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Hydraulic system diagnosis on a 100 please guys!!!! :)
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Posted by Patrick Martin on August 03, 2007 at 23:25:58 from (74.234.92.107):
Hey guys, I have run across another problem today while using my 100.
I picked up my set of discs and as usual went about my way to the garden to eat it up a little more but in the short distance from the "implement alley" (what I call it) to the garden I noticed the drawbar starting to quiver a little more than usual. This happens under load/when I pick something up and usually clears up if I open the gas up a little but this time it's gotten much worse and it seems to be taunting me to bust the wrench out on it. I lifted my discs, hopped off the tractor, and sat on them while suspended to see what it felt like. With me on it it drops a little but feels like it's lifting but then roughly every 10 seconds or so it "jolts", loses a half of and inch of lift or so then tries to catch up.
This is what I feel when I'm sitting on it. It's not such a sharp jolt or bounce with just the discs but with me on there I can feel it when it pulses like that.
After I get off I can hear the pump whine a little. It makes a sort of bree-bree-bree whining sound before it is quiet again. It's not loud but I am able to notice it. Has anyone had this type of thing happen before and know exactly what it is? Yes I have flushed the hyrdaulic box and cleaned the filter screen so it's not that. There is no water in this system as I've drained it many times while flushing it. THIS SYSTEM DOES NOT LEAK! I have no leaks at all.
Could it be the pump? if it is then how in the heck can you rebuld it? Do they make oversize impellers or something? Doesn't seem like much could go wrong with the pump. Could it be bypassing internally in the box? If so how hard is it to fix this? Do I need to add something to the oil like a thickener or Lucas or something? Would it help or at least serve as a diagnosis? Sorry for the mess again guys. I use this thing allot and I'm still working some of the bugs out.
Pat
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