Engine Alternator Test Procedure - Lincoln Electric Cross Country 300 Service Manual

LINCOLN ELECTRIC
ENGINE ALTERNATOR TEST PROCEDURE
Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized
repairs performed on this equipment may result in danger to the technician or machine operator and will
invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety
notes and precautions detailed throughout this manual. If for any reason you do not understand the test
procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department
for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This test will determine if the Engine Alternator is properly charging the Battery.
MATERIALS NEEDED
Volt/Ohmmeter
Wiring Diagram
TEST PROCEDURE
1. Turn off the engine on the Cross Country 300 machine.
2. Open the engine access door to gain access to the alternator.
3. Using a volt/ohmmeter, measure the voltage at the battery terminals. Normal voltage is
approximately 12 VDC. See Wiring Diagram.
4. Set the 'Stop / (Auto Idle/Run) / (High Idle/Run)' switch in the 'High Idle/Run' position. See Figure
F.7.
5. Start the engine and allow it to run at high idle speed for approximately 15 to 30 seconds.
6. Using a volt/ohmmeter, measure the voltage at the battery terminals. Voltage should read
approximately 13.7 to 14.2 VDC. See Wiring Diagram.
7. If the meter reads correctly, the engine alternator is producing adequate power to charge the
battery and this test is complete.
8. Turn off the engine on the Cross Country 300 machine
9. If the voltage is significantly higher than the above values, the alternator is not properly regulating
the battery charging voltage and should be replaced. If the voltage reads the same or less than the
measurement taken in step three, proceed with the following tests.
10. Set the 'Stop / (Auto Idle/Run) / (High Idle/Run)' switch in the 'High Idle/Run' position, start the
engine and allow it to run at high idle speed for about 15 to 30 seconds.
11. Using a volt/ohmmeter, place the negative meter probe on a good chassis ground or the negative
battery terminal. Place the positive meter probe on the positive terminal of the alternator. See
Figure F.7. See Wiring Diagram. The measured reading should be about 13.7 to 14.2 VDC.
12. Place the positive meter probe to the IGN terminal on the rear of the alternator. See Figure F.8.
The meter should read about 13.7 to 14.2 VDC.
13. If the meter reads correctly, check the connections between the alternator and the battery. See
Wiring Diagram.
Cross Country™ 300 Service Manual
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