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Old 03-19-2017, 01:34 PM   #1
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Fuel water separator replacement

Anybody replace a fuel water separator on a 2011 Berkshire 360 FWS motorhome? I bought a separator from the local auto parts store using the NAPA part number 3412 which cross reference to a Wix number 33412 but it looks like it's different from the separator on the coach. The one on the coach is a Baldwin filter BF1346-0 but nobody can cross-reference that number. The one on the coach has wires on the bottom of it and it's a lot taller than the Wix filter I got. See photo. The existing Baldwin separator is orange and the new Wix separator is white. Click image for larger version

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Old 03-19-2017, 01:57 PM   #2
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Originally Posted by bdunningsr View Post
Anybody replace a fuel water separator on a 2011 Berkshire 360 FWS motorhome? I bought a separator from the local auto parts store using the NAPA part number 3412 which cross reference to a Wix number 33412 but it looks like it's different from the separator on the coach. The one on the coach is a Baldwin filter BF1346-0 but nobody can cross-reference that number. The one on the coach has wires on the bottom of it and it's a lot taller than the Wix filter I got. See photo. The existing Baldwin separator is orange and the new Wix separator is white. Attachment 155314
The Wix can be used but without the bowl
Donaldson P55134 also can be used but no bowl

The only two with the bowl that I see is the Baldwin 1346 and Racor
makes one if you can find one of their retail outlets.
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Old 03-19-2017, 02:06 PM   #3
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In checking the WIX 33812 should fit and requires the bowl. this is a 30 micron

The WIX 33813 is the same filter but 10 micron filter
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Old 03-19-2017, 03:08 PM   #4
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Thanks. I will see if they have the Wix filter you provided the number for does 30 Micron matter
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Old 03-19-2017, 03:52 PM   #5
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Thanks. I will see if they have the Wix filter you provided the number for does 30 Micron matter

If possible get the 10 micron filter it is a better filter.
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Old 03-19-2017, 05:45 PM   #6
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Here is a helpful website for filters.

http://www.filterbarn.com/search?ord...=HS541&lang=en

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Old 03-19-2017, 07:23 PM   #7
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Thanks. Got the 10 micron on order. Actually cheaper than the 30 micron. Go figure....
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Old 03-19-2017, 07:40 PM   #8
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Thanks. Got the 10 micron on order. Actually cheaper than the 30 micron. Go figure....
You will reuse the bowl on the old filter as the new one will not have one.
Most bowls are standard in size which is nice.
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Old 03-20-2017, 07:37 AM   #9
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If possible get the 10 micron filter it is a better filter.
A 10 micron filter removes more "stuff" than a 30, but that is not really an advantage since your fuel system also has a second, finer mesh filter to remove anything that passes through the primary & water separator. Using a 10 micron as the primary just catches any dirt there rather than at the second filter. Nothing wrong with that, but no real advantage either.

The 10 micron version is used primarily on single filter fuel systems. Both Cummins & Cat allowed single filter systems for a couple years but they went back to requiring two stage filtering back around 2005. Two stage worked more reliably.
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Old 03-20-2017, 07:54 AM   #10
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Hi Gary,

Been awhile.
The real advantages are the primary is larger and can hold more than the secondary
and on Cats the primary filter is before the fuel pump to protect it and the secondary is after the pump and filters the fuel just as it goes into the rail. On cats that secondary is a 3 micron Absolute rated filter and rather small.
I have not looked at the Cummins to see what order the filters are in.
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Old 03-20-2017, 08:02 AM   #11
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That connector on the bottom is your 'water in fuel' sensor. If you use a filter without it and leave it unplugged, you will probably get a continuous trouble light or alarm.
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Old 03-25-2017, 10:07 AM   #12
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Is the secondary on the isc between the fuel pump and caps pump?
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