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460 rear hydraulic bounce

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dudenhymer

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This is my father in laws tractor who is currently over seas. He gave me a crash course on how to operate it before he left. I don't know much about tractors so please bear with me.

It currently has a tiller hooked up to the 3 pt conversion hitch. While operating the rear hydraulics something strange is happening. It will raise up fine to whatever position but isn't able to hold its position without slightly dropping then bouncing back up. There is a leak coming from under the seat which I know is where the lines for the rear hydraulics run. It isn't gushing out but a slow seep.

I'm able to drive the tractor around and used the tiller yesterday. Just want to know if I'm maybe missing something or doing something wrong to cause the rear hydraulics to act like this. If it's not me then what could be wrong?? Thanks.
 

Does the hitch settle with the engine off?

If the seepage is coming from the raise side of the hitch circuit the hitch is settling and then correcting itself.

The condition is called "hiccuping".
 
Ya the hitch does settle with the engine off. Will the hiccping cause excess stress on the hydraulic pump and/or lines?
 
The slow leak is allowing air into the hydraulic system as the tractor sits.
Start the tractor & allow to warm up, cycle the hitch all the way up & all the way down several times to work the air out. Lower the hitch, shut the tractor off & fill the reservoir to the full mark on the dipstick. Re-start the tractor & raise & lower the hitch several more times, this should work any residual air bubbles out. WAH-LAH no more bounce.
 
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