1 - 247Chapter 3 Removal and Replacement Procedures (RRPs)RRP12.19 GEAR SECTOR (PL12.3)Removal1) Remove the COVER CST (PL 12.3.1) from the 550 PAPER CASSETTE (PL 12.3.50).2) Release the lock of the LOCK EXTENSION, and draw out the cassette extension as far as itwill go.3) Release the hooks securing the GEAR PINION (PL 12.3.12) to the HOUSING TOP 550 (PL12.3.16), and remove the GEAR PINION.4) While pressing down the lock of the STOPPER GEAR (PL 12.3.29), release the lock of theLEVER BTM LOCK (PL 12.3.27) to lift up the PLATE ASSY BTM. (Figure 20.21)5) Slide the GUIDE ASSY SD L550 (PL 12.3.11) inward, and remove it from the HOUSING TOP550 by pressing down the hook of the HOUSING TOP 550.6) Slide the GUIDE ASSY SD R550 (PL 12.3.13) inward, and remove it from the HOUSING TOP550 by pressing down the hook of the HOUSING TOP 550.7) Remove the 2 screws (gold tapping, 8mm) from both right and left sides, as well as the 6screws (gold tapping, 8mm) on back, that secure the HOUSING TOP 550 to the HOUSINGBASE 550 (PL 12.3.44).8) Release the 4 hooks of the HOUSING TOP 550, and remove the HOUSING TOP 550 togetherwith the HOUSING EXTENSION 550 (PL 12.3.42) from the HOUSING BASE 550.9) Remove the 4 screws (gold tapping, 6mm) securing the COVER EXTENSION (PL 12.3.31) tothe HOUSING EXTENSION 550.10) Remove the COVER EXTENSION from the HOUSING EXTENSION 550.11) Remove the RACK SIZE (PL 12.3.40). (RRP12.18)12) Remove the screw (black with flange, 8mm) securing the GEAR SECTOR.13) Remove the GEAR SECTOR from the HOUSING EXTENSION 550.
