Edition 2 Chapter 1 Page 1-51
Feb/2013 Maintenance and Service
E. Do an equalizing charge procedure if one of the items that follows occurs:
• Monthly, when the crane operates in usual conditions.
• When the battery charge interval is too long or unusually high loss of power
in the battery.
• The battery voltage is too low or it fails to charge.
• If you find a battery cell with a voltage level of < 1 volt or three cells that are
< 1.5 volts.
(1) Equalizing charge procedure:
(a) When the battery has a usual charge do not move it for one hour.
(b) Charge the battery (at 10 amp setting) until the battery electrolyte
starts to bubble. Do not move it for one hour.
(c) Do step 2 again until the electrolyte starts to bubble. Make sure that
the level of electrolyte and the voltage are at the correct level.
F. If you do not operate the crane for a long time, remove the battery from the crane
and charge it. Do a usual charge two times each month. Do a full discharge
and charge four times each year.
G. Examine the batteries and the area around the batteries as follows:
• Make sure that the terminal connections are tight.
• Remove dirt and corrosion from the wires and terminals.
1.20 BATTERY MAINTENANCE – WINTER
When you operate the crane in cold conditions, you use more electricity more than in
other season. Battery maintenance before winter is very important for the battery and
crane operation.
A. Make sure that the acid level is between 0.4 and 0.6 in (10 and 15 mm) above
the top edge of the battery plates. If necessary, add distilled water.
B. Adjust the electrolyte ratio (acid to distilled water) determined by the area and
time of year.
C. Make sure that you install the fluid air plugs correctly. The vent holes must be
clean, dry and have no blockage.
D. Make sure that the battery terminals are clean (corrosion free), dry and
connected correctly and tight. Add a small quantity of Vaseline to prevent
corrosion.
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