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T422417 Turbocharger for CAT C4.4 SPF343C — replacement for Caterpillar C4.4 engines in trailer-mounted pumpers. Monitor compressor surge, exhaust smoke, and slow boost response under transient loads as early wear indicators Plan replacement at scheduled service intervals to avoid engine derating and cascading damage Evaluate intake manifold gaskets and oil feed lines during turbo service for consolidated maintenance Scheduled replacement guidance and long-term supply commitment for aging SPF343C fleets included with shipment.