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Case Mechanics Need Advice

Looking for some advice from a 90 series Case expert. My 4690's hydraulics are acting a little eratic. Sometimes the remotes will not work until you give the steering wheel a bit of a crank. At that point you can here the system prime up. Sometimes going down the field you can here it as well. Have had to the shop to check the pump, the pressure was a little low but should not be a problem. I am wondering could the 1st section of the 3 stage hydraulic pump, I think it is the charge pump, be starting to go.


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