Cat 910 electrical schematic

Would anyone have an electrical schematic for a 910 Cat 80U series? The gent that owns it has had it cobbled a few times since new and now wants it back as close to original as possible. I guess it was the first new one that he owned and he would like to get it back to a state of everything working correctly. It is a pretty clean unit and reasonably well maintained except for this. I know the wiring is fairly basic and sparse compared to today's machines but sometimes it is easier if one can see how it was originally. Thanks

Cat 910 electrical schematic