TM 10-3930-659-20 14-25.    SEAT ASSEMBLY REPLACEMENT. This Task Covers: a. Removal b. Installation Initial Setup: Tools/Test Equipment: Personnel Required:  Two • General mechanic's tool kit (Item 44, Appendix F) a. REMOVAL 1. If   required,   remove   four   plugs   (6)   from   seat assembly (1) to access screws (2). 2. Remove four screws (2), washers (3), and seat assembly (1) from seat support (4). 3. If  damaged,  remove  nine  screws  (7)  and  seat support (4) from heater housing (5). NOTE Perform step 4 only If replacing seat. 4. Remove  seatbelts  (see  paragraph  14-26)  and operator's manual holder (see paragraph 14-27). b. INSTALLATION 1. If  removed,  install  seatbelts    (see    paragraph 14-26)    and    operator's    manual    holder    (see paragraph 14-27). 2. If  removed,  install  seat  support  (4)  on  heater housing (5) with nine screws (7). 3. Install seat assembly (1) on seat support (4) with four washers (3) and screws (2). 4. If    removed,    install    four    plugs    (6)    on    seat assembly (1). TA706837 14-52