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TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
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Connecting Rod Caps and Bolts
ENGINE DIVISION SERVICE MANUAL TM 5-4210-230-14&P-1 ENGINE If inspection shows the piston pin bushings are worn, new  bushings  must  be  installed.    This  can  be  accomplished by placing the connecting rod under a hydraulic press in line with  the  properly  sized  hole  in  support  plate,  SE-1033,  and using SE-2539 tool, remove the bushing, Figure 94. Fig. 94 Using SE-2539 Tool to Remove Worn  Connecting Rod Bushing 1. Connecting Rod 3.  Remover 2. Press ram 4.  Support plate Fig. 95 Using SE-2539 Tool to Install New Connecting Rod Bushing 1. Large chamfer side 3.  Installer 2. Press ram 4.  New bushing To install the new bushing, place the bushing on SE- 2539 Installer and lubricate the bushing outside diameter with light oil.  Place the connecting rod on a flat surface plate with the large chamfer side of the main bearing bore up.  The split in   the   bushing   must   be   located   in   the   connecting   rod   as shown   in   Figure   97.   Press   new   bushing   in   until   bushing contacts flat surface plate, Figure 95.  If the bushing is flush on the surface plate    side, the opposite side of the bushing is allowed  to  be  flush  to  .010"  above  surface  (large  chamfered side of connecting rod). After  bushing  has  been  installed  in  the  connecting rod,  it  must  be  honed  to  proper  size  using  SE-2218  Honing Machine and equipment, Figure 96.  See "Specifications." Fig. 96 Honing Connecting Rod Bushing Using SE-2218 Equipment 1. Honing machine 2. Connecting rod Insert  the  piston  pin  into  the  piston  and  connecting rod   and   place   retainers   on   each   end.      Make   certain   the retainers   seat   fully   with   tension   in   the   grooves.      Test   the connecting   rod   and   piston   assembly   on   a   connecting   rod aligner.    If  any  misalignment  is  encountered,  a  new  rod  or piston may be required to overcome this condition. The    piston    is    constructed    so    that    it    may    be assembled either way on the connecting rod.  However, when the piston and connecting rod are installed in the engine, the large chamfered side of each rod must be located against the crankshaft   face.      The   chamfer   provides   clearance   at   the crankshaft fillet, Figure  97. CGES-210  Page 34 PRINTED IN UNITED STATES OF AMERICA

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