Fuel Pump Assembly Question - Wrist Twisters
 
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post #1 of 11 Old 08-11-2019, 05:32 AM Thread Starter
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Fuel Pump Assembly Question

I am swapping on another tank on my 919 (taking my temp tank off and putting a repainted tank on) and in order to keep the downtime to a minimum (and fix my non-functional low fuel warning light) I am going to install a spare salvaged fuel pump assembly into the tank prior to install. However, I think the arm that holds the sensor may have gotten bent a bit in storage.














I tried to look in my existing tank setup with an endoscope but the gasoline breached the seals and killed it.



Is the little roller on the end of the wire arm supposed to make contact with any part of the tank, and if so, where? Is there any sort of spec for how low that sensor is supposed to sit? Thanks.

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post #2 of 11 Old 08-11-2019, 05:57 AM
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Well your in luck. I just pulled a old working unit out of my tank and replaced with a new OEM unit. Neither units touched the tank inside with the level probe sensor thingy.
I have the older unit, by unit I mean the whole thing like what you took a pic of, in my shed. I can take a few pics if you like to show the angle of the sensor arm. The angle was identical with both old and new units. I checked before shoving the new unit into the tank.
I'd say yours looks a little bent.

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post #3 of 11 Old 08-11-2019, 06:36 AM Thread Starter
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Originally Posted by Islandboy View Post
Well your in luck. I just pulled a old working unit out of my tank and replaced with a new OEM unit. Neither units touched the tank inside with the level probe sensor thingy.
I have the older unit, by unit I mean the whole thing like what you took a pic of, in my shed. I can take a few pics if you like to show the angle of the sensor arm. The angle was identical with both old and new units. I checked before shoving the new unit into the tank.
I'd say yours looks a little bent.

If you get a chance to get those pictures I'd appreciate it, thanks.

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post #4 of 11 Old 08-11-2019, 04:47 PM
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Here are some pics. I can take more pics or measurements if it helps.
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File Type: jpg 20190812_083659-1_1565563595625.jpg (101.9 KB, 8 views)

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post #5 of 11 Old 08-11-2019, 08:50 PM Thread Starter
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Yeah, I think the measurements would be extremely helpful. Thanks.

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post #6 of 11 Old 08-11-2019, 09:24 PM
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OK see if this gets you in the ball park.
When looking down onto unit the sensor is 130mm from that central bar on the fuel pump mount. See first pic.
Now the second pic shows that the sensor is pretty much at the same level as the fuel pump mount base.
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post #7 of 11 Old 08-11-2019, 09:27 PM Thread Starter
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Got it, thanks. Any idea what the roller on the end of the arm is for?

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post #8 of 11 Old 08-11-2019, 09:58 PM
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I was thinking about that roller. I think it's to stop the metal arm from contacting the base of the tank. But it would allow the correct distance to be maintained if arm did contact, without metal to metal. It's just clear of the base.

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post #9 of 11 Old 08-13-2019, 02:45 AM Thread Starter
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Is there any chance I could get a measurement of the distance between the fuel pump mounting flange/base and the sensor on the arm? Thanks.

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post #10 of 11 Old 08-13-2019, 03:28 AM
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There's a chance.
From the furthest edge of the sensor to the closest edge of the fuel pump mount base is 255mm. The pic shows where I took measurement from. I took an accurate measurement when I wasn't juggling tape and phone.
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post #11 of 11 Old 08-13-2019, 06:17 AM Thread Starter
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Quote:
Originally Posted by Islandboy View Post
There's a chance.
From the furthest edge of the sensor to the closest edge of the fuel pump mount base is 255mm. The pic shows where I took measurement from. I took an accurate measurement when I wasn't juggling tape and phone.


Thanks much, that should help me bend this thing back in place.

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