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These pumps are nice, because easy to install, just plugnplay. You can use them directly on the PTO-shaft of the tractor or mount them on the splitter as they are. Simple. But have a look at the max. pressure of these pumps. It's only 2250 or 2500 psi. - So, to get up to the splitting power you...

It's 16.77 tons:) If you go to a 4" cylinder, the splitting power goes down but the speed increases . No. The force only depends on the square measureof the cylinder and the pressure. The Volume (GPM) only has influence to the cycling speed.

Ok, all we need ... Let's say, working pressure shall be 3000 psi (207 bar). I wouldn't go higher with a DIY build. With this, you are nearest to the 22 ton with a 4.5" Cylinder: (sorry, I have to do it in the metric system) 4.5" are 114.3 mm dia and 57.15 mm radius Formular is...

A 4" Cylinder (inner dia), operated with max pressure of 2500 psi, has a maximum splitting power of 13,98 ton. If you want to run it with a cycle speed of let's say 6"/s (fast midrange) in splitt direction, you need 19,54 GPM and 25 kW (34 HP) at max pressure and flow. The speed is a very...

To move a cylinder from time to time, it's ok. As far as these 5 GPM should flow constantly, the charts you found are correct. The 1/4 lines are too small for that! Yes, absolutely

Well, you can do it with a 1/4", it'll work, but it doesn't make sense. At first, the backpressure that the lines/hoses build up by itself shouldn't be higher than the backpressure the Tool/device with no load (!) builds up. Second, the velocity of the fluid in (the most) tractor systems...

Did you check the power shift? Does it work? - The PTO ist engaded by hydraulik pressure,right? If yes, there might be a Problem with the gears that drive the pumps. Its the same for both pumps, I guess. Or both pumps suck the oil from the same line and that line is probably blocked.

That's a signal problem of the rear PTO shaft switch. If the wiring harness isn't connected or loose, the starter won't even crank. Same with the little switch on the left rear Fender, if there is one. It also can be a defective switch. Sometimes those switches are a bit tricky, when there are...

Thank you :)

Sorry, I can't tell you the exact gear ratio, but the ratio of the original tires is 1:1,363. - So the gear ration will be something like 1:1,39 The ratio of the tires you've on now is 1:1.459 . If you want to stick to the 235/85-16, you need bigger tires in the front. Like perhaps 175(/80)-12...

Sorry, do't know anything about that system. But one question: the green plug is connected to the valves of the third function? If so, the plug has to go to the Handle for the FEL in the Cab. This Handle must have one or two knobs/switches for the third function.

If you want to warm up the hydraulic-/transmission-oil a little quicker, just let one valve function run against the overpressure valve. For example, if you have an auxiliary hydraulic valve with a catch for one direction, use this during engine warm up. Because of the little extra work the...

My neigbour and I, with our two M4D-071s, know this noise very well. My one did it only a few times during the first 100 hours by hitting the break. But the one of my neighbour made this noise nearly every time the transmission warmed up to final working temperature. It sometimes was so loud...

Thanks for the statement. All true. Except: regeneration on our two M4 needs only 8-12 minutes at only 1600-1700 rpms. (4 times the last 250 hours) That's the point:) five times NO

3.: fuel pump control circuit / open

1.: Control Module internal ROM error 2.: fuel rail pressure sensor / low input 3.: fuel pump control circuit / open Looks like the fuel pump doesn't work any more.

which link is it? - Sorry, didn't found. Are there all Kubota parts-lists shown or only those from older tractors? I'm actually looking for a partslist and a WSM for a M4(D)-071 Traktor. Do I have a chance to find that somewhere? Thanks for any help.

YES The drop speed control is a simple "Throttle check valve" . The check valve blocks the oil-flow in one line from the cylinder to the system and parallel to this the throttle part regulates that flow in the second line. (all in a tiny valve block). So if you close that throttlevalve and...

Yesssss ....

Did you clean the the electrohydraulic Valve for the PTO? Maybe it stucks open because of filings. Is the PTO still engaged after you shut off the engine for some hours? (don't start, try to turn by hand)