IDENTIFIKASI PENYEBAB KEGAGALAN SISTEM KEMUDI PADA KENDARAAN BERMOTOR WAJIB UJI

The damage to the steering system is caused by a lack of awareness in maintaining and inspecting the steering system components, which can potentially lead to steering failure and poor driving habits. Drag link looseness is one of the failures that occur in the steering system. Many vehicles have failed the periodic inspection due to the loose drag link. Therefore, there is a need for recommendations for repairs and prevention. The researcher aims to understand the working mechanism of the steering system, analyze the factors causing failures in the recirculating ball type, and provide recommendations for repairs and prevention.
The research is conducted at the Vehicle Periodic Inspection Unit of Surakarta City and the Disassembly and Loading Workshop of Pendaringan in Surakarta City. The research method used in this study is FMEA (Failure Mode and Effect Analysis) to analyze and evaluate steering system failures and propose improvement steps for vehicle owners and additional spare parts for workshops under the supervision of the Surakarta City Transportation Agency. After determining the severity, occurrence, and detection to calculate the RPN value for steering system failures. The joint has an RPN value of 56, drag link with a value of 144, and tie rod with a value of 64. The risk level criteria for joint is low, drag link is critical, and tie rod is moderate.
The technical inspections and data from the periodic inspection certificate revealed that there were 32 vehicles that failed the periodic inspection due to steering system damage. There are three components in the steering system that are the major causes of steering system failures in motor vehicles in the Surakarta City Transportation Agency, namely the joint, drag link, and tie rod.
Keywords: Identification, Steering system, Steering failure, FMEA.