What was found
WHEN STOPPING THE ACFT ON THE RAMP THE RT BRAKE GROWLS & AS THE ACFT STOPS THE BRAKE GRABS. REMOVED NR 3 & NR 4 MAIN WHEEL ASSEMBLIES IAW AMM 32-41-20. FOUND NR 3 INNER GREASE SEAL DAMAGED, RUBBER HAS A TEAR. VISUALLY INSPECTED NR 3 & NR 4 BRAKE ASSEMBLIES, NO DEFECTS NOTED. BRAKES SET & RELEASED NORMALLY ON JACKS. BLEW OUT BRAKE ASSEMBLIES WITH SHOP AIR. INSTALLED NEW INNER GREASE SEAL & INSTALLED SAME NR 3 & NR 4 MAIN WHEEL ASSEMBLIES IAW AMM 32-41-20. TAXI CHECK PERFORMED, CHECKED GOOD, NO DEFECTS NOTED.