quick disconnect

Greetings folks, I recently bought a house and my kitchen faucet pull out hose started leaking a few days after closing. (joy of being a home owner) I've been trying to identify the faucet and could've sworn that it was a Kohler Mistos. Long story short the hose and quick release (1244504)...

Ok this might be a lengthy post but the picture pretty much explains my dilemma. I'm just baffled on how to free up and remove the pipe from the casing in this particular setup. I tried to upload a video but apparently the file is too big :/ Basically, the inner pipe with the pump...