I spotted several Jungmann fuel gauges for sale this week so I decided to check mine just to make sure it was repairable. With the help of Brian Karli I managed to get it apart without any damage. It looks like with a new spring and some seals it should be OK.
Here is what it looks like all together, these five are for sale at www.bucker.info
Unfortunately the guide tube came out in three pieces where the solder joints had failed. Should be an easy fix. Here are the three parts, the lower flange, the tube, and the upper spring retainer.
Overall it does not look too bad, a new spring , seals, and some solder should fix it right up. Suggestions/advice are always welcome at BR549JP@verizon.net