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Messages - nssc

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Engines / Re: Lister SR2 fuel filter
« on: October 05, 2021, 03:13:17 PM »
Seems to be fairly standard practice on narrowboats, the first one in line they refer to as the primary and allegedly acts as a water separator too. The one attached to the engine comes after the fuel pump and is also the bleed point. Belt and braces perhaps, or maybe mucky diesel is a thing on UK canals.

I'll check out the Loctite stuff, thanks, though I'll leave the banjos just with the Dowty washers.

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Engines / Re: Lister SR2 fuel filter
« on: October 04, 2021, 04:14:42 PM »
Quick update - this is a shared narrowboat and the hive mind decided to buy two new filters complete. I'm probably going to do the job next week. Thanks for your help cobbadog - your input helped convince them. I've also ordered some Dowty washers for the banjos.

Now my question is what's the best thread sealer for diesel fuel lines? There seem to be a few options, and I've been warned off ptfe tape by a BSS examiner. Back in the day I'd use red Hermatite (sp?) but that was really a liquid gasket rather than a thread sealer, and I seem to remember it needed to be warm to cure. One of the filters - the primary - is bolted to a bulkhead, away from any engine heat.

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Engines / Re: Lister SR2 fuel filter
« on: September 24, 2021, 09:16:11 AM »
I've found a drawing of the fuel filter internals and it shows that both my units have parts missing, namely the internal spring and washer which I assume is to keep the filter cartridge pressed up against the inner "O" ring. These filter assemblies were both fitted by a boatyard here in the UK, one which we'll never use again. I've attached the drawing in case it's of interest/help to anyone else.

Many thanks for your help on this cobbadog.

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Engines / Re: Lister SR2 fuel filter
« on: September 23, 2021, 01:17:23 PM »
That's really helpful, thanks - especially about there being more "O" rings than needed! The leak was from the large "O" ring that the bowl seats against. Whoever fitted it hadn't seated it properly in its groove and one side was crushed. I replaced the "O" ring and now the leaks have stopped.

I'm still unsure which way the filter cartridge is supposed to sit in the bowl. The centre holes are different sizes, and I don't know which is the top (see the pictures - I hope). And is there supposed to be a steel washer on the centre bolt as well as the rubber "O" ring?

Many thanks for your help.

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Engines / Lister SR2 fuel filter
« on: September 22, 2021, 03:55:18 PM »
Hi all,

I've just got a share in a narrowboat fitted with a Lister SR2 engine. There are 2 fuel filters as per the picture attached, but I'm not convinced the filter cartridges and/or "O" rings have been replaced correctly - there has been a deal of leakage, both of air in and fuel out. Does anyone have a definitive drawing of the internals, please? I think I can see where most of the "O" rings are supposed to fit, but I'd like to be certain, and I'd also like to be sure I have the paper cartridge in the right way round, as they're different in the two filters. If it's not clear from the picture, the filters have the securing bolt fitted from underneath the bowl.

Thanks in advance,
Trevor

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