Analisis Kebocoran Seal Crankshaft Terhadap Mesin Caterpillar 3412 Dalam Menggerakkan Unit Top Drive
Keywords:
crankshaft, engine caterpillar, seal crankshaft, drilling.Abstract
The crankshaft seal plays an important role in maintaining the performance of diesel engines by preventing oil leakage and ensuring stable lubrication pressure. Leakage in this component can lead to disruptions in the lubrication system, increased engine temperature, and decreased engine efficiency. This study aims to analyze the effect of crankshaft seal leakage on the performance of the Caterpillar 3412 engine, particularly based on two main parameters: oil pressure and engine temperature within an engine speed range of 1700–1800 rpm. This research was conducted at PT. Tiga Musim Mas Jaya using an experimental method and paired sample t-test. Data were obtained under two test conditions: when the engine was in normal condition and when a crankshaft seal leakage occurred. The analysis was performed using a paired sample t-test to determine the significance of the differences. The results showed a significant decrease in oil pressure from an average of 70–82 psi to 36–56 psi after the leakage. Meanwhile, the engine temperature increased sharply from 76–88°C to 94–109°C. The calculated t-values for both parameters were much higher than the t-table value at a 5% significance level, indicating a statistically significant difference. Based on these results, it can be concluded that crankshaft seal leakage has a direct negative impact on the engine's lubrication and cooling systems. This disturbance not only reduces engine performance but also increases the risk of widespread component damage.
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