4434953 Original Excavator Arm Stopper Brake Components for ZX200 ZX200-3 ZX200-5B ZX200-5G ZX230 ZX

This original boom stop brake assembly is specifically designed for the front-end assembly of **Hitachi** medium-duty excavators. Manufactured strictly according to official part number **4434953**, it perfectly fits Hitachi ZX200, ZX200-3, ZX210H-3G, and ZX180 main tracked and wheeled excavators. As a core component controlling the boom's safety limits and extreme buffering, it features standard geometric dimensions, allowing for seamless assembly with the boom and hydraulic circuitry, ensuring the entire machine maintains factory-grade precise alignment and physical coordination under complex heavy-duty conditions.

This assembly uses high-quality high-carbon alloy structural steel as its base material, undergoing precision integral forging and multiple digital heat treatment processes. Its core contact surface and mechanical locking area undergo deep surface hardening, giving it both "hard exterior and tough interior" mechanical properties—high surface hardness, providing excellent resistance to compression, shear, and wear; and a strong base material with high fatigue strength, effectively absorbing and mitigating the enormous alternating impact stress generated during robotic arm positioning. Rigorous lifespan calibration testing ensures the absolute stability of the component's physical structure during long-term operation.

During installation or major overhaul maintenance, high-entropy mud and sand in the installation area must be thoroughly removed. Tighten the bolts strictly according to the original manufacturer's torque standards, and avoid forceful hammering. A standardized inspection log should be established for daily operations. Regularly inspect the clearance and tightness of components, and apply wear-resistant grease to the contact pairs as needed. If abnormal wear or cracking is found in any component, it must be replaced immediately to prevent secondary deformation caused by limit failure and damage to the robotic arm itself. Maintaining the surrounding physical cleanliness ensures the braking core remains in a safe operating condition for a long period.