TM 10-3930-659-34 4-63. SEAT ASSEMBLY REPAIR (Con’t). 13. Remove   spacer   (36),   screw   (40),   and   washer (39) from backrest (1). 14. Remove  screw  (37),  washer  (38),  spring  (34), and spacer (35) from backrest (1). 15. Remove   adjustment   angle   support   (47)   from seat pan (7). 16. Remove dowel pin (43), washer (46), adjustment angle  support   knob   (41),   adjustment   nut   (44), and   spacer   (45)   from   seat   pan   (7).   Discard dowel pin. 17. If     damaged,     remove     dowel     pin     (42)     from adjustment angle support knob (41). 18. Remove four screws (48) and seat pan (7) from top plate (49). 4-240