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Dirty HYDRULIC FLUID in loader lines

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City Boy

06-01-2003 05:18:53

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Thanks for your help finding replacement hydrulic hose suppiers. While removing the old hoses I noticed the Hy. fluid is almost black with alot of grity stuff in it. I know it should be clear ...like it is in my hydrostatic transmission. The loader gets it's fluid from a line that attaches to the transmission. I don't understand why it would be so dirty. Below I ask questions & answer them based on my logic of the situation. Please correct me if that's not the way it works.

Question 1)does the Hy. fluid not circulate and only gets addional fluid from the intake line attached to the trans.?

if that's the case...Question 2) should I replace all the hoses not just the leaking ones and would that benifit my Hy. cyclinders & extend there life?

Question 3) My loader control panel often sticks (forward & back on the stick) & scares the heck out of me at times...the machine was stored outdoors by the previous owner. I might think to clean the shafts entering the controller...but fear it may effect the seal & begin to leak. I'm not sure what to do.
or it could be a mechanical issue outside of the controller. Any Help on this issue?

Thank you all in advance.
City Boy

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JMS/MN

06-01-2003 13:07:56

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Re: Dirty HYDRULIC FLUID in loader lines in reply to City Boy, 06-01-2003 05:18:53

First of all, if you are asking questions, identify the tractorloader you are asking about. Hydraulic fluid should be clean, not necesarilly clear. No grit in it. Most older tractors do not nave clear fluid in them. Hydraulic fluid does circulate, via the hydraulic pump- that is what gives the system pressure, and power to lift the loader, etc. Hydraulic systems do not have pressure without flow. A line attached to the transmission is not likely an intake line, it is a return line. There is no point in replacing a hydraulic hose unless it is leaking- and then, perhaps, you need only to replace the fitting on the end, depending where is it leaking. If you have grit in the system, it can affect the control valves, giving you the sensation of 'sticking'. You don't need to replace the seals on the hydraulic valves to correct a sticking problem, only replace seals when they are leaking. If draining and replacing hydraulic fluid does not correct the sticking problem, perhaps a teardown and cleaning of the valves is in order, since they can retain grit and interfere with proper operation.

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paul

06-01-2003 20:23:22

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Re: Re: Dirty HYDRULIC FLUID in loader lines in reply to JMS/MN, 06-01-2003 13:07:56

You will probably need to drain your hyd sytem a few times to get it cleaned out. most tractors have at least a screen if not a filter, you need to clean/ replace that. Some are far more difficult to get to.....

Replacing the hoses is not the thing to do. Replace the fluid, run the hydraulic systems a few days, replace the fluuid again - etc. Some folks have receipes of 'stuff' to put in to help flush the junk out, but that can be hard on your pump &/or your seals.

As to the hyd valve, does your valve have detents to hold the levers in the up or down postion? Some are built that way, others have adjustments to turn this feature on or off. Don't know how yours is built, but a thought....

Can't remember which tractor you have either... ;)

--->Paul

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