Gas to Diesel Generator conversion - Dutchmen Owners

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Old 01-19-2017, 11:21 AM   #1
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Gas to Diesel Generator conversion

Getting ramped up to remove my 5500 gasser and replace it with a 7500 Quiet Diesel unit.

That part is straight forward and easy. The more involved part will be disabling the Load Management System. I will be my own LMS as I am not at all happy with the lack of proper functioning of the LMS. Precision Circuits have been as helpful as they can be, but ultimately, Dutchmen installed it and we all know how great they are at assembling our rigs!

Any thoughts or personal experience in doing this? I will post pics as I go - this will be an ongoing project until ready to go on the first trip this spring.

That being said, there will be a 5500 Onan for sale with, I believe 378 hours on it (I will confirm).
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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 01-19-2017, 04:38 PM   #2
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There can't be much more you could possibly do to outfit\upgrade your castle.

But this upgrade is sweeeet.
How much quieter? Night and day, or just substantial?

I haven't heard the latest quiet diesels in generators. But the latest trucks are crazy quiet standing right next to them. Eerily quiet.
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Old 01-19-2017, 04:45 PM   #3
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Not really any more quiet. I mainly want to be able to go the whole race weekend without having to lug gas cans as both tanks will be used for diesel. Plus I have a 91 gallon tank in the bed of my truck with a pump just in case. My in laws have a diesel and the sound is not really all that noticeable when you are surrounded by hundreds of generators running 24/7 at the track.

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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 01-19-2017, 10:00 PM   #4
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Don,

I followed a thread about exchanging a gas for a diesel generator on another forum and it was mentioned that some modifications would also need to be made the fuel tank to switch it over... I can't remember exactly what was said but maybe something to check into???

Also I installed a 5500 Onan into a generator prepped toyhauler back in 2013 and can offer some advice about the hard way vs the easy way. We finally had to unscrew the bottom of the sheet metal generator box on the door side and pull it back to get the generator to fit in and the easy way to do that was to set it on the tailgate of a truck backed up to where you could use a plywood ramp to slide it off so you didn't damage the lip of the door frame.
Also before I put it in it was an easy job to line the box with Dynamat heat / soundproofing.

The reason I was following that thread was that I've considered doing the same, but I'll probably wait until my next toyhauler and order it just with the generator prep so I can install what I want.
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Old 01-19-2017, 10:03 PM   #5
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Good idea on the mat. The only mood to the fuel tank/system should be the addition of a return line. Thank you for chiming in!

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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 01-19-2017, 10:03 PM   #6
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Quote:
Originally Posted by donzinger View Post
Good idea on the mat. The only mood to the fuel tank/system should be the addition of a return line. Thank you for chiming in!

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Mod, not mood. LOL

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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 01-31-2017, 07:39 AM   #7
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Generator recieved

Got the diesel unit delivered last night. Used with 493 hours on it for a lot less than new. Install is going to be a long and slow process given the limited time I have, but I don't really need it until June for MIS. Will update as I go.
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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 02-01-2017, 07:38 AM   #8
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Test run last night on the floor of the barn with a 5-gallon can of fuel and a set of jumper cables - once primed she started right up and ran great. Quieter than expected. It also throttled back from the full 3200rpm to 1600rpm after running about a minute. So the no load, throttle down works as well.
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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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Old 02-07-2017, 08:48 PM   #9
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Quote:
Originally Posted by donzinger View Post
Test run last night on the floor of the barn with a 5-gallon can of fuel and a set of jumper cables - once primed she started right up and ran great. Quieter than expected. It also throttled back from the full 3200rpm to 1600rpm after running about a minute. So the no load, throttle down works as well.


That's awesome I bet the longevity and the economy of the diesel should be outstanding... what model # and did it fit nicely with no mods?... how was it hooking up ?.. was it drain and rinse tank then plugn play?


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Old 02-07-2017, 10:09 PM   #10
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Got an Onan QD7500. My measurements show it will fit fine, but thinking I'll go from below to install it due to clearance issues thru the compartment door. Will drain what is left in the tank and let it dry. Will have to run a return line too. Planning to drop the tank as the gage has never worked

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2014-3950, Full Paint, 17.5" tires, 370W solar, 3100W Magnum inverter w/ AGS, 7500w diesel generator, Micro-Air Easy Start 364 (x3)
2005 Ram 3500 CTD, ATS Aurora 3000, air bags, train horns, Banks hardware, Smarty Jr software, 105 gal aux tank
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