Toro Groundsmaster 5900 Series Service Manual page 406

Battery Inspection, Maintenance, and Testing (continued)
Battery Charging
Electrical System: Service and Repairs
G. If the test voltage is below the minimum voltage shown in the chart,
replace the battery. If the test voltage is at or above the minimum, return
the battery to service.
To minimize possible damage to the battery and to allow the battery to be fully
charged, the slow charging method is presented here. This charging method
can be accomplished with a constant current battery charger which is readily
available.
Follow the battery charger manufacturer's instructions when using
a battery charger.
1. Disconnect the battery cables from the battery being charged before charging
(see Battery Removal (page 6–140)
2. Determine the battery charge level from its open circuit voltage.
Battery Charge Level
100%
75%
50%
25%
0%
3. Determine the charging time and rate using the battery charger
manufacturer's instructions or the following table.
Battery
Reserve
75%
Capacity
(Minutes)
80 or less 3.8 hrs @ 3 amps
81 to 125 5.3 hrs @ 4 amps
126 to 170 5.5 hrs @ 5 amps
171 to 250 5.8 hrs @ 6 amps
above 250 6 hrs @ 10 amps
CAUTION
and Battery Installation (page
Specific Gravity
1.265
1.225
1.190
1.155
1.120
Battery Charge Level (Percent of Fully Charged)
50%
7.5 hrs @ 3 amps
10.5 hrs @ 4
amps
11 hrs @ 5 amps
11.5 hrs @ 6
amps
12 hrs @ 10
amps
Page 6–144
6–142)).
Open Circuit Voltage
12.68
12.45
12.24
12.06
11.89
25% 0%
11.3 hrs @ 3 15 hrs @ 3 amps
amps
15.8 hrs @ 4 21 hrs @ 4 amps
amps
16.5 hrs @ 5 22 hrs @ 5 amps
amps
17.3 hrs @ 6 23 hrs @ 6 amps
amps
18 hrs @ 10 24 hrs @ 10
amps amps
Groundsmaster ® 5900 & 5910
16227SL Rev B