1025667 Original Excavator Hydraulic Pump Swash Plate for ZX120

The original hydraulic pump swash plate part number 1025667 is the core regulating component in the dual variable piston pump of Hitachi ZX120 series excavators. It is mainly suitable for 12 ton medium-sized excavators such as ZX120 and ZX110, and may also be compatible with ZX series models of similar tonnage such as ZX130-5A. The inclined plate is usually installed in the variable mechanism of the hydraulic pump, working together with components such as the plunger, slide shoe, and return plate to adjust the pump displacement by changing the tilt angle, thereby controlling the speed and force of the excavator action. When placing an order, the complete model and hydraulic pump serial number of the equipment must be provided to ensure that its installation dimensions, ball and socket angles match the original pump assembly perfectly.

This product belongs to the precision hydraulic variable inclined plate, usually forged from high-strength alloy steel and subjected to carburizing quenching and precision grinding treatment to ensure wear resistance and dimensional stability under high pressure and high frequency swing. One side is a smooth spherical surface, which matches with the ball head of the slipper; The other side is equipped with a pin hole or ball socket connected to the variable piston. As an original component, its spherical curvature, pin hole position, and overall dynamic balance have been strictly calibrated to ensure sensitive variable response and smooth motion, avoiding pump noise, flow fluctuations, or early wear caused by insufficient precision of auxiliary components.

It is recommended to check the cleanliness of hydraulic oil (NAS level 9 or below) and oil temperature every 1000 working hours; Monitor the pump body for any abnormal knocking sounds, which may be a sign of wear on the inclined plate and sliding shoes. Troubleshooting: If there is slow or weak movement of the entire machine or abnormal pump noise, after troubleshooting the oil and filter problems, the pump body needs to be disassembled and inspected; Focus on checking whether there are scratches, peeling or dents on the surface of the inclined plate, and measure whether its swing is smooth and whether there is any jamming. Replacement suggestion: After the wear of the inclined plate, it is usually accompanied by the wear of components such as sliding shoes and return plates. It is recommended to replace the relevant wear parts in sets and use original parts to ensure the accuracy of the variable mechanism fit.