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All Journal Syntax Literate: Jurnal Ilmiah Indonesia
Cipta, Denny Hendra
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Humanities Education Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Blade Lift Hydraulic System Troubleshooting on Komatsu D70-LE Bulldozer (Troubleshooting Sistem Hidrolik Blade Lift pada Bulldozer Komatsu D70-LE) Cipta, Denny Hendra; Harun, Lisa binti; Manglili, Yosua Kombong
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v7i9.14909

Abstract

A bulldozer is one type of heavy equipment used for cutting, pushing, and spreading material. It has a blade on the front side whose movement is controlled by a hydraulic system. The movement of the blade, combined with the weight and travel momentum of the bulldozer, creates the mechanical power used in the bulldozer's function.. Problems occurring in the hydraulic system could render the bulldozer useless. In this study, a Komatsu D70-LE bulldozer unit's hydraulic system is experiencing low power and cylinder drift, where the hydraulic cylinder cannot maintain its floating position and tends to return to its full-length rod position, thus causing the blade to drop on itself. This problem is then traced through the troubleshooting method to find the cause and solution to the problem. The cause of the low power problem in the lift cylinder is that the components of the lift cylinder have been worn out and damaged, resulting in a pressure leak in the lift cylinder, which causes the blade to drop by itself (hydraulic drift). The troubling components are the wear ring seal, piston ring seal, o-ring, dust seal, and rod seal. The way to solve the low power problem in the lift cylinder is to replace the lift cylinder seal kit with a new set of wear ring seal, piston ring seal, o-ring, dust seal, and rod seal.
Perbaikan Blow-By Gas Engine Bulldozer Cat D3k-2xl Ramli, Ismail; Cipta, Denny Hendra; Munir, Hamka; Amin, Al; Walijan, Walijan
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i12.62749

Abstract

Blow-by is a condition in which combustion gases from the combustion chamber escape through the piston and piston ring gap into the crankcase. This symptom leads to reduced engine performance, increased fuel consumption, and accelerated component wear. This research aims to analyze the causes of blow-by in the Caterpillar D3K-XL Bulldozer engine and to determine the appropriate troubleshooting steps. The research methods include field study, operator interviews, and direct inspection of engine components such as piston rings, cylinder liners, and valves. The results indicate that the main causes of blow-by are worn piston rings and scratches on the liner wall due to insufficient periodic maintenance. Corrective actions were carried out through replacement of worn components, cleaning, and reassembly according to manufacturer standards. These improvements successfully restored engine performance and minimized the risk of further damage.
Analisis Penyebab Error Ca559 pada Excavator Komatsu Pc200-8m0 Melalui Evaluasi Kebocoran Injector Sistem Common Rail Cipta, Denny Hendra; Ramli, Ismail; Halman, Halman; Anggini, Canda Putri; Viddy, Arkas
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i12.62750

Abstract

Error CA559 on the Komatsu PC200-8M0 excavator is an indication of a drop in pressure in the common rail fuel system that can cause combustion failures, decreased engine performance, and increased emissions. This study aims to analyze the main causes of CA559 errors through a thorough evaluation of the condition of the fuel system, especially the injector components. The research methods include field observation, operator interviews, visual examinations, cut-out tests, as well as return flow measurements of injectors and supply pumps based on manufacturer's standards. The measurement results showed that the number 6 cylinder injector had a return flow value of 500 cc/min, far exceeding the standard limit of 180 cc/min, indicating a significant internal leakage. This condition causes unstable rail pressure, incomplete combustion, engine vibration, and the appearance of black smoke. Evaluation of other components such as inlet pressure, pressure limiter, and return supply pump shows that the results are still within normal limits. Thus, it can be concluded that the main cause of the CA559 error is an internal leak in injector number 6. Replacement of injectors and improved fuel quality control are recommended to prevent the recurrence of similar disturbances.
Co-Authors Amin, Al Anggini, Canda Putri Halman, Halman Harun, Lisa Binti Manglili, Yosua Kombong Munir, Hamka Ramli, Ismail Viddy, Arkas Walijan, Walijan