Jerry Simcik
Member
Alright, first, a bit about the tractor. It's a 1971 model with a gas engine. It has a loader on it, which is T-ed into the hydraulic line that runs around the back of the seat for a supply and then returns to what used to be a plug to the left of the filler tube.
The pump whines a bit, like it's low on fluid. According to the fill tube, it's not low. It acts like it is pumping fluid all the time, and it heats up quite a bit, and does so very quickly, even if the tractor does nothing but sit there and idle.
So, we tried to check the compensator valve. We removed it (Why does everyone seem to think this is hard?) and cleaned it. It seemed free to begin with, and cleaning it made no change. We cleaned both the spool in the valve itself and the spool in the main valve body.
Then we removed the low pressure valve. It looked brand new. We cleaned it off and replaced it. Nothing changed.
We stopped the tractor, and opened to air bleeder again, then fired it back up. When I held the loader valve in the "curl" position, the noise nearly went away. In any other position, it made noise.
In checking for other times when this noise went away, I turned the wheel all the way to the left. After doing this, the wheel will not turn right! Is this related to the original problem, or is it due to being turned too far left?
I've got a pressure gauge on the way, but it's not here just yet.
What else could it be? In another thread, someone mentioned that the 3-point arms should have 1 to 1.5 inches of travel (I assume this means in addition to slack in all the joints?), even when it's fully raised? If that's the case, then this may be our problem. Our 3-pt lift arms are solid when they are fully raised. There is no give in them at all...
Thanks!
The pump whines a bit, like it's low on fluid. According to the fill tube, it's not low. It acts like it is pumping fluid all the time, and it heats up quite a bit, and does so very quickly, even if the tractor does nothing but sit there and idle.
So, we tried to check the compensator valve. We removed it (Why does everyone seem to think this is hard?) and cleaned it. It seemed free to begin with, and cleaning it made no change. We cleaned both the spool in the valve itself and the spool in the main valve body.
Then we removed the low pressure valve. It looked brand new. We cleaned it off and replaced it. Nothing changed.
We stopped the tractor, and opened to air bleeder again, then fired it back up. When I held the loader valve in the "curl" position, the noise nearly went away. In any other position, it made noise.
In checking for other times when this noise went away, I turned the wheel all the way to the left. After doing this, the wheel will not turn right! Is this related to the original problem, or is it due to being turned too far left?
I've got a pressure gauge on the way, but it's not here just yet.
What else could it be? In another thread, someone mentioned that the 3-point arms should have 1 to 1.5 inches of travel (I assume this means in addition to slack in all the joints?), even when it's fully raised? If that's the case, then this may be our problem. Our 3-pt lift arms are solid when they are fully raised. There is no give in them at all...
Thanks!