Mobile Generator Output Voltage Troubleshooting
wc_tx000726gb.fm 79
8.11 Checking the Rectifier Diodes—Solder-in Style
Prerequisites Generator shut down
Procedure Follow the procedures below to check the rectifier diodes.
1. Remove the rear baffle (a) from the machine.
2. Remove the cover (b) from the generator.
3. Rotate the engine to access the diodes.
4. Using the diode scale on your multimeter, place the meter leads near the diode, one on
either side. Reverse the probes of your meter and check the diode again.
Each diode should conduct in one direction and not in the other. Your meter should read
0.4–0.5V in the direction that conducts.
Does each diode check OK?
The rectifier diodes have now been checked. Continue with Checking the Main Rotor Win-
ding. Note: If moving on to the next test, leave the generator disassembled.
Yes No
The diodes are OK.
Replace all diodes.
Call Wacker Neuson Service.
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