Isuzu AU-4LE1T, Руководство по обслуживанию

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Gravity conversion
The specified electrolyte temperature for the gravity measurement is
20°C (68°F).
Measure the electrolyte temperature and do the conversion in
accordance with the following formula when the temperature does not
fall to the specified temperature.
S
20
= St + 0.0007 (t – 20)
S
20
; gravity at 20°C
St ; gravity measured
t ; electrolyte temperature when measured
Battery terminal connections
Periodically, check the battery terminals for loose connection and
corrosion.
For the check interval, follow the machine manufacturer’s standard.
Loose connection will cause hard engine starting or deficient battery
charging.
If the terminals are excessively corroded, disconnect the battery cables
and polish them with a wire brush or sandpaper.
Never reverse the "+" and "–" terminals when reconnecting the cables.
Even a short period of reverse connection could damage the electrical
parts.
Cleaning of Battery
When the battery is fouled clean it with clean water or tepid water and
wipe them with a dry cloth to remove the water.
Apply a light coat of vaseline or a grease to the battery post.