| [GMCnet] Generator Malfunction [message #341999] |
Tue, 26 March 2019 14:06  |
Oliver Moore
Messages: 21
Registered: March 2018
Karma:
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Junior Member |
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I confess that generators and electricity are not my area of expertise. So
here is my problem. The Onan had been working perfectly when I shut it
down. When I fired it up a week later it would only charge 6-8 volts. If
I pushed the throttle arm I could get a few more volts. I removed the
solid state regulator boardand sent it out to be tested. It tested fine.
A tech from the local Onan dealer came out and "flashed" it using a D
cell. He diagnosed the problem as a bad diode or a shorted winding. I
have a service manual for the genset and the Onan tests are far more
detailed. So I am wondering if the tech really did enough to pin the
problem on diodes or windings?
When I removed the regulator board there were two cylindrical things not
wired on the board but connecting. I don't know what they do, but could
one of them go bad and causes the charging problem? My genset is
self-exciting. If the winding have really shorted I can get an entire
generating end cheaply. It is for the same model but older and has brushes
instead of the self-exciting circuit. Does anyone know if that would fit?
Any and all suggestions will be most appreciated.
Oliver Moore
1973 26-footer
Restored by Cinnebar with a Patterson Stage 2 engine and Thorley Headers
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