What was found
AFTER T/O, HYD TEMP CLIMBED TO 83 DEG C, PERFORMED ABNORMAL CHECKLIST, NO CHANGE. RETURNED TO RAMP. REMOVED & REPLACED NR 3 ENG HYD DRIVEN PUMP, PERFORMED OPERATIONS CHECK, CHECKED NORMAL IAW MM 29-30-0. DURING TAXI FOR T/O, HYDRAULIC OIL TEMP CLIMBED TO 83 DEG C. HYD OIL TEMP LIGHT ILLUMINATED. PERFORMED ABNORMAL CHECKLIST, NO CHANGE. RETURNED TO RAMP. PERFORMED HYD SYS OPS CHECK, REMOVED & REPLACED LT & RT NOSE GEAR STEERING CYLINDERS, NO LEAKS NOTED. ALSO REMOVED & REPLACED NR 3 ENGINE HYDRAULIC PUMP. OPS CHECKED, NO LEAKS NOTED. REPLACED LT MAIN GEAR DOOR ACTUATOR. OPS CHECKED NORMAL, NO LEAKS NOTED. PERFORMED OPERATIONAL CHECK OF ALL HYD SYS, CHK NORMAL, NO OVERTEMP.