Toro Groundsmaster 4300-D - Page 321

Inspecting,Maintaining,andTestingtheBattery(continued)
E.Ifyouchargethebattery,applya150Aloadfor15secondstoremove
thesurfacecharge.Waitfor10minutesbeforeproceedingwithloadtest.
F.Applyatestloadof270A(1/2thecrankingperformanceratingofthe
battery)for15seconds.
G.Aftertestloadhasbeenappliedfor15seconds,takeatestvoltage
readingandthenremovetheload.Recordthetestvoltagereading.
H.UsetheMinimumVoltageTable(page5–97),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.
ChargingtheBattery
Tominimizedamagetothebatteryandallowthebatterytochargefully,dothe
followingslowchargingprocedure.Youcandothischargingprocedurewitha
constantcurrentbatterychargerthatislocallyavailable.
IMPORTANT
Followthemanufacturer'sinstructionswhenusingabatterycharger.
Note:Usingspecicgravityofthebatterycellsisthemostaccurateprocedure
ofdeterminingthebatterycondition.
1.Determinethebatterychargelevelfromeitheritsspecicgravityoropen
circuitvoltage.
BatteryChargeLevelSpecicGravityOpenCircuitVoltage
100%
1.26512.68
75%
1.22512.45
50%
1.19012.24
25%
1.15512.06
0%
1.12011.89
Groundsmaster
®
4300-D
Page5–97
ElectricalSystem:ServiceandRepairs
16226SLRevC