hi ihave a CAT CHELLENGER 65 WITH STEERING PROBLEMS IT WILL NO TURN AT ALL AND NO PRESSURE AT THE STEERING WHEEL CONTROL VALVE . DOES ANY ONE HAVE A SCHEMATIC OF THE STEERING SYSTEM , OR ANY CLUES AS TO WHAT MAY BE GOING ON . PROBLEM STARTED AFTER A HOSE TO STERRING MOTOR BURST , HOWEVER A LOT OF PEOPLE INCLUDING WESTRACK HAVE PLAYED ARROUND WITH WITH THIS . THE STEERING PUMP AND PIGGY BACK PUMPS HAVE BEEN SENT TO A HYDRAULIC REPAIR CENTRE , NOTHING REPORTED WRONG. WOULD APPRECIATE SOME HELP. REGARD'S, ADRIAN
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