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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Air in hydraulics on Oliver 1755

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R Gregory

11-13-2006 17:57:15




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I recently purchased an Oliver 1755 from an auction. I just moved to the country and wanted a tractor and loader (Koyker K5) to work around the farm. After getting the tractor home and I was using the hydraulics, they made a horrible noise. When I checked the dip stick, there was air in it. I had my father-in-law come over and we found the lines going in and out of the hydraulic cooler unit cracked. I replaced them and we checked the rest of the tractor over and found no additional leaks. I replaced all of the hydraulic fluid. The loader grinds and whines when I lift it. The 3-point does too. When I first got it home the loader would lift the front end off of the ground easily. Now, it doesn't have near the power and it barely gets the tractor off the ground. This is my first tractor and anyone's help would be greatly appreciated. Please help!!

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J Schwiebert

11-13-2006 18:08:35




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 Re: Air in hydraulics on Oliver 1755 in reply to R Gregory, 11-13-2006 17:57:15  
I don't know for sure the serial number of your tractor BUT for the first thing did you loosen the air bleeder screw on top of the filter after you refilled the hydraulic unit? Also did you change filter? A clean filter is a must on this setup! This tractor like many other tractors uses an axial piston type hydraulic pump. They do not like air and air will and can cause premature pump failure. Also 10 micron filters are the norm for an axial piston pump. Also make sure the breather on your hydraulic unit dipstick is clean. And easy check is let the dip stick loose and see if the noise goes away. Start there and if you have more questions get back with us. I always though a 1755 was a nice tractor. J.

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