Contamination of transmission and hydraulic oils in agricultural tractors and proposal of by-pass filtration system
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Kuupäev
2019
Kättesaadav alates
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Abstrakt
Tractors use various types of lubricating oils in transmission and hydraulic system.
Oils are contaminated by different ways depending on the work of the lubricated system. There
are general requirements on the cleanliness level of the oil in the tractor transmission and
hydraulic system according to the standard DIN 51524. According to all that, this paper presents
research conducted by two tractors. The tractor John Deere 8100 used only its own implements
(ploughs, trailers etc.) and it was operated in compliance with user manual. In this tractor, the oil
cleanliness level met the standard DIN 51524 because reached the stage 7 (NAS 1638). The
tractor Zetor Forterra 124 41 contained extremely contaminated oil, it reached stage > 12
(NAS 1638), due to the non-standard operation which was opposite to the user manual. Both ways
of tractor operation are typical for farmers activity in the Slovak Republic, depending on the
tractor type and style of agricultural production at most. The second part of this paper is aimed at
the proposal of by-pass filtration system to eliminate the oil contamination. The by-pass filtration
system is the second stage of the oil filtration in the tractor, whereas the first one means standard
tractor filter. Function of the system was tested according to the decrease of chemical elements
concentration characterising the oil contamination and visual method based on filter and its
change after operating of tested tractor. There was evaluated the decrease of concentration of Fe
(41.6%), Cu (28.7%) and Si (20.5%) after by-pass filtration system was running under operational
conditions. It can be concluded that the by-pass filtration system was proposed correctly and it is
suitable for tractors operation.
Kirjeldus
Article
Märksõnad
tractor oil, tractor maintenance, elimination of the oil contamination, quality of lubricants, articles