I borrowed a repair manual for a Leyland 284. I read the notes and reviewed the drawings a few times. I can tell you the casting for the top 3-point hitch arms on the tractor is very heavy. I removed the top of the lift arms from their pins and dropped them downward. I removed the 8 bolts on the top casting and rotated the casting up and clockwise setting it on the tool box. From there you can see the top of the valve assembly. There is a safety valve on the top-link assembly. The oil level was adequate. When I pushed the top-link plate inward on five attempts it stuck inward at least once. Maybe a lazy spring in that assembly. I also cleaned off some deposits on the outside of the top link area. I am not sure how to replace the spring in that assembly. My urgent need was to get the lift working again. I also noted that the LIFT lever might be out of adjustment and the valve assembly might not be traveling far enough to properly send the valve into lift mode. I loosened the Lift arm adjustment lock nut on the side of the control arm toward the rear of the tool box, turned the adjusting nut one turn clockwise, (located behind and slightly left of the back of the toolbox) then retightened the lock nut. I used "CASE IH Gasket Eliminator" to create a replacement gasket seal between the casting and the lower hydraulic unit. I was told an 1/8" bead is all it takes and then the pressure of the casting begins the sealing process. I snugged all the bolts and then torqued them evenly. I let the new gasket seal sit for about 20 minutes and tested the lift with power. No leaks and the lift reacted very snappy to the control lever being moved. I also check the lift in "draught" mode too and that worked. I repeated my testing several times and never did it fail. We will be testing with the plow on Tuesday afternoon.
If anyone has additional comments on this repair I am interested to hear them. I won"t be convinced that it"s 100% repaired until I have another 30 acres plowed.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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