Forum Discussion

superk's avatar
superk
Explorer
Nov 02, 2014

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 Troubleshooting guide to brushes, lots of life left on them
*Electrical Contact cleaner used on slip rings
*Used a wand with cloth on the end to help clean slip rings.
*Checked ground between genset and chassis, ground seems ok.

Attached is pic of rings. I dont know if they are worn or still dirty.

I measured resistance across the rings, 22 ohms. Apparantly about 30 is normal from what I have been reading.

The genset is inside a 1999 fleetwood bounder 34v. The remote on dash starts it just fine, and the genset runs quickly and quietly without any fuss. After all this, still only 2.0v ac on genset.

  • I would just like to follow up on this thread. It has been a few months now since the voltage regulator came in, and was installed.

    upon connecting the new regulator, problem solved. the generator ran for about 20 hours with no problems.

    TO ANYONE WHO CAME UPON THIS THREAD BY A SEARCH. READ BELOW, ITS IMPORTANT!!

    When these kind people take their time to help you, dont ignore or dismiss their advice. I bought the slip stick *just in case* but didnt really actually use it other than the first time.

    The rings got dirty, and then, when I needed the generator the most, it would not produce power because the voltage regulator gave up again.

    I observed that my once clean rings were now dirty again. I spent the 30 seconds it took to clean them, and the generator ran for 12 hours steady with no issues.

    KEEP IT CLEAN, KEEP IT ALIVE.