I have a 'new' used vacuseal 4468, it is not drawing a vacuum through the manifolds in the bladder. Im in need of advice and or a diagram of the internal vacuum lines. There are 2 vacuum lines coming out of the press, one on the rear right, the line was pulled out, and another line coming out of the middle back, there is also a vacuum line fitting on the rear left. I have tried attaching the pump to all three lines, yet the manifolds in the bladder are not sucking air. The pump works fine. Desperately need advice and or drawing of the vacuum lines and how to access them. I have the manual but there are no diagrams of the vacuum lines. Thanks in advance for any help.