Toro Groundsmaster 3280-D Service Manual page 313

Charging the Battery
Groundsmaster ® 3280-D/3320
05138SL Rev B
To minimize damage to the battery and allow the battery to charge fully, do the
following slow charging procedure. You can do this charging procedure with a
constant current battery charger that is locally available.
Follow the manufacturer's instructions when using a battery charger.
Note: Use specific gravity of the battery cells is the most accurate procedure
of determining the battery condition.
1. Determine the battery charge level from either its specific gravity or open
circuit voltage.
Battery Charge Level
100%
75%
50%
25%
0%
2. Determine the charging time and rate using the manufacturer's battery
charger instructions or the following
Battery Charge Level Table
Battery
Reserve
75%
Capacity
(Minutes)
80 or less 3.8 hrs
81 to 125 5.3 hrs
126 to 170 5.5 hrs
171 to 250 5.8 hrs
above 250 6 hrs
10 A
IMPORTANT
Specific Gravity
1.265
1.225
1.190
1.155
1.120
Battery Charge Level Table (page
Battery Charge Level (Percent of Fully Charged)
50%
7.5 hrs
@ @
3 A 3 A
10.5 hrs
@ @
4 A 4 A
11 hrs
@ @
5 A 5 A
11.5 hrs
@ @
6 A 6 A
12 hrs
@ @
10 A
Page 6–85
Open Circuit Voltage
12.68
12.45
12.24
12.06
11.89
25% 0%
11.3 hrs 15 hrs
@ @
3 A 3 A
15.8 hrs 21 hrs
@ @
4 A 4 A
16.5 hrs 22 hrs
@ @
5 A 5 A
17.3 hrs 23 hrs
@ @
6 A 6 A
18 hrs 24 hrs
@ @
10 A 10 A
Electrical System: Service and Repairs
6–85).