EQUALIZING BEAM SUSPENSION (HENDRICKSON) CLEANING, INSPECTION AND REPAIR LEAF SPRING ASSEMBLY 1. Wash   all   parts   in   cleaning   solvent   or   use   steam cleaning   equipment   to   remove   grease   and   scale. Use a wire brush to hasten dirt removal. CAUTION   DO   NOT   IMMERSE   RUBBER   SPRING BUSHINGS IN CLEANING SOLVENT.  USE A NON- PETROLEUM   BASE   TYPE   RUBBER   LUBRICANT ON   A   CLEAN   CLOTH   TO   WIPE   THESE   PARTS CLEAN. 2. Remove  spring  center  bolt.  Inpect  all  spring  leaves for    breakage    and    cracks.    Also    compare    arch    of leaves  with  new  leaves  and  if  leaves  are  flattened out, replace. 3. Spring    pins    must    be    replaced    if    they    are    worn, corroded or cracked. 4. Spring eye bushing and spring shackle bushing must also be replaced if defective. 5. Inspect  spring  hangers  for  wear  or  elongated  holes and cracks. Replace hangers if defective. 6. Always use new center bolts at each overhaul. 7. Lightly  lubricate  spring  leaves  with  a  thin  coat  of  IH- 251H-EP  multi-purpose  grease.  Place  spring  leaves in proper order and align center bolt hole with a long drift. 8. Compress    spring    leaves    sufficiently    for    installing center  bolt  and  nut.  Always  use  new  center  bolts  at each    overhaul.    Tighten    center    bolt    to    specified torque. WARNING - WHEN ASSEMBLING SPRING LEAVES,  BE  CAREFUL  TO  PREVENT  PHYSICAL INJURY TO PERSONNEL.THE   USE   OF   SPECIAL HOLDING     FIXTURES     OR     "C" CLAMPS FOR HOLDING   SPRING   LEAVES   IN   PLACE   DURING ASSEMBLY IS STRONGLY RECOMMENDED. 9. Align   spring   leaves   by   tapping   with   hammer   and position  rebound  clips  on  spring.  If  bolted  type  clips are   used,   install   spacers,   bolts   and   nuts.   Tighten enough to hold leaves in alignment but not enough to restrict  free  movement.  If  clinch  type  clips  are  used, bend  ends  of  clips  down  on  top  leaf.  Heat  clips  with torch to help eliminate breakage. LOAD CUSHIONS Visual inspection will determine necessity for replacement.If the load cushion is cut or damaged, it will   lose   its   capacity   and   replacement   should   be made.  The  height  of  the  load  cushion  is  10  cm  (3- 15/16") and it is possible that a permanent set could come about in service. A permanent set  of  not  more than    19mm    (1/4")    would    still    make    the    cushion acceptable for use. This means that a cushion with a free height of less than 9.37 cm (3-11/16") should be renewed. The  load  cushions  are  made  of  butyl  and  natural  rubber  and are    not    resistant    to    petroleum    products.    If    the    cushions become   saturated   with   these   products   they   will   split   and disintegrate.  In  an  operation  where  these  products  are  used, an oil resistant compound load cushion is available. Replace cushions, if they have taken a permanent set, and the height is 9.37 cm (3-11/16") or less. DRIVE PIN BUSHING 1. vertical  drive  pin  bushings  should  be  pressed  out  of the  saddles  from  the  top  side.  If  the  outer  sleeve  is frozen to the saddle wall, press the inner sleeve and rubber  out  of  the  bushing  and  work  the  outer  sleeve out of the saddle. Do not cut with torch or use heat as aluminum saddle Is Heat Treated. 2. Clean the bushing cavities in the saddles with solvent and remove any nicks with emery cloth. 3. This bushing is not pressed to fit as  there  is  at  least .18mm  (.007")  clearance  and  new  bushings  can  be hand pressed. 4. Reinstall   bushing   caps   and   locknuts   to    specified torque rating. (See Torque Chart). EQUALIZER BEAM END BUSHING REPLACEMENT Refer    to    the    SERVICE    portion    of    this    manual    section pertaining to the WARNING regarding equalizer beams. 1. Cut off rubber bushing flush with  equalizer  beam,  as shown’   in   Figure   6.   Rubber   must   be   removed   to permit adapter to contact bushing sleeve squarely. Figure 6 - PreparIng for Removal of Beam End Bushing Bushing CTS-4169 - Page 6