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TM 5-4210-220-34 2-13. FIRE PUMP - Continued 2-13.8 Fiber Driving Wheel. This task covers Repair TOOLS MATERIALS/PARTS Shop Equipment, Automotive WRP 7938 Tab Washer Maintenance and Repair, UMP 7915 Fiber Wheel NSN 4910-00-754-0705 EQUIPMENT CONDITION Main Engine Shutdown (see TM 5-4210-220-12) APU Shutdown (see TM 5-4210-220-12) Batteries Disconnected (see TM 5-4210-220-12) Pump Access Panels Removed REPAIR (1) Using a block of wood, wedge it between water ring primer and bearing housing to disengage fiber wheel from drive pulley. (2) Straighten  the  tab  washer  (2)  and  remove nut (1). (3) Pull center piece (3) from primer shaft (6). (4) Remove  woodruff  key  (5)  from  primer  shaft (6). (5) Remove the fiber driving wheel (4) from the center    piece    (3)    by    removing    nuts    (9), lockwashers (8) and capscrews (7). (6) Inspect  center  piece  (3)  for  cracks,  warped flanges,  or  oblong  shaft  hole.    Replace  as necessary. (7) Attach   the   fiber   driving   wheel   (4)   to   the center     piece     (3)     using capscrews (7) lockwashers  (8)  and  nuts  (9)  Torque  nuts evenly to 12 ft lb (16 Nm). (8) Install woodruff key (5) into primer shaft (6). (9)   Aline  center  piece  (3)  key  slot  with  woodruff key  (5),  then  slide  onto  the  primer  shaft  (6). (10)  Install new tab washer (2) and nut (1) onto primer shaft (6).  Tighten nut to 44 ft lb (60 Nm). (11)  Bend tab washer (2) onto one nut flat. (12)Adjust  water  ring  primer  to  drive  pulley  as  detailed  in  step  39  and  40  in  para.    2-13.7.    If  adjustment  is necessary loosen locknuts and setscrews on fulcrum prior to adjusting. (13)  Check disengaging unit to primer adjusting screw clearance as detailed in step 28 of para. 2-13.11. 2-110

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