TM 10-3930-671-24 5. Do not repair chains by cutting out the worn sec tion and joining in a new piece. 6. If part of a chain is worn, replace all the chains or the truck. Lift Chain Inspection and Wear Criteria NOTE Take  measurement  while  chain  is  under tension when lifting a small load. 1. New Chain Length - The distance from  the  firs  pin counted  to  the  last  pin  counted  in  a  span  while  the chains are lifting a small load. 2. Worn Chain Length - See (1) above. 3. Span  -  The  number  of  pins  in  the  length  (segment, of chain to be measured, including the first one. 4. Pitch  -  The  distance  from  the  center  of  one  pin  to the center of the next pin. Figure 4.  Measuring chain for wear, using tape measure. Table of Chain Dimensions Leaf Chain Chain No. Pitch Span Worn Chain Length BL800 1.00 in.  (25.4 mm) 13 12.375 in. (314.3 mm) Lift Chain Replacement 1. All  chains  must  be  replaced  if  any  strand  has wear   of   3%   or   more,   or   if   any   of   the   chain- damage  conditions  noted  previously  are  found during inspection. 2. Replace   all   chains   as   a   set   (in   pairs).      It   is impossible to keep a balanced loading and wear life  between  chains  if  a  new  chain  is  put  into service    opposite    an    old     chain.          Inequities between  the  new  and  the  older,  worn  chain  will cause problems in  keeping  chain  tension  equal, accelerated wear, and probable early failure. 3. Order replacement chains as required. 4. Do  not  remove  the  factory  lubrication  from  new chains.    It  helps  prevent  wear  and  corrosion.    If the original lubricant has dried or been removed, apply  lubricant  as  specified  in  Lubrication  Order (Appendix B). 5. Do not paint new chain before or after installation.   Paint   may   help   prevent   corrosion, but  will  also  prevent  lubricant  from  reaching  the pins for good joint lubrication. 6. Carefully inspect the chain anchors and sheaves.    Broken,    cracked,    or    worn    anchors must  be  replaced.  Replace  worn  sheaves,  and check the sheave bearings  for wear. 7. Use new anchor pins when installing new chains. 8. Adjust the tension on new chains. 9. Lubricate  chains  when  they  are  installed  on  the upright. Fork Removal 1. Release the fork latches and move each fork to the notch on bottom of carriage. F-500