How much hydrilic oil go in 1020 jd tractor and where?

The hydraulic oil capacity for a JOHN DEERe 1020 tractor is approximately 7.5 gallons (28.4 liters). The hydraulic oil is added through the hydraulic reservoir, which is typically located under the seat or on the side of the tractor, depending on the specific model. Always refer to the operator's manual for precise instructions and specifications regarding oil type and maintenance procedures.