THE WORLD LEADER IN HIGH-PERFORMANCE PARTS FOR CROSMAN & BENJAMIN AIRGUNS
22XX MAGNUM ADJUSTER INSTALLATION
Discovery, Maximus, Challenger, 2260 and Fortitude follow steps 1—4
2240, 2250, 2300 series, 2400KT, Marauder Pistol, 1701P & 1720T follow steps 2-4
MAKE SURE GUN IS UNLOADED, UNCOCKED AND EMPTY OF PRESSURE BEFORE REMOVING OR INSTALLING PARTS
1 ) There’s a spring-wire behind the trigger you need to pull forward with a pick to be able to pull out the safety button. Take the stock-screw out and wiggle the stock off if it doesn't come off easily. The rifle adjusters require a 3/8" long rear trigger frame screw. Any shorter may strip the threads on the screw or adjuster, any longer will hit the threads on the adjuster knob. A 3/8" alloy socket-head screw is included, it requires a 3/32" hex wrench (not included) to install.
2 ) Remove the rear trigger frame and rear breech screws. Remove the tube plug which is where the adjuster will mount. It usually falls or lightly ejects out if you don't hold it while removing the screws.
Install the threaded tube-plug part of the power adjuster with the threaded knob removed. Install the mounting screws, don't tighten either all the way until both are threaded in fully.
Place the hammer spring on the guide at the tip of the threaded adjuster knob. Make sure the spring goes into the back of the hammer as you thread the knob into the tube plug.
If you turn the adjuster knob too far in, the hammer will not pull back far enough to catch on the sear. Adjust to full spring compression with the gun cocked, stop when you feel the spring is fully compressed, do not force it further. Back the adjuster out two full turns, this is about the tightest setting that works smoothly in most cases. This would be the full-power setting for guns converted to HPA or PCP with pressures higher than CO2. For CO2 or low pressure (below 1000 PSI) set spring tension to the minimum needed for the power level to peak. There's a valve-stem rebound effect that can cause power loss and/or wasted CO2/air if too much spring tension is used at low pressures. This is very common with CO2 models, especially at lower temperatures where CO2 produces lower pressure.
3 ) With a power adjuster, custom valve or stronger hammer spring it’s typical to have to cock the gun to get the valve to seal so it can be pressurized. Once pressurized this shouldn’t be necessary for refills so long as there’s pressure left.
4 ) The more striker spring tension you have the harder it becomes to pull back the bolt. With a heavier spring, especially if using a power adjuster, the bolt will pull back easier with your finger hooked around the front of the handle close to the breech. If done in one quick motion the bolt will pull back smoothly. If done slow or holding the handle further away from the breech the bolt may tend to bind or work rough.
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