Toro Groundmaster Series - Charging the Battery

Inspecting,Maintaining,andTestingtheBattery(continued)
D.ChargeattherateandtimegiveninBatteryChargeRate(page6–67)
oruntilallcellsspecicgravityis1.225orgreaterwiththedifference
inspecicgravitybetweenthehighestandlowestcellbeinglessthan
0.050.Ifyoucannotmeetthesechargingconditions,replacethebattery.
3.Doahigh-dischargetestwithanadjustableloadtester.Thisisaveryreliable
meansoftestingabatteryasitsimulatesthebatterycold-crankingcapacity.
Acommercialbatteryloadtesterisrequiredtodothistest.
CAUTION
Followthemanufacturer'sinstructionswhenusingabatteryload
tester.
A.Checkthevoltageacrossthebatteryterminalsbeforetestingthebattery.
Ifthevoltageislessthan12.0VDC,chargethebatterybeforecontinuing
thetest.
B.Ifyouchargethebattery,applya150Aloadfor15secondstoremove
thesurfacecharge.Useabatteryloadtesterfollowingthemanufacturer's
instructions.
C.Ensurethatthebatteryterminalsarefreeofcorrosion.
D.Measuretheelectrolytetemperatureofthecentercell.
E.Connectabatteryloadtestertothebatteryterminalsfollowingthe
manufacturer'sinstructions.Connectadigitalmultimetertothebattery
terminals
F.Applyatestloadof1/2thecoldcrankingamperageratingofthebattery;
refertoBatterySpecications(page6–63).
G.Takeatestvoltagereadingwhilestillunderloadafter15seconds,then
immediatelyremovetheload.
H.UseMinimumVoltage(page6–65)todeterminetheminimumvoltagefor
thecentercellelectrolytetemperaturereading.
I.Ifthetestvoltageisbelowtheminimum,replacethebattery.Ifthetest
voltageisatorabovetheminimum,returnthebatterytoservice.
ChargingtheBattery
BatteryChargeLevel
BatteryChargeLevelSpecicGravityOpenCircuitVoltage
100%
1.26512.68
75%
1.22512.45
50%
1.19012.24
25%
1.15512.06
0%
1.12011.89
BatteryChargeRate
BatteryChargeLevel(PercentofFullyCharged)
Battery
Reserve
Capacity
(Minutes)
75%50%25%0%
Groundsmaster
®
3200,3300and3310
Page6–67
ElectricalSystem:ServiceandRepairs
19240SLRevA