Electrical System Quick Checks
Testing the Battery (Open Circuit Test)
Use a multimeter to measure the voltage between the battery terminals; refer to
Battery Test Table (page 5–20)
.
Set the multimeter to the DC volts settings. The battery must be at a temperature
of 16°C to 38°C (60°F to 100°F). Ensure that the key is in the O
FF
position and
all the accessories are turned off.
Connect the positive (+) meter lead to the positive battery post and negative (-)
meter lead to the negative battery post.
Measure and record the battery voltage. Use the
Battery Test Table (page 5–20)
to determine charge level of the battery.
Note:
This test provides a relative condition of the battery. The load testing of
the battery provides additional and more accurate information; refer to
the Battery (page 5–61)
.
Battery Test Table
Voltage Measured
Battery Charge Level
12.68 V (or higher)
Fully charged (100%)
12.45 V
75% charged
12.24 V
50% charged
12.06 V
25% charged
11.89 V
0% charged
Testing the Charging System
This is a simple test that determines if a charging system is functioning. It tells
you if the charging system has an output, but not its capacity.
Tool required: Digital multimeter to set the DC volts.
Test instructions: Connect the positive (+) multimeter lead to the positive battery
post and negative (-) multimeter lead to the negative battery post. Keep the test
leads connected to the battery posts and record the battery voltage.
Note:
When starting the engine, the battery voltage drops and then must
increase once the engine is running.
Note:
Depending upon the condition of the battery charge and battery
temperature, the battery voltage increases at different rates as the battery
charges.
Start the engine and run it at high-idle speed
(3,000 rpm)
. Allow the battery to
charge for a minimum time of 3 minutes. Record the battery voltage.
Note:
After running the engine for a minimum time of 3 minutes, the battery
voltage must be minimum 0.50 V higher than that of the initial battery voltage.
Refer to the
Battery Voltage Table (page 5–21)
for an example of a charging
system that is functioning.
Electrical System: Electrical System Quick Checks
Page 5–20
Groundsmaster 7210
16222SL Rev C
Summary of Contents for Groundsmaster 7210
Page 4: ...NOTES Revision History Page 4 Groundsmaster 7210 16222SL Rev C...
Page 32: ...Specifications and Maintenance Special Tools Page 2 16 Groundsmaster 7210 16222SL Rev C...
Page 60: ...Diesel Engine Service and Repairs Page 3 28 Groundsmaster 7210 16222SL Rev C...
Page 196: ...Hydraulic System Service and Repairs Page 4 136 Groundsmaster 7210 16222SL Rev C...
Page 304: ...Chassis Service and Repairs Page 6 42 Groundsmaster 7210 16222SL Rev C...
Page 327: ...Drawing 105 7260 Rev E Sheet 1 16222SL Rev C Page A 3 Hydraulic Schematic g186843...
Page 328: ...Page A 4 16222SL Rev C Drawing 119 4372 Rev C Sheet 1 Electrical Schematic Platform g186842...
Page 329: ...Drawing 119 4377 Rev C Sheet 1 16222SL Rev C Page A 5 Electrical Schematic Engine g186841...
Page 336: ...Page A 12 16222SL Rev C Drawing 119 4386 Rev A Sheet 1 Wire Harness Drawing Cab Power g186851...
Page 342: ......
