Tennant 6100E, Service Manual

Page: 147 / 228

ELECTRICAL
4--5
6100E 330255 (9--00)
Measuring the specific gravity, using a
hydrometer, is a way to determine the charge
level and condition of the batteries. If one or more
of the battery cells test lower than the other
battery cells (0.050 or more), the cell is damaged,
shorted, or is about to fail.
NOTE: Do not take readings immediately after
adding distilled water. If the water and acid are not
thoroughly mixed, the readings may not be
accurate. Check the hydrometer readings against
the following chart to determine the remaining
battery charge level:
Spec. Gravity at 27
°
C (80
°
F)
Charge Level 220 AH Battery
100 % 1.265
75 % 1.223
50 % 1.185
25 % 1.148
Discharged 1.110
NOTE: If the readings are taken when the battery
electrolyte is any temperature other than shown,
the reading must be temperature corrected. Add
or subtract to the specific gravity reading 0.004,
4 points, for each 6
_
C (10
_
F) above or below
25
_
C (77
_
F).
TO CHARGE BATTERIES
1. Drive the machine to a flat, dry surface in a
well-ventilated area.
2. Stop the machine, set the parking brake and
turn the machine power off.
FOR SAFETY: Before leaving or
servicing machine, stop on level
surface, set parking brake, turn off
machine, and remove key.
3. Open the seat support.
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