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In Reply to: NAA Hyd pump Loses Prime posted by Money Pit on Tuesday, November 26, 2013:
I've only had to work on my hydraulic system once and it was mostly just the select-trol valve. I changed the oil and bled the system at that time. I've never had to bleed it at any other time. My tractor was switched over to a piston pump some time prior to me buying it in 1992.
A few yrs ago my tractor sat unused for several months until I could replace a bad piston but when I put it all back together the hydraulics worked fine. I have a little trouble when the oil is real cold [below freezing] but the lift works fine once the oil warms up. It shouldn't need to be bled but once.
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