Studi Kasus Modifikasi Pengganti Salenoid Elektrik Governor Diesel Menggunakan Aktuator Bertipe Single Acting Pada Manlift Di Pt Xyz

Pambudi, Fajar Setyo (2026) Studi Kasus Modifikasi Pengganti Salenoid Elektrik Governor Diesel Menggunakan Aktuator Bertipe Single Acting Pada Manlift Di Pt Xyz. Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

This study purpose to design and analyze a diesel engine speed (RPM) control system on a JLG 860SJ manlift by modifying the replacement of the electric solenoid governor with a single-acting hydraulic actuator. The main problem addressed in this study is the failure of the solenoid governor to respond to throttle input, as well as the limitation of the shutdown solenoid which is prone to overheating. The research method includes system design, fabrication, implementation, and testing, consisting of performance, durability, and response tests. The system is designed by utilizing the existing hydraulic source without major modifications. The single-acting actuator is selected due to its simple construction and suitability for producing linear motion in the governor mechanism. The results show that the actuator is capable of generating a force of approximately 1.04 kN and operates effectively under idle (±1000 rpm) and full throttle (±1800 rpm) conditions. The response time ranges from 0.7 to 1.1 seconds, with stable performance up to 2000 operating hours. However, at 3000 hours, performance degradation occurs due to seal wear. In conclusion, the system is feasible as an alternative to replace the solenoid governor due to its reliability and ease of maintenance, although it does not yet support gradual RPM control.

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