1066 hydraulics

Michael Sheik · Feb 24, 2011

I had issues with what I believe is low pressures on the remotes last year and wanted to look into it before summer hits. Basically, lifting a 14' heavy disk it is slow to raise with 4 inch cylinder unless you rev it up to pto speed and it will raise it up and a little faster. Also, when using on round baler it seems to lift the gate ok but it is leaking off a little and not keeping the tension on bale. everything is good on the baler so I am thinking the remotes are leaking past. Is it just as simple as pulling the guts out of both the valves under the seat and re-oringing them. You think that will cure it? Any suggestions. I haven't checked the pressures on the MCV yet so not sure that couldn't be part of the slow lifting.

Janicholson · Feb 24, 2011

Spool valves normally do not (cannot)leak past. If they are not centered, or in their hold position, they can bypass, or cause issues. Internal blown Orings in the piping and connections , or a pump sucking air/restricted intake, or worn, is a likely place to look. Jim

caterpillar guy · Feb 24, 2011

Take a pressure gage and plug it in to the lines on the SCV. Then with system warm and, at rated engine speed seewhat the pressure is with the lever pulled then check the other side and both valves. Should get around 2000 PSI or more.
If that is low your pump is suspect or the relief valve. If pressure is good let valve back to neutral with pressure on gage se if it bleeds off if so the valves need to be re o-ringed. That is a simple operation easiest done off the tractor.
With seat off the side plate removed 3 3/8ths bolts will remove the valves and the pins on the levers. Use a heavy rag around valve in vise to protect.

MN Scott · Feb 24, 2011

I agree with Janicholson. The valves will not cause your symptoms. The seals in the valves only prevent external leakage. It could be the pressure relief valve under the seat but most likely a worn rear hydraulic pump.

Owen Aaland · Feb 24, 2011

The MCV hydraulics are separate from the hitch. The failure to lift properly is most likely caused by a weak pump. As pressures go up the pump flow decreases.

The problem with the baler not maintaining pressure is either in the cylinder(s) on the baler or a auxiliary valve leaking past the spool lands. There is no repair for that valved problem other than replacement of the entire valve. Many balers have a double acting check valve mounted on the tensioner system to maintain the pressure rather than rely on the tractor control valve. If yours has a check valve that also may have failed.

1066 hydraulics

Michael Sheik

Member

Janicholson

Well-known Member

caterpillar guy

Well-known Member

MN Scott

Well-known Member

Owen Aaland

Well-known Member

Similar threads