Lincoln Electric RANGER SVM148-B Service Manual page 94

F-35
AUXILIARY AND FIELD WINDING TEST (continued)
FIGURE F.10 – LOCATION OF LEADS #7 AND #9 AT FIELD BRIDGE RECTIFIER
To test the field winding:
1. With the 5/16" and 3/8" nut drivers, remove
the case right side.
2. Connect the volt/ohmmeter probes to leads
#7 and #9 where they connect to the Field
Bridge Rectifier. See Figure F.10.
3. Start the engine and run it at high idle (3700
RPM).
4. Set the output control to the maximum
position (position 10).
TROUBLESHOOTING & REPAIR
201
201A
_
+
AC
9
Cable
Tie
Capacitor
RANGER 300 D AND 300 DLX
7
AC
200
200A
200B
Field
Bridge
Retaining
Rectifier
9
Tab
200
200A
200B
5. Check the AC voltage reading. It should be
between 40 and 47 VAC.
If the reading is missing or not within spec-
ifications, check for loose or broken wires
between the test points and the stator
windings. See the Wiring Diagram. Make
sure that the windings are NOT grounded
internally to the stator iron. If the leads are
intact, then the stator may be faulty. Re-
place the stator. If the voltage reading is
within specifications, the windings are good
and functioning properly.
6. Reinstall the right case side.
F-35
201
201A
7