A DC9-30 FLT CREW IS VECTORED OUT OF THE APCH SEQUENCE WHEN THEY NOTIFIED ATC THAT THEY HAD 'A MINOR PROB' WHILE ON APCH TO RWY 22R AT DTW; MI.

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DETROIT APCH HAD JUST GIVEN US A R TURN TO INTERCEPT LOC RWY 22R AT 20 MI FROM ARPT WITH A 20 DEG INTERCEPT. I ASKED THE FO TO CONFIGURE WITH SLATS EXTENDED AND FLAPS 5 DEGS. THE AUTOPLT WAS FLYING. THE ACFT ROLLED R FROM 20 DEGS OF BANK TO ABOUT 35 DEGS. I IMMEDIATELY DISCONNECTED THE AUTOPLT AND ROLLED WINGS LEVEL. WE RETRACTED THE FLAPS; LEAVING THE SLATS EXTENDED. THE FO THEN TOLD ATC WE WERE UNABLE TO CONTINUE THE APCH; THAT WE HAD A SMALL PROB; AND THAT WE HAD TO TURN OUT AND GET BACK TO THEM WITH DETAILS. APCH GAVE US A NUMBER OF VECTORS; SPD CHANGES AND ALT CHANGES. WE SAID WE WERE UNABLE TO COMPLY; THAT WE NEEDED TO BE WINGS LEVEL FOR A WHILE TO DETERMINE OUR SIT. WHEN HDG W; WINGS LEVEL; WE WERE ABLE TO DETERMINE THAT WE HAD FAILED TO TURN THE HYD PUMPS TO HIGH. WE TURNED THEM ON; RECONFIGURED SUCCESSFULLY AND TOLD ATC WE HAD NO PROBS NOW AND COULD CONTINUE THE APCH. THERE WAS NO LOSS OF SEPARATION. ANY POTENTIAL PROB WOULD HAVE OCCURRED IN THE TIME IT TOOK TO INITIALLY COMMUNICATE THE FULL EXTENT OF OUR PROB WITH ATC UNTIL THEY REALIZED WE COULD NOT CONTINUE OUR APCH AND HAD TO SPD UP TO CLEAN UP THE ACFT; NOT SLOW TO 180 KTS TO FIT THE TFC AS COMMANDED.