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Page Title: OPERATING PROCEDURE (Continued)
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TM 5-4320-305-10 2-6. OPERATING PROCEDURE (Continued) (5) Adjust   the   three   jack   extensions   so that  the  trailer  is  level.    Although  the pump   assembly   will   function   while within   15   degrees   of   level,   a   level position   is   recommended   for   pump efficiency and operating safety. (6) Connect  ground  cable  assemblies  (1) to   ground   connection   (2)   on   trailer. Be  sure  that  electrical  connection  is tight. NOTE The  earth  surrounding  ground  rods must    be    moist    to    make    a    good electrical    connection.        In    dry    or sandy  areas,  pour  water  around  the rods to improve the connection. (7) Drive  ground  rods  (3)  a  minimum  of  2-1/2  feet  (0.762  m)  into  the  ground.    Use  nonsparking  mallet stowed in tool box. (8) Connect ground cable assemblies (1) to ground rods (3).  Be sure that connector (4) has made a tight electrical connection. WARNING Do not attempt to pump any liquids for which this centrifugal pump unit has not been designed. The  centrifugal  pump  unit  has  been  designed  to  pump  potable  water  or  petroleum-based  fuels with specific gravities between 0.85 and 1.0. Do not pump potable water after the pump has been contaminated by pumping fuel. c. Preparation    for    starting.        Although    the centrifugal pump unit is self-priming, it should never be operated unless the pump body is filled with liquid to the bottom of the suction port. (1) Open   gate   valve   (1)   of   the   pump suction assembly. (2) Remove  dust  cap  from  priming  port (2)   on   pump   body.      Fill   the   pump volute   with   the   liquid   that   will   be pumped until it reaches the bottom of the  suction  port.    Replace  dust  cap. When   the   centrifugal   pump   unit   is started, the pump body will prime and reprime  as  necessary  as  long  as  the pump body is full to the bottom of the suction port. (3) Open   gate   valve   (3)   of   the   pump discharge manifold assembly. 2-68

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