My Case 85xt Skid Steer has a hydraulic leak somewhere but the engine area is covered in oil sludge so I can't tell where it is coming from. Is it safe to use de-greaser and or water around the engine compartment?
I'm not familiar with your piece of equipment, but in general, yes it's okay to clean an engine compartment. Just don't use an inflammable degreaser. I like Krud Kutter or Simple Green at full concentration. Let it sit a few minutes then spray it down with a hose. Keep in mind afterwards you might want to spray some clean oil wherever there are moving parts or things that might rust, since you'll be cleaning all of the 'natural' lubricant/protection away.