You need to find a gunsmith.
--------------Correct answer-----------Gunsmith's don't usually work on air guns Air gun repairmen do.-----------------
Crosman has all their air gun /rifle manuals online. the model 66 was made in 4 different variations. See the link below and you will find your model 66 about 1/2 way down the list. The list has both the owners manual and parts diagram.
See the link Below
pull back the trigger and aim!
You take a gun, you load the gun, you pull the hammer back, and you pull the trigger....its that simple
any dart gun has to have some kind of power to shoot the dart. this power comes either from springs or compressed air. with springs, when you cock back the gun it pulls back whats called a plunger. once you pull the trigger, the plunger is released and pushes air out of the gun, thus shooting the dart. with a compressed air gun, a pump is used to build up PSI (pounds per square ince) in an air tank. once its full, pulling the trigger releases a strong berst of air that propells the dart
Crosman has all their Air gun manuals online see the link below and find your model. The list has both the Owners Manual and Parts Manual.
my balls
If you are asking about the Crosman 3756. Single action is, you pull the trigger and Hammer pulls back and fires. All in one action. OR in double action you pull the hammer back and then pull the trigger to fire the gun. The gun can be fired either way single or double. Target shooters like to use the gun in double action, this removes some of the pressure on the trigger by pulling the hammer back manually, its easier to release the hammer with the trigger already cocked. You can get a better aim in this way. Pulling the trigger in single action causes you pull down with the gun and off your target..
When you pull the trigger the hammer (which was cocked back before) is released and it hits the primer on the cartridge which sets off the powder in the cartridge, and the bullet is propelled forward.
Look at the back of the breech. If there isn't a hammer, it's hammerless. Hammers are those things that stick up at the back of the barrel. On a single action gun you have to cock them (pull them back) before you pull the trigger. Pulling the trigger cocks and releases the hammers on a double action. All the firing mechanism is inside a hammerless gun.
Alan's finger was on the gun's trigger.
It all depends on the model and who made the pellet gun. I suggest that you re-post the queston with the model and make of the pellet gun to get an answer.
To load a caulk gun, first pull back the rod at the back of the gun. Insert the caulk tube into the gun with the nozzle facing forward. Push the rod back in to secure the tube. Squeeze the trigger a few times until caulk comes out of the nozzle.
one trigger sets the gun to go off and the other fires it you must squeeze the first trigger then the second to fire the gun and if your not careful and pull the set trigger again instead of the second trigger the gun will not fire plus the second trigger being the fire trigger is usually a hair trigger meaning you barely have to pull it to make the gun fire