Lincoln Electric RANGER 250 SVM150-A Service Manual page 82

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FIGURE F.13 – OUTPUT RECTIFIER BRIDGE CONNECTIONS
If any one or more of the readings are missing or
not within specifications, then check for loose or
broken wires between the test points and the sta-
tor windings. See the Wiring Diagram. Make
sure that the windings are NOT grounded inter-
nally to the stator iron. If the leads are intact,
then the stator may be faulty. Replace the stator.
If the voltage readings are within specifications,
then the windings are good and functioning prop-
erly.
7. If finished testing, perform the Case Cover
Replacement procedure.
To test the stator weld windings:
1. Locate the weld winding leads connected to
the three-phase output rectifier bridge. See
Figure F.13.
TROUBLESHOOTING & REPAIR
STATOR VOLTAGE TESTS (continued)
TOP
W1
CENTER
W2
W3
BOTTOM
W6
W7
W11
W4
W5
W10
W8
W9
RANGER 250
OUTPUT
RECTIFIER
BRIDGE
CHOKE
2. Check for approximately 58 - 65 VAC from
W1 to W2. Also check for the same voltage
from W2 to W3 and from W1 to W3.
3. If any of these voltages are low or missing,
perform the Flashing and Rotor Voltage
Test and also the Rotor Resistance Test.
4. If the tests in Step 2 are OK and the stator
voltages are low or missing, the stator may
be faulty.
5. If finished testing, perform the Case Cover
Replacement procedure.
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