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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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TM 5-4210-230-14&P-1 CHAPTER 2.  CONTROLS AND INSTRUMENTS Section 1 Pump and Accessory Controls 1. General This  section  identifies  and  describes  the  function  of  controls  and  indicators  used  in  operating  this  fire  fighting equipment. Note All control valves are, pull to open and push close, and are located at the operator's pump control panel. 2. Control Valves A. #1 crosslay.  (20, Fig. 3) used to control #1 - 1 1/2" crosslay discharge. B. #2 crosslay.  (21, Fig. 3) used to control #2 - 1 1/2" crosslay discharge. C. Pressure  relief  valve.    (22,  Fig.  3)  used  to  control  pump  pressure  by  turning  handle  CW  to  increase  CCW  to decrease.  The relief valve is used in conjunction with engine throttle control (16, Fig. 3). D. Water to proportioner valve.  (23, Fig. 3) used in conjunction with the foam to proportioner (37, Fig. 3) to control water supply to foam proportioner. E. Tank to pump valve.  (24, Fig. 3) used to open or close tank to pump line. F. Tank fill valve.  (25, Fig. 3) use to fill 300 gallon tank. G.    Hose reel valve.  (26, Fig. 3) used to control water discharge to hose reel. H. Auxiliary suction valve.  (27, Fig. 3) used to control auxiliary suction at rear of truck. I. #1 discharge valve.  (28, Fig. 3) used to control 2 1/2" #1 discharge (29, Fig. 3). 2-1

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