AT-80 A340E(Others) AUTOMATIC TRANSMISSION - FIRST AND REVERSE BRAKE FIRST AND REVERSE BRAKE COMPONENTS AT063-05 Flange Disc Plate Reaction Sleeve No. 2 Brake Piston Piston Return Spring Bearing ♦O-Ring ♦O-Ring Snap Ring ♦O-Ring No. 1 Brake Piston ♦ Non-reusable part 003743 AT0CB-02 FIRST AND REVERSE BRAKE DISASSEMBLY 1. CHECK PISTON STROKE OF FIRST AND REVERSE BRAKE Make sure the first and reverse brake pistons move smoothly when applying and releasing the compressed air into the transmission case. AT5258 Snap Ring SST 2. REMOVE PISTON RETURN SPRING (a) Place SST on the spring retainer and compress the return spring. SST 09350-30020 (09350-07050) (b) Using SST, remove the snap ring. SST 09350-30020 (09350-07070) AT8336