Isuzu 4LE2 - Conversion of Specific Gravity; Inspecting the Battery Terminals; Inspecting the Specific Gravity of Battery Fluid

5-35
INSPECTION AND MAINTENANCE
Inspecting the Specific Gravity of Battery Fluid
Check the specific gravity of the battery fluid
using a hydrometer. When the specific gravity is
low, then charge the battery.
Specific gravity of fluid
(When the fluid temperature is 20°C (68°F))
1.270 - 1.290
Conversion of Specific Gravity
Measurement of specific gravity should be taken
based on the fluid temperature of 20°C (68°F).
Measure the fluid temperature, and when the
temperature is other than 20°C (68°F), the
specific gravity should be converted using the
following conversion formula.
Conversion formula
S
20
= St + 0.0007 (t - 20)
*: S
20
= Specific gravity at 20°C (68°F) (Standard
temperature), St = Measured specific gravity,
t = Fluid temperature at measurement
Inspecting the Battery Terminals
1. Check the terminal section for looseness
and corrosion.
2. When the terminal section is corroded
and coated with white powder, wash it off
with warm water and then wipe fully dry. If
corrosion is significant, polish it with a wire
brush or sand paper.
3. After cleaning is finished, apply a thin layer
of Besco grease to the terminal section, and
securely connect the battery cable so that it
will not be loosened.
Hydrometer Hydrometer
Terminal Terminal
IDE-6450A4500781ALL.indd5-35IDE-6450A4500781ALL.indd5-35 2014/04/1814:20:082014/04/1814:20:08