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TROUBLESHOOTING & REPAIR
DC EXCITER TEST (continued)
FIGURE F.1 – 120VDC RECEPTACLE
SERIES COIL CONNECTION
POINT (NEGATIVE)
POSITIVE
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TEST PROCEDURE
1.Turn off the engine and remove all external loads to the welder terminals and auxiliary receptacle.
WARNING
MOVING PARTS can injure.
•Remove guards only when necessary to perform service, and replace them when the service requiring their removal is complete.
•Keep hands, hair, clothing and tools away from
•If fan guards are missing from a machine, obtain replacements from a Lincoln Distributor. (See Parts List.) Always use greatest care when working near moving parts.
2.Start the engine and put the idler switch in the HIGH idle position.
3.Using the volt/ohmmeter, carefully check the DC voltage at the 120V receptacle. (Observe proper polarity. The large slot of the receptacle is negative. See Figure F.1.) Normal voltage is 125 - 135VDC, no load, with the engine at the high idle speed of 1600 RPM. If the voltage is normal, the DC exciter is functioning correctly. If the voltage is low or not present, proceed to the next step.
