تأثير ساعات العمل على الخواص الفيزيائية-الكيميائية لزيت الهيدروليك للساحبات الزراعية

Abstract EN

The experiment was carried out on tractors type KOTI model 2013 belongs to North Oil Company/Kirkuk to study the effect of operating time at several levels: 100, 500, 1000, 10000 and 15000 hours of work in some hydraulic oil properties in the tractors.

These properties included: oil density, kinetic viscosity, viscosity index, water content for oil, flash point, volumetric ratio of sediment, ratio of solids - ash content, spill point, acidity.

The data were analyzed using CRD design with 3 replicates for all time factor levels.

The results showed that the hydraulic oil density decreased by increasing working hours and reached 0.834 g/cm3 at 15000 working hours.

The less kinetic density of hydraulic oil SWE20 Appeared at 100 Co, as started to collapse gradually by increasing working hours until it reached a minimum level for it 4.92 cts at 15000 Hour, while the least viscosity index reached to 121 at 15000 hours of work despite its declining, the moisture content was nil ppm, which is the best ratio of oils used to lubricate the hydraulic system.

The increasing of working hours showed stability in the flash point at 170 Co for the oil, The results indicated an increase in the percentage of sediment by increasing working hours by 0.079% at 15000 working hours, The ratio of solids and ash content increased with increasing working hours which is reached 0.328% at 15,000 hours.

The results showed that the oil doesn't affect by increasing working hours and kept its spillage values low and stable at extent–30 Co.

While the acidity increased by increasing working hours and the minimum value for acidity reached to 1.78 mg KOH/g oil at 100 working hours, in addition, the machines that works permanently within gas pollution zones led to increase the acidity in hydraulic oil and that affected to the all of the properties of hydraulic oil.