Lincoln Electric RANGER 305 D Service Manual page 93

RANGER 305D
TEST PROCEDURE
1. Turn the engine off.
2. Open the engine access door and check the
voltage at the battery terminals. It should be
approximately 12 volts DC.
3. Attach the meter leads to the battery terminals,
being careful to position them so they stay clear of
moving parts while the engine is running.
4. Place the idle switch in the "HIGH IDLE" position,
start the engine, and allow it to run at high idle
speed for about 15 to 30 seconds.
5. The meter should read about 13.7 to 14.2 VDC.
6. If the meter reads correctly the engine alternator is
producing adequate power to charge the battery
and this test is complete.
6. 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 when the engine was not
running, proceed with the following tests.
7. Turn off the engine, disconnect the meter from the
battery, and open the engine access door on the
left side of the machine.
8. Make sure the idle switch is still in the "high"
position, start the engine, and allow it to run at high
idle speed for about 15 to 30 seconds.
9. Place the negative meter probe on a good chassis
ground, or the negative battery terminal. Place the
positive meter probe on the battery terminal on the
ENGINE LTERN TOR TEST (continued)
FIGURE F.8 – LE D LOC TIONS
BATTERY
209
IGNITION
OIL PRESSURE SWITCH
210
back of the alternator. (Lead #209) See Figure F.8.
See Wiring Diagram.
10. The meter should read about 13.7 to 14.2 VDC.
11. Move the positive probe to the IGN terminal on the
back of the alternator. (Lead @210C) See Figure
F8.
12. 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.
14. If the voltage at both of the above test points reads
the same or less than the battery voltage
measurement taken when the engine was not
running, the alternator is defective. Repair or
replace it.
15. If battery voltage is present at the battery terminal
of the alternator, but not at the "IGN" terminal;
check the run/stop switch and the wiring
connecting the "IGN" terminal to the switch. See
Figure F8.
F 36
TROUBLESHOOTING & REPAIR