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Topic: Two fuel water separators on ISM 450 (Read 510 times) previous topic - next topic

Two fuel water separators on ISM 450

Good afternoon everyone,
I'm going to change fuel filters myself for the first time and just saw that I have two fuel water separator's.
Both are fleet guard.  FS1000  &. FS1212.
Is that ok or should I have a regular fuel filter and a fuel water separator.
Frank & Daisy
NO LONGER  "looking for the perfect Foretravel
36' or less non slide preferred."  She has been found and is ours.
2003 U320 36' non slide  Unit 6103
Cummins ISM 450
Allison 4000MH

Re: Two fuel water separators on ISM 450

Reply #1 –
The micron rating is what is important.

The primary  shows to be a 20 micron element.

The secondary fuel filters shows to be a 10 micron element.

If all your engine requires (check with Cummins for your engine serial number) is 10, you are good to go.

But (OK, LARGE BUT) it requires, say, 5 micron, then you need a finer secondary element.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020
 

Re: Two fuel water separators on ISM 450

Reply #2 –
Thanks Brett,
I went to NAPA and their filter is 5 micron.
Frank & Daisy
NO LONGER  "looking for the perfect Foretravel
36' or less non slide preferred."  She has been found and is ours.
2003 U320 36' non slide  Unit 6103
Cummins ISM 450
Allison 4000MH