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TROUBLESHOOTING & REPAIR
ROTOR VOLTAGE TEST (continued)
FIGURE F.1 - LOCATION OF LEAD 202 FOR ROTOR VOLTAGE TEST
LEAD 202 | GROUND STUD |
CONNECTION |
|
(TOP TERMINAL, |
|
CASE FRONT |
|
IN PLACE |
|
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TEST PROCEDURE
1.With the 5/16” nut driver, remove the 8 sheet metal screws that hold the top cover to the control box. Remove the top cover.
2.Start the machine and run it at high idle. Set the output control (rheostat) at the MAXIMUM setting.
3.Set the volt/ohmmeter at the DC position.
4.Place the positive probe on lead #202 (two red wires joined together) where it con- nects at the back of the rheostat. See Figure F.1 for location. Place the negative probe on the machine ground stud or any other good, unpainted ground.
5.Check the voltage reading on the volt/ohm- meter. It should read 40 - 47 VDC.
6.If the voltage is low or not present, the gen- erator field circuit is not functioning cor- rectly. Proceed with the Rotor Resistance Test. C1, R1, or D1 may also be faulty.
7.If rotor voltage is correct, the generator field is okay. Replace the top cover on the control box. Tighten the 8 sheet metal screws with the 5/16” nut driver.
WELDANPOWER 125
