My question is the same. How much air pressure and what size air tank are you using. I have a wheel that tends to hang out a bit when retracted. All I have to do is roll inverted for a couple of seconds and the weight of the wheel pushes it right up into the wheel well and it locks. That is somewhat of a pain, but it works every time and I don't feel like pulling out the whole system and retract to check the up lock mechanism.
We usually run at least 100lbs of pressure in our retracts.
Good luck!
