CHRIS WHEN YOU HAD THE PUMP OFF THE ENG, AND REFILLED THE RESERVOIR , DID IT MAKE A GURGLING SOUNDS AS IT WAS REFILLING THE SYSTEM , I HAVE NEVER SAW A STEERING BOX JUST ALL OF A SUDDEN GO BAD , IF THE BOX AND PUMP WAS WORKING CORRECTLY YOU COULD BREAK THE STEERING STABELIZER CLEAN OFF , THAT BOX AND PUMP HAS A LOT OF PUSHING FORCE ,
TRY THIS GET A PAN UNDER THE TRUCK OR YOU WILL MAKE A MESS , PULL THE RETURN LINE FROM THE RESV, AND DRAIN IT DOWN AS MUCH A YOU CAN, NOW PUT IT BACK ON THE NIPPLE AND START THE ENG IT SHOULD IMMEDIATELY START FILLING THE RESV WITH THE FLUID THAT IS LEFT IN THE SYSTEM BEING PUMPED BACK INTO THE RESV, AND AT THE SAME TIME MAKE A PRETTY NOTICEABLE GURGLING SOUND ,,IF IT DOESN'T YOU STILL HAVE A BAD PUMP, ALLSO DID YOU NOTICE ON THE FRONT OF THE PUMP WHEN YOU FIRST INSTALLED IT DID IT HAVE THE SERRATED INPUT SHAFT OR A KEYED SHAFT , SOMETIMES THE KEYS WILL FALLOUT INSTALLING THE PULLEY , IF IT HAS THE SERRATED SHAFT CHECK THE PULLEY CAREFULLY THEY WERE NOTORIOUS FOR STRIPING OUT THE SERRATIONS AND THE PUMP WILL TRY AND WORK, BUT SLIP ON THE SHAFT, ALL THE LATER PUMPS HAVE THE KEYWAY SETUP. ,, JERRY