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ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 3-27.4.4  Rotor. CAUTION Do not touch machine finished surfaces.  Damage due to corrosion could occur. NOTE If  damage  or  excessive  wear  is  apparent,  head  and  rotor  must  be  replaced  as  a  matched  set. Final  check  for  excessive  wear  on  rotor  should  be  performed  on  test  stand  by  checking  for minimum cranking delivery. Examine  radii  contacted  by  leaf  spring  and  tang  slot  for  excessive  wear.    Check  all  slots  and  charging  and  discharge ports  for  chipping  of  edges  or  dirt,  and  rotor  shank  for  major  scratches.    Slight  erosion  on  edge  of  discharge  port  is considered normal. 3-27.4.5  Delivery Valve. Inspect delivery valve retraction cuff for chipping or erosion of edges. CAUTION Do not force plungers into their bore and do not handle precision parts of rotor. 3-27.4.6  Plungers. While holding rotor under clean oil, insert plungers into their bores facing same direction as they were removed.  With thumb  and  forefinger  over  shoe  slots,  tilt  rotor  from  side  to  side  several  times  to  determine  complete  freedom  of movement.    If  new  plungers  are  being  installed,  interchanging  their  positions  may  be  necessary  as  rotor  and  plungers become matched parts.  If plungers are sticking, but not visibly damaged, clean both plungers and bore with a soft brush and dry cleaning solvent (P680). 3-27.4.7  Cam Rollers and Shoes. CAUTION Never attempt to press a roller into a shoe from outer edges, as groove width at this point Is less than roller outside diameter and shoe breakage may result. Check each roller in its shoe for freedom of movement.  Inspect top edge of each shoe, where retained by leaf spring, for chipping or excessive wear.  Inspect roller and shoe for abrasive wear patterns. 3-27.4.8  Leaf Spring and Screw. CAUTION To  prevent  possible  Improper  positioning  of  parts  and  unnecessarily  disturbing  leaf  spring adjustment, do not remove screws (25, FIGURE 3-52) and leaf springs (26) unless they are being replaced or a new rotor and head assembly Is being Installed. a. If damaged, remove screws (25, FIGURE 3-52) and leaf springs (26). b. Check for excessive wear at points where spring contacts radii on rotor and along steps that retain roller shoes. Check adjusting screw for tightness in rotor. 3-99


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