QSF 3.8 engine

QSF3.8 is a 4-cylinder, in-line, water-cooled, turbocharged diesel engine produced by Cummins. It is widely used in construction machinery, agricultural machinery, generator sets, forklifts, small excavators, air compressors and other equipment.

1. Main technical parameters
Parameter Value
Engine type Inline 4-cylinder, 4-stroke, turbocharged diesel engine
Displacement 3.76L (3760cc)
Bore × Stroke 102mm × 120mm
Compression ratio 17.2:1
Maximum power 74 – 130 HP (55 – 97 kW), depending on the adjustment
Maximum torque 406 – 488 N·m
Rated speed 2200 – 2500 rpm
Fuel system High-pressure common rail (HPCR) electronic injection system
Cooling method Water cooling
Boosting method Exhaust gas turbocharging
Emission standard Meets EPA Tier 4 Final / Euro V / National IV emission
Applicable fuel 0# or lower grade diesel
Lubrication system Oil pressure lubrication
Starting method Electric start
2. Main features
✅ High performance: turbocharging technology, strong power, suitable for high load conditions.
✅ Good fuel economy: High-pressure common rail fuel system (HPCR) is used to achieve more complete combustion and reduce fuel consumption.
✅ Emission compliance: It meets EPA Tier 4 Final, Euro V and National IV standards, and has excellent environmental performance.
✅ High reliability: Optimized design and materials improve durability and are suitable for harsh working conditions.
✅ Easy maintenance: The electronic control system reduces mechanical parts and reduces maintenance costs.

3. Applicable equipment (examples of some brands)
Construction machinery: Carter, Komatsu, Hitachi, Volvo, Xugong, Sany, etc.
Agricultural machinery: John Deere, Case New Holland (CNH), Leken, etc.
Generators: Cummins OEM and some domestic brands
Forklifts: Mitsubishi, Linde, Toyota, etc.
4. Maintenance recommendations
Oil replacement: It is recommended to replace it every 250-500 hours (depending on the working conditions).
Air filter: Clean or replace it regularly to keep the air intake smooth and prevent carbon deposits.
Fuel system: Use high-quality diesel, replace fuel filters regularly, and prevent injector nozzles from clogging.
Cooling system: Check antifreeze level, prevent overheating, and ensure that the water pump and radiator are working properly