Doosan DX60R Shop Manual page 418

Do not reverse the positive (+) and negative (-) ends of the
battery cable. The alternator diode and stator coil will be
damaged.
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 DOOSAN
dealer before using the equipment in such an environment
or the warranty is voided.
Do not use a high-pressure wash directly on the alternator.
Water will damage the alternator and result in inadequate
charging.
Engine
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CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
SP001693