Adjusting Screw (430, 430-2, 500 Sereis, 600/600-2
          Series)
430/430-2 Use Regardless of Serial Number
  501R    Starting with #M/P1004775 and between
          #M959920-M960169. Prior to #M/P1004775
          except between #M959920-M960169 see
          6110520
  501F    Starting with #M/P1004775 and between
          #M960170-M960319 and #M996400-M996574.
          Prior to #M/P1004775 except between
          #M960170-M960319 and #M996400-M996574
          see 6110520
  511     Starting with #M1004775 and between
          #M964470-M964769. Prior to #M1004775
          except between #M964470-M964769 see
          6110520.
  532     Starting with #M/P1004775 and between
          #M964770-M965069 & #M990700-M990999.
          Prior to #M/P1004775 except between
          #M964770-M965069 & #M990700-M990999 see
          6110520.
  542     Use Regardless of Serial Number.
  550     Starting with #M/P1004775 and between
          #M964070-M964469 & #M984750-M985149.
          Prior to #M/P1004775 except between
          #M964070-M964469 & #M984750-M985149 see
          6110520.
  561     Starting with #M/P1004775 and between
          #M965470-M965869. Prior to #M/P1004775
          except between #M965470-M965869 see
          6110520.
  590     Starting with #M1004775 and between
          #M965870-M966269. Prior to #M1004775
          except between #M965870-M966269 see
          6110520
600 Series Use Regardelss of Serial Number.
600-2 Sers Use Regardelss of Serial Number.