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John Deere 410 Backhoe Hydraulics
|Randy||Everything worked fine, put in barn and next time no hydraulic pressure for loader,backhoe and steering.Tractor will move but that is it.Any suggestions would be appreciated.
|Dale||Randy; The transmission oil pump operates the clutch packs in your transmission. It also provides a charge oil for your radial piston pump in front of your engine.
If it worked fine when parked then possibly your stroke control valve solenoid is stuck or it may have a mechanical t screw. The stroke control valve in the front and bolted by 4 bolts onto your main hydraulic pump.
The de stroke solenoid is to start the machine when cold and it routs oil to the case of the pump which de strokes the hydraulic pump.
There are more of those than any other cause of loosing hydraulics on a John Deere. Check the voltage on it when your starting the tractor and as it is running also. When voltage is going to the solenoid the hydraulic pump is shut down.
If there is no voltage present while the tractor engine is running pull out the cartridge valve and install new O-Rings into it.
If that doesn't get the pump working let us know on the forum and we can go to next step. Make sure you have changed the transmission and hydraulic filters. Do not throw them away. Cut the ends off the elements and unfold the element and look carefully at the outside of the filter material. If the groves are clean then no problem, if they have pieces of O-Rings or metal you will find your problem.
Like I said let us know after you check the stroke control valve de stroke solenoid.
|shelly||My backhoe was stuck on an angle, left overnight and then hydraulic where weak after getting out. Changed filters and one as busted, the online was bad, changed it and still very weak. Could a piston be stuck in one of the filter systems? Would it cause the lack of lift pressure?
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