What was found
(CAN) DURING TAXIING ALTERNATE BRAKE ON AND ALTERNATE OFF POSITIONS, NO BRAKE PRESSURE AND NO BRAKE PEDALS. PARKING BRAKE PRESSURE OKAY AND WITH NORMAL ON POSITION, NORMAL BRAKE. TROUBLE SHOOTING FOUND BRAKE LOW PRESSURE RESERVOIR 4300 INDICATOR IN RED BAND, ALSO BLEED PORT WET AT VALVE 3301. SEAL REPLACED ON BLEED PORT AND COMPLETE LOW PRESSURE BRAKE SYSTEM BLEEDING CARRIED OUT.