Lincoln Electric RANGER 305 D Service Manual page 112

RANGER 305D
ST TOR SHORT CIRCUIT & GROUND TEST
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 there are undesirable electrical connections between the stator windings and chassis
ground, or between individual windings within the stator.
This test should be performed if flashing voltage is present at the rotor slip rings, Rotor resistance, field bridge
rectifier, field capacitor and all associated wiring are proven to be good, but the stator output voltage fails to
build-up to normal levels, or is too high in one or more, but not all, of the windings.
M TERI LS NEEDED
Miscellaneous hand tools
Ohm meter
W RNING
F 55
TROUBLESHOOTING & REPAIR