MAINTENANCE
3-29TX525 Service Manual Rev. 000
Battery Testing
Youmustrsthavethebatteryfullychargedpriorto
anytest.Thesurfacechargemustberemovedbefore
testing.Toremovesurfacechargethebatterymust
experiencealoadof20ampsfor3plusminutes.
Batteryspecicgravitycanbemeasuredbyusinga
hydrometerorarefractometer.
Loadtestingremovesampsfromabatterymuchlike
start-inganenginewould.Thebatterymayhavea
labelwiththeamploadfortestingand/oraCCACold
CrankingAmprating.Theloadtestnumberis1/2ofthe
CCArating.Forexample,a500CCAbatterywouldload
testat250ampsfor15seconds.Aloadtestcanonlybe
performedifthebatteryisnearoratfullcharge.
Ifyouhaveamaintenancefreebattery,theonlywaysto
testarewithadigitalvoltmeterand/oraloadtest.
Thereadingonthedigitalvoltmetershouldbethe
voltageshownintheprevioustable.Ifyouhavevoltage
readingsinthe10.5voltsrangeonachargedbattery,
thatindicatesashortedcell.
Batteriesusedinequipmentstoredforsomeportionof
theyearcandischargeandsulfationbetweenthebattery
platescanoccurandshortenthelifeofthebattery.