What type of transmission fluid does a 1971 case backhoe model 580CK use?

The 1971 Case backhoe model 580CK typically uses Case MS-1204 or equivalent hydraulic/Transmission Fluid. It's important to check the owner's manual or consult with a Case dealer to ensure compatibility, as specific fluid requirements can vary based on the machine's condition and any modifications. Always use fluids that meet the manufacturer's specifications for optimal performance.