Airgun Technologies AGT URAGAN MANUAL. FOUND

Any chance that any one here has had to replace the o-ring that leads to the fill port? I can’t figure out how to remove the air line (hose) on the front end, right up against the back side of the fill port. There isn’t enough room to get a wrench in the given space.
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Any chance that any one here has had to replace the o-ring that leads to the fill port? I can’t figure out how to remove the air line (hose) on the front end, right up against the back side of the fill port. There isn’t enough room to get a wrench in the given space.
View attachment 577167
Spark plug socket, or the deepest and thinnest 14mm socket you can find.


Basically something like this :
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