Toro Groundsmaster 5900 Series Service Manual page 305

Battery Test (Open Circuit Test) (continued)
Charging System Tests
Groundsmaster ® 5900 & 5910
16227SL Rev B
3. Access the batteries (see
Installation (page 6–142)) and disconnect the battery to be tested as follows
(Figure 184):
A. 12 Volt system batteries: Disconnect the positive (+) red battery cable
from either of the 12 Volt system batteries.
B. 24 Volt cooling fan system batteries: Disconnect either end of the red
jumper cable between the two (2) 24 Volt system batteries.
Note: This test provides a relative condition of the battery. Load testing of
the battery will provide additional and more accurate information (see
Service (page 6–139)).
4. Use a multimeter to measure the voltage between the battery terminals of
any isolated battery. Set multimeter to the DC volts setting. The battery
should be at a temperature of 16 to 38 ºC (60 to 100 ºF). Connect the positive
(+) meter lead to the positive battery post and the negative (−) meter lead to
the negative battery post (see below table).
Voltage Measured
12.68 V (or higher)
12.45 V
12.24 V
12.06 V
11.89 V (or lower)
g288426
1. 12 Volt system batteries
Battery Removal (page 6–140)
Battery Charge Level
Fully charged (100%)
75% charged
50% charged
25% charged
0% charged
2
1
Figure 185
2. 24 Volt cooling fan batteries
Page 6–43
and Battery
Electrical System: InfoCenter Display
Battery