Core Features
Heavy-duty load transfer: The double-hinge structure evenly bears working loads of ≥150kN, suitable for ultra-heavy-duty working conditions such as rock breaking and mining stripping, protecting the cylinder piston rod and pin.
Precise motion trajectory control: Fixed rod length and hinge point spacing ensure consistent trajectory of the ripper's lifting/swinging and blade tilting, improving operational accuracy.
Anti-torsion and anti-eccentric load support: As a rigid connecting rod, it resists torsion and eccentric loads, preventing deformation at the hinge point and preventing structural failure.
Clearance compensation and vibration reduction: Self-lubricating bushings absorb assembly gaps and impacts, reducing vibration noise and hinge point wear.
Quick installation and maintenance adaptation: Standard hinge point and bolt hole design, compatible with original factory 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 rod length, hinge point spacing, and pin hole diameter perfectly match the hinge points of the corresponding model, with a positioning accuracy of ≤0.03mm. After assembly, it fits tightly with the pin/bushing without any gaps, looseness, or abnormal wear.
Extra-Heavy-Duty Strength Guarantee: Constructed with 42CrMo alloy structural steel, heat-treated, with a tensile strength ≥950MPa, yield strength ≥750MPa, hardness HB280-320, torsional stiffness ≥1500N・m/°, and fatigue life exceeding 10⁴ cycles under cyclic loads, suitable for D375 maximum operating load ≥180kN.
Wear-Resistant and Stable: The bushings at both ends are made of high-strength brass + PTFE self-lubricating layer, with a friction coefficient ≤0.07, increasing wear life by 3 times; the pin is quenched and nitrided, with a surface hardness of HRC54-58, suitable for long-term heavy-duty operation.
Anti-loosening and corrosion-resistant reinforcement: The pin is equipped with double nuts + anti-loosening washers + cotter pins; the bushing has a dustproof sealing ring; the connecting rod surface is shot-blasted + epoxy primer + topcoat treatment, with salt spray resistance ≥120 hours, suitable for dusty, humid/acid and alkaline mining conditions.
Lightweight structural optimization: Finite element optimization of the rod cross-section reduces weight by 10%, lowering hydraulic energy consumption and structural inertial impact.
Applicable Scene
This component is designed for Komatsu D31/D155/D375 bulldozers in heavy-duty continuous operations such as mine stripping, large-scale infrastructure projects, and rock loosening. It is particularly compatible with the excavator's lifting system and blade tilting mechanism. To enhance the reliability and operational precision of the linkage system, it is recommended to replace the bushing, pin shaft, and dust seal simultaneously.
