16
Battery Testing – 8 Volt
BATTERIES
CAUTION
• Do not allow battery acid from battery caps or hydrometer to drip onto the front or rear body of the
vehicle. Battery acid will cause permanent damage. Wash immediately.
2.
Remove the vent cap. Using a battery thermometer (CCI P/N 1011767), record electrolyte temperature of the
no. 2 cell.
3.
Squeeze the rubber bulb of the hydrometer and insert into the cell. Slowly release the bulb, drawing electrolyte
up into the glass tube of the hydrometer.
4.
When the float rises off the bottom, adjust the electrolyte level so that the float rides free of the bottom but does
not strike the top of the glass tube. Remove the hydrometer from the cell and release the pressure from the bulb.
5.
Hold the hydrometer vertically, ensuring that the float is not touching the sides of the barrel. Hold the hydrometer
at eye level and read the scale at the level of electrolyte
(Figure 16-4, Page 16-10)
.
6.
Record the reading and return the electrolyte to the cell from which it was taken. Replace vent cap.
7.
Repeat steps 2 through 6 on all cells.
Hydrometer Calibration
Most hydrometers are calibrated to read correctly at 80 °F (26.7 °C). The readings obtained as described above must
be corrected for temperature. For each 10 °F (5.6 °C) above 80 °F (26.7 °C), add 0.004 to the reading. For each 10 °F
(5.6 °C) below 80 °F (26.7 °C), subtract 0.004 from the reading.
4 0
2 0
6 0
8 0
13 00
1.250
1.280
View at eye level.
717
Figure 16-4
Hydrometer Test
Page 16-10
2009 Electric Precedent Maintenance and Service Manual
