1986/12/01 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 SEFP1273 for the 3406B Truck Engine you will do the following:

... Fiche 1 of 2 dated 12-85 has not changed. You will keep the existing fiche.

... Fiche 2 of 2 dated 12-85 has changed. You will replace the existing fiche with a new one dated 11-86.