Posted by ThePiddler on September 11, 2015 at 12:13:11 from (108.206.245.88):
Please help!
I have a 2000 Ford (4cyl diesel) tractor. Hydraulic lift had been working erratically for a while but then a couple of months ago it just quit lifting altogether and I am just now getting around to trying to figure out what to do with it. I have spent several days researching this problem and after trying all of the following, I run out of things to try. Please help!
First, an issue of milky hydraulic fluid was corrected by draining & flushing with new fluid and then refilling to the fluid level test port on the right side of tractor (does not have dip stick). Removal of the plug on the hydraulic pump at first revealed very little erratically spurting fluid with tractor running so after replacing plug, I made several attempts to pressurize the system (at fluid level test port) in an unsuccessful attempt at priming the pump. (This was done while moving the lift lever up and down with engine off and also while running). Next, after replacing the test and fill plugs, I tried to pressurize the system by sending air pressure backwards to the reservoir thru the plug port on the hydraulic pump. My theory was that if the screen was blocked, this pressure would free the blockage as well as pressurize the system and in return force the fluid back up thru the pump – still no fluid at the pump (multiple times with engine on and off). After pouring several ounces of fluid into the pump (using a fill hose at the plug port) both with and without being followed with air pressure, I could hear the air going into the reservoir but again after multiple attempts with engine on and off – still no fluid at the pump, not even the original “erratically spurting fluid”. I don’t know if this has anything to do with the issue or not but I have also found that the draft control lever will not move to the upwards position that’s shown in many of the online pictures I can find. It seems to only have about ¼” movement in either direction but I am not familiar enough with this particular unit to know if that is natural or what. I would appreciate any ideas that might prevent me having to do a possibly unnecessary surgery on this thing! Thanks in advance.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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