4612752 Original 4HK1 engine assembly for excavator ZX220-3

The original 4HK1 engine assembly (part number 4612752) is the core power unit provided by Isuzu for Hitachi's medium-sized excavators, mainly suitable for third-generation models in the ZX220W-3, ZX200-3, ZX240-3, ZX210W-3 and other series. This engine is also widely used in medium-sized excavators such as Sumitomo SH200 and SH240, and its universal number 4612752 is its only identifier in Hitachi's original parts system. When ordering, the complete model, serial number, and engine identification code (such as AI-4HK1X or AH-4HK1X) of the excavator must be provided for verification to ensure that the installation interface, control protocol, and emission standards are fully matched.

This product belongs to a four cylinder, water-cooled, four stroke, inline, turbocharged intercooled diesel engine. It adopts an electronically controlled high-pressure common rail fuel injection system and EGR exhaust gas recirculation device, which complies with the US EPA Tier 3/EU Stage IIIA emission standards. Main technical parameters: rated power 122-132 kW/2000 rpm, maximum torque 655-686 N · m/1500 rpm, displacement 5.193 L, cylinder diameter × stroke 115 × 125 mm, compression ratio 17.5. The overall size of the machine is approximately 1043.2 × 829 × 1011.8 mm, with a weight of 478 kg. It adopts a top mounted camshaft four valve structure, equipped with dual thermostats (opening at 82 ℃ on the intake pipe side and 85 ℃ on the exhaust pipe side) and an integrated oil pump. Its high-pressure common rail system can achieve precise control of fuel injection quantity and timing, improving fuel economy by about 10-15%.

Run in period: Avoid high-speed operation, sudden start and stop within 1000 kilometers of the new car, idle and warm up before operation. Regular inspection: Check the turbocharger rotor clearance (axial standard 0.06-0.09 mm, radial 0.10-0.17 mm) and pipeline sealing every 500 hours. Oil change: It is recommended to change the engine oil every 5000-10000 kilometers (or 500 hours), using original DH-1/CI-4 15W-40 engine oil; Replace the dedicated coolant every 2-3 years (or 40000 to 60000 kilometers); Replace UP46 grade hydraulic oil every 2000 hours. Filter: Clean/replace the air filter every 10000 kilometers; The diesel filter should be replaced every two oil change cycles. Electrical and cooling: Regularly check the radiator pressure cap and cooling water quality, and disconnect the battery power cord during electrical maintenance. If there are faults such as oil pressure alarm, black smoke, overheating, etc., the machine should be stopped in time to check the fuel injector, turbocharger sealing ring, and cylinder pressure (standard value 2.84-3.24 MPa). It is recommended that professional technicians use original tools for maintenance to extend the life of the engine.