MOTOR UNIT MOTOR UNIT 1) 1) 1 22 8 23 24 13 26 5 12 29 9 11 10 20 21 25 28 30 31 17 32 33 18 27 1 Drive shaft 5 Housing 8 Locking screw 9 Retaining ring 10 Shaft seal ring 11 Back up plate 12 O-ring 13 Locking screw 17 Threaded pin 18 Seal lock nut 20 Retaining ring 21 Back up plate 22 Taper roller bearing 23 Shim 24 Taper roller bearing 25 Retaining plate 26 Piston 27 Center pin 28 Pan head screw 29 Steel sealing ring 30 Cylinder block 31 Pressure spring 32 Adjustment shim 33 Control lens 2-22