Hydraulic Fitting Specs:     Adding the blower into a circuit will require some hydraulic connections.  To prevent leaks it is best to use the appropriate torque on connections.  Note that too much torque can damage fittings and cause leaks just as too little can fail to seal.  Case IH kits use 3/4", 5/8", 1/2", and 3/8" fittings.  The industry refers to these by a number, or "dash" size.  This is actually the number of 16ths of an inch for the inside diameter of the hose.  So the large 3/4" hoses have #12 fittings, while the small 3/8"  drain line is a #6 hose.   The John Deere kits use #8 hoses.  The hoses in all kits are JIC flare fittings on one end and O-Ring Face Seal on the other.  Motor and valve faces use O-Ring Boss fittings but these should be assembled when received.  Here's a useful link for the torques for fittings you will assemble.  Here's another useful link for JIC flare fittings that offers an alternative the doesn't require torque values.