Toro Groundmaster Series Service Manual page 258

Inspecting, Maintaining, and Testing the Battery (continued)
Minimum Voltage (continued)
Electrical System: Service and Repairs
8.9
8.7
8.5
1. Inspect the battery as follows:
A. Check for cracks. Replace the battery if cracked or leaking.
B. Check the battery terminals for corrosion. Use the wire brush to clean
corrosion from the posts.
Before cleaning the battery, tape or block the vent holes of the
filler caps and ensure that the caps are secure.
C. Check for the signs of wetness or leakage on the top of the battery which
might indicate a loose or missing filler cap, overcharging, loose terminal
post, or overfilling. Also, check the battery case for dirt and oil. Clean the
battery with a solution of baking soda (sodium bicarbonate) and water,
then rinse it with clean water.
D. Check that the cover seal is not broken away. Replace the battery if the
seal is broken or leaking.
Make sure the area around the battery caps is clean before
opening the caps.
E. Check the electrolyte level in each cell. If the level is below the tops of
the plates in any cell, fill all the cells with distilled water between the
minimum and maximum fill lines. Charge at 15 to 25 A for 15 minutes to
allow sufficient mixing of the electrolyte.
2. Perform the hydrometer test of the battery-electrolyte.
Make sure the area around the battery caps is clean before opening
the caps.
A. Use a hydrometer to measure the specific gravity of each cell. Pull the
electrolyte in and out of the hydrometer barrel before taking a reading
to warm-up the hydrometer. At the same time, take the temperature of
the cell.
B. Temperature correct each cell reading. For each 6°C (10°F) above 27°C
(80°F) add 0.004 to the specific gravity reading. For each 6°C (10°F)
below 27°C (80°F) subtract 0.004 from the specific gravity reading; refer
to Temperature Correcting Specific Gravity (page
C. If the difference between the highest and lowest cell specific gravity is
0.050 or more or the lowest cell specific gravity is less than 1.225, charge
the battery.
20°F
10°F
0°F
IMPORTANT
IMPORTANT
IMPORTANT
Page 6–66
-7°C
-12°C
-18°C
6–65).
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A