What was found
REJECTED TAKE OFF. DURING TAKE OFF ROLL AFTER A/T ENGAGE AND TO POWER WAS ADJUSTED (EPR 2.04) REACHING 60 KTS THERE WAS A VERY STRONG VIBRATION, LOW SPEED REJECTED TAKE OFF WAS PERFORMED. DURING VIBRATION BRAKES DID NOT WORK UNTIL REACHING 30 TO 49 KTS. TOGW 132600 FLAPS. 6.2 ASSUMING 28` CELSIUS. IAW AMM 32-40-02 PAGE 204 RT AND LT NOSE WHEELS REPLACED, IAW 05-51-10 PAGE 601, MLG VIBRATION CHECK WAS PERFORMED. ALSO IAW AMM 32-42-01 PAGE 205. BLEED BRAKES PROCEDURES WERE DONE.