Double-hinged heavy-duty rod assembly- 04248-31228

Core Basic Information

Core Features

• Heavy-duty load transfer: The dual-hinge structure evenly distributes hydraulic thrust and impact loads, suitable for heavy-duty shoveling, rock breaking, and other working conditions, protecting the cylinders and pins.

• Precise motion trajectory control: Precisely limits the connecting rod length and hinge point clearance, ensuring consistent trajectory for blade tilting and ripper lifting, improving operational accuracy.

• Anti-torsion and anti-eccentric load support: Acting as a rigid tie rod, it resists torsion and eccentric loads, protecting the cylinders, pins, and frame connections, preventing structural failure.

• Clearance compensation and vibration reduction: The bushing's elastic deformation absorbs assembly gaps and impacts, reducing connecting rod vibration noise and hinge point wear.

• Quick-installation maintenance compatibility: Standard hinge point and bolt hole design allows for compatibility with 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 hole diameter are perfectly matched to the corresponding model, with a positioning accuracy of ≤0.03mm. No gaps, looseness, or abnormal wear are observed after assembly.

• High Strength and Impact Resistance: Constructed with 42CrMo alloy structural steel, heat-treated, with a tensile strength ≥950MPa, yield strength ≥750MPa, and hardness HB280-320. Fatigue life under cyclic load exceeds 10⁴ cycles, suitable for D85 maximum operating load conditions.

• Wear-Resistant and Stable: The bushings at both ends are made of high-strength brass with a PTFE self-lubricating layer, with a friction coefficient ≤0.07, increasing wear life by 3 times; the pin shaft undergoes quenching and nitriding treatment, 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/D355/D155 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.