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| I have a 4240 with 8700 hours. Between mostly 1100-1300 rpm the steering has a "buzz, vibration, chatter?" It has a loader and the loader works fine. Also the steering works fine, no wander or hard turning, etc. It does this after the oil warms up. When you are running the hydraulics for the loader, the chatter is minimal. I read that there are some filter screens in the inlets to the Steering valve (rectangular valve body just ahead of the firewall under the hood.) Could these be plugged and causing the problem? I have read in the tech manual that the valve and valve body are a unit, and have heard that the body if the ports are scored is not serviceable. Any suggestions? Thanks Much! |
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N Central IA | Yes the valve and body are a matched set, I have done a little polishing on the spool but thats about it. If the oil gets hot where you can't hold your hand on it I would look further otherwise I may just ignore the noise if everything works right. |
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Kittitas Co. Wa. State | Got an infrared heat gun ?? sounds like one of the problems I had,, blown "O" ring under the cab on right hand side. priority valve I beleive it was.
Get the oil up to operating temp and check all the hydraulic system you can get the gun on..
Oil should not vary more than 10-15 degrees till it's returned to the rearend.
The priority valve working property, will always default to steering and brakes over any other hydraulic draw.
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NW Ohio,near Findlay | Agree with 95h, a priority valve is blown somewhere. We have a 4020 with one bad on the rockshaft, line gets warm going to rockshaft not doing anything. I think you valve for the steering and brake is the one, wherever it is. |
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4240 John Deere tractor problem
