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Ask Hank F. Your Own Question
Hank F.
Hank F., Technician
Category: Small Engine
Satisfied Customers: 14482
Experience:  Certified on Onan and Generac generators
19372534
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Have an onan 5500 HGJAB. Oil was changed in September 2014,

Customer Question

Have an onan 5500 HGJAB. Oil was changed in September 2014, ran for 6 hours, periodic pump until January as I was living in it on a job. Gas tank was initially filled and used stabil. Power outage in January resulted in relying on generator at which it ran for 45 minutes them shut down. It has never ran again.
Code 45 comes up.
Brushes have over 5/8" remaining. Slip ring read 70 ohms at which I cleaned and now shows 30. Can visibly see the rings spinning while holding the start button. It will not continue to run after start button released.
Where should I in from here?
Submitted: 1 year ago.
Category: Small Engine
Expert:  Hank F. replied 1 year ago.

What is the full model number of the genset?

.

Customer: replied 1 year ago.
5.5HGJAB 6755D
Expert:  Hank F. replied 1 year ago.

Code 45 is Speed Sense Fault.

Connect a frequency meter to the output leads of the genset.

Press and hold the start button to keep the engine running for a few seconds.

What is the frequency reading?