9N Lift Issue starting point

[tagnamee]

Life is good when the old girl starts on the first crank, but lifting at her age has been difficult as years have progressed.

I"m hoping with a few descriptive words, someone like Zane can identify her symptoms and give me a place to start with out having to take everything apart.

Have a 4ft king cutter disc set attached to the 3pt hitch. Give her a start in the morning, about 65 degrees. Starts fine and idles nice. Engage the PTO and move the lift arm up, the lift arm starts to raise the disc set slowly and tops out at the lift limit. At this point the hydraulic starts pulsing and the discs set starts bouncing at the high limit. I slide it into gear and the hydraulic starts to lower by itself until the rpm"s come up while in gear.
Problems
1. Bouncing at the high limit
2. Raising slowly
3. Clutch disengaged or engine off, the hydraulic lowers by itself.
There are a few other inconsistentcies. Sometimes it cannot lift the load all the way to the upper limit. I can lift up on the disc set and "Help" the hydraulic lift up the disc set to the upper limit. Any idea"s on the diagnosis? Complexity of the solution?

This tractor is kept in a remote area and is used for food plots. I only see her about 4 times a year.

 

[TheOldHokie]

(quoted from post at 12:32:28 08/19/13) Life is good when the old girl starts on the first crank, but lifting at her age has been difficult as years have progressed.

I"m hoping with a few descriptive words, someone like Zane can identify her symptoms and give me a place to start with out having to take everything apart.

Have a 4ft king cutter disc set attached to the 3pt hitch. Give her a start in the morning, about 65 degrees. Starts fine and idles nice. Engage the PTO and move the lift arm up, the lift arm starts to raise the disc set slowly and tops out at the lift limit. At this point the hydraulic starts pulsing and the discs set starts bouncing at the high limit. I slide it into gear and the hydraulic starts to lower by itself until the rpm"s come up while in gear.
Problems
1. Bouncing at the high limit
2. Raising slowly
3. Clutch disengaged or engine off, the hydraulic lowers by itself.
There are a few other inconsistentcies. Sometimes it cannot lift the load all the way to the upper limit. I can lift up on the disc set and "Help" the hydraulic lift up the disc set to the upper limit. Any idea"s on the diagnosis? Complexity of the solution?

This tractor is kept in a remote area and is used for food plots. I only see her about 4 times a year.

1) Leakage in the lift circuit causing the position control to continually cycle to recover the height setting
2) Leakage in the lift circuit causing a loss of flow and lifting force
3) Leakage in the lift circuit causing the lift to drop when the pump stops supplying new oil.

Most likely leakage is from the lift cylinder inside the top cover. Remove inspection cover and operate lift looking for oil dripping from above. To repair replace lift piston, rings, and/or cylinder with new components. Simple and cheap repair that most 70 year old machines need.

TOH

 

[L.B,]

Internal bleeding, or if your lucky is fluid full? I looked at a 8N at a dealership just last month acted like that.I pulled dip-stick told salesman it needed oil 4 gals later it worked. It had a loader very jurkeeee and squaaaaaald fluid? what fluid? The engine had a knock and no oil pressure at gauge, shut it off, Sump had plenty of fluid!! it was mostly gas and looked like fuel oil. At my house fluids get checked first. You would think the salesman would have done that, lesson don't assume the salesman checked it. Master of the obvious L,B.