charge.