굴착기용 엔진 Caterpillar C7.1

The Cat® C7.1 is a modern 7.01-liter inline six-cylinder electronic diesel engine, specially engineered for Caterpillar new-generation medium construction machinery. Equipped with high-pressure common rail fuel injection and twin turbo aftercooler system, this power unit delivers outstanding low-speed torque, superior fuel efficiency and extreme durability for heavy-duty construction, farming, land clearing and industrial power applications.
Two emission versions are available: EPA Tier 4 Final with complete aftertreatment system and EPA Tier 3 low-emission model, fully complying with U.S. federal import regulations for American buyers.
Core Technical Advantages
Legal EPA Compliance for US Import
Original US-spec CAT C7.1 engines are fitted with factory permanent metal EPA emission labels.
Tier 4 Final version: Equipped with DOC, DPF and SCR urea system, meets the strictest U.S. off-road emission standards, can be imported and operated legally across all U.S. states without modification.
Tier 3 version: No complicated urea aftertreatment; units manufactured over 21 years qualify for EPA exemption during customs clearance.
No risk of port detention, fines or forced return after ocean shipment.
Strong Low-Speed Torque & Low Fuel Consumption
Twin turbocharging and precise common rail injection enable peak torque output at only 1400 rpm, providing powerful digging and hauling performance under full load. Optimized combustion design cuts fuel consumption by 6%–10% compared to older C6.4 engines, greatly lowering daily operation costs for farm and construction owners.
Compact & Rugged Construction for Harsh Working Conditions
Cast iron reinforced cylinder block, heavy-duty two-stage air filter and upgraded cooling & lubrication circuits resist dust, mud and long-hour continuous operation. The compact overall size perfectly fits the engine bay of new CAT GC series excavators without structural modification.
Universal OEM Matching & Easy Maintenance
Direct factory replacement power for CAT 323GC, 326GC and other new medium excavators. All wiring harnesses, mounting brackets and interfaces are fully original matching. Genuine CAT spare parts are widely stocked throughout North America, minimizing machine downtime and repair expenses.