What was found
IN CRUISE AT 14,000' RECEIVED HYDRAULIC 3 HIGH TEMPERATURE. TEMPERATURE WAS 96 DEGREES C, RAN QRH. UPON SELECTING GEAR DOWN FOR LANDING WITH 3B ON 3A OFF RECEIVED A GEAR DISAGREE ON BOTH MAIN GEAR. SELECTED 3A ON & GEAR DISAGREE CLEARED WITH 3 GREEN INDICATIONS. NORMAL LANDING WITH NO FURTHER PROBLEMS. FLT#5658 REPLACED THE NR 3 HYDRAULIC SYSTEM RESERVOIR IAW AMM. PERFORMED GEAR SWINGS IN NORMAL & EMERGENCY IAW AMM. OPERATIONS CHECKED GOOD, PN 7303-1, SN ON 839A & SN OFF 890A.