I have an E120b cat 1990 the serial number is 7NF05014 I purchased an operation and maintenance manual for it by the serial number and it doesn’t have anything I need or just would like in it. Any pointers on a reliable source for manuals I’d like to have the operation and maintenance manual as well as the service and repair manual.
7NF05014 is a grey import, it was originally built only for the Japanese home market. All original publications for your machine were only ever available in Japanese. The best you can do is get an English publication for the US-market equivalent E120B that was S/N prefix 6JF. Did you try here.? Genuine Cat Manuals. https://www.servicemanualpro.com/?page=Products&searchbox=7NF05014 You can also get an O&M Manual from Cat Publications. The reference is XEBU9643. https://catpublications.com/ - put XEBU9643 in the box and click Search.