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  1. #1

    Join Date
    Apr 2001
    Posts
    14
    Location
    Central Indiana
    Tractor
    John Deere 4200

    Default Loader Leakdown

    Anyone got a good idea of what normal leakdown should be for a 4200 with a 420 loader? Mine seams to go down faster than I thought it should for a 2000 machine with about 150 hrs. I got the acceptance spec from my dealer. It says that it shouldn't leak down at the cylinder rod more than 5.9 inches/hour. To me that would be a LOT. I measured mine and it went down about 1.5 inches/hour while sitting with an empty bucket. I was using it the other day for kind of a scafold with my homeade fork attachment with a pallet on it. It dropped about a foot at the forks in about 30 minutes. Can anyone give me some feed back on what their tractor is doing??? Thanks in advance!


  2. #2
    Bronze Member
    Join Date
    Jul 2002
    Posts
    53
    Location
    Alabama
    Tractor
    JD4710

    Default Re: Loader Leakdown

    How about a stupid question. I read alot about loader leakdown, does this occur with the tractor running?

  3. #3

    Join Date
    Sep 2000
    Posts
    183
    Location
    Gig Harbor, WA
    Tractor
    JD 4200 hst

    Default Re: Loader Leakdown

    Matt & Au...as anyone on this forum will tell you: there are no stoopid queshtons et setra. By way of clarification, Matt, you didn't have your 4200 running while waiting the prescribed hour to measure bleed-down on the 420?? Any weeping around the cyl bodies or quick connex? I've never checked bleed-down on my 2yr/old 4200/hst/420fel/200+ tt. I guess shoveling horse pucky doesn't beg the need-to-bleed out of my cyls. However, now I'll have to test in case a problem may be specific to the 4200/420 breed. If the bucket is raised empty formaintenance or scaffolding, I jam a 4x4 or some sort of ****-for-stout bracer under the bucket. I just picture some hydr line busting or a pesky rat knawing a hose (joke)...anyway being flattened by a bucket is not fun, I imagine. Please let me know about your fork 'n pallet device. My 42's been a jewel.

  4. #4
    Platinum Member joecdeere's Avatar
    Join Date
    Apr 2002
    Posts
    674
    Location
    Cumming,Georgia

    Default Here\'s Deere\'s Measure

    Solution Number: 53760

    Doc ID: WX53760

    Solution Summary: Tractor Valve Leakage Rates When Equipped with Loader

    Publication Date: Apr 19 2002



    Complaint or Symptom: The boom or bucket cylinders extend or retract at an excessive rate



    Problem or Situation: The allowable valve leakage tolerance needs to be known to diagnose loader leakage problems. If there is a problem, the source of the leakage needs to be determined (valve or one cylinder or both cylinders).



    Solution:

    Use the specifications below in addition to DTAC solution # 50824 "Loader Bucket/Lift Cylinders Extend or Retract" for diagnosis on loaders listed below.

    70/410

    Lift Cylinder …….. 7.52"/hour maximum 3.76"/hour nominal

    Bucket Cylinder … 12.34"/hour maximum 6.17"/hour nominal

    420 & 70

    Lift Cylinder …….. 5.94"/hour maximum 2.97"/hour nominal

    Bucket Cylinder … 8.59"/hour maximum 4.30"/hour nominal

    430

    Lift Cylinder ……. 4.81"/hour maximum 2.41"/hour nominal

    Bucket Cylinder … 4.81"/hour maximum 4.08"/hour nominal

    460

    Lift Cylinder ……. 3.84"/hour maximum 1.92"/hour nominal

    Bucket Cylinder … 5.70"/hour maximum 2.85"/hour nominal

    520 & 521

    Lift Cylinder ………3.84"/hour maximum 1.92"/hour nominal

    Bucket Cylinder …. 5.70"/hour maximum 2.85"/hour nominal

    521 "B" Position

    Lift Cylinder ……. 3.03"/hour maximum 1.52"/hour nominal

    Bucket Cylinder … 5.70"/hour maximum 2.85"/hour nominal

    540 NSL

    Lift Cylinder ……. 3.03"/hour maximum 1.52"/hour nominal

    Bucket Cylinder…. 5.70"/hour maximum 2.85"/hour nominal

    540 SL / 541 NSL & 541 SL

    Lift Cylinder ……. 3.03"/hour maximum 1.52"/hour nominal

    Bucket Cylinder … 4.09"/ hour maximum 2.04"/hour nominal

    620 / 720 & 740 NSL

    Lift Cylinder ……. 1.89"/hour maximum 0.76"/hour nominal

    Bucket Cylinder … 3.17"/hour maximum 1.27"/hour nominal

    640 NSL & SL

    Lift Cylinder ……. 1.17"/hour maximum 0.47"/hour nominal

    Bucket Cylinder … 3.17"/hour maximum 1.27"/hour nominal

    725

    Lift Cylinder ………1.53"/hour maximum 0.61"/hour nominal

    Bucket (-5999)…… 3.17"/hour maximum 1.27"/hour nominal

    Bucket (6000-)…… 2.28"/hour maximum 0.91"/hour nominal

    740 SL

    Lift Cylinder …….. 1.17"/hour maximum 0.47"/hour nominal

    Bucket Cylinder … 2.28"/hour maximum 0.91"/hour nominal

    840 on 7000 Series Tractors

    Lift Cylinder …….. 0.93"/hour maximum 0.37"/hour nominal

    Bucket Cylinder … 1.72"/hour maximum 0.69"/hour nominal









    70, 440, 460, 520, 540, 620, 640, 720, 725, 740, 840, 410, 420, 430, 541, 521


  5. #5

    Join Date
    Apr 2001
    Posts
    14
    Location
    Central Indiana
    Tractor
    John Deere 4200

    Default Re: Here\'s Deere\'s Measure

    LazyK, I didn't have the tractor running. Although, I'm not sure it would make a difference if it was running or not? I guess it would depend on what is leaking. I've not noticed any external leakage anywhere in the hydraulics. About the forks. I've read some posts about them and I think most of you would like to see mine, not trying to brag or anything. I've never gotten the frame painted yet, so it doesn't look pretty yet and I don't have a digital camera, but will try to get a hold of one soon to get a picture or two to post. The forks are adjustable side to side and I can quick attach it to the loader in place of the bucket or on the 3 pth. I use them about as much as the bucket I believe. They're just a pair of well used forklift forks I bought for $50, but they're plenty for the 4200.

    Joecdeere, I have a DTAC from the dealer, but not the same one you posted. Mine has about the same spec on it though. Got a question for you though. Do you have any access to DTAC's on the 4200 Syncshift transmission problems? Mine has a problem shifting into gear sometimes.

    Thanks guys!

  6. #6

    Join Date
    Apr 2001
    Posts
    14
    Location
    Central Indiana
    Tractor
    John Deere 4200

    Default Re: Here\'s Deere\'s Measure

    Well today I disconnected the lift cylinders at the quick connects and then lifted a little weight by curling the bucket. The lift cylinders didn't move at all. That tells me that the leak is in the valve. I'll contact the dealer tomorrow and see what he says about it.

  7. #7
    Platinum Member joecdeere's Avatar
    Join Date
    Apr 2002
    Posts
    674
    Location
    Cumming,Georgia

    Default Re: Here\'s Deere\'s Measure

    Matt, send me your serial number, and which shifter isn't working right

  8. #8

    Join Date
    Apr 2001
    Posts
    14
    Location
    Central Indiana
    Tractor
    John Deere 4200

    Default Re: Here\'s Deere\'s Measure

    LV4200C327959 is the serial.

    My problem is with trying to go from one gear to another, like first to reverse. NOT the range lever. It seems like the clutch doesn't disengage totally. It's really bad when facing a downhill slope. Some tell me this is because all the oil runs to the front where the clutches are. It's always a little hard to get into gear while sitting on level ground to me. I moved some dirt over the hill behind the house and dumped it while sitting on the hill and almost couldn't get it into reverse to get backed up the hill. I found that if I sort of slam it from first to reverse it will go easier. My dealer says it's something I'll have to live with. He did have a used one there which I tried out to see if it had the problem and it did, but maybe not as bad as mine.

    Any help would be greatly appreciated.
    Thanks!

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