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| Hi, have you checked oil in it. to me it sounds like the pump is not getting enough oil to it. I would also look at the oil filter right under the relief valve housing i would try replacing that if it hasn't been done recently part number should be at120444 and hopefully that would solve it otherwise the book spec's say when oil is at 110-120 degrees and at working speed relief valve psi should be 3500-3600 if its under that i would look at seeing if the valve is scored or somethings obstructing it from moving the pump case drain should not exceed 4.2 gallons per minute at full pressure the book does not give a psi spec for the hydraulic pump but it should be 23 gpm at 2160 rpm if it were over that i would look and see how the pistons in the pump look if they are scored or not and how the swash plate looks. motor case drain should not exceed 1.8 gpm if that is more i would check the same things as on the pump. I hope this helps | |
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John Deere 1380 swather issue
