STEP 4/ FILLING AND BLEEDING THE SYSTEM. This  procedure  requires  two  people. Do   not   attempt   filling   and   bleeding alone, since it would be difficult for one person  to  remove  all  the  air  from  the system.    Failure  to  remove  all  the  air will   result   In   spongy.      unresponsive steering. NOTE:    Using  the  funnel  only,  fill  the helm   pump   with   SEASTAR   outboard hydraulic fluid.  When the helm pump is full  of  oil,  screw  the  threaded  end  of filler  tube  into  the  filler  hole  and  Insert the   tunnel   into   opposite   end   of   filler tube. CAUTION:    During  the  entire  bleeding procedure, oil must always be visible in funnel or filter tube.  Do not allow the oil level to disappear into the helm pump as this   may   introduce   more   air   into   the system,    wasting    fluid    and    making bleeding more difficult. The second person is now required at the  splashwell  area,  equipped  with  a clean rag, pan, and the Allen wrench. Carefully fill the tunnel with oil Tilt   the   cylinder   so   that   the   bleed screw  on  the  starboard  (right)  side  is higher  than  the  port  (left)  side  and open   starboard   (right)   bleed   screw (approximately 5 turns). Turn steering wheel slowly to port (left) side  (1  turn  per  15  seconds  -  turning the  steering  wheel  fast  will  cause  air and oil to mix, requiring several hours of separation). When air-free oil appears from   bleed screws, close bleed screw. CAUTION: Ensure    that    the    steering    wheel    is securely  mounted  to  helm  with  washer and     nut,     before     attempting     wheel turning.    Tighten  nut  to  150  IN/LBS  (17 Nm).  Do not exceed 200 IN/LBS (22 Nm). Tilt cylinder so that the bleed screw on the  port  (left)  side  is  higher  than  the starboard  (right)  side  and  open  port (left)   bleed   screw   (approximately   5 turns). Turn steering wheel slowly to starboard  (right)  side  (1  turn  per  15 seconds). When  air-free  oil  appears  from  bleed screw, close bleed screw. Turn the steering wheel back and forth slowly.    Do  not  apply  pressure  when resistance   is   felt   at   each   hard-over position.      Stop   the   back   and   forth movement  by  turning  steering  wheel all the way to port (left). Repeat bleeding the system as above. Starboard side first - followed by port side Only a slight amount of air should appear this time. The   following   step   calls   for   removal   of excess oil in funnel and filter tube.  Do not ado more oil to funnel than necessary. Open port (left) bleed screw. Turn    steering    wheel    to    starboard (right)   side   until   oil   lust   disappears from sight in filler tube Close port (left) bleed screw. A  slight  movement  of  the  steering  wheel Should    now    cause    movement    of    the cylinder   rod,   indicating   that   the   steering system  is  properly  bled.    If  at  this  time  or anytime  in  the  future,  the  response  from steering    wheel    to    cylinder    rod    is    not immediate, re-bleed the system. Remove   funnel   and   filler   tube   from helm  pump,  and  screw  vent  can  onto filler hole. Ensure  at  all  times  that  fluid  level  in helm  pump  is  at  its  correct  level.    If any  metal  is  visible  through  the  filler hole,   add   SEASTAR   hydraulic   fluid. Use only SEASTAR outboard hydraulic   fluid   or   Texaco   aircraft   oil HO-15. · WARNING: Check  for  leaks.    Unchecked  leaks will lower the fluid level In the helm pump to such a point that spongy. unresponsive  steering  will  result. and in time could cause total loss of steering.