Mopar redesigned the hose at some point due to leaking. I had the same problem and a new o ring did not solve the problem. They redesigned the fitting that holds the hose to the pump. It's fairly easy to replace, took me less than an hour to do. If you do replace the hose make sure to bleed the system before driving.
My Jeep: 2001 Grand Cherokee Limited, 245/65R17 Falken Rocky Mountain ATS, K&N drop in air filter, Bilstein HD's. De-badged, eagle-eye LED Tails & LED 3rd brake light, Addco front and rear sway bars, Superchips tuned & TM snip, interior 6k LED's, Gen3 ccfl projectors with Volt 6k HID lows, akebono brake upgrade with R1 Concepts premium rotors.