Yanmar 3TNV Series Service Manual page 46

(b) Measurement with hydrometer
When using a hydrometer, the measured
specific gravity must be corrected according to
the temperature at the time of measurement.
The specific gravity of battery electrolyte is
defined with 20 as the standard. Since the
specific gravity increases or decreases by
0.0007 when the temperature varies by 1 ,
correct the value according to the equation
below.
(c) Specific gravity and remaining battery charge
Specific Discharged
gravity quantity
of electricity
(20 )
1.28
1.26
1.24
1.23
(3) Terminals
Clean if corroded or soiled.
(4) Mounting bracket
Repair or replace it if corroded.
Retighten if loosened.
(5) Battery appearance
Replace the battery if cracked or deformed.
Clean with fresh water if contaminated.
Remaining
charge
(%) (%)
0 100
10 90
20 80
25 75
31
2. Inspection and Adjustment