Core Features
Load Transfer and Force Balance: The dual-hinge structure evenly distributes hydraulic thrust and impact loads to the working device, adapting to heavy-duty loading, rock breaking, and other working conditions.
Synchronized Movement Trajectory: Precisely limiting the connecting rod length and hinge point clearance ensures consistent trajectory for blade tilting and ripper lifting, improving operational accuracy.
Anti-torsional and Anti-eccentric Load Support: Acting as a rigid tie rod, it resists torsion and eccentric loads during operation, protecting the cylinder, pin, and frame connection points to prevent structural failure.
Clearance Compensation and Vibration Reduction: The elastic deformation of the bushing absorbs assembly gaps and impacts, reducing connecting rod vibration noise and hinge point wear.
Quick Loading/Unloading and Maintenance: Standard hinge point and bolt hole design accommodates common tools, shortening maintenance downtime.
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 the maximum operating load conditions of D85.
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 and humid/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 D70/D65/D85 bulldozers in heavy-duty continuous operations such as earthmoving, mine stripping, and land leveling. It is particularly compatible with the blade tilting mechanism and the soil loosener lifting system. To enhance the reliability and operational precision of the linkage system, it is recommended to replace the bushing, pin, and dust ring simultaneously.
