MODERN TECHNOLOGIES OF TECHNICAL SERVICE OF CATERPILLAR RUNNING PART

Many kinds of agricultural tractors, combines and road-building machines are equipped with a caterpillar running part. It gives the machines advantage in stability and cross-country ability, but possesses low operating life. During operation of the machine it is necessary to give special attention to diagnosing of the technical condition of the track assembly, and also bearing units of the basic rollers and the adjuster wheel. Usage of metal plated additives in lubrication promotes increasing of wear resistance of the parts working in cavities, protected from environment. For restoration of the worn surfaces and assembly landings it is recommended to use technologies of thermoplastic deformation and induction-metallurgical welding. The article presents description of technologies and equipment developed by the authors, supported by the results of tests and recommendations in the choice of optimum technological modes, contents of welding powders and metal plated additives for liquid and plastic lubrications. The measuring device brings from below to the chain. In this case the fixed measuring jaw is installed in contact with the first bushing of the chain section. For the retention of the entire device and guarantee of stable contact of the chain bushing with the measuring jaw, the locking lever is transferred via the cranking of the cam into the position, which ensures stable contact with the adjacent bushing. According to the calculation the movable measuring jaw is brought into contact with the surface of the eleventh bushing of the chain. The length of the controlled chain section is determined by indications of the basic and vernier scales, marked on the rod and frame of the movable jaw. Since both measuring jaws touch the edge bushings on similar sides, no additional measurements and calculations should be carried out. The conclusion about the technical state of the crawler chain is carried out through comparison of the measured values with the parameters of the technical requirements (2). The supporting and tension wheels and the rollers, each of them having site of rotation, usually presented as a pair of roller antifriction bearings, are used for construction of the chain contour in the