GASKET 1228857 - Caterpillar

Starting in November of 1986, the updates to the Parts Book Microfiche will provide only those fiche that are either new or revised. Do not destroy any of the existing microfiche in your library unless there is a replacement for it in the update package.
For example, on Parts Book HEFP1231 for the 235 Excavator you will do the following:
... Fiche 1 of 5 dated 5-86 has not changed. You will keep the existing fiche.
... Fiche 2 of 5 dated 5-86 has changed. You will replace the existing fiche with a new one dated 11-86.
... Fiche 3 of 5 dated 5-86 has not changed. You will keep the existing fiche.
... Fiche 4 of 5 dated 5-86 has changed. You will replace the existing fiche with a new one dated 11-86.
... Fiche 5 of 5 dated 5-86 has not changed. You will keep the existing fiche.