Go BottomJohn Deere 790 Tractor Loader Lift Problems
 | freonkid
Join Date: Jun 2010 Posts: 4 Williamsportmd 
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2010-06-13 171521
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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 | auerbach
Join Date: Sep 2007 Posts: 2168 West of Toronto 
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2010-06-13 171522
Don't understand works OK when tilted. ....
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| freonkid
Join Date: Jun 2010 Posts: 4 Williamsportmd
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2010-06-14 171523
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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Add PhotoJohn Deere 790 Tractor Loader Lift Problems
| jdgreen
Join Date: Jul 2003 Posts: 232 Maryland
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2010-06-14 171544
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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