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Old 06-21-2021, 11:46 AM   #1
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K2/k3 def head the same?

Does anyone know if the def tanks and def head are the same on the k2 and k3?
They both use a 15 gallon tank so you would think it’s the same tank
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Old 06-21-2021, 12:24 PM   #2
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K2/k3 def head the same?

When I spoke to Spartan Friday they said the heads are the same and only difference is the length of the tubing which is sized for different tanks. E.g., a 35 Newmar New Aire tank may be a different shape even if the same capacity.

If I remember they have 18 and 22 hoses otherwise the same.

- Richard
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Old 06-21-2021, 12:47 PM   #3
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Quote:
Originally Posted by RandDescape View Post
When I spoke to Spartan Friday they said the heads are the same and only difference is the length of the tubing which is sized for different tanks. E.g., a 35 Newmar New Aire tank may be a different shape even if the same capacity.

If I remember they have 18 and 22 hoses otherwise the same.

- Richard
Thank you. I would think since both the k2 and k3 have 15 gallon tank they would be the same
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Old 06-21-2021, 12:48 PM   #4
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The part number for the K3 is DM601-1800F765 if anyone wants to check. That is a Gen 6 part number
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Old 06-21-2021, 01:09 PM   #5
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Waiting for a call back from Spartan just to be safe. Since they both have 15 gallon tanks cant imagine they are different
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Old 06-21-2021, 01:33 PM   #6
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The part number for the K3 is DM601-1800F765 if anyone wants to check. That is a Gen 6 part number
And the generation number is indicated by the third character in the part number:

DM501-1800F765 = Gen 5

DM601-1800F765 = Gen 6

DM701-1800F765 = Gen 7

I'll include a photo of the part number tag that was attached to the replacement DEF head that is now installed on my coach.
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Old 06-21-2021, 01:57 PM   #7
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Quote:
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Waiting for a call back from Spartan just to be safe. Since they both have 15 gallon tanks cant imagine they are different


Spartan was explaining that they have different shapes of tanks for different motorhome models. Some taller and narrower others more short and wide - based upon what fits. They could both be 15gal.

Also there are K2 models like the Newmar Ventana that have a smaller tank (10gal) to match their smaller fuel tanks.

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Old 06-21-2021, 03:02 PM   #8
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Spartan confirmed the k2 and k3 use the same def head.

For what its worth he rattled off number of def head failures and FL was right up there with Spartan.. He said Shaw is building FLs def heads. No idea how true any of this is.
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Old 06-21-2021, 03:22 PM   #9
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Spartan confirmed the k2 and k3 use the same def head.

For what it’s worth he rattled off number of def head failures and FL was right up there with Spartan.. He said Shaw is building FLs def heads. No idea how true any of this is.
I suppose it's possible that Freightliner Custom Chassis Corporation (the business unit of Freightliner that builds RV chassis products) and/or other Freightliner business units used DEF heads from Shaw at some point in the past. Maybe some Freightliner business units are using Shaw DEF heads at present.

I tend to doubt all of that. Instead, I suspect the individual you spoke with is looking at the total number of DEF heads Freightliner (the entire company) has replaced over the past X months or Y years versus how many Spartan has replaced in the same time periods.

There are hundreds of thousands of Freightliner 18-wheeler tractors and regional trucks on the road, logging untold millions of miles in any given time period. Meanwhile Spartan is selling what - a thousand or so RV chassis products per year?

What matters is the failure rate per unit, or better yet the failure rate per unit-mile.
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Old 06-21-2021, 03:36 PM   #10
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I suppose it's possible that Freightliner Custom Chassis Corporation (the business unit of Freightliner that builds RV chassis products) and/or other Freightliner business units used DEF heads from Shaw at some point in the past. Maybe some Freightliner business units are using Shaw DEF heads at present.

I tend to doubt all of that. Instead, I suspect the individual you spoke with is looking at the total number of DEF heads Freightliner (the entire company) has replaced over the past X months or Y years versus how many Spartan has replaced in the same time periods.

There are hundreds of thousands of Freightliner 18-wheeler tractors and regional trucks on the road, logging untold millions of miles in any given time period. Meanwhile Spartan is selling what - a thousand or so RV chassis products per year?

What matters is the failure rate per unit, or better yet the failure rate per unit-mile.
Agree, completely.


Slowly, we are uncovering information that is allowing apples-to-apples comparisons. "Rattling off" raw numbers of DEF head failures might have worked a few weeks or months ago, but information about suppliers, and RV chassis vs all chassis, is revealing that only a much more defined comparison of DEF head failures will suffice. We don't know the "universe" of chassis from which those raw numbers came, but if the intention was to create a false equivalency, that is the way to do it.


At this time, we need many more specifics as to these failures than are being offered by typical PR presentations. We are beginning to know what questions to ask.
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