Installation Below Filter Fuel Storage Application 1.    Remove  vacuum  side  filters  in fuel line between fuel tank and fuel pump.        Cast-in    head    or    non- removable housing should be adapted   with   the   Racor   Spin-On By-Pass (Part NO. 11548). Otherwise,  service  leave  in  place. All    secondary    or    pressure    side filters   located   between   the   pump and engine should be serviced and left in place. 2.      Mount   Racor   Filter/Separator vertically   on   the   vacuum   side   of the fuel pump or transfer pump,  whichever  comes  first,  in  a convenient    location    for    servicing and monitoring contaminants. Maintain   vertical   clearance   above filter housing for removal of element or elements. )See 500MA, 900MA, or 1000 MA Parts Diagram.) 3.        Position    unit    between    the horizontal  planes  of  the  bottom  of the fuel tank or day tank and pump inlet  for  minimum  restriction  to  the pump.  (See Figure 1). 4.  Install fuel line from tank to inlet side  of  the  Racor  unit  using  plated steel fittings and maximum fuel line size   available   in   order   to   reduce restriction.      Any   fuel   by-pass   or return    lines    returning    to    suction section  of  filter  which  are  removed must be routed into inlet side of the Racor unit using plated steel   fittings.      These   fittings   are available from your dealer or Racor Industries.  Lubricate the O- ring of each fitting before installation.    (Use  clean  diesel  fuel or a light oil.) 5.  Install fuel line from the outlet of the  Racor  unit  to  the  inlet  of  the transfer  or  fuel  pump,  again  using plated steel fittings. 6.        Remove    lid    and    prime    the system  by  pouring  clean  fuel  into filter  cylinder  until  full.    Replace  lid and     hand-tighten     the     T-handle. Carefully   clean   any   accumulation of     diesel     fuel     from     the     metal deflector bowl. 7.    Start  engine  and  test  system. See Troubleshooting Section.) Figure 1 Installation Above Filter Fuel Storage Application 1.  Follow Steps 1 and 2 for Below Filter Storage Application. 2.    Position  unit  between  fuel  tank and   fuel   pump   inlet   for   minimum restriction to the pump.  (See Figure 2.) 3.  Follow Steps 4 and 5 for Below Filter Fuel Storage Application. 4.  On a 500Ma, 900MA, 1000MA, 73/1000A   or   77/1000MA   unit,   a valve must be installed on the inlet side of the filter system.  This valve is necessary when changing elements.        (See    Figure    2    and Accessories Section.) 5.  On a 75/900MA, 75/1000MA, or 79/1000MA  unit,  a  pipe  tee  with  a compound vacuum/pressure gauge   must   be   installed   on   the outlet    side    of    the    filter    system. (See    Figure    3    and    Accessories Section.) 6.  Follow Steps 6 and 7 for Below Filter Fuel Storage Application. Figure 2 Figure 3 3 Maintain a minimum of 5-1/8” vertical spacing between mounting clamps on 1000MA and 1000MAM.