The problem is that the factory setup was a whole bunch of stuff that all had to work together. They installed a pressure relief valve in the two loader valve supply lines. This valve was different if you had power steering or not. So if you accidentally ran the tractor without hooking the return line back up it would not blow a line. Then there where three different Hydraulic valves used that I know of. Where you find them in the parts system now it is on computer is beyond me. I helped a parts guy look for a half an hour and we never did find them in the computer. He went and got the old Microfiche cards out.
I don't have the service manual on this tractor. I would need to look at the hydraulic flow chart to make sure you can get a external valve to work without any problems. The issue is that the hydraulic system on this tractor is a open center one. Meaning that the oil has to flow all the time. So when you tie into it you have to do it right or you can make something be blocked or have an open circuit in it where nothing will work.
Have you even found a loader yet that will fit??? You luck out and find one that came off of a JD 650. But then the valve may have stayed on the tractor.
There is a Compact tractor parts yard in western Kentucky. I have gotten parts from them before. They may have the complete setup for a JD 650.
West Kentucky Tractor Parts 6375 Joppa Landing Road Kevil, Kentucky 42053
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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