John Deere 790 Tractor Loader Lift Problems: John Deere Review  -- John Deere Tractors Discussion Forum and Review John Deere 790 Tractor Loader Lift Problems: John Deere Review -- John Deere Tractors Discussion Forum

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 06-13-2010, 21:52 Post: 171521
freonkid



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 John Deere 790 Tractor Loader Lift Problems

Iam experiencing lift problems with 419 loader. Problems started immediately after I performed an agressive plunge into a three foot high pile of moist red clay. Loader works ok when in tilt position.Will not raise bucket nor drive bucket down. Please help.






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 06-13-2010, 22:51 Post: 171522
auerbach



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 John Deere 790 Tractor Loader Lift Problems

Don't understand works OK when tilted.






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 06-14-2010, 06:11 Post: 171523
freonkid



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 John Deere 790 Tractor Loader Lift Problems

Clarification"works ok when tilted", I mean the tilt hydraulic cylinders work but the lift cylinders do not.This indicates either select controller problems or lift cylinder problems. I have removed the lift cylinders from the frame,leaving the hoses connected and the cylinder will not drive.






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 06-14-2010, 20:49 Post: 171544
jdgreen

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 John Deere 790 Tractor Loader Lift Problems

Have you checked the hydraulic quick couplers to be sure they are still plugged in tight? Try disconnecting and reconnecting them. Do you hear the engine labor when you try raising the loader? Does the joystick feel normal? No disconnected linkage? There is very little to go wrong with the selective control valve itself. If the lever is moving the spool valve, the oil should flow. As a test, you could disconnect the hoses to the tilt cylinders and plug in the lift cylinders to those couplers. Then see if the loader will lift.






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Discussion Boards > Active Subjects > Messages as Posted > John Deere Review Forum

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