Airbrush normal problem 2 : When Airbrush can spray air,pls check if the needle loosen.

When Airbrush can spray air,but can’t spray paint,pls check if the needle loosen.
How to check it?
Needle chuck loosen,when trigger pull back,just needle chuck go back,needle can’t go back.
Lock needle chuck,when trigger pull back,both needle chuck and needle go back!
If needle chuck loosen,needle can’t go back,needle will block nozzle,paint can’t spray out.when you lock needle chuck,needle go back,airbrush spray paint via gap between nozzle and needle.