Fork Plate-4211-21266

Core Features

Articulated Load Transfer: The double-fork lug structure evenly distributes the hydraulic cylinder thrust and operational impact loads, transferring force to the frame/blade/ripper, suitable for heavy-duty loading, rock breaking, and other working conditions.

Precise Pin Positioning: The pin holes in the fork lugs precisely mate with the pins and bushings, limiting the articulation clearance and preventing radial and axial movement of the pins, ensuring accurate movement trajectory.

Torsion and Deformation Resistance Support: As a rigid support for the articulated structure, it resists torsion and eccentric loads during operation, protecting the cylinder piston rod, pin connection to the frame, and preventing structural failure.

Assembly Reference Positioning: Provides an installation reference for the pins, bushings, and dust seals, ensuring coaxiality and reducing wear and noise at the articulation points.

Easy Maintenance and Compatibility: Standard pin and bolt hole design, compatible with original factory pins and fasteners, requiring no special tools for installation and removal, shortening maintenance time.

Product Superiority

Original Factory Precision Fit: Manufactured according to Komatsu's original drawings, the fork lug spacing, pin hole diameter, and plate thickness perfectly match the hinge points of the corresponding machine model, with a positioning accuracy of ≤0.03mm. After assembly, it fits tightly with the pin/bushing, eliminating loosening or abnormal wear caused by gaps.

High Strength and Impact Resistance: Made of Q345B alloy structural steel, heat-treated, with tensile strength ≥800MPa, yield strength ≥500MPa, hardness HB220-260, and torsional stiffness ≥1200N・m/°, suitable for ultra-heavy-duty bulldozers with a maximum operating load ≥120kN.

Wear and Fatigue Resistance: The inner hole of the fork lug is quenched and nitrided, with a surface hardness of HV600-800, increasing wear life by 3 times. Fatigue life under cyclic load reaches over 10⁴ cycles, suitable for long-term heavy-duty operation.

Corrosion and Working Condition Resistance: Surface shot blasting + epoxy primer + topcoat treatment, salt spray resistance ≥96 hours, suitable for dusty, humid/acidic/alkaline environments in mines and infrastructure, preventing rust and structural strength degradation.

Structural Optimization and Weight Reduction: Finite element optimization of the double-fork lug cross-section reduces weight by 15% while maintaining strength, lowering hydraulic energy consumption and structural inertial impact.

Applicable Scene

This component is designed for Komatsu D31/D355/D375 bulldozers in heavy-duty continuous operations such as mine stripping, large-scale infrastructure projects, rock loosening, and site leveling. It is particularly compatible with the blade tilting mechanism and soil loosening drive system. For optimal performance, it is recommended to replace the pin shaft, bushing, and dust ring simultaneously to enhance the reliability of the articulated joints and improve operational precision.