The hammerli's cilinder doesnt have a return valve. When I fill it, than unscrew it fast, the pressure already dropped to 150/160bar. So I miss about 50% of my shots cause I cant use 50% of my filling.
How do yóu solve this with yr AP40's?
Filling >200bars isnt an option with the AP40..
filling hammerli AP40
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Filling Hammerli AP40
Hello,
First bear in mind that the Hammerli cylinders have a fine tread so handle them with care.
Second for your problem: I suppose you use the original adapter from Hammeli, the one with a screw on the side, because they also sell aluminum adapters that don't have that screw. With this last adapter it is very hard to unscrew the the cylinder. In fact I ruined my cylinder with the alu adapter.
When using the original brass adapter: after having filled from a scuba tank or with a hand pump UNSCREW the valve on the adapter first. Only a little amount of air will escape, then unscrew the cylinder.
It is absolutely normal that some pressure is lost when unscrewing the cylinder and fitting it on the pistol, but the amount should be insignificant.
Hoping to have been of some help.
Guy
First bear in mind that the Hammerli cylinders have a fine tread so handle them with care.
Second for your problem: I suppose you use the original adapter from Hammeli, the one with a screw on the side, because they also sell aluminum adapters that don't have that screw. With this last adapter it is very hard to unscrew the the cylinder. In fact I ruined my cylinder with the alu adapter.
When using the original brass adapter: after having filled from a scuba tank or with a hand pump UNSCREW the valve on the adapter first. Only a little amount of air will escape, then unscrew the cylinder.
It is absolutely normal that some pressure is lost when unscrewing the cylinder and fitting it on the pistol, but the amount should be insignificant.
Hoping to have been of some help.
Guy
-
AP40
-
yana
Oh, I forgot, I unscrew the cilinder from the adapter. The adapter is on the scuba directly. When I use a fill set between it, with a hose, (which I usually do cause many gun manometers arent reliable), its empties fully upon bleeding air from the fill set.(it empties with the fill set) So I concluded it doesnt have a return valve.
Filling Hammerli AR40
Too bad you're stuck with the white adapter.
I can only advise you to try to get a messing (yellow) type with the depressor screw. You can try if Umarex still sells them, but I doubt it.
A possibility could be if you show the silver adapter to a precision mechanic that he can modify the adapter.
My guess is that he should drill out the cylinder site of the adapter deep enough so you can screw the cylinder on the adapter without it loses air. and drill a hole in the adapter that can be shut off with a screw. Or if you always use a hose for filling then that screw wouldn't be necessary as the screws of the hose will take the load.
It may sound messy, but it is actually fairly easy to do.
Good luck.
Guy
I can only advise you to try to get a messing (yellow) type with the depressor screw. You can try if Umarex still sells them, but I doubt it.
A possibility could be if you show the silver adapter to a precision mechanic that he can modify the adapter.
My guess is that he should drill out the cylinder site of the adapter deep enough so you can screw the cylinder on the adapter without it loses air. and drill a hole in the adapter that can be shut off with a screw. Or if you always use a hose for filling then that screw wouldn't be necessary as the screws of the hose will take the load.
It may sound messy, but it is actually fairly easy to do.
Good luck.
Guy
Filling Hammerli AP40
Sorry Spencer, but are you sure that that adapter will fit the Hammerli cartridge? I don't think so. If you look a little further down de web page Walther shows the aluminum adapter as well, specifying that is for Hammerli AP40. That's the one that cause all the troubles.
I have both adapters and the important difference is the depth of the cylinder entrance.
In my opinion: that's where all the problems come from.
Regards.
Guy
I have both adapters and the important difference is the depth of the cylinder entrance.
In my opinion: that's where all the problems come from.
Regards.
Guy
-
yana