Toro GroundsmasterR 4300-D User Manual

Groundsmaster 4300--DPage 5 -- 46Electrical System
Battery Testing
1. Conduct ahydrometertest ofthe batteryelectrolyte.
IMPORTANT: Make sure thearea aroundthecells 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(5.5
o
C) above 80
o
F (26.7
o
C) add 0.004 to the
specific gravity reading. For each 10
o
F(5.5
o
C) be-
low 80
o
F (26.7
o
C) subtract 0.004 from the specific
gravity reading.
Example: Cell Temperature 100
o
F
Cell Gravity 1.245
100
o
F minus 80
o
F equals 20
o
F
(37.7
o
C minus 26.7
o
C equals 11.0
o
C)
20
o
F multiply by 0.004/10
o
F equals 0.008
(11
o
C multiply by 0.004/5.5
o
C equals 0.008)
ADD (conversion above) 0.008
Correction to 80
o
F (26.7
o
C) 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.C harge at the recommended rate and time giv-
en in Battery Charging in this section or until
specificgravityofallcells is1.225orgreater withthe
differenceins pecificgravitybetweenthehighestand
lowest cell less than 0.050. If these charging condi-
tions 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 battery load tester.
A. Check the voltage across the battery terminals
prior to testing the battery. If the voltage is less than
12.4 VDC, charge the battery (see battery charging
in this section).
B. If the batteryhas recently beencharged, remove
the battery surface charge before performing the
loadtest.Disconnecttheenginefuelstopsolenoidto
prevent theengine from starting. Engage thes tarter
motorforten( 10)secondstoremovebatterysurface
charge. Reconnect the fuel stop solenoid.
C. Makesurebatteryterminalsarefreeofcorrosion.
D. Measure the temperature of the center battery
cell.
E. Connectabattery loadtestertothebatterytermi-
nals following the load tester manufacturer’s in-
structions. Connect a digital multimeter to the
battery terminals.
F. Applyatestloadof295amps(onehalftheCrank-
ing Performance rating of the battery) for 15 se-
conds.
G. Take a battery voltage reading after 15 seconds,
then remove the load.
H. Using the table below, determine the minimum
voltage for the 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. Ifthetestvoltageisbelowtheminimumvoltagein
the chart, replace the battery. If the test voltage is at
or above the minimum, return thebattery to service.

Toro GroundsmasterR 4300-D Specifications

General

Brand	Toro
Model	GroundsmasterR 4300-D
Category	Lawn Mower
Language	English