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Old 05-04-2017, 09:01 PM   #1
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Question Adjusting Fuel Cutoff Solenoid-HELP

Hey TF. I spend the morning with a Cummins Technician on the phone and he had me go through some steps It would seem my fuel cutoff solenoid is bad. Shorted to ground.

If you have been following us, you know we had a rough crossing over the Columbia River Bar. This put water into one of my cylinders causing a hydraulic lock. I pulled all the injectors (3 in all) and turned over the engine and blew out all the water. Put everything back together and it ran for 4 hours, but I had fuel all over everything, to include the fuel cutoff solenoid. This caused it to go bad.

Does anyone know the proper procedure to adjust the rod on this solenoid?
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Old 05-04-2017, 09:21 PM   #2
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Did you check at the price f a replacement part? Diesel fluid solenoid should not be very expensive if m right, this may be easier.

Just a thought from a rookie

L.
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Old 05-04-2017, 09:23 PM   #3
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Which model engine?
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Old 05-04-2017, 09:36 PM   #4
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Onan


Model and Spec: 8.0 MDKD-3CR/26501B
Ser# I870947950


There is nothing in my manuals that show the adjustment procedures...
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Old 05-04-2017, 09:45 PM   #5
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I hope you checked the crankcase oil for signs of water from the hydrolock....
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Old 05-04-2017, 10:56 PM   #6
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Ok Tom, sounds like a new genny is on the wish list for next year, damn, and I thought a Auto Pilot would make the top of the list.

I am so glad we got "Otto" fixed, the admiral really talks sweet nothings to "Otto"
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Old 05-04-2017, 11:51 PM   #7
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Adjust it so when it pulls across, it pulls across all the way. That way, once it starts, the "hold" is active, not the "pull across" bit. Unless it pulls right across it won`t start.
Where was all the fuel coming from?
The 2 problems I`ve had are:
1)the fuel solenoid. If it goes bad, replace it. I think the solenoid for MDKD and DKD is part 307-2546-00. (Cummins $300,Chinese version $60, Cummins one is made in China.)
2)The fuel filter not sealing in the housing it screws into, due to the housing being out of shape (?overtightening)= fuel everywhere. When I fitted the filter, and test ran it, dry as..next time, leaked copiously. Solution, new filter housing.
Some discussion about the solenoid is/was here: www.smokstak.com/forum/showthread.php?t=89089
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Old 05-05-2017, 08:28 AM   #8
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On the MDKD, you adjust the fuel solenoid linkage so when fully retracted (energized), there is still some slop in the linkage. Plunger needs to fully bottom. It is not that important that stop lever be held firm against its stop.
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Old 05-05-2017, 11:10 AM   #9
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Quote:
Originally Posted by rochepoint View Post
I hope you checked the crankcase oil for signs of water from the hydrolock....
I did, no water
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Old 05-05-2017, 11:13 AM   #10
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Where was all the fuel coming from?
I was getting fuel out of the line feeding the injectors. Yes I did turn the fuel off.

Thanks
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Old 05-05-2017, 11:16 AM   #11
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Originally Posted by Crusty Chief View Post
Ok Tom, sounds like a new genny is on the wish list for next year, damn, and I thought a Auto Pilot would make the top of the list.

I am so glad we got "Otto" fixed, the admiral really talks sweet nothings to "Otto"
Otto is still sleeping. Should get part this afternoon. Yep I paid the Cummins price.

There is a cheaper china part? Figures

Thanks NC
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Old 05-05-2017, 11:22 AM   #12
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I did, no water
Perfect.......
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Old 05-05-2017, 11:59 AM   #13
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I would change the oil, just in case. I did the same on my propulsion engine- hydrolocked it and squeezed the water past the rings with a bar over. After starting and running fine- no visible water but sodium in oil sample was 700 ppm. Should be less than 10.

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Old 05-05-2017, 12:29 PM   #14
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I have an MDL3 using a Stanadyne DB2 injector pump, used in many diesels up to 8 cylinders. I've attached a couple of info sheets from Oregon Fuel Injection that may help. I also have a Stanadyne DB2 operation & instruction pdf that is over Trawlers size limit. Could be sent email.
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Old 05-05-2017, 01:04 PM   #15
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I would change the oil, just in case. I did the same on my propulsion engine- hydrolocked it and squeezed the water past the rings with a bar over. After starting and running fine- no visible water but sodium in oil sample was 700 ppm. Should be less than 10.

David
Good point.
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Old 05-05-2017, 01:05 PM   #16
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Quote:
Originally Posted by Lepke View Post
I have an MDL3 using a Stanadyne DB2 injector pump, used in many diesels up to 8 cylinders. I've attached a couple of info sheets from Oregon Fuel Injection that may help. I also have a Stanadyne DB2 operation & instruction pdf that is over Trawlers size limit. Could be sent email.
Thank you
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Old 05-05-2017, 01:08 PM   #17
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Just curious, not familiar with how rough seas get water into engine, guessing from burying the stern in following seas when engine not running?
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Old 05-05-2017, 01:13 PM   #18
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Does the water travel up the exhust or through the through hull pass the raw water pump?
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Old 05-05-2017, 01:22 PM   #19
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I think up the exhaust which is why you want a loop.
But...this is "I think"....far from fact.

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Old 05-05-2017, 01:45 PM   #20
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I have a water muffler.
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