Heat Exchanger, Fre SVCE (501F)
          Use Prior to Serial #960170 And Between
          #960320 And #996399 Also Use Between
          Serial #996575 and #1004774.
          From #960170 to #960319 use 7019366.
          From #996400 to #996574 use  7019366.
          From #1004775 to #1104939 use 7019366.
          From #1104940 to #1105139 use 7022316.
          From #1105140 to #1204489 use 7019366.
          From #1204490 to #1212289 use 7022316.
          From #1212290 to #1212489 use 7019366.
          Starting with #1212490 use 7022316.