M1031 PTO gen high revving

[Dunkeye11]

So I tried out my pto generator for the first time today. System engages ok, belt spins I engage the governor and go back to check the hertz. It’s operating in the 59-62 range for a few seconds and then high sides so I shut it down..... thoughts? As far as I can tell the backend wireing is ok. On the front end there is a concern as some threads on here says the system should be connected to the pink wire at the injection pump and not the green one.

I did not ground the system and I was operating in drive not 1st gear

 

[NDT]

This system was discussed a lot many years ago with lots of good information. Use search term "SECM".

 

[Keith_J]

Search the archives. Sounds like the ramp signal is excessive. You need a good multimeter to diagnose since the frequency meter may or may not be good. Get one that measures frequency. Could also be the PTO Hall effect sensor, this requires an oscilloscope to diagnose.

The frequency meter can read multiples of 60 Hz, could be showing correct frequency at an actual of 30 Hz. Such is the limit of blade type meters which is why a digital is better. Normal engine speed in drive gear is 1400 RPM, give or take torque converter slippage.