Sorry that I'm no help. Whine to me could be sucking air. I had a whine develop in a tractor of mine and as it aged the whine got louder. In short, the steel hydraulic feed hose from the sump to the hyd. pump was connected via a rubber hose adapter which had cracked, letting air in at the pump inlet. Other clue was the loader operation got slower and slower, sometimes took minutes from start up till loader would move....not that way when new. Replacing the hose and burping, restored normal loader operation and got rid of the whine it developed.
Tx Jim might help you with ideas on what makes hyd. systems (in general) whine.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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