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Subject of the study was the analysis of power parameters of three prototype of agricultural tractors John Deere model 6830, prepare to rapeseed oil as a fuel, operated since three years on different farmsteads. Energy parameters were tested of engine supplied with this oil (RO), then a control test was performed on diesel fuel (NO), according to the standard EN 590. Power of the tested tractors powered by rapeseed oil in relation to diesel fuel at 1700 rpm was about 7–15 % lower. Total consumption of fuel for both testing fuels oil was about 24–26 kg·h–1 at 1600–1900 rpm. Based on gathered tests results, it was found that unitary consumption of fuel was higher by about 11 % than in case of diesel fuel.

Operational examinations of agricultural tractors John Deere 6830 supplied with rape oil