john deere 300b back hoe has no functions wont even travel

[rangerfan181]

john deere 300b back hoe has no functions wont even travel

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any help will be great
just got this hoe
the previous owner said hydr functions and the tranmission fwd and rev quit at one time
had a vibration and lost all function still starts and runs great with no noises but will do nothing
previous owner said that he knew it had a bad swing cylinder before all this happened
thank you