Been trying to get this BB 727 together, 1st build as I mentioned in a previous post. I'm just not happy with the "air check" on the front pack. I've tried it just on the pump & now twice bolted together. I just pulled it apart & changed the inner seal on the pack again. Lips are down.
At about 35 psi the rear pack has a good "thump" & then bleeds down. Now the front does have an okay "thump" but holds absolutely no pressure. It comes out as fast as it's going in. Tried to take a video of the "air check". Never tried to video with the phone before.
I did replace the complete pump (rebuilt unit) with the hopes it was just something there but no luck.
Would you tear it back down or close it up & hope it's ok?