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Page Title: Cleaning, Inspection and Repair
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TRUCK SERVICE MANUAL TM 5-4210-230-14&P-1 5.   Release vise to permit spring leaves to separate.   Remove spring from vise and separate leaves from center bolt. Cleaning, Inspection and Repair 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. 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.   Inspect 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.   Check spring brackets for cracks or for wear around mounting bolt or rivet holes. Replace bracket if damaged. 6.   Always use new center bolts at each overhaul. Assembly 1.   Lightly lubricate spring leaves with a thin coat of graphite grease.  Place spring leaves in proper order and align center bolt hole with a long drift. 2.   Compress spring leaves sufficiently for installing center bolt and nut. 3.   Place spring assembly in vise and compress spring leaves fully. CAUTION When  assembling  spring  leaves,  be  careful  to prevent physical injury to 1 personnel.  The use of  special  holding    fixtures  or  "C"  clamps  for holding  spring  leaves  in  place  during  assembly is strongly recommended. 4.   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. SHOCK ABSORBERS Shock   absorbers   are   provided   to   control   body sway  and  to  eliminate  excessive  tire  wear,  front  wheel shimmy  and  spring  breakage.    They  also  improve  the riding  qualities  of  the  truck  and  are  especially  useful when the truck is empty or only partly loaded. The  direct  acting  type  shock  absorber  (Fig.    6), sometimes called airplane type, has a sealed construction   and   requires   no   periodic   maintenance. Shock  absorbers  of  this  type  should  be  checked  every 16,000  km  (10,000  miles)  however,  to  make  sure  they are functioning satisfactorily, that bushings are not worn, and  that  outer  jacket  has  not  been  damaged  by  flying stones  or  debris  from  the  road.    If  a  shock  absorber  is leaking, fails to operate or develops unusual noises, the complete  unit  should  be  replaced.    Direct  acting  shock absorbers are nonrefillable and service is limited to unit replacement. Fig.  6 Direct Acting Shock Absorber MOUNTING AND LINKAGE Loose,  bent  or  broken  shock  absorber  mountings or  linkage  should  always  be  checked  for  and  corrected when   servicing   the   suspension   system.      Inspect   all rubber    bushings    and    grommets    to    see    that    they effectively   keep   metal   from   striking   metal.      Link   or bushing wear can be checked by twisting link with pliers or  by  prying  link  connection  with  screwdriver  or  small pry   bar.      Outward   appearance   will   usually   indicate excessive wear. SWAY BAR Some  body  styles  applicable  to  light  or.  medium duty  delivery  trucks  require  a  stabilizing  device  in  the suspension  system.    This  unit,  known  as  a  sway  bar, supplements the spring by adding greater stability to the truck. A   sway   bar   is   a   U-shaped   cross   bar   mounted transversely with the chassis frame. CTS-2680S  Chapter I  Page 5 PRINTED IN UNITED STATES OF AMERICA

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