OK, I just purchased a 580CK diesel, been stood for a while fires right up backhoe and front bucket work fine on about 1 gallon a day of fluid! But it won’t move back ward or forward it’s the shuttle shift model. The guy said it just got slower and slower and just stopped working a few years ago. I will tell u this guy was an artist and used it to move lumps of wood around to carve and had no clue mechanically and never once serviced it where do I check the fluid level and filter before a go to the next thing to check…this picture is with the front wheels off to fix the flats

Thanks for the info Guys, I just got it home today and now I have had a good look around it and listened to the noise that is coming from the bell housing/clutch area is seems that the Clutch has disintegrated. On big steep learning curve here as I have only have been around 70’s JCBs so I will make pictures and info available as I want to get this thing sorted,what configaration is this 580CK with this control setup>?

another picture

There are a couple of common wear/trouble areas on that machine that can slow down or stop the shuttle-shift. The oil pickup tube has a little screen on the end that tends to plug (for the converter oil pump). Also, the keyway on the same pump tends to shear. The pump and pickup tube can be accessed without splitting since it all comes out from the top. Another thing to check is the clutch pedal linkage - it's a pretty convoluted setup and once it gets worn, or out of adjustment, the shuttle shift won't work. My 68 580CK has had all these problems.

Torque Converter/Power Shuttle Oil filter is located behind the grille, in front of the radiator. Case part number: A39578. It is a cartridge type, not a spin-on. Is available at our local dealer (Agricultural dealer). I have had luck converting some Case filter numbers to a different brand available at most any NAPA or good auto parts store.

The dip stick is on top of the shuttle housing, in front of the shift lever. It is a hex head "plug" type with the dipstick welded to it.

Good Luck & welcome to the Case world... Mr Beer.