Toro Reelmaster 3100-D Service Manual page 276

Inspecting, Maintaining, and Testing the Battery (continued)
Electrical System: Service and Repairs
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.
D. Charge at the rate and time given in
or until all cells specific gravity is 1.225 or greater with the difference in
specific gravity between the highest and lowest cell is less than 0.050. If
you can not meet these charging conditions, replace the battery.
3. Do a high-discharge test with an adjustable load tester. This is 1 of the most
reliable means of testing a battery as it simulates the cold-cranking test. A
commercial battery load tester is required to do this test.
Follow the manufacturer's instructions when using a battery load
tester.
A. Check the voltage across the battery terminals before testing the battery.
If the voltage is less than 12.4 VDC, charge the battery before continuing
the test; refer to
B. Ensure that the battery terminals are free of corrosion.
C. Measure the electrolyte temperature of the center battery cell.
D. Connect a battery load tester to the battery terminals following the
manufacturer's instructions. Connect a digital multimeter to the battery
terminals.
E. If you charge the battery, apply a 150 A load for 15 seconds to remove
the surface charge. Wait for 10 minutes before proceeding with load test.
F. Apply a test load of 270 A (1/2 the cranking performance rating of the
battery) for 15 seconds.
G. After test load has been applied for 15 seconds, take a test voltage
reading and then remove the load. Record the test voltage reading.
H. Use the Minimum Voltage Table (page
voltage for the center cell electrolyte temperature reading.
Minimum Voltage Table
Minimum Voltage
9.6
9.5
9.4
9.3
9.1
8.9
8.7
8.5
I. If the test voltage is below the minimum, replace the battery. If the test
voltage is at or above the minimum, return the battery to service.
4. After you make the connections, apply terminal protector (Toro Part No.
107-0392) or a light layer of grease on all the battery posts and cable
connectors to reduce corrosion.
Charging the Battery (page 6–53)
CAUTION
Charging the Battery (page
Battery-Electrolyte Temperature
70°F (and up)
60°F
50°F
40°F
30°F
20°F
10°F
0°F
Page 6–52
6–53).
6–52), determine the minimum
21.1°C (and up)
16°C
10°C
4°C
-1°C
-7°C
-12°C
-18°C
Reelmaster ®
20252SL Rev A
3100-D/3105-D