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-   -   Fuel Filters for Dummies (http://www.sailnet.com/forums/diesel/66578-fuel-filters-dummies.html)

Classic30 07-19-2010 04:03 AM

Fuel Filters for Dummies
 
(Shamelessly cross-posted from A-S - because I'm an impatient bugger.. but you probably knew that already!!)


Just wondering if I'm missing something here.. Here's a pic of our fuel filter:

http://www.anything-sailing.com/atta...achmentid=2951

As I see it, there are two main controls - the fuel shut-off valve (yep, I can handle that ;) ) and the drain valve. AIUI, any water in this thing will settle to the bottom and show clear, relative to the yellowish diesel above it (in the pic above, you can just see the line above the bottom of the bowl).

Opening the drain, I get pretty much straight diesel out and the yellow/clear level doesn't change. Upon closer inspection, it seems that, from the location of the bleed point in the chamber, there needs to be about 1" of water in this thing before I can drain any out with the bottom bleed...? :confused:

My questions:

1. The drain plug is extremely hard to close off without it leaking diesel. Is it supposed to be this hard to shut off, or am I missing something?

2. Is there supposed to be water in the bowl at all times?

3. If not, how do I drain the water out??


Thanks,

RichH 07-19-2010 10:44 AM

Quote:

Originally Posted by Hartley18 (Post 623820)
(Shamelessly cross-posted from A-S - because I'm an impatient bugger.. but you probably knew that already!!)


Just wondering if I'm missing something here.. Here's a pic of our fuel filter:

http://www.anything-sailing.com/atta...achmentid=2951

As I see it, there are two main controls - the fuel shut-off valve (yep, I can handle that ;) ) and the drain valve. AIUI, any water in this thing will settle to the bottom and show clear, relative to the yellowish diesel above it (in the pic above, you can just see the line above the bottom of the bowl).

Opening the drain, I get pretty much straight diesel out and the yellow/clear level doesn't change. Upon closer inspection, it seems that, from the location of the bleed point in the chamber, there needs to be about 1" of water in this thing before I can drain any out with the bottom bleed...? :confused:

My questions:

1. The drain plug is extremely hard to close off without it leaking diesel. Is it supposed to be this hard to shut off, or am I missing something?

2. Is there supposed to be water in the bowl at all times?

3. If not, how do I drain the water out??


Thanks,

1. No the drain plug shouldnt be hard to shut off. However, with 'new' formulations of diesel, that plastic may be swelling a bit and therefore may be the reason for the difficulty.

2. No, it means that there is water in the tank .... free water in the bottom of the tank OR emulsified water in the fuel and that the filter media is 'coalescing' the emulsified, etc. water out of the fuel.

3. For this type of drain, and because your pic shows some 'space' under the filter bowl, .... I'd recommend that you remove the 'plug' at the drain and install a 'metal' cockvalve instead. Then if you in future visualize free water in the clear bowl, then all you'd have to do is open the '**** valve' to drain the water .... dont need a 'wrench/spanner' to open a cockvalve.

Note this STUPID server is censoring my post.... and the **** above is reference to a 'rooster' .... begins with a c and ends with a K and when spelled backwards is 'kcoc' and is a proper name for a small valve that operates with a wingnut or 'thumbnut'.

Classic30 07-19-2010 07:35 PM

Thanks, Rich - I know what you mean. See my reply on that other forum. ;)

One issue I still have is that, upon opening the bleed, I only get fresh diesel out - the "water" level in the filter does not change. Retaining water (any water) just seems to be a really strange design to me and I can't find anything about it on the web.. :confused:

DwayneSpeer 07-20-2010 01:11 PM

picture
 
Your picture isn't coming thru and seems to also be missing from AS. Perhaps you could try again.

Classic30 07-20-2010 08:25 PM

1 Attachment(s)
Quote:

Originally Posted by DwayneSpeer (Post 624310)
Your picture isn't coming thru and seems to also be missing from AS. Perhaps you could try again.

It's still there, but here it is again:

Attachment 6177

:)


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