This OTTO OEM-grade full 4HK1 diesel engine assembly is a direct replacement power unit exclusively engineered for Hitachi ZX210LC-3, ZX240-3 and ZX270-3 medium crawler excavators, adopting original Isuzu AH-4HK1X four-cylinder water-cooled common rail turbocharged structure. Pre-assembled with cylinder block, cylinder head, turbocharger, intercooler, high-pressure fuel injection system, cooling & lubrication modules, wiring harness and flywheel assembly, it provides stable low-speed high torque to drive full hydraulic systems, perfectly restoring original machine performance for earthmoving, quarrying and municipal heavy-load construction work.

This OTTO full diesel engine assembly with OEM number 4635922 adopts Yanmar original 3TNV88-SHB three-cylinder water-cooled power structure, specially made as replacement repair parts for Hitachi ZX27U-2 and ZX30U-2 compact mini excavators. The whole unit comes pre-assembled with cylinder block, cylinder head, fuel injection system, cooling pump, lubrication components and flywheel, offering one-stop power replacement to restore full machine performance for landscaping, indoor demolition and narrow-site municipal work.

This OTTO Japan-grade brand new 4JG1 full diesel engine assembly is a complete engine replacement unit tailored for Isuzu mini excavator overhaul projects. It adopts original Isuzu inline four-cylinder four-stroke water-cooled structure, equipped with full matching accessories including cylinder block, cylinder head, fuel injection pump, turbocharger, water pump, oil pump and flywheel assembly. It delivers stable, low-vibration power output for 6–8 ton small excavators, perfectly replacing worn-out original engines to restore full machine working performance at construction, landscaping and municipal sites.

This OTTO heavy-duty engine radiator with OEM part number 4649913 is a core cooling assembly exclusively matched for Hitachi ZX330-3, ZX330-3G, ZX330-5G and ZX350H-5G medium-large excavators. It forms a closed coolant circulation loop to rapidly dissipate engine heat, stabilizing operating temperature and avoiding overheating during long-hour heavy-load digging, mining and earthmoving tasks.

OTTO Heavy Duty PCV Housing Assembly (8-97085347-0) is a professional engine component designed for Isuzu crankcase ventilation systems. It stably controls crankcase gas circulation, effectively avoiding internal pressure buildup and ensuring standard engine breathing during heavy-duty working conditions.

OTTO Crankcase Ventilator Assembly (8-94329549-0) is a professional replacement spare for crankcase gas venting. It works steadily to release excess gas inside engines and maintain normal internal pressure for Isuzu 4LB1 and TCM equipment.

This engine assembly delivers high torque and stable power output, perfectly coping with heavy loads of engineering operations. It runs steadily even during long-time continuous work.

This compact diesel engine delivers steady power and compact layout, perfectly matching the structural characteristics of mini excavators. It runs efficiently under frequent start-stop and light-to-medium load conditions.

This diesel engine assembly runs with stable power output and efficient combustion. It provides dependable power for various excavators and construction equipment under regular working loads.

Made in strict accordance with OEM standards, this QSK19 diesel engine delivers ample and steady power. It fully meets the power demands of large excavators during continuous heavy-load operation.

This genuine engine assembly follows original production criteria, delivering strong and consistent power. It ensures reliable operation for excavators during prolonged heavy-duty tasks.

This M11 diesel engine assembly adopts solid build and premium internal parts. It provides powerful and steady power output to support long-time heavy-duty operation of excavators.