Ok, I was able to get the regulator installed into the Royale 400. .22 caliber today. It is very simple to do.
First was to remove the scope and rings from the rifle. Next was removing the action from the stock. Mine has the removable tank so it just a simple unscrew from the action with hand pressure. It hisses a little but seals itself up once removed. Now it's time to remove the fill nipple and after that is off I could remove the tube receiver to get to the inside of the breech block where the regulator will be installed. Inside along the threads there is a plastic spacer that needs to come out before the regulator can be installed. This plastic spacer does not get put back in the rifle with the regulator, it stays out.
Now I needed to remove the air pressure gauge. After removing the gauge, there was a 2mm hole already started in the breech block. It does not go all the way through (maybe 75%) and it needs to be drilled all the way. I rolled up some napkins and stuffed them inside the space that was exposed after removing the tube receiver where the plastic spacer was that I removed. I did this to catch any metal shavings on the inside of the gun when drilling the hole through. I also put a piece of blue tape over the hole where the air pressure gauge is to keep metal shavings out of there too. I chucked up a 2mm drill bit into a drill press and dropped a drop of oil on the hole and the bit to help it cut. I made sure that I was drilling the hole square and straight and then drilled the hole.
After the drilling was completed the metal shavings were blown off and the outside of the breech block wiped off. I removed the napkins that were stuffed in the block and then I took some 400 grit sandpaper and very lightly sanded the inside where the new hole was just drilled to remove any burr that may have been on the edges. I did this using a dowel wrapped with a napkin (for padding like on a finger tip) and a piece of sandpaper wrapped over that. Using that was smaller and easier than using my finger. I cleaned the inside of the hole out of any sanding dust. I used my bare finger to feel around the inside for any burr that may damage the o-ring seals on the regulator that is getting installed.
Next was to install the regulator. I applied some silicon grease to the two O-ring seals exposed on the regulator and a thin coat inside the breech where it is being installed. I aligned the hole in the body of the regulator (between the two seals) with the newly drilled hole in the breech block and slid it in with the nut and washer end of the regulator going in first into the rifle. It went in then had a stop where the seal meets the inside of the block. I used gentle pressure from my hand and a slight wiggling to get it in there compressing the seals. It didn't take much and it goes in smooth. Push it all the way in there until you feel it seats firmly.
Next it was time to reassemble the rifle and try it out with the regulator installed. I installed the tube receiver and fill nipple then the air pressure gauge. Then the bottle went on and the action was mounted back in the stock along with mounting the scope back on the rifle.
http://www.fxairguns.com/wp-content/uploads/2015/10/Royal-Drawing-and-Partlist.pdf
http://www.fxairguns.com/wp-content/uploads/2014/03/Regulator-assembly.pdf
Being an un-regulated gun I saw a 30 fps ES and a 11 fps SD with the standard rise and fall of velocity (bell curve) over the fill of the tank. Now the regulated rifle is more consistent in shot to shot velocity where I see a 10 fps ES and a 3 SD with a flat shot string velocity. I have mine set to shoot JSB 18.1 grain pellets at 895 fps average for 70 shots on a 210 bar fill with the regulator set at 145 bar. I plan to tweak the regulator some and also play with the hammer spring tension. I turned the hammer spring down from 915 fps average to the 895 fps average that is out now. I may try turning the regulator pressure down and see if I can get more useable air for more shots over the fill of the rifle.
Anyway, overall I am satisfied with the regulator installed on this rifle. I prefer the consistent fps shot to shot over the rise and fall in fps of the un-regulated rifle. The install was super easy and took about a half an hour to do.
I hope this helps somebody!
First was to remove the scope and rings from the rifle. Next was removing the action from the stock. Mine has the removable tank so it just a simple unscrew from the action with hand pressure. It hisses a little but seals itself up once removed. Now it's time to remove the fill nipple and after that is off I could remove the tube receiver to get to the inside of the breech block where the regulator will be installed. Inside along the threads there is a plastic spacer that needs to come out before the regulator can be installed. This plastic spacer does not get put back in the rifle with the regulator, it stays out.
Now I needed to remove the air pressure gauge. After removing the gauge, there was a 2mm hole already started in the breech block. It does not go all the way through (maybe 75%) and it needs to be drilled all the way. I rolled up some napkins and stuffed them inside the space that was exposed after removing the tube receiver where the plastic spacer was that I removed. I did this to catch any metal shavings on the inside of the gun when drilling the hole through. I also put a piece of blue tape over the hole where the air pressure gauge is to keep metal shavings out of there too. I chucked up a 2mm drill bit into a drill press and dropped a drop of oil on the hole and the bit to help it cut. I made sure that I was drilling the hole square and straight and then drilled the hole.
After the drilling was completed the metal shavings were blown off and the outside of the breech block wiped off. I removed the napkins that were stuffed in the block and then I took some 400 grit sandpaper and very lightly sanded the inside where the new hole was just drilled to remove any burr that may have been on the edges. I did this using a dowel wrapped with a napkin (for padding like on a finger tip) and a piece of sandpaper wrapped over that. Using that was smaller and easier than using my finger. I cleaned the inside of the hole out of any sanding dust. I used my bare finger to feel around the inside for any burr that may damage the o-ring seals on the regulator that is getting installed.
Next was to install the regulator. I applied some silicon grease to the two O-ring seals exposed on the regulator and a thin coat inside the breech where it is being installed. I aligned the hole in the body of the regulator (between the two seals) with the newly drilled hole in the breech block and slid it in with the nut and washer end of the regulator going in first into the rifle. It went in then had a stop where the seal meets the inside of the block. I used gentle pressure from my hand and a slight wiggling to get it in there compressing the seals. It didn't take much and it goes in smooth. Push it all the way in there until you feel it seats firmly.
Next it was time to reassemble the rifle and try it out with the regulator installed. I installed the tube receiver and fill nipple then the air pressure gauge. Then the bottle went on and the action was mounted back in the stock along with mounting the scope back on the rifle.
http://www.fxairguns.com/wp-content/uploads/2015/10/Royal-Drawing-and-Partlist.pdf
http://www.fxairguns.com/wp-content/uploads/2014/03/Regulator-assembly.pdf
Being an un-regulated gun I saw a 30 fps ES and a 11 fps SD with the standard rise and fall of velocity (bell curve) over the fill of the tank. Now the regulated rifle is more consistent in shot to shot velocity where I see a 10 fps ES and a 3 SD with a flat shot string velocity. I have mine set to shoot JSB 18.1 grain pellets at 895 fps average for 70 shots on a 210 bar fill with the regulator set at 145 bar. I plan to tweak the regulator some and also play with the hammer spring tension. I turned the hammer spring down from 915 fps average to the 895 fps average that is out now. I may try turning the regulator pressure down and see if I can get more useable air for more shots over the fill of the rifle.
Anyway, overall I am satisfied with the regulator installed on this rifle. I prefer the consistent fps shot to shot over the rise and fall in fps of the un-regulated rifle. The install was super easy and took about a half an hour to do.
I hope this helps somebody!
