FLUID STOWAGE SYSTEM A fluid stowage system (fig. 3-11) is provided to stow  fluid  from  the  arresting  engine  during maintenance and to transfer fluid back to the engine after maintenance is complete. The fluid stowage system consists of one common, steel stowage tank that serves all the arresting engines installed on a particular ship. It is equipped with piping valves from the accumulator to the stowage tank. The  capacity  of  the  fluid  stowage  tanks  is  700 gallons. The stowage tank is capable of storing all the fluid  in  the  system  of  one  arresting  engine.  Ship's low-pressure air is used to force the fluid to and from the stowage tank. A pressure relief valve, which is set at 120   psi,   is   provided   to   prevent   excessive   pressure buildup. The relief valve is located on the stowage tank. In  addition,  a  90-gallon  stowage  tank  is  installed  on each  side  for  the  port  and  starboard  sheave  damper assemblies. The 90-gallon stowage tank is a repository to transfer and replenish hydraulic fluid for the sheave damper assemblies. FLUID RECLAMATION SYSTEM The fluid reclamation system (fig. 3-12) provides a means of reclaiming hydraulic fluid removed from any engine  due  to  venting  or  through  leaks  or  spills.  The fluid  reclamation  system  consists  of  a  stainless  steel 90-gallon  tank  located  in  close  proximity  to  the  fluid stowage  tank,  a  centrifugal  1/3  hp  pump,  filter  and piping connections. The piping connects the reclamation  tank  to  the  existing  stowage  tank  line. During   fluid   transfer   from   the   reclamation   system, hydraulic  fluid  is  filtered  to  ensure  that  only  clean uncontaminated fluid enters the fluid stowage tank. FLUID COOLER During continuous arresting operations, the engine fluid temperature rises because of friction of the fluid moving through the engine, control valve, and piping. To  maintain  extended  pendant  engine  operation,  the fluid  temperature  is  reduced  by  the  fluid  cooler.  (See fig. 3-13.) The maximum operating temperature for the arresting engines is 170ºF. Prolonged operation at this temperature limit is not recommended. The fluid cooler is mounted in saddles on top of the engine structure adjacent to the accumulator. Fluid coolers are used on all Mk 7 arresting engines serving a pendant engine. Engine fluid, as it is returned from   the   accumulator   to   the   main   engine   cylinder during retraction of the engine, flows through the fluid cooler body. Heat from the engine fluid is transferred to cool  service  water  (salt  water)  flowing  at  100  gallons per minute through tubes within the cooler body. 3-14 PRESSURE RELIEF VALVE (SET AT 120 PSI) MANHOLE COVER 700-GALLON TANK CHECK VALVE FILTER 316077-2 AIR STRAINER MOISTURE SEPARATOR MAIN AIR SHUTOFF VALVE TO OTHER ENGINES MOISTURE SEPARATOR AIR STRAINER TO OTHER ENGINES FROM LOW-PRESSURE AIR SUPPLY LEGEND CLOSED VALVE OPEN VALVE PLUG COCK FLANGE ABEf0311 Figure 3-11.—Fluid stowage system—secured condition.