*Thanks to Michael Wendt for the photos.
To share my experience tuning the .30 Uragan: I first bled off the pressure. I don’t have a manual and I’m not sure if there is a better way to bleed down, such as a degas tool. I do not have a degas tool for the Uragan like I do for my Vulcans. I cracked open the fitting at the high pressure hose and let it bleed down. Again, just crack it and let it bleed down. Once all pressure is bled, then take the fitting completely loose as pictured.
This bleeds the unregulated high pressure air to zero, however, the regulated air in the action still remains. You will not be able to disassemble further without degassing the action. I dry fired a few times which lowered the remaining pressure enough to allow the hammer spring tension to open the firing valve, thus dumping the pressure completely.
At this point, it’s time to remove (22) to gain access to the regulator. I used a pair of needle nose pliers. The fitting is fairly tight and as Wendt previously suggested, protecting the threads with some tape is a good idea.
From here, I found it best to remove the regulator from the action. I used a M4x14 screw that threads into the brass adjuster (42). Beneath the 4mm hex are threads to facilitate threading in the screw to (42).
I then used needle nose pliers to grab the screw and gently pull the regulator out. At this point, mark the jam nut (75) and the adjuster (42). Think of the marks made in terms of being 12 o’clock on a clock face, at least this helps me. I am lowering reg pressure so I slightly loosen the jam nut and hold in place while using a 4mm allen to turn the adjuster (42) clockwise “5 minutes” to12:05, thinking of the mark made on the adjuster as the minute hand. I then locked the jam nut back down, lightly snugging it up. There are flats on the reg body to hold back-up while snugging the jam nut. Make sure the adjustment made remain and didn’t turn.
Now I carefully reassembled using a bit of silicone grease on the o-rings. Cock the gun and slowly fill. Once your pressure is over 120 bar or so you can de-cock as the firing valve has enough pressure behind it to remain closed. I filled to 200 bar and tested. I first backed off on hammer spring tension (HST) about 2 turns (be sure to first back off the set screw for the HST adjuster). Shooting over the chrony I fed in 1/4 turn increments of HST watching speed rise on every shot until I found the plateau or max speed at this reg setting. It was 903 fps. When I dialed 1/4 turn more HST the speed dropped to 895 fps and then another 1/4 turn more made 886 fps. 1/2 turn less HST took me back to 902 fps. My target was 890 fps which I found by backing off another 1/2 turn. From here, I filled to 250 bar and tested further. All setting were good and I tightened the HST adjuster’s set screw. BTW, max fill is 300 bar. I choose to only fill to 250 bar max.
The results of this adjustment: I dropped the reg pressure from 150 bar to 140 bar. I know this by observing, while shooting a string over the chrony, the point at which the speed drops off. I know that this is when I’m coming off the regulator. I then begin to refill the gun very slowly and note the pressure at which the gun begins to take air. This is your approximate reg setting. So, at least with this .30 Uragan, “5 minutes” of adjustment equaled 10 bar and took plateau from 918 fps to 903 fps. Once I lowered speed with HST to 890 fps, these adjustments gained me another 7-8 shots on a fill and quieted the report a bit.
To share my experience tuning the .30 Uragan: I first bled off the pressure. I don’t have a manual and I’m not sure if there is a better way to bleed down, such as a degas tool. I do not have a degas tool for the Uragan like I do for my Vulcans. I cracked open the fitting at the high pressure hose and let it bleed down. Again, just crack it and let it bleed down. Once all pressure is bled, then take the fitting completely loose as pictured.
This bleeds the unregulated high pressure air to zero, however, the regulated air in the action still remains. You will not be able to disassemble further without degassing the action. I dry fired a few times which lowered the remaining pressure enough to allow the hammer spring tension to open the firing valve, thus dumping the pressure completely.
At this point, it’s time to remove (22) to gain access to the regulator. I used a pair of needle nose pliers. The fitting is fairly tight and as Wendt previously suggested, protecting the threads with some tape is a good idea.
From here, I found it best to remove the regulator from the action. I used a M4x14 screw that threads into the brass adjuster (42). Beneath the 4mm hex are threads to facilitate threading in the screw to (42).
I then used needle nose pliers to grab the screw and gently pull the regulator out. At this point, mark the jam nut (75) and the adjuster (42). Think of the marks made in terms of being 12 o’clock on a clock face, at least this helps me. I am lowering reg pressure so I slightly loosen the jam nut and hold in place while using a 4mm allen to turn the adjuster (42) clockwise “5 minutes” to12:05, thinking of the mark made on the adjuster as the minute hand. I then locked the jam nut back down, lightly snugging it up. There are flats on the reg body to hold back-up while snugging the jam nut. Make sure the adjustment made remain and didn’t turn.
Now I carefully reassembled using a bit of silicone grease on the o-rings. Cock the gun and slowly fill. Once your pressure is over 120 bar or so you can de-cock as the firing valve has enough pressure behind it to remain closed. I filled to 200 bar and tested. I first backed off on hammer spring tension (HST) about 2 turns (be sure to first back off the set screw for the HST adjuster). Shooting over the chrony I fed in 1/4 turn increments of HST watching speed rise on every shot until I found the plateau or max speed at this reg setting. It was 903 fps. When I dialed 1/4 turn more HST the speed dropped to 895 fps and then another 1/4 turn more made 886 fps. 1/2 turn less HST took me back to 902 fps. My target was 890 fps which I found by backing off another 1/2 turn. From here, I filled to 250 bar and tested further. All setting were good and I tightened the HST adjuster’s set screw. BTW, max fill is 300 bar. I choose to only fill to 250 bar max.
The results of this adjustment: I dropped the reg pressure from 150 bar to 140 bar. I know this by observing, while shooting a string over the chrony, the point at which the speed drops off. I know that this is when I’m coming off the regulator. I then begin to refill the gun very slowly and note the pressure at which the gun begins to take air. This is your approximate reg setting. So, at least with this .30 Uragan, “5 minutes” of adjustment equaled 10 bar and took plateau from 918 fps to 903 fps. Once I lowered speed with HST to 890 fps, these adjustments gained me another 7-8 shots on a fill and quieted the report a bit.
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FYI, this gun came from Europe and not a local dealer.
