Here's what to look for based on the 11K05182 S/N. The same manuals might apply for the other machine but that is not guaranteed. See comments below.
SEBU5374 - Operation & Maintenance Manual - $30
UEG0732S - Parts Manual - $124
REG00635 - Service & Repair Manual - $200.
Prices quoted are for pdf downloads and/or CD as appropriate. The service manual is not available for donwload AFAIK, the nearest option that is not in paper form is on CD.
The 11K prefix covered both 977K and 977L loaders. There are 4 different ranges of the 11K prefix, 1-3918 that are badged as K model, 3919-5050, 5051-7762, and 7763-Up. The last 3 groups are all L models. Different manuals can apply to different groups, especially for parts.
You may find some useful information in this link -
https://tractors.fandom.com/wiki/Caterpillar_977K