Troubleshooting Engine Overheat on Wheel Loader Liugong Type 856H

Raihan Trinanda Agsya (Program Study Heavy Equipment Engineering, Mechanical Engineering Department, Politeknik Negeri Jakarta, Jl. 1Kembangan. Siwabessy, Kampus UI, Depok, 16425)
Shafa Nisrina (Program Study Heavy Equipment Engineering, Mechanical Engineering Department, Politeknik Negeri Jakarta, Jl. 1Kembangan. Siwabessy, Kampus UI, Depok, 16425)
Rahmat Noval (Program Study Heavy Equipment Engineering, Mechanical Engineering Department, Politeknik Negeri Jakarta, Jl. 1Kembangan. Siwabessy, Kampus UI, Depok, 16425)
Hong Yue (Program Study Applied Technology of Contruction Marchinery, Departement School of Automotive Engi-neering, Liuzhou Vocational and Technical College, Shewan Rd, Yu Feng Qu, Liu Zhou Shi, Guang Xi Zhuang Zu Zi Zhi Qu, China, 545005)
Andrian Pratama Batistuta (Program Study Energy Conversion, Mechanical Engineering Departement, Universitas Pembangunan Na-sional Veteran Jakarta, Jalan RS. Fatmawati Raya, Pondok Labu, Cilandak, South Jakarta City, Jakarta 12450)
Seto Aji Santoso (Program Study Energy Conversion, Mechanical Engineering Departement, Universitas Mercu Buana Jl. Meruya Selatan No. 1, Kembangan Jakarta Barat 11650)

Recent in Engineering Science and Technology
Vol. 2 No. 3 (2024): RiESTech Vol. 2 No. 3 Years 2024

The Liugong type 856H Wheel Loader unit was donated by PT. Liugong Machinery to Liuzhou Vocational and Technical College (LVTC) as part of a collaborative effort to support teaching and learning activities at LVTC. During practical use, this Wheel Loader unit experienced engine overheating. The aim of troubleshooting the engine overheating issue was to identify the root cause of the problem. This research was conducted using direct observation methods, specifically employing a 7-step troubleshooting approach. The research findings indicate that the engine overheating in the Liugong type 856H Wheel Loader unit was caused by a malfunctioning thermostat component. According to specifications, the thermostat should begin to open at a temperature of 78°C and fully open at 92°C. However, upon inspection, the thermostat did not open until the temperature reached 90°C. This prevented coolant from flowing to the radiator for cooling. As a result, the hot coolant continued to circulate within the engine, leading to engine overheating. The corrective action taken was to replace the faulty component.