TM 10-3930-659-34 4-63. SEAT ASSEMBLY REPAIR. This task covers: a. Removal b. Installation INITIAL SETUP: Equipment Conditions: Materials/Parts: • Seatbelts removed (see TM 10-3930-659-20) • Detergent (Item 23, Appendix B) • Operator's manual holder removed (see TM 10-  • Grease (Item 33, Appendix B) 3930-659-20) • Rags (Item 43, Appendix B) • Seat assembly removed (see TM 10-3930-659-20)• Dry cleaning solvent (item 47, Appendix B) • One cotter pin Tools/Test Equipment: • Two dowel pins • General mechanic's tool kit (Item 71, Appendix E)  •· Two locknuts • Electric drill, portable (Item 20, Appendix E) • Three roll pins • Twist drill set (Item 21, Appendix E) • Four rivets • Blind hand riveter (Item 55, Appendix E) General Safety Instructions: Personnel Required: Two • Dry cleaning solvent is flammable and must not be used near open flame. Use only in a well-ventilated References: area. TM 10-3930-659-20 a.  DISASSEMBLY 1.    Remove backrest extension (2) from backrest (1). 4-236