<![CDATA[General Background Portable screw compressors represent critical pneumatic assets widely utilized across demanding industrial field operations such as sandblasting and drilling. Specific Background Continuous high-load operation subjects these units to severe thermal stress, lubrication degradation, and component wear, leading to performance deterioration. Knowledge Gap Although maintenance procedures are recognized, comprehensive empirical evaluations detailing the systematic overhaul stages and specific valve degradation patterns for Ingersoll Rand 375 units remain limited. Aims This study aims to analyze the overhaul stages and identify potential component damages resulting from intensive field utilization in screw compressors. Results Technical observations and post-repair testing demonstrate that standard-compliant overhaul successfully restores operational air pressure, achieves thermal and rotational stability, and extends mechanical service life. Novelty This research provides a structured procedural breakdown of cylinder head dismantling and valve replacement within a commercial maintenance workshop setting. Implications Implementing structured overhaul protocols and routine maintenance practices prevents premature mechanical failures, optimizes operational costs, and ensures sustained reliability for industrial pneumatic systems. Key Findings Highlights Systematic overhaul execution successfully restores compressor operating pressure, working efficiency, and structural reliability. Post-repair testing confirms that engine parameters, including idling speed, working speed, coolant temperature, and oil temperature, operate within normal stable ranges. Intensive field utilization primarily causes thermal fatigue, carbon accumulation, and wear on critical components such as valves and cylinder heads. Keywords Screw Compressor, Overhaul, Ingersoll Rand 375, Machine Maintenance, Compressed Air]]>
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