Toro Greensmaster TriFlex 3400 - Page 228

Greensmaster 3300/3400Page 6 -- 58Electrical System
Battery Testing
1. Conduct ahydrometertestofthe batteryelectrolyte.
IMPORTANT: Makesure the areaaroundthe cells is
clean before opening the battery caps.
A. Measure the specific gravity of each cell with a
hydrometer. Draw electrolyte in and out of the
hydrometerbarrel priorto takinga readingto warm--
up the hydrometer. At the same time take the tem-
perature of the cell.
B. Temperature correct each cell reading. For each
10
o
F(6
o
C)above80
o
F(27
o
C)add0.004to thespe-
cificgravityreading.Foreach10
o
F(6
o
C)below80
o
F
(27
o
C)subtract0.004 fromthe specific gravityread-
ing.
Example: Cell Temperature 100
o
F
Cell Gravity 1.245
ADD (20
o
above 80
o
F) 0.008
Correction to 80
o
F 1.253
C. If the difference between the highest and lowest
cell specific gravity is 0.050 or greater or the lowest
cellspecificgravityislessthan1.225,chargethebat-
tery. Charge at the recommended rate and time giv-
en in Battery Charging or until all cells specific
gravity is 1.225orgreater with the difference in spe-
cificgravity betweenthehighestand lowestcell less
than 0.050. If these charging conditions can not be
met, replace the battery.
2. Perform a high--discharge test with an adjustable
load tester.
Thisisoneofthemostreliablemeansoftestingabattery
asitsimulatesthecold--crankingtest.Acommercialbat-
tery load tester is required to perform this test.
CAUTION
Follow the battery load tester manufacturer’s
instructions when using a load tester.
A. Check the voltage across the battery terminals
prior to testing the battery. If the voltage is less than
12.0 VDC, recharge the battery.
B. If thebatteryhas beencharged,apply a150amp
load for fifteen (15) seconds to remove the surface
charge. Use a battery load tester following the
manufacturer’s instructions.
C. Makesurethebatteryterminals arefreeofcorro-
sion.
D. Measure the temperature of the center cell.
E. Connectabatteryloadtester tothe batterytermi-
nals following the manufacturer’s instructions.
Connectadigitalmultimeter tothebatteryterminals.
F. Applyatestloadof150amps(onehalfthecrank-
ing performance ratingof the battery) for fifteen(15)
seconds.
G. Take a battery voltage reading after fifteen (15)
seconds, then remove the load.
H. Using the table below, determine the minimum
voltage for the center cell temperature reading.
Minimum
Voltage
Battery Electrolyte
Temperature
9.6 70
o
F (and up) 21
o
C (and up)
9.5 60
o
F 16
o
C
9.4 50
o
F 10
o
C
9.3 40
o
F 4
o
C
9.1 30
o
F -- 1
o
C
8.9 20
o
F -- 7
o
C
8.7 10
o
F -- 12
o
C
8.5 0
o
F -- 18
o
C
I. If the test voltage is below the minimum voltage
listed in thetable, replace thebattery. Ifthe test volt-
ageis ator abovethe minimum,return thebattery to
service.