Like Hawkeye08 said, removal of the injectors would be the easiest, other than removing the head. The 580B's did not have glow plugs. They had 3 options for cold weather starting. A block heater, a manifold heater, and a ether injection system, into the intake manifold.
Here is a link, to Case Construction online parts store, already set to the 580B. Save it to your favorites, I'm sure it will come in handy.
Official Case Construction Equipment Online Parts Store and Parts Look Up. Parts for Case Equipment and Construction Equipment. Parts Store for Case Wheel Loaders, Case Excavators, Case Skid Steers, Case Original Parts. If you've never had a piece of Case Equipment, you'll soon find that they were great at changing parts, at certain serial number breaks. So you definitely want to find the serial number on that hoe, to help you find the correct parts.
If for some reason you would happen to need any parts, you can select a local dealer, then you can check prices on said part. You can also copy and paste the part number listed on these pages of the parts store, to a good search engine, and compare prices on aftermarket parts. I use Google. I've found in the past, some parts are dealer only, and also used on Case/IH Ag. tractors. Those parts through an Ag. dealer usually run 10% less than through Case Construction. I usually use Messicks Case/IH Ag. dealer, to see if parts are used on Ag. tractors.
Messicks | Your home for New Holland, Case IH, Kubota & More... There are very few dealer only parts anymore. Searching, using the part number is the easiest way I have found, to get the exact part you're looking for. There are a few dealers out there, that handle NOS parts, along with their aftermarket lines.