Hey guys, I am having a problem replacing the o-rings on the shaft for the vane assembly. I have heated the evaporator tempeture to about 94 degs and 17.2 psia hoping that I would have a positive pressure and the shaft pull out easier, as I pull it sounds like something is hitting inside the housing. I've looked at the explosion veiw of the assy. and it does not show anything should be impeding the shaft. Is there a special tool for this or am I missing the obvious. any advise on this would be greatly appreciated.