Express diagnostics of power transmission systems of mine excavators
Abbos E. Salimov, Sergey L. Ivanov, Daniil A. Shibanov
Empress Catherine II Saint Petersburg Mining University, Saint Petersburg, Russian Federation
Mining Industry Journal (Gornaya Promyshlennost) №5/ 2026 p. 107-113
Summary: In conditions of intensified mining operations, the EKG-20K open-pit excavators in Uzbekistan and Russia demonstrate high levels of unscheduled downtime for their pressure and lift drives, accounting for 36–44% of the total equipment downtime. Traditional preventive and predictive maintenance methods fail to provide the required level of availability. This paper proposes a Conscientious Maintenance and Repair concept that integrates an adapted Fine-Kinney method with express field diagnostics of oil and an algorithm for a comprehensive assessment of the technical condition. The integrated algorithm automates the Diagnostic Trouble Codes (DTC) and the Equipment Health Index (EHI). A key indicator of the technical condition is the content of iron, zinc, and phosphorus in the oil, which enables prediction of failures with a high degree of probability. The system includes a five-stage analysis procedure, a unified DTС system, and a risk assessment matrix in accordance with GOST. Implementation of the Conscientious Maintenance and Repair System ensures an increase in the fleet availability up to 0.9 and a reduction in unscheduled downtime by 20–30% without increasing costs, as well as a 19.7% increase in the service life of the lift and thrust gearboxes
Keywords: mining excavator, express diagnostics, oil cleanliness, CM&R, risk of failure, thrust gearbox, lift gearbox, FineKinney, mechanical impurities, maintenance and repair, Equipment Health Index
For citation: Salimov Abbos E., Ivanov Sergey L., Shibanov Daniil A. Express diagnostics of power transmission systems of mine excavators. Mining Industry Journal (Gornaya Promyshlennost). 2026;(5):107–113. https://doi.org/10.30686/1609-9192-2026-5-107-113
Article info
Received: 26.05.2026
Revised: 23.06.2026
Accepted: 16.07.2026
Authors info
Salimov Abbos E. – Postgraduate Student, Department of Me- chanical Engineering, Empress Catherine II Saint Petersburg Mining University, Saint Petersburg, Russian Federation; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Ivanov Sergey L. – Dr. Sci. (Eng.), Professor, Department of Mechanical Engineering, Empress Catherine II Saint Petersburg Mining University, Saint Petersburg, Russian Federation; https://orcid.org/0000-0002-7014-2464; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Shibanov Daniil A. – Cand. Sci. (Eng.), Associate Professor, Department of Mechanical Engineering, Empress Catherine II Saint Petersburg Mining University, Saint Petersburg, Russian Federation; https://orcid.org/0000-0002-6203-0219
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