Battery Inspection, Maintenance, and Testing
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 1.225 or greater with the difference in spe-
cific gravity between the highest and lowest cell less
than 0.050. If these charging conditions can not be
met, replace the battery.
1.
Perform following inspections and maintenance:
A. Check battery case for cracks. Replace battery if
cracked or leaking.
B. Check battery terminal posts for corrosion. Use
wire brush to clean corrosion from posts.
IMPORTANT: Before cleaning the battery, tape
or block vent holes to the filler caps and make
sure the caps are on tightly.
3.
load tester.
Perform a high--discharge test with an adjustable
Thisisoneofthemostreliablemeansoftestingabattery
asitsimulatesthecold--crankingtest.Acommercialbat-
tery load tester is required to perform this test.
C. Check for signs of wetness or leakage on the top
ofthe battery which mightindicate aloose ormissing
filler cap, overcharging, loose terminal post or over-
filling. Also, check battery case for dirt and oil. Clean
the battery with a solution of baking soda and water,
then rinse it with clean water.
CAUTION
D. Check that the cover seal is not broken. Replace
the battery if the seal is broken or leaking.
Follow the load tester manufacturer’s instruc-
tions when using a battery load tester.
E. Check theelectrolyte levelineachcell.Ifthelevel
is below the tops of the plates in any cell, fill all cells
withdistilledwaterbetween theminimumandmaxi-
mum fill lines. Charge at 15 to 25 amps for 15 min-
utes to allow sufficient mixing of the electrolyte.
A. Check the voltage across the battery terminals
prior to load testing the battery. If the voltage is less
than 12.4 VDC, charge the battery.
B. If the battery has been charged, apply a 150 amp
load for 15 seconds to remove the surface charge.
Use a battery load tester following the manufactur-
er’s instructions.
2.
Conduct a hydrometer test of the battery electrolyte.
IMPORTANT: Make sure the area around the cells is
clean before opening the battery caps.
C. Make surebattery terminals arefreeofcorrosion.
A. Measure the specific gravity of each cell with a
hydrometer. Draw electrolyte in and out of the
hydrometer barrel prior to taking a reading to warm--
up the hydrometer. At the same time take the tem-
perature of the cell.
D. Measure the electrolyte temperature of the cen-
ter battery cell.
E. Connect a battery load tester to the battery termi-
nals following the load tester manufacturer’s in-
structions. Connect a digital multimeter to the
battery terminals.
B. Temperature correct each cell reading. For each
10
oF (5.5oC) above 80oF (26.7oC) add 0.004 to the
specific gravity reading. For each 10o F (5.5o C) be-
low 80o F (26.7o C) subtract 0.004 from the specific
F. Applyatestloadof345amps(onehalftheCrank-
ing Performance rating of the battery) for 15 se-
conds.
gravity reading.
Example: Cell Temperature
Cell Specific Gravity
100
(37.7
20
100oF
1.245
o F minus 80o F equals 20o F
o C minus 26.7o C equals 11.0o C)
o F multiply by 0.004/10o F equals 0.008
o C multiply by 0.004/5.5o C equals 0.008)
G. Take a battery voltage reading at 15 seconds,
then remove the test load. This reading is the test
voltage.
(11
ADD (conversion above)
Correction to 80o F (26.7o C)
0.008
1.253
Groundsmaster 5900/5910
Page 5 -- 65
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
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