Webasto Fuel Pump - Filter? In/Out?

[Jokani]

Hi,

I have read throught the instuctions a few times but I'm still not 100% on a couple of bit:

I think it come supplied with a filter attached to the pump. Do I need that as fuel will already be coming through a Racor 500FG 30 micron diesel fuel filter. It would be good if I could ditch the supplied filter as a straight through rather than 90 angle would make a more tidier installation, and 2 less conenctions.

Maybe another dumb question, but I'd rather be sure. From the manual I think I have identified the in and the out, but then I would have thought the supplied filter would have been before the inlet, rather than after the pump?

TIA

 

[mersey]

That's not a filter, it's a sound damper, to help reduce the clicking noise of the pump.

https://www.butlertechnik.com/insta...ater-fuel-dosing-pump-damper-kit-478814-p2665

I'd you want to do without it, pump noise will be greater.

 

[pvb]

From the manual I think I have identified the in and the out,

Yes, that looks right.

 

[pcatterall]

effectively through the 'filter' to the heater. You live and learn as I always assumed that it was a filter!

 

[lw395]

That's not a filter, it's a sound damper, to help reduce the clicking noise of the pump.

https://www.butlertechnik.com/insta...ater-fuel-dosing-pump-damper-kit-478814-p2665

I'd you want to do without it, pump noise will be greater.

I'd assumed it was to smooth the pulses from the pump, so the heater worked at a constant flame?

 

[lw395]

I put a little clear plastic inline filter before the pump. It traps any air, which keeps the heater happier.
It's reassuring to see it full of diesel if nothing else, and made bleeding the system easy.
Needs to be well away from anything hot obviously.

 

[Jokani]

That's not a filter, it's a sound damper, to help reduce the clicking noise of the pump.

I'm really please I checked, I'll keep it. Thank you.

Yes, that looks right.

Thanks for confirming, appreciated.

I put a little clear plastic inline filter before the pump. It traps any air.

Thanks for the tip.

 

[SiteSurfer]

Hi,

Do I need that as fuel will already be coming through a Racor 500FG 30 micron diesel fuel filter.

TIA

So, may I ask how you have done the connection to the fuel line? I assume from your description that you haven't used a dip tube on the tank.
I ask because I'm about to fit a heater and in my last installation was warned off tee'ing the fuel line and fitted a dip tube instead in the tank.

 

[Jokani]

So, may I ask how you have done the connection to the fuel line?

I may not be doing this the best way, but I feel, on balance it is best for me.

I am going to add another outlet from my Racor with a on/off lever so I can isolate it if necessary.

I do already have a free dip tube in my tank which I could use. But then i would need another fuel filter, and space is limited, it is another filter to maintain etc.

Maybe a seperate dip tube and filter is the way to go, I could easily be convinced.

 

[SiteSurfer]

I reckon that's a cool idea, I suppose the only possible drawback is that you could in theory run the tank out of fuel that way - with the dip tube which doesn't touch the bottom of the tank you have that reserve (as I understand the logic).

Personally - given the capacity and volume of the Racor I can't see either the engine or the heater suffering from lack of diesel - which was the other scenario I was told about.

 

[Keith-i]

If your Racor is under any negative pressure, say for example the engine pump is higher and sucks the fuel through this could cause fuel starvation to the heater if they are both running at the same time.

My Webasto pump, albeit much older, had a brass gauze at one end which is the filter. I added a small plastic fuel filter but have had no end of trouble trying to get it to prime so might go back to the gauze.