AT-81 A340E(Others) AUTOMATIC TRANSMISSION - FIRST AND REVERSE BRAKE AT5357 Z06793 3. REMOVE NO.2 BRAKE PISTON (a) Hold No.2 brake piston with hand, apply compressed air to transmission case to remove No.2 brake piston. HINT: If the piston does not pop out with compressed air, lift the piston out with needle-nose pliers. (b) Remove the O-ring from No.2 brake piston. SST AT8335 4. REMOVE REACTION SLEEVE (a) Using SST, remove the reaction sleeve. SST 09350-30020 (09350-07080) (b) Remove the O-ring from the reaction sleeve. SST AT8334 5. REMOVE NO.1 BRAKE PISTON (a) Using SST, remove the No.1 brake piston. SST 09350-30020 (09350-07090) (b) Remove 2 O-rings from the No.1 piston. Printed Number AT6460 AT0CC-02 FIRST AND REVERSE BRAKE INSPECTION 1. INSPECT DISC, PLATE AND FLANGE Check to see if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them. HINT: ★ If the lining of the disc is peeling off or discolored or even if a part of the printed numbers are defaced, replace all discs. ★ Before assembling new discs, soak them in ATF for at least 15 minutes. Spring Seat Q00777 2. CHECK PISTON RETURN SPRING Check the return spring free length together with the spring seat. Standard free length: 12.9 mm (0.508 in.)