My guess is the OP lives in kalifornia (just lists USA in location) and the "largest case parts house on the west coast" is probably also in kalifornia and 580C's violated communist kalifornias clean air laws , so dealers don't sell parts for them . If you have watched the auctions all the old...
Here you go Case 580C parts manual free to download
After doing a little more looking through some old parts books it looks like the 580D also used the 2 cylinder design and have different part numbers for the 3 stick (4 stick with extend-a-hoe) valves in the backhoe valve body . The 580D's were built at the same time as the early SEE's , so you...
Coleman Equipment has a pretty good online store for a Case dealer , most prices are posted but some require calling them.
Their prices are usually the same or very close to my local dealer .
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