I just purchased a 2009 TK100, which is New Hollands crawler. I am having a problem with the hydraulics. There are 3 pair of female couplers and I found out that this new hydraulic coupler does not have a sleave that slides back like the old hydraulic lines do, they just snap in, and to uncouple them you just pull them out. We are trying to use the old lines that are on my disc. It appears as if the male end of the old lines do not go in far enough into the females on the tractor. Do I have to replace the old type with a new type?