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