Toro Groundsmaster 7200 Service Manual page 175

7. Connect negative (- ) cable connector to the nega-
tive (- ) battery post. Secure cable cap screw and lock
nut using two wrenches.
8. After connections are made, apply battery terminal
protector (Toro Part No. 107- 0392) or a light coat of
grease on all battery posts and cable connectors to re-
duce corrosion.
Charging
To minimize possible damage to the battery and allow
the battery to be fully charged, the slow charging meth-
od is presented here. This charging method can be ac-
complished with a constant current battery charger
which should be available locally.
CAUTION
Follow the manufacturer's instructions when us-
ing a battery charger.
NOTE: Using specific gravity of the battery cells is the
most accurate method of determining battery condition.
1. Determine the battery charge level from either its
specific gravity or open circuit voltage.
Battery Charge Specific
Level Gravity
100% 1.265
75% 1.225
50% 1.190
25% 1.155
0% 1.120
2. Determine the charging time and rate using the
manufacturer's battery charger instructions or the
following table:
Groundsmaster 7200/7210
Battery
Reserve
Capacity
(Minutes)
80 or
less
81 to 125
126 to
170
171 to
250
above
250
Do not charge a frozen battery because it can ex-
plode and cause injury. Let the battery warm to
o
60
Charge the battery in a well- ventilated place to
Open Circuit
dissipate gases produced from charging. These
Voltage
gases are explosive; keep open flame and elec-
12.68
trical spark away from the battery. Do not smoke.
Nausea may result if the gases are inhaled. Un-
12.45
plug the charger from the electrical outlet before
12.24
connecting or disconnecting the charger leads
from the battery posts.
12.06
11.89
3. Following the manufacturer's instructions, con-
nect the charger cables to the battery posts. Make sure
a good connection is made.
4. Charge the battery following the manufacturer's
instructions.
5. Occasionally check the temperature of the battery
electrolyte. If the temperature exceeds 125
or the electrolyte is violently gassing or spewing, the
charging rate must be lowered or temporarily stopped.
6. Three hours prior to the end of the charging, mea-
sure the specific gravity of a battery cell once per hour.
The battery is fully charged when the cells are gassing
freely at a low charging rate and there is less than a
0.003 change in specific gravity for three consecutive
readings.
Page 5 - 35
Battery Charge Level
(Percent of Fully Charged)
75% 50%
3.8 hrs 7.5 hrs
@ @
3 amps 3 amps
5.3 hrs 10.5 hrs
@ @
4 amps 4 amps
5.5 hrs 11 hrs
@ @
5 amps 5 amps
5.8 hrs 11.5 hrs
@ @
6 amps 6 amps
6 hrs 12 hrs
@ @
10 amps 10 amps
CAUTION
o
F (15.5 C) before connecting to a charger.
25% 0%
11.3 hrs 15 hrs
@ @
3 amps 3 amps
15.8 hrs 21 hrs
@ @
4 amps 4 amps
16.5 hrs 22 hrs
@ @
5 amps 5 amps
17.3 hrs 23 hrs
@ @
6 amps 6 amps
18 hrs 24 hrs
@ @
10 amps 10 amps
o o
F (51.6 C)
Electrical System