Blacksmith bellows

[azur]

Hello here is my bellows that i build for forge i have some issueswith it but they blow a litel bit in practice the top chamber need to inhale but it wont they work half.
Here are videos and images.

Here are pictures how they was made.
http://i59.tinypic.com/2qlsnb4.jpg
http://i59.tinypic.com/2qlsnb4.jpg
http://i62.tinypic.com/9ungbm.jpg
http://i57.tinypic.com/25jgl52.jpg
http://i57.tinypic.com/2zyjs3o.jpg
https://fbcdn-sphoto...75b615d5670ba5a
https://fbcdn-sphoto...b1057f8c67e6071
https://fbcdn-sphoto...54818efdb3fd1b5
https://fbcdn-sphoto...f6c460555d636c6
https://fbcdn-sphoto...0240c1ba01401b1