TM5-4210-229-14&P 5-23.   POWER STEERING GEAR REPAIR (Continued). e. Position    catch    basin    beneath    gear    to    protect against fluid spill during removal of trunnion cover (8). f. Remove  four  trunnion  cover  bolts  (9)  and   trun- nion cover (8). g. Remove  two-piece  sector  shaft  seal  (10),  teflon backup  washer  (11)  and   trunnion  cover  sealring (12). Cleaning  solvent  (Appendix  D,  Item  54)  is  both toxic and flammable.  Keep off skin.  Use only in a    well-ventilated    area    and    avoid    prolonged breathing   of   vapors.      Keep   away   from   open flames. h. Clean  trunnion  cover  (8)  with  solvent  (Appendix D, Item 54). i. Mark    to    assure    proper    alignment    during    as- sembly    remove    input    coupling    (13)    and    seal protector   (14).      If   coupling   (13)   is   tight,   insert screwdriver into slot to release. j. Clean  the  area  around  the  input  shaft  using  fine emery paper (Appendix D, Item 13). k. Remove and plug the return line (15). l. Remove  and  discard  seal  (16)  and  remove  seal retaining ring (17) from the valve housing (18). Compressed air used for cleaning or drying can create airborne particles that may enter the eyes. Pressure   shall   not   exceed   30   psi   (206   kPa). Wearing of goggles is required to avoid injury to personnel. m. Hold a piece of cloth (Appendix D, Item 14) over the worm shaft/input shaft (19) and apply air pressure to the  valve  housing  return  port  (20).      This  will  force  the two piece input shaft seal (21) and steel backup washer (22) to pop out of the gear.  Discard the two piece seal. REPAIR Repair consists of replacing damaged or defec- tive components. ASSEMBLY a. Apply  grease  (Appendix  D,  Item  22)  to  the  new input shaft seal (21) and steel backup washer (22) and to the input shaft (19). b. Install the two piece seal (21) flat side up and the steel backup washer (22) using seal driver. c. Install retaining ring (17). d. Pack  the  area  around  the  input  shaft  with  high temperature grease (Appendix D, Item 22). e. Install the new seal (16) using the seal driver. f. Add   more   grease   (Appendix   D,   Item   22)   and assemble   seal   protector   (14)   onto   worm   shaft/ input shaft (19) seating it in the relief groove just beyond  the  input  shaft   serrations  with  cup  side toward the gear. g. Remove plug in return line (15) and reconnect the return line to the steering gear. h. Reconnect    input    coupling    (13)    aligning    marks properly. 5-55