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Fuel Bowls and Metering Blocks - TM-5-4210-230-14P-1_747
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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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Secondary Fuel Bowl and Metering Block:
TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 REASSEMBLY Figure 48  Bench Adjustment of Fuel Bowl Float 12.  The float is made of cellular plastic material; its buoyancy is  unaffected  by  leaks  (sometimes  experienced  with  hollow floats)  or  absorption.    While  the  final  fuel  filter  adjustment  is made  with  the  carburetor  installed  on  the  engine,  a  bench adjustment can be made before installing bowl as follows: a.    Loosen  lock  screw  enough  to  allow  adjusting  nut  to  be turned. b.  With fuel bowl inverted turn adjusting nut until float lever is parallel with floor of bowl (Fig.  48).  Tighten lock screw. 13.  Install fuel bowl screw gaskets on fuel bowl screws.  This will prevent threads from shaving off gasket particles into fuel bowl. 14.      Position   metering   body   gasket   (see   Fig.      49)   on   the dowels on the back of the metering body.  Assemble metering body  on  main  body  and  fuel  bowl  on  metering  body.    Insert four fuel bowl screws and tighten to 25-30 inch pounds. 15.    When  positioning  fuel  bowl  the  accelerating  pump  lever must   be   slightly   depressed   to   clear   the   diaphragm   pump lever.  When spring loaded bowl screws are used the following procedure should be used: Tighten each spring loaded bowl screw by rotating screw head until screw assembly bottoms in main body. Figure 49  Both Metering Body Gaskets are Furnished in Carburetor Rebuild Kits Bottoming  of  screw  assembly  is  accomplished  when  screw head  "springs  back"  about  one  quarter  (¼ )  turn  when  screw driver is removed from slot.  Excessive rotation of screw head can destroy spring. 16.  Apply Vaseline to the fuel transfer tube "O" ring seals and place  the  seals  against  the  flanges  on  both  ends  of  the  fuel transfer tube and install one end of the tube in the primary fuel bowl. Secondary Fuel Bowl and Metering Block: 17.    Assemble  the  secondary  fuel  bowl  by  following  Steps  9 through  12.    As  a  preliminary  secondary  float  adjustment, adjust  the  float  so  that  the  top  of  the  float  is  parallel  to  the bowl floor with the bowl in an inverted position (Fig.  48). 18.  Install   the   following   parts   in   the   secondary   metering block. Figure 50  Secondary Metering Block CGES-125-T  Page 32 PRINTED IN UNITED STATES OF AMERICA

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