Cummins (NYSE: CMI) today announced the results of a Tier 4 engine teardown inspection undertaken to assess the in-service durability and achievable life-to-overhaul compared with the Tier 3 version of the engine. The disassembly and in-depth examination of a QSL9 Tier 4 low emissions engine at close to 10,000 operating hours revealed major components, fuel system, turbocharger and the block to be in near-perfect condition after three years of operation in a heavy lift-and-carry application.

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