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Tractor Talk Discussion Board

White 2-85 Hydraulic Pump

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Posted by Trevis on March 03, 2013 at 19:16:53 from (

Wondering if anyone can Help? I have a 1981 White 2-85 with 8500 hours. The Hydraulic pump quit working, just prior to this happening, the pump started making a noise as if it was starving for oil. I installed a new (re-built) hyraulic pump, but the noise coming from this new pump is the same as before (like it is starving for oil and chattering). I've replaced the oil filter and used fresh oil, I'm using a 22 weight hydrauilic oil since it is wintertime. There is a butterfly valve on the oil filter head that is used for bleeding out the air. When I crack this valve open the noise stops but I have no hydraulics at all. When I tighten this valve the starving noise starts and I have minimal hydraulics. Also, when I pull the dipstick to check the oil, the oil is foamy/bubbly like it is getting injected with air. I have been told by my local dealer that there is no lift/charge pump in this model of tractor. Also I've been told there is no other oil filters to change. This model has a seperate oil resevoir that holds 32 litres (7 gallons) of oil. Can anyone explain what I should try next?


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