Original Excavator Grouser Shoe 4345174 for Hitachi ZX890-5A

This heavy-duty high-strength triple toothed track shoe (Original Grouser Shoe) has Hitachi original core part number 4345174. This high-end chassis walking component serves as an absolute physical proof for excavators to directly resist surface friction and impact, specially designed for deep matching of Hitachi's large heavy-duty mining hydraulic excavators, and accurately applicable to 85 to 90 ton giant star models such as Hitachi ZX870-5G and ZX890-5A. The product is based on first principles and is made of high-quality and high hardenability alloy steel through integral hot forging and precision heat treatment processes. It has extremely high surface hardness and core toughness, perfectly and seamlessly resisting the ultra-high pressure instantaneous alternating load under continuous mining stripping and hard rock crushing conditions. The product packaging/standard physical dimensions are approximately 610mm × 230mm × 140mm (with a width typically ranging from 610mm to 900mm), and the overall net weight of a single piece is approximately 38.5kg.

"Extreme cleaning and factory matching (core pit avoidance): Before installation, a wire brush must be used to thoroughly remove rust, oil, and sand from the mating surfaces and threaded holes of the track links. It is necessary to use original, brand new high-strength track bolts and nuts as a mandatory accessory. It is strictly prohibited to reuse old bolts that have undergone plastic tensile deformation to prevent sudden fracture in the later stage.

Multi stage high torque tightening: When installing bolts, an appropriate amount of molybdenum disulfide grease must be applied to the threads and washer surfaces. It is necessary to use a large torque multiplier or a professional hydraulic torque wrench, and strictly follow the original factory technical specifications for phased and cross tightening. Usually, it is necessary to first preload to the rated torque, and then forcibly add a fixed rotation angle (such as 1/3 turn) to achieve the absolute preload stress required by physics."