Deere 750 Hydraulic connections

[Dewey40]

I have a 1985 John Deere 750 tractor which has a remote hydraulic cylinder. The hoses were disconnected which operate the front arm and bucket. I am not able to figure out which hoses connect to which port on the tractor connection block. The connection block is marked A, B, C, and D for the port, but there are no labels for the hoses.

I have been able to get the bucket working by trying various connections, but havent been able to get the arm to work.

Does anyone have a picture/advise on which order to connect the hoses?

Much appreciated, thank you.

 

[Zebrafive]

First trace the loader hoses. One pair for the bucket, the other pair for the boom.
I would ASSUME A & B are for one pair and C & D are for the other pair.


ONE: connect a pair of hoses (confirmed for bucket or boom) to A & B. Test. If it works, try the same Pair in C & D.


TWO: if ONE above does NOT work. Change to A & C. Test, if that works, try B & D.


THREE, if ONE & TWO do NOT work. Change the pair to A & D. Test, if that works, try C & B.


Once you have determined which letters (A B C D ) are paired. Determine which pair are for the bucket and which pair are for the boom.


Then if operation of either or both functions (boom, bucket) are reversed, reverse that pair of hoses to the letter pair they are connected to. If A & B work for the Boom , but it operates reversed, change from A & B to B & A


Once you have everything figured out get colored wire tie wraps. Red, Blue, Black, and Yellow. us these to match the coupler to hose.
Convention is:
Blue head end of boom cylinders
Red rod end of boom cylinders
Yellow head end of bucket cylinders
Black rod end of bucket cylinders