Toro Groundsmaster 4500-D Series Service Manual page 356

Battery Charging
Electrical System: Service and Repairs
To minimize possible damage to the battery and 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 manufacturer's instructions when using a battery charger.
Note: Using specific gravity of the battery electrolyte is the most accurate
method of determining battery condition.
1. Determine the battery charge level from either its open circuit voltage or
electrolyte specific gravity (if electrolyte is accessible).
Battery Charge Level
100%
75%
50%
25%
0%
2. Determine the charging time and rate using the battery charger
manufacturer's instructions or the following table.
Battery
Reserve
Capacity
75%
(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
Do not charge a frozen battery because it can explode and cause
injury. Let the battery warm to 16ºC (60ºF) before connecting to
a charger.
Charge the battery in a well−ventilated place to dissipate gases
produced from charging. These gases are explosive; keep open
flame and electrical spark away from the battery. Do not smoke.
Nausea may result if the gases are inhaled. Unplug the charger from
the electrical outlet before connecting or disconnecting the charger
leads from the battery posts.
CAUTION
Open Circuit Voltage
12.6
12.4
12.2
12.0
11.8
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
CAUTION
Page 6–74
Specific Gravity
1.265
1.225
1.190
1.155
1.120
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 ® 4500-D/4700-D
19245SL Rev A