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Regulator installation guide BT65/AT44/FX/S200/P10/P12
You are working on a high pressure rifle; this could potentially be harmful
to you or bystanders if you do not know what you are doing.
Do not attempt to install this regulator yourself if you do not have a clear
understanding of how these pcp rifles and regulators work.
Installation and operation is done completely at your own risk.
Installing this regulator might void your rifle's factory warranty.
We cannot be held liable for any accidents in relation to this regulator and its
installation.
Before you start, make absolutely sure that ALL the air is drained from the pressure
tube. If there is a pressure gauge, it will give you just an indication. Dry fire the rifle to
make sure all the air is out of the rifle.
Method 1:
Drain the pressure tube/air cylinder completely by dry firing or opening the valve,
Remove the pressure tube/air cylinder from the action of the rifle,
Check that the air has been completely drained by pressing on the cylinder valve,
Unscrew the valve body from the pressure tube/air cylinder,
Remove the large 0 ring from the valve body and tighten the firing valve screw completely,
Make sure the valve body and threads are clean and free of grease and oil,
Before you you start, realize this;
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Table of Contents
Summary of Contents for Huma-air bt65
- Page 1 Regulator installation guide BT65/AT44/FX/S200/P10/P12 Before you you start, realize this; You are working on a high pressure rifle; this could potentially be harmful to you or bystanders if you do not know what you are doing. Do not attempt to install this regulator yourself if you do not have a clear understanding of how these pcp rifles and regulators work.
- Page 2 Make sure the inside of the pressure tube has no scratches or dirt inside it, Lightly grease the first 7 cm of the pressure tube with silicone grease, Carefully push the regulator into the pressure tube as shown in the picture below, Make sure the O-rings are properly seated in the grooves on both sides of the shim/spacer, Slide the shim/spacer into the pressure tube behind the regulator that you have already fitted.
- Page 3 If you notice the power spikes every few shots it means that the regulator is not venting/breathing enough/properly. Check that the threads of the pressure tube and valve body are clean and free of grease, also make sure the valve body is not screwed too tightly into the air cylinder.
- Page 4 Following your mark on the valve body, file a small groove in the longitudinal direction of the screw-thread of the valve body. Use the corner of the file to cut a 45 degree/triangular groove in the threads, as shown below, Note that the O ring groove does not get damaged by doing this modification.
- Page 5 Put some soapy water on the edge of the valve body/pressure tube and blow (with your mouth) into the fill port end of the cylinder, If the air duct just created is functioning properly, there will be air bubbles visible when you blow.
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