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Old 12-08-2021, 08:58 AM   #15
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Originally Posted by gatorcq View Post
3260 RPM is the Overspeed Limit. With you hit it the ECU will shut it down. A computer is needed to remove the fault
I thought sustained redline on a 3126 was 2400 rpm or so, max 2800?
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Old 12-08-2021, 09:05 AM   #16
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I believe gov is set to 2650 or close to that. Anything over that is an over-speed
Rob & Laura
2002 American Tradition 40', 431hp Banks PowerPack
Mid-South TX
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Old 12-15-2021, 12:01 AM   #17
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Originally Posted by bpu699 View Post
I thought sustained redline on a 3126 was 2400 rpm or so, max 2800?
Mine used to cut off right at 2400.
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Old 12-16-2021, 08:11 AM   #18
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I believe you both are correct. At approximately 2400 RPM the computer shuts off the fuel injectors to stop from over revving the engine.

I was not accelerating I had the engine brake on and was decelerating downhill.

My root cause failure analysis says that the transmission downshifting one if not two gears over sped the engine causing mechanical damage.
John and Sue from W. Texas
2001 DSDP, 3126B Cat

"the Oilfield PAID me to retire, so I did" :-)
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