What was found
(CAN) WHILE TAXING FOR TAKE OFF NR1 HYD PUMP CAUTION LITE ILLUMINATED. THERE WAS NO LOSS OF FLUID SO A SHEARED PUMP WAS SUSPECTED.THE PUMP WAS EXAMINED AND FOUND SERVICEABLE.FURTHER INVESTIGATION REVEALED THE HYD SHUT-OFF VALVE IN THE CLOSED POSITION, OPPOSITE OF WHAT SHOULD BE THE NORMAL CONFIGURATION. THE FIRE T HANDLE WAS PULLED AND THE VALVE DID NOT FUNCTION AS IT SHOULD HAVE. THE NR1 ENGINE HYD AND FUEL SHUT-OFF VALVE CIRCUIT BREAKER WAS FOUND POPPED.THE C/B WAS RESET AND THE VALVE CYCLED AGAIN BUT DID NOT FUNCTION PROPERLY. VALVE WAS REPLACED.