6.
cable connectors to reduce corrosion after connections
are made.
Apply a light coat of grease on all battery posts and
Battery
Reserve
Capacity
(Minutes)
Battery Charge Level
(Percent of Fully Charged)
75%
50%
25%
0%
7.
Connect a digital multimeter (set to amps) between
80
or less 3.8 hrs
@
7.5 hrs 11.3 hrs 15 hrs
@ @ @
3 amps 3 amps 3 amps
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.
3
amps
81
to 125 5.3 hrs 10.5 hrs 15.8 hrs 21 hrs
@
@ @ @
4 amps 4 amps 4 amps
4
amps
8.
Connect negative (ground) cable connector to the
negative battery post. Tighten cap screw and lock nut
with two wrenches.
126
to
5.5 hrs
@
11 hrs
@
5 amps 5 amps 5 amps
16.5 hrs 22 hrs
170
@ @
5
amps
Charging
171
250
to
5.8 hrs 11.5 hrs 17.3 hrs 23 hrs
@
amps
@ @ @
6 amps 6 amps 6 amps
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 is available in most shops.
6
above
250
6 hrs
@
12 hrs
@
18 hrs
@
24 hrs
@
10
amps 10 amps 10 amps 10 amps
CAUTION
CAUTION
Do not charge a frozen battery because it can ex-
plode and cause injury. Let the battery warm to
Follow the manufacturer’s instructions when us-
ing a battery charger.
60
oF (15.5o C) before connecting to a charger.
NOTE: Using specific gravity of the battery cells is the
most accurate method of determining battery condition.
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.
1.
specific gravity or open circuit voltage.
Determine the battery charge level from either its
Battery Charge
Level
Specific
Gravity
Open Circuit
Voltage
100%
75%
50%
25%
0%
1.265
1.225
1.190
1.155
1.120
12.68
12.45
12.24
12.06
11.89
3.
Following the manufacturer’s instructions, con-
nect thecharger cables to thebattery.Makesure agood
connection is made.
4.
instructions.
Charge the battery following the manufacturer’s
2.
manufacturer’s battery charger instructions or the
following table:
Determine the charging time and rate using the
5. Occasionally check the temperature of the battery
electrolyte. If the temperature exceeds 125oF (51.6oC)
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.
Groundsmaster 3500--D
Page 5 -- 27
Electrical System (Rev. D)
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|---|---|
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