Onan Generator 1000 hour service
We are going to have to have the 1000 hour service done on our Onan 8000 generator in the next few months. It will require removing the generator to perform the service. Interested in hearing from a...
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The 7500/8000 Onan quiet diesels do not use brushes nor have a rear rotor shaft bearing (they use a permanent magnet rotor with an inverter to produce a.c. power) so that is one less worry for maintenance. But the fan belt is usually only good for 1500 hrs or so. Owners of the 10 and 12 kw units need to service the brushes and slip rings, plus rotor bearing at 3000 hrs or so. If bearing fails and spins in end frame, you may be looking at $2000 plus in parts plus labor for a $25 bearing failure. The Kubota engines are tough as nails, but scheduled oil and coolant maintenance keeps them running practically forever.
All these units use same coolant temp. sensor, and are often problematic. We always change the sensor at our shop when gen is out of coach. They are not very expensive. Water pumps usually last 5000+ hours, but most folks with motor homes in recreational use seldom put this many hours on them. It would be nice if motor home manufacturers would put all gensets on slideout frames, but they tend to not spend money where not necessary
All these units use same coolant temp. sensor, and are often problematic. We always change the sensor at our shop when gen is out of coach. They are not very expensive. Water pumps usually last 5000+ hours, but most folks with motor homes in recreational use seldom put this many hours on them. It would be nice if motor home manufacturers would put all gensets on slideout frames, but they tend to not spend money where not necessary
