[abigpicture]

i have plenty of fluid but it has been near zero for a little while.
tractor has no hydraulics and transmission lever goes back and forth with no pressure or affect.

 

[shadetree]

Before it got so cold it performed correctly?

 

[abigpicture]

yes then today i started to plow and nothing.

 

[KB]

my first thought in the connection from the driveshaft to the hydrostatic pump.

 

[abigpicture]

??? kb what would happen???

 

[abigpicture]

kb hydraulics are completely dead.... is there a fuse or anything??

 

[abigpicture]

tractor moved about 2 feet then nothing...

 

[coalminer16]

What oil is in there? Could be the oil is so thick it isn't getting picked up in the suction hose. Also-does the suction hose have the internal spring to prevent it collapsing? Is there any chance the reliefs on top of the pump are pushed in?

Couple other things-is the drive shaft spinning? There is a rubber connection that can fail overtime (mine did last year). You would tend to notice and it wouldn't come back like it is. There is a pin in the pump as well that if it shears it won't pump. But again-it won't come back once in a while. I am thinking this is an oil supply issue. Also-how much oil is in there.

 

[abigpicture]

plenty of oil ..... have to check drive shaft....

 

[abigpicture]

started it up and moved it 20 ft..... however no power steering or other hydraulic uses

 

[KB]

Jd parts shows the rear yoke being splined onto the pump. I was thinking of a pinned connection, but it looks like two bolts #9 clamp it on.

It could be your pick hose collapsing, or you hydro release in the 1/2 way position. Bolt are easier and cheaper to fix.

 

[jeff_kluewer]

Could be water in the oil and is now frozen at the pickup hose???

 

[mikeduwe]

Sounds like my 420 this fall.

If the fluid is unknown or could have water in it, change that and the filter.

And inspect the suction hose that is on the front of the case that goes up to the pump. Any holes or splits and it will just suck in air.

KB, if the hydro release was the issue the hydraulic lift and steering would still work I would think as they are only for forward and reverse? But maybe it dumps all pressure when they are pushed down?

You could also have a broken pressure relief spring on the pump.

 

[KB]

Mike,

Thats what I was thinking at first, but then I looked at the release valves on JD parts and they looked like they are on the pump chamber, not the lower hydrostatic drive section, so I wasn't sure of my thought process, which left them as a possibility to me. My 140 has a loader, so I do not have any tractor to test if all function is lost with the release valves, or just the drive.

 

[abigpicture]

thanks all!!!!!

 

[abigpicture]

can any of you describe where I can drain the hydraulic fluid? or maybe have a diagram of it?

john

 

[chuckv]

John,

All of the information you seek is in the Operator's manual, but here is an excerpt that should get you started...

Chuck

 

[abigpicture]

ok so i did what i coined as operation "baby bottle". I warmed up a quart of trans fluid to about 150 degrees. I then poured it in. Viola! success immediately!!!!

thanks for the input!!!