1123714700 Original Excavator Parts Crankshaft Pulley for ISUZU Engine 6BG1 

The Isuzu original engine crankshaft pulley (universal part number: 1123714700) is a core transmission component designed specifically for excavators equipped with Isuzu engines. This original spare part is mainly suitable for various brands of excavators equipped with Isuzu 6BG1, 4BG1T, 4HK1X and other series engines. The specific applicable models include but are not limited to: ZAXIS series such as Hitachi ZX200-3, ZX250-3, ZX330-3, as well as other brand models that may use engines of the same series.
 

The crankshaft pulley is a key hub of the front-end power distribution system of the engine, and its core function is to efficiently and synchronously transmit the rotational power of the crankshaft to auxiliary equipment such as the generator, water pump, air conditioning compressor, hydraulic steering pump, etc. through a multi wedge belt or V-belt. As an original component, it is usually made of high-strength cast iron or forged steel precision machining, and undergoes strict dynamic balance testing to ensure smooth operation and minimal vibration at high speeds. The wheel rim design has precise grooves that perfectly mesh with the belt, preventing slipping and abnormal wear.
 

To ensure the long-term reliable operation of the crankshaft pulley and the entire belt transmission system, regular inspections and preventive replacements are necessary. It is recommended to inspect the appearance of the pulley every 500 working hours, observe for abnormal wear, cracks, or deformation in the grooves, and check for signs of looseness in the wheel body. At the same time, check whether the drive belt is aged, cracked, delaminated, or excessively worn, and whether the tension is appropriate. It is usually recommended to check or replace the pulley and tensioner synchronously when replacing the belt to avoid early damage caused by improper fit between new and old parts.