Farmall 560 Not moving fluid to hydraulic pump

Bzcole510

New User
Hi everyone, I have a Farmall 560 that has the correct amount of fluid and is not pumping fluid into the Hydraulic system. We lost all hydraulic power instantly in the field, and now there is no hydraulic pressure in any of the lines. Any suggestions or places I should look for wear? Pump and filter are okay looking and function
 
The pump is the only pump in the system. How are you determining that it is "okay looking" and "function(ing)?"

Nothing feeds it fluid. It is essentially submerged in the fluid so if it is functioning it should be picking up fluid and pumping.

It's internal so you can't actually see it work. Even if you pulled the pump out of the tractor a visual inspection of the outside of the pump isn't going to tell you that it is good or bad.

Does the tractor make any funny noises like humming or squealing that it wasn't before? Did it ever make such noises? Does the PTO work?
 
Normally when they just flat us and stop pumping while working you are doing some PTO work and the PTO stops and you also loose Hdy. as they are both driven off the same gear and shafts . So what USUALLY happens happens at the clutch or i should say the Pressure plate as it has hub riveted to it that drive the shaft that runs the PTO and hyd pumps as on a 560 ya have two , one for the P/S that is a piggy back to the main pump. The hub splines ware over time and in turn take the shaft with them . It also could be that the key on the pump shaft sheared or the nut came off and the gear fell off the hyd . pump . The easy check is drain the fluid and pull the pump and check the gear . If that is not the problem then it is split time and digging in the piggy bank for a new clutch pressure plate throw out bearing and pilot bear and a new PTO intput shaft seals bear and gskt.
 
It doesn't hum at all anymore, it used to
when it comes worked. I will take the pump
out and inspect it on the inside this time.
The pump moved freely when i took it out
 
In the link is the clutch pressure plate sold by YT for a 560.
The splines in the center hub is what strips as the Tractor
Vet has pointed out. The hollow drive hub that engages to
these splines drives the live PTO and the hydraulics.
Another smaller splined shaft sticks in the middle of the
hollow hub and engages into the machine drive clutch
plate.
YT 560 clutch pressure plate
 
Fill the pump up with diesel once out. Pump thumb over outlet. If you can turn pump it is worn out.
 

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