Onan 5500 Producing 2.0 volts. Pics inside
Ok so here is the issue and here is what I have done. Diagnosis: 2.0 VAC output measured both at transfer switch and then at breakers on genset itself. Attempted Remedy: *Followed Troublesho...
Forum Discussion
Here is a little more info that you can use to trouble shoot your gen set. This was provided to me by Generator Jim when my Onan failed.
1. Pull the air filter and remove the brush cover from the generator housing behind the filter.
2. Unplug the two wires that feed the brushes and tape them to prevent shorting them out. Make sure the brushes are free in their holders and the slip rings are fairly clean.
3. Obtain two jumper wires. Connect as follows:
3a. Connect the bottom brush to the frame of the generator set.
3b. Connect to the top brush and leave it hanging free - but safe.
4. Open the two circuit breakers on the output of the unit.
5. Connect a multimeter on the buss bars as you did before.
6. Start the unit, observe the multimeter, and connect the one loose brush wire to the battery positive cable on the generator set starter solenoid.
7. This will put 12 volts DC on the stator. It should generate about 65 volts no load at the generator output.
8. If no output voltage, bad rotor and/or stator.
9. If voltage, you have a bad voltage regulator or problems in the wiring to the regulator.
10. Go buy a service manual.
Richard
1. Pull the air filter and remove the brush cover from the generator housing behind the filter.
2. Unplug the two wires that feed the brushes and tape them to prevent shorting them out. Make sure the brushes are free in their holders and the slip rings are fairly clean.
3. Obtain two jumper wires. Connect as follows:
3a. Connect the bottom brush to the frame of the generator set.
3b. Connect to the top brush and leave it hanging free - but safe.
4. Open the two circuit breakers on the output of the unit.
5. Connect a multimeter on the buss bars as you did before.
6. Start the unit, observe the multimeter, and connect the one loose brush wire to the battery positive cable on the generator set starter solenoid.
7. This will put 12 volts DC on the stator. It should generate about 65 volts no load at the generator output.
8. If no output voltage, bad rotor and/or stator.
9. If voltage, you have a bad voltage regulator or problems in the wiring to the regulator.
10. Go buy a service manual.
Richard
