How do you set the hi and low idol in the fuel pump on a D-8H?

I am trying to slow down the fuel in my D-8H(SN-46A-1516😎. Can any of you reference the page number in a Caterpillar Service and/or Parts Manual that gives this information?

Slow the fuel (lower power) or slow the engine rpm?

RPM will be a lot simpler

To adjust the hi and low idle, you have to remove a small cover on top of the Governor housing. It's located just ahead of the base of the fuel filter housing, a single bolt in the middle of this cover holds it in place. Remove this cover and you will see two bolt heads. the one to the inside, closest to the block, is for low idle. Turn it clockwise to decrease your low idle rpm. To change the hi idle, you would adjust the outer bolt head, the one closest to you. This one is also turned clockwise to decrease the rpm. Do this with the engine running, when you adjust the low idle, increase the rpm with throttle after your adjustment, then move the lever(throttle) to idle position to see if the change in rpm is satisfactory. Your low idle rpm should be 455rpm, plus or minus 10rpm. The hi idle should be 1400rpm. When adjusting the hi idle, slow the engine down a bit, make your adjustment, then move the throttle lever all the way back for max. rpm, to be sure the rpm is what it should be set at, once you are satisfied, put the cover on and your done. If the cover doesn't seem to sit in place, you may have to move the adjustment bolts slightly, the cover is what keeps the adjusters in position. Good Luck.