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Thread: Experience With Preparing ISUZU NPS Camper: Body

  1. #31
    Join Date
    Mar 2012
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    O'Fallon, MO
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    895
    Quote Originally Posted by SkiFreak View Post
    Each to their own, but I do not regret installing the water trap into my fuel line, as it is a decent insurance addition, in my opinion.
    Also, I don't know how you would go filling a tank using a Hi-Flow fuel pump via a funnel.
    Its wise to add one if it didn't exist in the first place.

    Protection against water and dirt is easy, protection against cross contamination with other fluids isn't and is often overlooked.
    Last edited by dlh62c; 07-13-2017 at 09:01 AM.

  2. #32
    Join Date
    May 2016
    Location
    pomona qld australia
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    ok, so i want to install a filter with a water trap close to the fuel tank where it is visible enough to check every time i fill up. i want to leave original filter in place as well so do i go with a 30 micron or 5 micron filter or some thing differant

  3. #33
    Join Date
    Mar 2012
    Location
    O'Fallon, MO
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    895
    The OEM filter and separator should be sufficient to protect the system.

    Be careful modifying the low pressure side of the fuel system as it can impact the fuel system as a whole.

    Take the truck to a shop to see if the relative and absolute fuel pressures in the system are within spec.
    Last edited by dlh62c; 07-13-2017 at 11:55 AM.

  4. #34
    Join Date
    Nov 2010
    Location
    Canberra Australia
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    1,718
    i want to leave original filter in place as well so do i go with a 30 micron or 5 micron filter or some thing differant
    The determining factor is probably where the primer pump is located.

    I am not familiar at all with the Isuzus, as I have a Fuso, but on my truck the primer pump is at the engine, so it has to suck the fuel from the tank. If there is too much resistance in the fuel line then this will limit the fuel getting to the high pressure pump, which would not be good. On some trucks the primer pump is in the tank, so it pushes the fuel to the engine. Pushing fuel is much better than pulling when it comes to adding additional filtration.

    These trucks are known for running hundreds of thousands of kilometres, so I figure that the OEM fuel filtration must be pretty good already, so personally I saw no real need to improve it.
    The OEM fuel filter on my Fuso has an electronic water sensor, but the casing is solid black plastic, so there is no way you can do a visual inspection for water in the fuel, which is something I did not like. So, my main reason for adding the Racor filter was not to improve filtration; it was so that I had a water trap in front of the OEM fuel filter that I could inspect easily.

    Before adding my Racor filter I temporarily installed a vacuum gauge in the pickup line as close to the engine as I could to test the vacuum at that point. After adding the Racor filter there was a negligible increase in vacuum, which gave me confidence that I would not be affecting fuel flow with the addition of this filter. I am using 30 micron filters in the Racor, as this reduces the possibility of fuel flow restriction if it gets a bit dirty. I also have a permanently mounted vacuum gauge on the Racor now, so I can see if it does get dirty.

    So my advice... don't assume anything, test your setup before and after so you know for sure you are not fixing one problem while creating another.
    My attempt to build something to go somewhere else...
    Canter4x4.com

  5. #35
    Join Date
    Mar 2016
    Location
    Darwin NT Aust
    Posts
    36
    Hi tracka, I have a eurov nps which has a filter/water seperator as standard fit.

    The fleetguard part no for the element is FS19551, thanks to 4x4coaster, look at page2 of his build thread.

    specs say this is 10 micron, hope that helps.

    As Sifreak says, u would want to test to make sure your older model is happy with this

    cheers steve

  6. #36
    Join Date
    Aug 2014
    Location
    United States
    Posts
    416
    This is good stuff. I recently acquired a fuel filter/separator off of a wrecked Hino box truck. It has a heater and water sensor built in to it and the filter housing is clear for visual inspection of the filter and of the fuel color I assume. I mounted it next to my tank on the frame which is directly beside the lift pump on the cummins engine.

  7. #37
    Join Date
    Dec 2010
    Location
    Greeley CO
    Posts
    821
    When I bought my 1994 MF it had 2 water separators and I drained out about 4 table spoons of water out of the first one. I check them every time I crawl under to grease things. No problems since then.
    1992 FG, 1994 Hallmark camper.
    1961 CJ3b, V6,OD,PTO winch etc.
    1969 Jeep Commando.
    1998 Harley.
    2, 1982 XT 550's
    1953 Buick Special, that I get out about once a year, 62K original miles.

  8. #38
    Join Date
    Oct 2011
    Location
    Brisbane, Australia
    Posts
    92
    Quote Originally Posted by trackadda View Post
    ok, so i want to install a filter with a water trap close to the fuel tank where it is visible enough to check every time i fill up. i want to leave original filter in place as well so do i go with a 30 micron or 5 micron filter or some thing differant
    Our 2010 NPS has a pre-filter fitted by the local Isuzu workshop before we shipped overseas - same 5.2 diesel as the 2007 I think? I've only had to drain water from the pre-filter once - after a load of diesel in Austria of all places. I remember the workshop commenting on the need to ensure the fuel pump would cope but we ended up with a 2 micron pre-filter. The truck has done 100,000km since without problems.
    2010 Isuzu NPS with ATW Scout body

    www.beetrax.com

  9. #39
    Join Date
    May 2016
    Location
    pomona qld australia
    Posts
    40
    thanks for all the replies, i will get onto a diesel mechanic at isuzu and see what is available

  10. #40
    Join Date
    Dec 2010
    Location
    Greeley CO
    Posts
    821
    The best diesel mechanics I know of are about 5 blocks from my house or about 2 houses from me. They figured out things in 20 min that the dealer couldn't do in 4 days.
    I suppose this doesn't help you much. Best wishes for your finding a good mechanic. Good ones are out there. The only time I had to deal with my MF was to replace a cracked exhaust manifold. The dealer said that they have never had to order a new one. Not sure how it happened. I'm sure it was my fault, somehow.
    1992 FG, 1994 Hallmark camper.
    1961 CJ3b, V6,OD,PTO winch etc.
    1969 Jeep Commando.
    1998 Harley.
    2, 1982 XT 550's
    1953 Buick Special, that I get out about once a year, 62K original miles.

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