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PRESSURE   CHECKING   DIESEL   ENGINE   FUEL   SYSTEM (General)
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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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Fig.  5  Exploded View of Suspended Bowl Type Fuel Pump
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 FUEL SYSTEM stock  having  a  diameter  slightly  less  than  the  cam  lever  pin (24),  and  using  this  rod  as  an  aligning  tool,  temporarily  hold the rocker arm and lever assembly in place. Fig.  4  Exploded View Screen Filter Type Fuel Pump Legend for Fig.  4 Key Description 1 BOLT, Cover 2 WASHER, Cover Bolt 3 COVER 4 GASKET, Cover 5 SCREEN, Filter 6 HOUSING, Valve 7 SLEEVE, Compression Tube 8 NUT, Compression Tube 9 GASKET, Inlet and Outlet Valve 10 VALVE, Inlet and Outlet 11 RETAINER, Valve 12 SCREW, Valve Retainer 13 DIAPHRAGM, Pump 14 SPRING, Diaphragm 15 RETAINER, Oil Seal 16 SEAL, Oil 17 BODY, Pump 18 GASKET, Mounting 19 SPRING, Lever 20 WASHER, Rocker Arm 21 LEVER, Cam 22 LEVER, Diaphragm 23 RETAINER, Pin 24 PIN, Cam Lever 25 WASHER, Lock, 5/16 Medium 26 BOLT, Hex Head, 5/16 NF x 7/8 27 WASHER, Housing Screw 28 SCREW, Housing 2.      Push   new   pin   (24)   through   the   body   and   cam   lever assembly  as  the  aligning  rod  is  drawn  out.    Install  new washer  (20)  on  the  end  of  the  pin  and  install  new  pin retainers in pump body. 3.  Place gasket (9) and valves (10) in valve housing (6) and hold   the   valves   in   place   with   valve   retainer   (11)   and screws   (12).   To   make   sure   the   valves   are   installed correctly,  note  that  the  flat  side  of  the  outlet  valve  must face toward the diaphragm and that the inlet valve is just opposite. 4.    Depress  the  rocker  arm  enough  to  bring  the  diaphragm level with the pump body and hold the rocker arm in this position by means of a wedge or tool.  Place pump valve housing    (6)    over    the    diaphragm,    matching    up    the alignment   marks   of   the   valve   housing   with   the   pump body. 5.      Install   cover   screws   (28)   and   lockwashers   (27)   and partially   tighten   the   screws   but   do   not   compress   the lockwashers.  Remove the wedge or tool from the rocker arm   and   operate   the   rocker   arm   a   few   times   before tightening the valve housing down securely. 6.      Place   screen   assembly   (5)   and   gasket   on   the   valve housing.  Then position the cover (3) on pump assembly and install the cover bolt (1) and washer (2). Suspended or Side-Mounted Bowl Type The suspended bowl type fuel pump, Fig. 5, and the side-mounted bowl type fuel pump, Fig.  6, are disassembled in the following manner: 1.  Loosen the fuel bowl retainer and remove the retainer, fuel bowl gasket and paper or ceramic element. 2.  Use pliers and remove the cam lever return spring. 3.  Pry out the cam lever shaft seal plug and also remove the shaft  retaining  spring  pin  to  permit  removal  of  the  cam lever pin.  Take out the cam lever. 4.  Match-mark the edges of the valve housing assembly and pump    body    assembly    with    a    file    to    assure    correct alignment at reassembly. 5.  Remove the valve housing-to-pump body mounting screws and  separate  the  valve  housing  assembly  from  the  pump body. 6.    Pull  the  diaphragm  and  spring  assembly  from  the  pump body. CTS-2050-F Page 6 PRINTED IN UNITED STATES OF AMERICA

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