Toro 30344 - Page 312

Inspecting,Maintaining,andTestingtheBattery(continued)
C.Ifthedifferencebetweenthehighestandlowestcellspecicgravityis
0.050ormoreorthelowestcellspecicgravityislessthan1.225,charge
thebattery.
D.ChargeattherateandtimegiveninChargingtheBattery(page6–85)
oruntilallcellsspecicgravityis1.225orgreaterwiththedifferencein
specicgravitybetweenthehighestandlowestcellislessthan0.050.If
youcannotmeetthesechargingconditions,replacethebattery.
3.Doahigh-dischargetestwithanadjustableloadtester.Thisis1ofthemost
reliablemeansoftestingabatteryasitsimulatesthecold-crankingtest.A
commercialbatteryloadtesterisrequiredtodothistest.
CAUTION
Followthemanufacturer'sinstructionswhenusingabatteryload
tester.
A.Checkthevoltageacrossthebatteryterminalsbeforetestingthebattery.
Ifthevoltageislessthan12.4VDC,chargethebatterybeforecontinuing
thetest;refertoChargingtheBattery(page6–85).
B.Ensurethatthebatteryterminalsarefreeofcorrosion.
C.Measuretheelectrolytetemperatureofthecenterbatterycell.
D.Connectabatteryloadtestertothebatteryterminalsfollowingthe
manufacturer'sinstructions.Connectadigitalmultimetertothebattery
terminals.
E.Ifyouchargethebattery,applya150Aloadfor15secondstoremove
thesurfacecharge.Waitfor10minutesbeforeproceedingwithloadtest.
F.Applyatestloadof270A(1/2thecrankingperformanceratingofthe
battery)for15seconds.
G.Aftertestloadhasbeenappliedfor15seconds,takeatestvoltage
readingandthenremovetheload.Recordthetestvoltagereading.
H.UsetheMinimumVoltageTable(page6–84),determinetheminimum
voltageforthecentercellelectrolytetemperaturereading.
MinimumVoltageTable
MinimumVoltageBattery-ElectrolyteTemperature
9.6
70°F(andup)21.1°C(andup)
9.5
60°F16°C
9.4
50°F10°C
9.3
40°F4°C
9.1
30°F-1°C
8.9
20°F-7°C
8.7
10°F-12°C
8.5
0°F-18°C
I.Ifthetestvoltageisbelowtheminimum,replacethebattery.Ifthetest
voltageisatorabovetheminimum,returnthebatterytoservice.
4.Afteryoumaketheconnections,applyterminalprotector(T oroPartNo.
107-0392)oralightlayerofgreaseonallthebatterypostsandcable
connectorstoreducecorrosion.
ElectricalSystem:ServiceandRepairs
Page6–84
Groundsmaster
®
3280-D/3320
05138SLRevB