WHAT DOES CAT D3B SPECS MEAN?

I also have a 455D crawler loader/backhoe (very first cousin into the 450C), HLR Powershift transmission with manual clutch. Every is about twenty five years old and has about 6000hrs.i just purchest a d3b & hold the exact challenge with theleft pedal sticking i will check out oil to-morrow . I've an issue. could it be ordinary for just a loud deis