During the use of the tractor, due to factors such as looseness, wear, deformation, fatigue, corrosion, etc., the working ability will gradually decrease or be lost, and the technical state of the whole machine will be abnormal. In addition, the working medium such as fuel oil, lubricating oil, cooling water and hydraulic oil will be gradually consumed, which will destroy the normal working conditions of the tractor and aggravate the deterioration of the technical state of the whole machine.
 
In order to keep the tractor in good technical condition and prolong its service life, the tractor must be properly operated, maintained and adjusted.