Ultimate wear resistance & articulation precision. The genuine XCMG 380906867 Upper Hinge Pin (QPQ) is a critical articulation component specifically designed for XCMG GR215 motor graders. OEM number 380906867 identifies the GR215Ⅹ.14-4 upper hinge pin, manufactured using advanced QPQ (Quench-Polish-Quench) salt bath nitriding technology. This process creates a super-hard, anti-galling surface with exceptional corrosion resistance, ensuring smooth articulation and extended service life under extreme loading.
Engineered for XCMG GR215, GR2003, and compatible GR series graders, the 380906867 upper hinge pin connects the front frame to the rear frame via the articulation joint, absorbing torsional stresses and pivot loads. The QPQ treatment provides a surface hardness of 650–750 HV with a compound layer that reduces friction and eliminates micro-welding. This results in smoother steering, reduced bushing wear, and lower maintenance costs.
Ideal for heavy grading, mining, and rough terrain applications, this hinge pin retains its dimensional stability even after thousands of articulation cycles. The QPQ process also offers outstanding salt spray resistance (over 200 hours without rust), making it perfect for humid or chemically aggressive environments. Precision ground diameters ensure a perfect fit with the OEM bronze bushings.
Upgrade your grader’s articulation reliability with the XCMG 380906867 Upper Hinge Pin (QPQ) – a component that eliminates sloppy steering, reduces downtime, and extends pivot joint life by up to 300%. Worldwide contractors trust XCMG QPQ-treated pins for their unmatched durability and precision.
| Parameter | Value / Detail |
|---|---|
| OEM Number | 380906867 / GR215Ⅹ.14-4 |
| Part Name | Upper Hinge Pin (Articulation Pin) with QPQ Treatment |
| Brand | XCMG Original Equipment |
| Material | High-strength alloy steel (42CrMo / AISI 4140 equivalent) |
| Surface Treatment | QPQ (Quench-Polish-Quench) salt bath nitriding |
| Surface Hardness (HV) | 650 – 750 HV (compound layer depth 15–25 µm) |
| Core Hardness (HRC) | 32 – 38 HRC |
| Pin Diameter (mm) | 70.00 mm ±0.013 mm (precision ground) |
| Overall Length (mm) | 285 mm ±0.2 mm |
| Weight per Unit | 8.7 kg ± 1% |
| Corrosion Resistance (Salt Spray) | ≥ 200 hours (ASTM B117) |
| Applicable Models | XCMG GR215, GR215Ⅹ, GR2003, GR200, GR300 (upper articulation) |
| Packaging | Oil-coated, shrink-wrapped, heavy-duty carton |
| Certification | ISO 9001:2015, QPQ process certified |
The XCMG 380906867 upper hinge pin utilizes the QPQ (Quench-Polish-Quench) process – a specialized salt bath nitriding followed by oxidation and polishing. This creates a multi-layer surface: a hard compound zone (ε-Fe2-3N), a diffusion zone with precipitated nitrides, and a black oxide top layer. The result is a pin with exceptional wear resistance, anti-galling properties, and corrosion protection far superior to conventional chrome plating or case hardening.
Unlike standard nitride treatments, QPQ eliminates the risk of white layer spalling and provides a low coefficient of friction (μ ≈ 0.12 against lubricated bronze). This reduces heat generation during articulation, prolonging both pin and bushing life. Independent lab tests show QPQ-treated pins last 4x longer than through-hardened pins in high-load oscillating applications.
Each 380906867 hinge pin is turned, hardened, and then centerless ground to a tolerance of ±0.013 mm (IT5 grade). The surface roughness (Ra) is ≤0.4 µm, ensuring a perfect mating surface for the OEM bronze bushings. This precision eliminates play in the articulation joint, resulting in predictable steering response and reduced stress on adjacent components.
The alloy steel core (42CrMo) provides a tensile strength of 1080 MPa and an endurance limit of 550 MPa under rotating bending. Finite element analysis confirms the pin can withstand dynamic radial loads up to 180 kN without permanent deflection. This safety margin ensures reliability even when graders operate on severely uneven terrain.
The upper hinge pin 380906867 is a direct replacement for the articulation joint of XCMG GR215, GR215Ⅹ, GR2003, and many GR200/GR300 graders. It connects the front frame to the rear frame, allowing the machine to articulate for tight turning radii while maintaining structural rigidity. Worn pins cause excessive play, uneven tire wear, and poor blade control. Replacing with this genuine QPQ pin restores factory steering precision.
This pin is also suitable for heavy-duty applications such as mining, landfill compaction, and snow removal where articulation cycles are high and corrosion is a concern. The QPQ treatment provides excellent resistance to deicing salts and acidic mine water.
Replacing the upper hinge pin requires supporting the front frame, removing the retaining bolt, and using a hydraulic puller. Thoroughly clean the pin bore and inspect bushings before installation. Apply XCMG-recommended lithium grease to the pin surface. Torque the retaining bolt to 580 Nm. After 50 hours of operation, re-torque and check for any axial movement.
Regularly lubricate the articulation joint every 250 hours. If the pin shows signs of wear (diameter reduction >0.1 mm), replace it immediately to avoid damaging the frame lugs. Always use genuine XCMG pins to guarantee correct metallurgy and QPQ depth. Store spare pins in a dry, oiled condition.
Every XCMG 380906867 upper hinge pin is produced in an ISO 9001:2015 facility with full material traceability. QPQ processing parameters are monitored real-time to ensure consistent case depth and hardness. A random sample from each batch undergoes metallographic examination, microhardness profiling, and salt spray testing. XCMG offers a 12-month warranty against manufacturing defects.
Counterfeit pins often use simple through-hardening or shallow nitriding, leading to rapid wear and fretting corrosion. Protect your grader’s articulation joint by sourcing only verified 380906867 components from authorized channels. The genuine part ensures the same QPQ performance as the original factory pin.
The XCMG 380906867 hinge pin is stocked in regional warehouses across Asia, Europe, the Middle East, Africa, and the Americas. Each pin is individually oil-coated, wrapped in VCI film, and packed in a heavy-duty carton. Bulk orders (5+ pieces) are available with reduced shipping costs. Standard lead time is 3–7 business days for most regions.
For large fleet rebuilds, XCMG offers kit packages including pins, bushings, and seals. Always reference OEM number 380906867 when ordering. Emergency air freight is available for critical downtime situations.
Controlled articulation cycle tests (1 million cycles, ±30° rotation, 120 kN radial load) show that the genuine XCMG 380906867 QPQ pin exhibits only 0.02 mm wear, while a standard 40 HRC pin shows 0.18 mm wear and a case-hardened (55 HRC) pin shows 0.09 mm wear. The QPQ pin’s compound layer prevents adhesive wear, a common failure mode in oscillating joints.
Corrosion testing in 5% NaCl solution shows the QQP pin remains rust-free after 200 hours, compared to severe pitting on zinc-plated pins after 96 hours. The total cost of ownership using the genuine pin is 50% lower over a 10,000-hour grader life due to reduced bushing replacements and downtime.
Each shipment of XCMG 380906867 includes a material certificate (EN 10204 3.1) and QPQ process validation report. Digital installation manuals, torque specifications, and 3D step files are available via the XCMG partner portal. For complex articulation rebuilds, XCMG field support can be arranged through the inquiry button.
Maintain your grader’s steering precision and structural integrity with genuine XCMG 380906867 upper hinge pins – engineered for the toughest grading conditions worldwide.
XCMG genuine 380906867 Upper Hinge Pin (QPQ) – OEM quality, advanced surface engineering. For technical datasheets or urgent orders, use the Inquiry Now or Send Email button.
