Isuzu AU-4LE1T, Maintenance Manual

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5. ENGINE STARTING
In cold engine starting at atmospheric temperature of below 0°C (32°F), pay
attention to the following items:
1) Do the preheating operation before cranking the engine with the
starter.
2) Set the engine throttle lever or pedal to the 1/3 position of the full lever
or pedal stroke.
3) If the engine does not start with the initial cranking, keep the batteries
stationary a while to recover their power and, reattempt the preheating
and the cranking operation.
4) In order to protect the starter, one time cranking must be limited to
within 10 seconds.
5) In cranking operation, when a phenomenon, that the starter pinion and
the flywheel ring gear engagement to repeated disengage and engage
take place, as this is a sign of weakened battery power, charge the
batteries with an external electrical source.
6) In an extreme cold temperature engine starting, do the engine cranking
a while with setting the throttle lever at no fuel position to allow the
engine rotating or traveling parts come to an unrestricted condition
from the adhesive cold lubricant, after then do preheating and cranking
to start the engine.
CAUTION:
Do not use starting "aids" in the air intake system. Such aids
can cause immediate engine damage.