What was found
CREW RECEIVED NR 2 ENGINE HYD PUMP CAUTION LIGHT. CREW FOLLOWED QRH, CONTACTED MAINTENANCE VIA RADIO AND ELECTED TO DIVERT. SHORTLY AFTER DIVERTING, ACFT LOST NEARLY ALL OF THE HYD FLUID IN THE NR 2 SYS. CREW DECLARED EMERGENCY IN CASE THEY WOULD BE UNABLE TO TURN OFF RUNWAY AFTER LANDING. WITH EMERGENCY VEHICLES STANDING BY, CREW LANDED WITHOUT INCIDENT AND STOPPED ON RUNWAY. ACFT WAS PULLED VIA TUG TO GATE. MAINTENANCE INSPECTED AND FOUND THE ENGINE 2 VARIABLE PUMP LEAKING. MAINTENANCE R & R THE ENGINE NR 2 VARIABLE PUMP AND PERFORMED A SIMPLIFIED FLUSH IAW AMM. ACFT OPS CHECKED GOOD.