Fuel tank vent

The piece that is missing (in place of the vent plug) is a 2F3850 filter assy. This is the same unit used on the pony manifold and for some carb. vents. There is nothing magic about it except it has a filter media. I have found a standard substitute from McMaster- Carr if your interested. I'll look it up.

McMaster part #2257K11

Thanks Old Magnet....I looked up the part # you have listed but I guess I should have been more clear on what I have. There is a Regular NPT pipe plug installed in the bung. The tube is loose except for the top in the cap. How would you attach the tube to the vent and it not leak fuel ? Do I even need the tube ?
BTW...I have the Speedy-Sleeve on the shaft and two new bushings installed in the 44 hydraulic tank.
Your help is greatly appreciated ............Bill

OK, seems like the tube has detached itself (broken?) at the bottom. That's probably why the plug was installed. Yes. you need a vent of some sort or you will pull a suction on the tank and flow will stop. Other models have hole and filter media in the cap itself.

Old Magnet......I have been searching for a fitting I could adapt to attach the tube to but have had no luck. is there a drawing where I can see how and what the tube was attached to ? MAybe a picture. I really don't want to drill out and install a breather in the cap.
Thanks............Bill

No drawing that I know of.....look into what they call "bulkhead fittings". I think one of those could be made to work.