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TROUBLESHOOTING & REPAIR
MAIN STATOR TEST (continued)
FIGURE F.6 - MAIN STATOR MOLEX PLUG TEST POINTS
FIGURE F.6 | FIGURE F.7 |
MAIN STATOR MOLEX PLUG TEST POINTS | DIODE BRIDGE LEAD ASSIGNMENTS |
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6A – Black
5A – White
3A – Black
7A – Blue
15A – Yellow
9A – Brown
7A (Blue)
TO STATOR
201 (Black)
201C (Black)
–
200 (Red)
200C (Red)
+
9A (Brown)
9B (Brown)
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5.Locate the 6 pin molex type connector from the main stator.
6.Check for 240 - 260 VAC at leads #6A to #3A. See Figure F.6. You may want to shut off the engine, insert the test probes into the molex plug, then restart the engine. Cut any necessary cable ties to perform the test.
NOTE: Insert the probes on the STATOR side of the plug. This will eliminate the possibility of problems in the plug itself.
7.Check for 120 - 130 VAC at leads #5A to #3A. See Figure F.6.
8.At the field rectifier diode bridge, check for 37.5 VAC at leads #9A (Brown) to #7A (Blue). See Figure F.7 and the Wiring Diagram. You may check these leads at the molex plug; however, it's best to check them at the rectifier bridge.
9.Check for 21.5 VAC at leads #9A (Brown) to #15A (Yellow). See Figure F.6.
10.If any ONE of the voltage readings are incorrect, the main stator may be faulty.
11.If ALL the voltage readings are incorrect, the problem may be the engine RPM or rotor field problems.
12.After the problem has been repaired, replace any cable ties that were cut for the test.
13.Install the control panel with the 6 sheet metal screws. Use the 5/16" nut driver and 5/16" wrench.
14.Replace the top cover on the control box. Tighten the 8 sheet metal screws with the 5/16" nut driver.
WELDANPOWER 125
