Fuel Tank Senders

[Buckeyechuck]

Anyone have any idea what type fuel sender is in the second photo?  I’m trying to install overhauled senders (first photo). Can’t get the senders that are in the tanks to come out.  They do not appear to be the original type. Logs say they were replaced in 1990.  Had bladders installed in 2002. Senders were reused. I’m afraid I will need to open the wing and bladder to get these out. 

[N201MKTurbo]

They went in, they will come out. Push 5hem in a bit and rock them down.

The one in the first pic is the old style, the second pic is the new style.

Opening the tank won’t help. 

[Buckeyechuck]

Ok. We were hesitant to use any force.  Didn’t want to damage the bladders.  Forcing anything on an airplane always ends up bad. 

[gmonnig]

12 hours ago, Buckeyechuck said:

Anyone have any idea what type fuel sender is in the second photo?  I’m trying to install overhauled senders (first photo). Can’t get the senders that are in the tanks to come out.  They do not appear to be the original type. Logs say they were replaced in 1990.  Had bladders installed in 2002. Senders were reused. I’m afraid I will need to open the wing and bladder to get these out. 

I had the same senders in my tanks. I removed them to install the newest magnetic ones. The sender needs to be rotated clockwise about a quarter turn. I do not have bladders but my pilot side had a similar issue. I think the float gets stuck on a rib. Reinstalling them is the same, put the float vertical so the arm doesn't fall to the bottom of the tank. Once the sender is fully in the tank, rotate it to the proper orientation so the sender arm falls to the bottom of the tank. Torque screws to 25in/lb, wait 30min and torque again. 

[M20F-1968]

You should get rid of the sender type that is in the first picture.  The newer ones are more reliable.

John Breda