Toro Workman 3000 Series Service Manual page 358

6. Apply a light coat of grease on all battery posts and
cable connectors to reduce corrosion after connections
are made.
7. Connect a digital multimeter (set to amps) between
the negative battery post and the negative (ground)
cable connector. The reading should be less than 0.1
amp. If the reading is 0.1 amp or more, the unit's electri-
cal system should be tested and repaired.
8. Connect negative (ground) cable connector to the
negative battery post. Tighten cap screw and lock nut
with two wrenches.
Charging
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 accom-
plished with a constant current battery charger which is
available in most shops.
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
open specific gravity or circuit voltage.
Battery Charge Specific
Level Gravity
100%
75%
50%
25%
0%
2. Determine the charging time and rate using the
manufacturer's battery charger instructions or the
following table.
Electrical System (Rev. G)
CAUTION
Open Circuit
Voltage
1.265 12.68
1.225 12.45
1.190 12.24
1.155 12.06
1.120 11.89
Battery
Reserve
Capacity Capacity
(Minutes)
80 or less 3.8 hrs
3 amps
81 to 125 5.3 hrs
4 amps
126 to 5.5 hrs
170
5 amps
171 to 5.8 hrs
250
6 amps
above
250
10 amps
Do not charge a frozen battery because it can ex-
plode and cause injury. Let the battery warm to
60_F (15.5_ C) 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 elec-
trical spark away from the battery. Do not smoke.
Nausea may result if the gases are inhaled. Un-
plug the charger from the electrical outlet before
connecting or disconnecting the charger leads
from the battery posts.
3. Following the manufacturer's instructions, con-
nect the charger cables to the battery. 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_F (51.6_C)
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, measure
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 read-
ings.
Page 8 – 24
Battery Charge Level
(Percent of Fully Charged)
75% 50% 25%
7.5 hrs 11.3 hrs
@ @ @
3 amps 3 amps
10.5 hrs 15.8 hrs
@ @ @
4 amps 4 amps
11 hrs 16.5 hrs
@ @ @
5 amps 5 amps
11.5 hrs 17.3 hrs
@ @ @
6 amps 6 amps
6 hrs 12 hrs 18 hrs
@ @ @
10 amps 10 amps
CAUTION
Workman 3000/4000 Series
0%
15 hrs
@
3 amps
21 hrs
@
4 amps
22 hrs
@
5 amps
23 hrs
@
6 amps
24 hrs
@
10 amps