What was found
MIA - FLT 5700 - WHILE TAXIING TO THE GATE, THE HYDRAULIC PRESSURE FELL TO ZERO AND HYDRAULIC FLUID WAS LOST. STOPPED THE ACFT AND CALLED FOR MAINTENANCE. MAINTENANCE TOWED ACFT INTO GATE AREA AND REPLACED THE BRAKE ASSEMBLY, WHEEL ASSEMBLY, BRAKE LINE, SWIVEL AND TIRE.