Doosan DX60R Shop Manual page 207

When the battery indicator goes out, it should not come on
again. The battery indicator only comes on during operation
if the alternator fails or if the V-belt breaks. However, if an
LED is used in the battery indicator, the LED will shine
faintly during normal operation.
Using a non-specified V-belt will cause inadequate charging
and shorten the belt life. Use the specified belt.
Agricultural or other chemicals, especially those with a high
sulfur content, can adhere to the IC regulator. This will
corrode the conductor and result in battery over-charging
(boiling) and charging malfunctions. Consult authorized
DOOSAN dealer or distributor before using the equipment
in such an environment or the warranty is voided.
Make sure that the combined total resistance of the battery
cable in both directions between the starter motor and the
battery is within the value indicated on the wiring diagram.
The starter motor will malfunction or break down if the
resistance is higher than the specified value.
The starter motor is water-proofed according to JIS D 0203,
R2 which protects the motor from rain or general cleaning.
Do not use high-pressure wash or submerse the starter
motor in water.
Use a specialized battery charger to recharge a battery with
a voltage of 8 volts or less. Booster starting a battery with a
voltage of 8 volts or less will generate an abnormally high
voltage and destroy electrical equipment.
Engine
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
SP001693
Page 27