656 Hydraulics

The hydraulic line from the pump on my Farmall 656 vibrates and has a humming noise. Turning the wheels sharp left or right stops the humming noise. Is this normal or do I have a faulty valve or some other problem in the system?

Thanks for your response.
 
What are you calling the pump? The hand pump under the steering wheel? On the one we had the hydraulic lines that run up along the side of the hood were notorious for being noisy. Does everything work fine? Unless this is a new noise might just be the nature of the beast. Just make sure the lines are running through the separators/ isolators properly.
 

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