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Primary diesel filter leak

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S&J View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote S&J Quote  Post ReplyReply Direct Link To This Post Topic: Primary diesel filter leak
    Posted: 04 May 2018 at 17:58
Returned to the boat after a 6 month winter break to find almost 2 litres of diesel pooled behind the engine.  The source is the primary filter.






I know that there have been a couple of other posts about this and most seem to recommend replacing the AllPa unit with an alternative, however until I can find a suitable replacement, is there any way to reduce the fuel leaking?

Edited by S&J - 04 May 2018 at 17:59
H385 #351 Ningaloo UK south coast (2018)
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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 04 May 2018 at 19:28
I do not know about the Allpa unit but I had a similar problem with my CAV ( now made by Delphi) unit. Is the actual filter you have Allpa & the holding unit to a CAV? Or is the whole thing made by Allpa?

I had leaks & got annoyed when my cousin ( who works on various farms) called me a "spanner monkey".
he pointed out that there are thousand of CAV units in use & people change them on plant & machinery whilst up to their knees in mud with no problems.
He ended up by suggesting that I took a good look at the unit & check it was in fact a genuine CAV filter.

It was in fact a clone that Hanse had fitted

When I changed it for the real thing all leaks ended & I did not have to force the nuts tight. just a gentle nip of the bolt.
So may I suggest that you change the filter unit for a genuine CAV/Delphi water trap primary filter. At least check you have a genuine unit.
I am assuming that the filter you are talking about is the water trap one!!!


Edited by samuel - 04 May 2018 at 19:30
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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sailkoop View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sailkoop Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2018 at 09:44
Move forward to a Separ Filter. Their you exchange the Filter on the Top, not on the Bottom!! Less trouble and less Diesel in the Bilge....
best regards

Bjoern

http://www.sy-serafina.de
Hanse 470e #165

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Kjell View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kjell Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2018 at 21:30
On our filter there is a rubber seal on the drainage tap. In the picture it appears to be missing.
Hanse 345 #124, Tuva
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Captain Cook Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 20:53
I had the same problem. I changed the filter without problems when the tank was full. When I filled the tank, several liters of diesel escaped down in the bilge. The diesel fumes annoyed me for years, even after having washed out the bilge with detergent.
The filter delivered from the marine store was designed for my 3JH4E, but it was two millimeters too short. I solved the problem by stacking 2 mm of washers under the bolt, but this year I will search for an filter element the right size.
Freya Hanse400#27
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SausalitoDave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SausalitoDave Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 02:18
On my 505 the bolt was so short that it only engaged two turns of the thread so it was quickly obvious it was not possible to get it tight enough to compress the washer.  Fortunately, I figured it out before more than a few cc's of fuel ended up in the bilge.  What can you say, other than it is a boat.  

Dave


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S&J View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote S&J Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2018 at 08:35
Thanks Kjell
I have used a fibre washer to stop the leak from the drainage tap.  So far it seems to be OK and is staying dry.
I will look for a replacement filter in due course.
H385 #351 Ningaloo UK south coast (2018)
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J&J View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote J&J Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2018 at 08:23
Had a similar problem and replaced with a racor spin on unit and haven't had any problem since the elements are more expensive but much faster to change and don't come undone
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