0608ME All Maintenance Manual 37
© Jan. 2024
8 ELECTRICAL SYSTEM
Four 6 V lead-acid batteries in series connection are
used to supply power to the drive motor and reducer,
steering electric actuator and lift electric actuator to ena-
ble traveling, steering and platform lifting/lowering
movements.
The batteries are charged via an external power source.
A circuit breaker is used to protect the control system.
Proper maintenance of the electrical equipment is es-
sential for the proper and safe operation of the machine.
Continued operation of the machine with damaged or
corroded electrical components may lead to unsafe sit-
uations or severe injuries.
8.1 BATTERY
There are three types of batteries that may be used in
this machine: lead acid battery, lead acid maintenance-
free battery, and lithium battery. The latter two batteries
do not require maintenance.
Inspection
The battery condition will affect machine performance
and operation. The following checks should be per-
formed on the battery at specified intervals.
• Check the battery level. The battery should not be
discharged by more than 80% of its total capacity, it
should be charged immediately after each
discharge.
• Check the wiring harness retaining nuts between the
battery cells. Make sure that the retaining nuts are
tightened with the correct torque. Refer to the Tor-
que Specifications section for the tightening
torques.
• Inspect the battery wire harness connections. Make
sure that the battery harness connections are firmly
secured and are free from corrosion. Positive and
negative terminals must not be reversed.
NOTICE
Improper connection may result in reduced per-
formance and damaged terminals, melting, or
even fire.
• Check whether the inside and outside paint of the
battery box shows any damage. If any damage is
found, repair the paint immediately to protect the out-
er box insulation and to prevent corrosion.
• Check the battery compartment for accumulation of
water. Clean up any accumulated water immediately.
• Clean the area around the battery regularly. Regu-
larly clean the top of the battery, terminals, and con-
nection points with a mixture of baking soda and
water using a cloth or brush. After cleaning, promptly
dry with a cloth and apply a thin layer of Vaseline or
use terminal protectors. Do not allow the cleaning
solution to enter the battery's interior.
NOTICE
Adding terminal protectors and anti-corrosion
sealants will protect the battery terminals and ca-
bles from corrosion.
The instructions below are applicable only for batteries
requiring maintenance: Before conducting the inspec-
tion, fully charge the battery and let it sit for 24 hours, al-
lowing the battery cells to balance.
1. Wear protective clothing, protective gloves and pro-
tective glasses.
2. Remove the battery vent cover.
3. Top up the hydrometer and drain it two or three
times, then take a sample of the battery electrolyte.
4. Measure the specific gravity of all battery cells in se-
quence and note down the readings.
5. If the ambient temperature is above 27 °C (80 °F),
add 0.004 to the specific gravity reading for every in-
crease of 5 °C (40 °F). If the ambient temperature is
below 27 °C (80 °F), subtract 0.004 from the specific
gravity reading for every decrease of 5 °C (40 °F).
• Result 1: if the specific gravity reading of all bat-
tery cells is 1.250 or higher, and the reading dif-
ference between any two cells is less than 0.050
proceed with the next step.
• Result 2: if the specific gravity reading of one or
more battery cells is below 1.250, it indicates
that the battery is running low and needs charg-
ing. After charging, measure the specific gravity
reading; if it meets Result 1 proceed with the
next step.
• Result 3: If the specific gravity reading difference
between any two cells in the battery pack ex-
ceeds 0.050, equalize the battery pack and let it
sit for 6 hours before measuring the specific
gravity again. If the readings match Result 1 pro-
ceed to the next step.
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