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Old 09/02/2015, 12:28 PM   #1
patnpat
 

Joined: Mar 03
Posts: 27

Fuel Gauge Sending Unit Lock Ring

I am replacing the fuel gauge sending unit on our GT/CS and have a question on tightening the lock ring. I first hand tightened the lock ring in place. I then used a large screwdriver and hammer to further tighten (some pretty powerful blows).

The “ears” on the gas tank are only about ˝ way up the “ramps” on the lock ring (see pictures). I am concerned that the ring could vibrate loose over time. I hesitate to tighten any more as I do not want to break the ears off the tank.

I am used to lock rings that tighten down and then “pop” in place and lock at the top of the "ramp". I have looked online for examples, and from what I have seen I think I am OK. Just don’t want to fill with gas and then leave it all on the street!

Thanks, Pat
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Old 09/02/2015, 01:40 PM   #2
franklinair
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Are you SURE the 'O' ring is in it's groove? (I had trouble with this, working upside down.)
When all was in place I was able to use a long screwdriver wedged between two of the lockring ears, and twist the lockring fully against the stops.

Neil
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Old 09/02/2015, 03:16 PM   #3
patnpat
 

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Hi Neil:

Yes, the "O" ring is in place. I used a little grease to hold it in place (per supplier recs). I first set the lock ring by hand, then removed the sending unit. the "O" ring stayed in place, then proceeded to re-install and lock it down.

Pat
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Old 09/02/2015, 05:00 PM   #4
CougarCJ
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Spaceman Spiff

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I use a brass drift for removing and installing the locking ring (no chance of spark).

Scott Behncke
1968 GT/CS 302-4V Honors flysis income beezis onches nobis inob keesis
West Coast Classic Cougar A good source for Mustang mechanical parts too.
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Old 09/02/2015, 09:32 PM   #5
dalorzo_f
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+1 on the brass, unless its a new and unused tank. Tap it to full seat against the stop.
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