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Callao Missouri | My uncle just bought an 1183 MF corn head and we adapted it to his 7720 JD Combine over the weekend. Problem accurse when the oil gets hot the combine no longer lifts the head. I am sure the hydraulic pressure is low from A, warn pump, or B, misadjusted pressure relief valve.
I need to know the location of the pressure relief valve and what the static pressure should be from the get go. I will TEE a gauge into one of the header lift hoses tomorrow but I need to be prepared with information so I can get him back in the field as quick as possible. Thanks Jon
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7720 Combine hydraulic pressure? How to raise it up?
