John Deere 4600 hydro questions

sqdqo · Jun 7, 2011

I have a JD 4600 hydro unit. A couple questions if anyone could offer advice or opinion.

When idling and an attachment is on the 3 point with it raised the 3 point is constantly losing pressure and correcting itself. What kind of job is it to repack or repair the hydraulics so it maintains level better. Or is it not worth repairing and just leave alone?

Also when idling fairly fast and in gear but foot not on forward or reverse pedal the machine will bump or move slightly like enough hydraulic is leaking to move it. What is causing this? Is there an adjustment or repair? How involved is it?

beenthere · Jun 7, 2011

Probably both are adjustments that can be made, the least being not worrying about it when idling.

Do you have the tech manual? There are troubleshooting suggestions and adjustments that can be made.

Does the 3 ph leak down when the tractor is off, and how fast if it does?

mjncad · Jun 8, 2011

How many hours on the 4600? Are you the original owner?

I'd spend the money and get the tech manual on CD as it's half the cost of the paper one and you can print out replacement pages as required when previous copies get torn and greasy.

The tech manual is worth the money. I have one for my 4200.

Getting at the 3-point lift cylinder is not going to be fun, and you'll need a helper (human or engine crane) to get the cover off.

Hopefully it just needs a couple of adjustments.

https://techpubs.deere.com/