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Nozzle Repair - TM-5-4210-220-12_409
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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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Nozzle Repair - Continued - TM-5-4210-220-12_411
TM 5-4210-220-12 4-18 PUMP, PIPING, AND VALVES - Continued 4-18.17  Bumper Turret - Continued c.  Nozzle Repair - Continued (6)  Remove jam nut (15) and lockwasher (16) that  retains  the  button  (17)  to  the  button shaft (14). (7)    If  web  (13)  is  damaged  and  needs  to  be replaced,  press  it  out  of  the  tip  assembly (10) using an arbor press. (8)  Clamp the button shaft (14) in a vise and remove jam nut (12). (9)    Unscrew  web  (13)  from  button  shaft  (14). Discard web. (10)    Remove  button  shaft  (14)  from  vise  and inspect    for    damage    such    as    stripped threads, corrosion or bends. (11)        Remove    O-rings    (18,    19)    from    tip assembly (10).  Discard O-rings. NOTE Small  lime  deposits  can  be  dissolved  by  soaking  parts  in  acetic  acid  (item  1,  Appendix  E)  and rubbing them with a brass bristle brush. (12)  Remove lime deposits, or corrosion using a brass bristle brush. (13)  Wipe all components using a soft, dry, lint-free cloth. (14)  Inspect all components for corrosion, cracks, or stripped or worn threads. (15)  Evidence of damage of any kind is cause for rejection.  Replace component or assembly as required. (16)  If web was removed, press new web (13) into the tip (10) through the inlet end.  Ensure the machined face of the web is installed first. (17)  Attach button (17) to the button shaft (14), using lockwasher (16) and jam nut (15).  Tighten jam nut to 9 ft lb (12 Nm). (18)      Apply   threadlock   liquid   (item   29,   Appendix   E)   to   the   button   shaft   (14)   following   manufacturer's recommendations. (19)  Screw button shaft (14) into web until clearance between button (17) and tip assembly (10) is 0.14 in. (3.6 mm) as shown. (20)  Install jam nut (12) onto button shaft (14) and tighten to 17 ft lb (23 Nm). 4-280

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