The rational repair and maintenance cycle of the KamAZ car gearbox taking into account the pre-repair operating time

Abstract

A significant proportion of the costs and downtime for repairs are on transmission units, and especially on the gearbox (GB). Based on the research results presented in the work, up to 76% of all transmission failures fall on the gearbox of a KamAZ 6540 automobile under ordinary operating conditions. The purpose of the study is to justify the repair and maintenance cycle (RMC) of the gearbox of the KamAZ 6540 automobile, taking into account the pre-repair operating time. The proposed methodology for assessing the pre-repair resource allows you to select the resource elements of the gearbox, taking into account the value of their resource and coefficient of variation. The structure of the RMC proposed in the work provides for: the first current repair during running hours - 125940 km; first overhaul during running hours - 251880 km; second current repair during running hours - 377820 km; second overhaul during running hours - 503760 km. Thus, changing the structure of the gearbox REC allows increasing the gearbox resource from 380 to 500 thousand km.

Investigation of the Strength of Diffusion Coatings on Cast Iron Friction Pairs in Contact with Hard Abrasive Soil Particles

“…Piston rings of automotive diesel engines and compressors, parts of hydraulic cylinders are made of cast iron. Gears, crankshafts and bushings of a KAMAZ vehicle are also made of ductile iron [6].…”