material comes out from boden tube from behind of it

[roshan_ultimaker 0]

i have ultimaker extended 3d printer,from last 2 days,material is coming out from boden tube from back of it while printing and material stops flowing from extruder;i want to know how to fix it?i have tried to bind it with wire but it didn't work.

[SandervG 1,519]

Hello @roshan_ultimaker, thank you for your post and welcome to the community! The bowden tube is held in place by a coupler that has 4 small metal teeth in it that grip into the tube. Does your bowden tube surface look intact or does it look scratched? If it still looks fine you probably just need a new coupler that holds the bowden tube. 

 

Also make sure you still have the small horse shoe that is suppose to go under the coupler to keep the pressure up. If it went missing, that could also be the reason why your coupler lost grip.