Author Topic: Removing (and refitting) the fuel level sensor  (Read 196 times)

Lyra

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Removing (and refitting) the fuel level sensor
« on: December 03 2018, 16:22 »
I have a case of diesel contamination.
So I intend to "polish" it by circulating it through a set of filters.
Got a 70L/min pump. Since the pump ports are 3/4" it will not be correct to try to draw the fuel through the regular, small diameter, outlet line as this will not be able to provide the required flow for the pump. I would also like to agitate the tank contents as much as possible so will use  3/4" hoses.
Therefore I would like to open the fuel level sensor fitting and draw the fuel from there (I will push it towards the lowest part of the tank and pour it back through the fuel filling deck fitting).
Any thing special to look out for when opening and removing the sensor (special gasket that may need replacement if opened? etc.).
S/Y Lyra
B36 / 2004

Yngmar

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Re: Removing (and refitting) the fuel level sensor
« Reply #1 on: December 03 2018, 21:05 »
Looks like mine. I've had it out. It was an absolute bastard to get the sensor out and back in. Luckily you don't have to!

For what you want to do, simply disconnect the cables, undo the screws and lift the sensor out far enough so you can hang your suction hose down there, parallel to the narrow bit of the sensor. This will be easy.

Finding the exact spot and angle where you can extract the sensor arm without bending or breaking it was quite tricky (although this may depend on how generously the hole was cut originally). Plenty of room for a thick hose and the sensor though.

Sailing Songbird (Blog & YouTube)  ⛵️ Bavaria 40 Ocean (2001)

dawntreader

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Re: Removing (and refitting) the fuel level sensor
« Reply #2 on: December 04 2018, 07:19 »
Not sure if this is relevant as the sensor set-up looks slightly different to mine. However, when I removed my sensor for replacement some time ago the sealing washer had expanded and, once the sensor unit was removed, would not fit back. I then had to source another one before I could refit it  :-\

Lyra

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Re: Removing (and refitting) the fuel level sensor
« Reply #3 on: December 04 2018, 10:13 »
Thanks to both of you.

Dawntreader - when you say that your setup is different, did you refer to my picture of the flange connection or to Yngmar's photo of the sensor internal structure?

Also - is there one sealing washer or two?
S/Y Lyra
B36 / 2004

dawntreader

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Re: Removing (and refitting) the fuel level sensor
« Reply #4 on: December 05 2018, 07:52 »
Lyra,
My original float & lever sensor failed and Bavaria sent me a replacement - a 'tube' with an integral pcb/float. The wiring colour was different too  ::). Unfortunately I do not have a photo of the internal sensor, just the external part. There is a black rubber-type washer under the flange.

Lyra

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Re: Removing (and refitting) the fuel level sensor
« Reply #5 on: December 05 2018, 10:40 »
Thanks.
Just in case I will need it in the future I looked it up the ROAD site - it is a KTS capacitive level sensor (number on the first line is the manufacturer part number)
S/Y Lyra
B36 / 2004

buttonfreebie

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Re: Removing (and refitting) the fuel level sensor
« Reply #6 on: December 05 2018, 17:58 »
I eventually discovered that to remove the sensor is easy if you push the float into the position it would be in if there was no fuel in the tank. Also I discovered that the gasket only fits correctly in one position . Mine was leaking and the last person to refit it had the gasket incorrectly lined up .