XCMG GR2003 Grader Parts – Bushing (II) 381600433 Heavy-Duty Wear Component

The XCMG Bushing (II) with OEM number 381600433 is a precision-engineered wear component designed for motor grader articulation joints, circle drive supports, and blade linkage systems. As a genuine XCMG part, this bushing reduces friction between moving steel components, ensuring smooth operation and extended equipment life in GR series graders (GR2003, GR215, GR300, GR350).

Manufactured from high-grade phosphor bronze alloy, the Bushing (II) 381600433 offers exceptional wear resistance, high compressive strength, and excellent anti-galling properties. The material is slightly softer than the mating hardened steel pin, ensuring that wear occurs primarily on the easily replaceable bushing rather than on the more expensive pin or housing components.

Each 381600433 bushing features precision-machined oil grooves on the inner diameter, designed to retain grease and distribute lubricant evenly across the entire contact surface. This establishes a hydrodynamic film that separates metal surfaces during operation, drastically reducing wear rates and preventing galling even under high-load oscillation.

The outer diameter of 381600433 is ground to strict interference-fit tolerances (ISO h6), ensuring the bushing remains firmly seated in its housing without spinning. This prevents the bushing from rotating, which could wear out the housing bore and compromise joint stability. The inner diameter is finished to ISO H7 tolerance, providing a controlled clearance of 0.05–0.15 mm with the mating pin.

Aftermarket bushings often use lower-grade brass or recycled bronze alloys that wear rapidly under high-frequency oscillation. The genuine XCMG 381600433 bushing has been field-tested on GR2003 graders in mining and highway construction, demonstrating service life exceeding 7,000 hours in normal conditions—significantly outperforming generic alternatives.

Worn articulation bushings are the single most common cause of blade wander on graders with more than 8,000 hours. The 381600433 bushing eliminates this issue by maintaining tight concentricity within the joint, ensuring that force is transmitted efficiently without introducing play or vibration that could degrade grading accuracy.

Compatible models include GR100, GR135, GR165, GR180, GR2003, GR215, GR215A/B, GR300, GR350, GR3505, and C-series graders. The Bushing (II) 381600433 also replaces older OEM numbers such as 381600303, 381600089, and 860100407. For fleet managers, standardizing on 381600433 reduces spare parts inventory complexity.

Installation of the 381600433 bushing requires careful attention: the housing bore must be thoroughly cleaned and deburred. Use a hydraulic press or a bushing driver tool that contacts only the outer edge. Never strike the bushing directly with a hammer. After pressing, ensure the bushing is flush or slightly recessed (max 0.5 mm) relative to the housing face.

For maximum service life, grease the 381600433 bushing every 250 operating hours using NLGI #2 lithium-based grease with EP additives. In dusty or wet environments, reduce the interval to 100 hours. Proper lubrication prevents metal-to-metal contact, reduces friction, and dissipates heat, dramatically extending bushing and pin life.

Inspection signs of worn bushings include excessive mechanical play or “slop” in pivot points, audible knocking or clunking sounds during articulation, and visible movement between pin and housing. If the 381600433 bushing shows signs of scoring, cracking, or OD reduction, replace it immediately to avoid damaging the mating pin.

Extreme temperature performance: the phosphor bronze alloy used for 381600433 maintains its mechanical properties from -40°C to +150°C. The material’s thermal expansion coefficient is well-matched to steel housings, preventing seizure or excessive clearance changes across the entire operating temperature range, from arctic pipeline projects to desert mining.

Quality assurance: every batch of 381600433 bushings undergoes 100% dimensional inspection, eddy current crack detection, and sample destructive load testing according to ISO 9001:2024 standards. Each bushing is laser-marked with the OEM number and batch code for full traceability, ensuring you receive a genuine XCMG component.

For storage, keep 381600433 bushings in a dry, climate-controlled area. The original packaging includes a volatile corrosion inhibitor to prevent oxidation. If stored for extended periods, apply a thin film of light oil before installation. Do not use abrasive cleaning methods that could damage the precision-machined surface.

In summary, the XCMG Bushing (II) 381600433 is an essential wear component for maintaining precise alignment, reducing friction, and extending the life of pivot pins and housings on your motor grader. Choosing genuine XCMG ensures consistent material quality, exact fit tolerance, and field-proven durability—resulting in lower operating costs and higher machine availability.