YA00049481 Original 4JJ1 engine assembly for excavator ZX130-5B

The original 4JJ1 engine assembly (part number YA00049481) is the core power unit provided by Isuzu for Hitachi's medium-sized excavators, mainly suitable for the 5th generation models of ZX130-5B, ZX130-5A, ZX120-5A and other series. This engine is also widely used in excavators of the same tonnage from brands such as Sumitomo SH120A5 and SH130A5. Its universal number YA00049481 is its unique identifier in Hitachi's original parts system, corresponding to the engine model Isuzu GJ-4JJ1XKSA-03. When ordering, the complete model, serial number, and engine identification code 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, which adopts a high-pressure common rail electronic injection system and a cold EGR system, and complies with China's non road country III/EU Stage IIIA emission standards. Main technical parameters: rated power of 69 kW/2000 rpm, maximum torque of 354 N · m, displacement of 2.999 L, cylinder diameter x stroke of 95 x 105 mm, compression ratio of 16.5:1. The overall size of the machine is approximately 655 × 840 × 805 mm, with a weight of approximately 270 kg. It adopts a DOHC top mounted double camshaft structure and timing chain transmission, with a spray pressure of up to 180 MPa. The cooling system adopts a new type of expansion tank to achieve automatic exhaust, and the engine water temperature is reduced by 4-7 ° C compared to traditional designs. It is compatible with Hitachi HIOS III hydraulic system and has a "digging speed increase system" and a "boom regeneration system" to improve operational efficiency and reduce fuel consumption.

Check the valve clearance (intake and exhaust valve standard 0.25-0.30 mm) and belt tension every 500 hours; Detect cylinder pressure every 1000 hours (standard value 2.8-3.2 MPa). Oil change: It is recommended to change the engine oil every 500 hours (or 5000 kilometers), using original CD grade or above 15W-40 engine oil with a filling amount of about 17 L. The coolant should be changed every 2 years (or 4000 hours), and the antifreeze concentration should be maintained at 30-60%; Replace HLP-V 46 grade hydraulic oil every 2000 hours. Filter: Clean/replace the air filter every 10000 kilometers; The diesel coarse filter should be replaced every two oil change cycles, and the fine filter should be checked for drainage every 200 hours. Electrical and cooling: Regularly check the radiator pressure cap (standard pressure 0.1 MPa) and cooling water quality; Disconnect the battery power cord during electrical maintenance. If there are problems such as difficulty starting, black smoke emission, power reduction, etc., the fuel injector atomization, cylinder sealing, and fuel system intake should be checked in a timely manner. It is recommended that professional technicians use original tools for maintenance to extend the engine life to 8000-10000 hours.