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REPAIR (cont) - TM-5-4210-220-12_365
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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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Valve Repair - TM-5-4210-220-12_367
TM 5-4210-220-12 4-18 PUMP, PIPING, AND VALVES - Continued 4-18.5 Water Tank Valve - Continued (14) Install  the  microswitch  bracket  (4)  and microswitch wiring support clamp (3) using screws (5). (15) Install  both  shuttle  valves  (2)  as  detailed  in  Shuttle  Valve Repair preceding. (16) Install   microswitch   (1)   as   detailed   in   Microswitch   Repair preceding. (17) Attach  microswitch  cam  (13)  to  actuator  shaft  using  screw (14). (18) Be sure valve operates.  Operate from cab (mode switch set to CFR) and from structural control panel (mode switch set o STRUCT).  Tighten/remake connections as required. (19) Be  sure  cab  lamp  illuminates  when  valve  is  open.    Adjust microswitch as required. d. Valve Repair (1) While supporting the actuator assembly (1), remove the four machine screws (2). (2) Separate the actuator assembly (1) from the valve extended hinge pin (5). (3) Using  mechanics  wire  support  actuator  assembly  (1)  from frame side member. (4) Remove    four    locknuts    (6)    and    capscrews    (7)    Discard locknuts. (5) Separate the pipe flanges (8 and 9) and lower valve (4). (6) Clean   pipe   flanges   (8   and   9)   and   inspect   for   cracks   or corrosion.  Replace pipes as necessary. (7) Apply gasket eliminator (item 14, Appendix E) to pipe flanges (8 and 9). (8) Separate the two pipe flanges (8 and 9), allowing enough room to install the valve (4) without disturbing the gasket eliminator. (9) Install valve (4) between the two pipe flanges (8 and 9) with flow arrow pointing away from the tank. (10) Apply threadlock liquid (item 29, Appendix E) to capscrews (7). 4-232

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