© Mitsubishi Forklift Trucks 2013. All
© Mitsubishi Forklift Trucks 2013. All rights reserved.rights reserved. Revision: BRevision: B
Document ID: 615023Document ID: 615023
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PBV20N2 PBV20N2 Service Service ManualManual
7.27.2 Battery maintenanceBattery maintenance
7.2.1 7.2.1 Daily Daily maintenancemaintenance
Charge the battery after every discharge.Charge the battery after every discharge.
For batteries with electrolyte circulation, check the electrolyte level towards the end For batteries with electrolyte circulation, check the electrolyte level towards the end ofof
the charging and, if necessary, top it the charging and, if necessary, top it up to the specified level with up to the specified level with purified waterpurified water
according to the manufacturer’s instructions. The electrolyte level must not fall belowaccording to the manufacturer’s instructions. The electrolyte level must not fall below
the anti-surge baffle, the top of the the anti-surge baffle, the top of the separator or the electrolyte minimum level mark.separator or the electrolyte minimum level mark.
For batteries with filling level sensors, check For batteries with filling level sensors, check the illuminated display daily. If the displaythe illuminated display daily. If the display
is green, the level is OK. If the display shows a blinking red colour, the filling level is toois green, the level is OK. If the display shows a blinking red colour, the filling level is too
low.low.
Check the electrolyte level visually by opening the standard vent plug or Check the electrolyte level visually by opening the standard vent plug or by the positionby the position
of the float indicator of of the float indicator of the water refilling plug and top it the water refilling plug and top it up with demineralised water atup with demineralised water at
the end of the charge.the end of the charge.
7.2.2 7.2.2 Weekly Weekly maintenancemaintenance
After rechargingAfter recharging, check the ba, check the battery visually for anttery visually for any signs of dirt or mey signs of dirt or mechanical damchanical damagesages
to the battery’s components. Pay special attention to the battery charging plugs andto the battery’s components. Pay special attention to the battery charging plugs and
cables. In special cases when charging with an IU cables. In special cases when charging with an IU characteristic curve, also ancharacteristic curve, also an
equalizing charge must be carried out.equalizing charge must be carried out.
7.2.3 7.2.3 Monthly Monthly maintenancemaintenance
At the end of At the end of the charge, switch the charge, switch the charger on the charger on and measuand measure and record re and record the voltages ofthe voltages of
all cells or bloc batteries.all cells or bloc batteries.
After the charginAfter the charging has beeg has been completedn completed, measure an, measure and record the eld record the electrolyte densiectrolyte density,ty,
electrolyte temperature and the filling level (when filling level sensors are used) of electrolyte temperature and the filling level (when filling level sensors are used) of allall
cells. If there are cells. If there are any significant changes compareany significant changes compared to earlier measurements ord to earlier measurements or
differences between the cells or bloc batteries, charge the battery fully and differences between the cells or bloc batteries, charge the battery fully and allow it toallow it to
rest for the minimum of two hours. If the problem persists, contact the batteryrest for the minimum of two hours. If the problem persists, contact the battery
manufacturer.manufacturer.
Before contacting the battery manufacturer, measure and record:Before contacting the battery manufacturer, measure and record:
•
•
Total voltageTotal voltage
•
•
Voltage per cellVoltage per cell
•
•
If the voltage readings are irregular, also check the If the voltage readings are irregular, also check the S.G. of each cellS.G. of each cell
7.2.4 7.2.4 Annual Annual maintenancemaintenance
In accordance with the standard EN 1175-1, the insulation resistance of the In accordance with the standard EN 1175-1, the insulation resistance of the truck andtruck and
the battery must be checked by the battery must be checked by an electrical specialist at least once per an electrical specialist at least once per year. The testsyear. The tests
on the battery’s insulation resistance must be conducted in accordance with theon the battery’s insulation resistance must be conducted in accordance with the
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