What was found
(CAN) UPON ROUTINE BRAKING DURING TAXI FROM RAMP TO RUNWAY, AC VEERED TO THE LT ON TAXIWAY. HARD PEDDLE(S) WHERE NOTED DURING THE ATTEMPT TO STOP. IN ORDER TO ENSURE DIRECTIONAL CONTROL AND BRING THE AC TO A COMPLETE STOP REVERSE THRUST WAS UTILIZED. THE AIRCRAFT WAS TOWED TO THE HANGAR FACILITY. INSPECTED BRAKE SYSTEM INCLUDING TRANSDUCERS AND BRAKE ASSEMBLIES. ATTEMPTED TO BLEED BRAKES AND FOUND EXTREMELY SMALL AMOUNTS OF FLUID COMING FROM RT BRAKE BLEED BLOCK (HARD RT PEDAL EVEN WHEN POWER BRAKE SYSTEM SHUT OFF). REMOVED RT BRAKE SHUTTLE VALVE ASSEMBLY P/N 195-183 AND INSTALLED SERVICEABLE UNIT. BRAKE SYSTEM BLED. GROUND AND TAXI CHECKED SERVICEABLE.