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Head Repair - Continued
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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Base and Body Repair - TM-5-4210-220-12_402
TM 5-4210-220-12 4-18.  PUMP, PIPING, AND VALVES - Continued (11)  Inspect head (10) and body (16) sealing surfaces for scratches, corrosion or dirt that may cause a leak. (12)  Inspect elevation bearing (15) for being worn or out of round.  Check O-ring grooves for being free from indentations or projections. (13)  Evidence of damage of any kind is cause for rejection.  Replace component or assembly as required. (14)  Attach the gear segment (17) to the head (10) using two washers (19) and two setscrews (18).  Tighten setscrews firmly. (15)    Lubricate  O-rings  (14)  using  silicone  grease  (item  27,  Appendix  E)  and  install  into  elevation  bearing grooves (15). (16)    Lightly  lubricate  the  elevation  bearing  (15)  outside  diameter  and  the  head  (10)  and  body  (16)  inside diameters using silicone grease (item 27, Appendix E). (17)    Lift  the  head  (10)  and  align  the  scribe  mark  on  the  gear  segment  (17)  with  the  scribe  mark  on  the elevation shaft (20).  Align the head (10) and body (16) inside diameters. (18)  Carefully slide elevation bearing (15) into body (16) and through head (10).  Be sure to align the hole in the head with the hole in the elevation bearing. (19)    Install  the  setscrew  into  the  head  (10).    Be  sure  the  point  of  the  setscrew  protrudes  through  the elevation bearing.  Tighten until snug. (20)  Install seal washer (8) and jam nut (7) onto setscrew (9) and tighten firmly. (21)    Lubricate  O-ring  (12)  using  silicone  grease  (item  27,  Appendix  E)  and  install  into  groove  of  end  cap (13). (22)  Install end cap (13) into body (16) and lock in place using retaining ring (11). (23)  Lift cable mounting plate assembly (6) and position on turret head (10).  Insert cable end (3) into sleeve boss (4). (24)  Install cable mounting plate capscrews (5) and tighten firmly. (25)  Install lockwasher (2) and nut (1) onto cable end rod (3) and tighten firmly. (26)  Check control cable adjustment following steps 20 thru 26 of Control Cable Repair preceding. 4-271

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