4179177 Excavator Hydraulic Pump Pin for Hitachi ZX200

Part number 4179177 is a genuine sales shaft produced by Hitachi Construction Machinery Japan. The universal model of this component covers Hitachi ZX200-3, ZX200-5G, ZX210-3 and other 20-22 ton same platform medium-sized hydraulic excavators. The support chain (chain rail joint) assembly dedicated to the crawler walking mechanism is a key hinge pin shaft that connects the chain links, supporting wheels, or guide wheels. As the core structural connector of the original factory, its diameter, length, heat treatment hardness and chain joint hole are precisely matched

This product is a cylindrical pin shaft precision machined from high carbon alloy steel, usually treated with surface phosphating or blackening, appearing dark gray or black, with high hardness and wear resistance. The packaging specification is 5 pieces per set, which facilitates the simultaneous replacement of multiple points on a single chassis side. Its core design aims to withstand the enormous impact and shear force of the track system during excavator movement. The identification of "Support Chain" clearly indicates its characteristics optimized for harsh chassis conditions. Compared with ordinary pin shafts, it has higher bending strength and surface wear resistance, and is a key component to ensure the stability and service life of the chassis during driving.

Installation specifications: 1 Cleaning inspection: Thoroughly clean the chain link pin holes before installation, and check that the surface of the new pin shaft is free of cracks and rust. 2. Lubrication and alignment: Apply sufficient lubricating grease on the surface of the pin shaft and align it with the chain link hole. 3. Smooth pressing: Use a copper rod or specialized punch to strike smoothly along the axial direction to ensure it is in place, and it is strictly prohibited to cause deformation due to rough construction. 4. Fixation: After installation, be sure to insert and lock the spring pin or locking bolt to prevent axial movement.