I would have said the same however from the pic he has split the marker open and the leak is not coming from anywhere close, of course the next point of call was to ask if the leak was louder once the bolt was removed (rammer or ultimately the housing face) however the since the frame and body and have been separated and its from the frame (as he describes) then its either hoses or the noid, the rings are cheapest ans easiest to try so i would have to suggest to start there if not the hosing itself, failing that as mentioned before a new noid.Try changing the #9 oring on front of rammer, and the #11 oring on back of rammer.
I would say he took the frame off. Split the marker open sounds a little extremeI would have said the same however from the pic he has split the marker open and the leak is not coming from anywhere close, of course the next point of call was to ask if the leak was louder once the bolt was removed (rammer or ultimately the housing face) however the since the frame and body and have been separated and its from the frame (as he describes) then its either hoses or the noid, the rings are cheapest ans easiest to try so i would have to suggest to start there if not the hosing itself, failing that as mentioned before a new noid.
I cant remember the crack with the 07 noids but from memory they are easy to fix (well try to) failing that there are million and 1 plannet techs that frequent this forum so he will be in safe hands
I would say he took the frame off. Split the marker open sounds a little extreme
The hole in the pic where the OP circled, looks like the excess air release.
With the marker air'ed up, the rammer in the back position, there will be pressure between the front #9 oring on the rammer and the #11 oring back of rammer (pushing rammer in back position).
If the #11 oring on back of rammer is damaged or possible dirt on the rammer, this would cause air to leak out behind the rammer and out through the excess air release valve.
If this is an intermitten problem, then its possible theres some debris/dirt inside rammer housing.