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Old 04-19-2021, 09:32 PM   #15
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What scan tool do you own and can you do a forced regen with it

Nexus 102, works great so far
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Old 05-05-2021, 05:35 PM   #16
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Today the DEF head replacement from Spartan arrived and after looking at the invoice it says it is a GEN 7 unit. This is the first I have read about a GEN 7 DEF head. It says it is a Ultrasonic DEF Head Unit with a Spartan part number of DM701-1800F765. It's not a direct replacement from reading on irv2 forum so will contact Spartan to find out what is needed to install in our 18 LA with the Spartan K-3 605 chassis. Hoping this is what we have been looking for the last two years of owners have to have their DEF head replaced.
Newmar Man


I just picked up my 2017 DS from the Amarillo Cummins dealer with a new GEN 7 DEF head installed. All covered under warranty by Spartan who sent the unit to Cummins for installation.

As we were coming across I-40 from Ft. Smith I began to get the low DEF, high temp, DEF quality, warning codes. Spoke to Spartan and they recommended not turning the engine off but driving either to Oklahoma City Cummins ( they told me they couldn’t get to me for 2 weeks) or to Amarillo Cummins. By the time we reached Amarillo, Spartan had already opened a claim and the next day when Cummins called Spartan they sent the head right away.

As a note of interest. At Amarillo Cummins there was a Tiffin that had been towed in the day before with a bad DEF head, a Blue Bird school bus in one bay with a bad DEF head, and before I left the service center a second school bus was being towed in with a bad DEF head. Matt, the service manager said on the school buses they replace just the sensors and not the entire head. Spartan sends a new head for installation.
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Old 05-08-2021, 10:31 PM   #17
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Lynn The DEF head lives in your DEF tank and has been a issue for the at least the 2 years with sending incorrect information to the ECM. This then sets off codes that can cause your coach to be derated to 5%. For us with a full summer of travel we weren't wanting to be down and out. One won't want to carry this unless they also had the ability to install the DEF head.
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Here’s a picture of a Gen 6 Def head I took at the Spartan booth at FMCA Perry rally a few weeks back.

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Old 05-08-2021, 10:46 PM   #18
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Here’s a picture of a Gen 6 Def head I took at the Spartan booth at FMCA Perry rally a few weeks back.

Attachment 327731

Sad thing is the gen 6 is outdated since the gen7 has been introduced
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Old 05-09-2021, 10:57 AM   #19
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We don't own a scan tool for the newer ECM. Our OTC scan tool doesn't work with the X-15 engine. At this time there isn't enough information to say you most clear the codes with a scanner after DEF head replacement.
Newmar Man

Recently had our DEF head replaced. Both codes cleared automatically once the head was replaced as confirmed by the tech as well as BlueFire.
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