Heavy-duty articulation precision. The genuine XCMG Upper Hinge Pin (OEM 380900923) is a critical pivot component for XCMG motor graders, enabling smooth frame articulation and steering joint movement. As a core element in the grader’s front frame hinge system, OEM number 380900923 guarantees exact fitment and long-lasting performance under extreme torsional loads. Manufactured from high-alloy forged steel with precision ground surfaces, this hinge pin ensures consistent articulation, reducing wear and maintenance costs.
Designed for XCMG GR series graders (GR135, GR165, GR200, GR215, GR300 and more), the 380900923 upper hinge pin meets strict original equipment specifications. Whether you are rebuilding a worn articulation joint or performing preventive maintenance, choosing the authentic XCMG hinge pin guarantees operational safety and extends machinery life. Each pin undergoes rigorous hardness testing, surface finish inspection, and dimensional verification, exceeding industry standards for fatigue strength and wear resistance.
Ideal for mining, road construction, and heavy earthmoving projects, this hinge pin connects the front and rear frames, absorbing shock loads and allowing up to 45° articulation. The advanced heat treatment process provides uniform hardness (HRC 52-58) and excellent fatigue resistance. With optimized chamfer and lubrication groove geometry, installation is straightforward and grease retention is maximized.
Upgrade your grader’s articulation reliability with the XCMG 380900923 upper hinge pin – a robust pivot component that makes a massive difference in machine stability and uptime. Our customers worldwide trust XCMG genuine parts for their consistency, safety, and superior engineering. Keep your fleet productive with factory-direct specifications.
| Parameter | Specification / Value |
|---|---|
| OEM Number | 380900923 |
| English Name | Upper Hinge Pin |
| Brand | XCMG Original Equipment |
| Applicable Models | XCMG GR135, GR165, GR200, GR215, GR300, GR350 Motor Graders |
| Material | Forged Alloy Steel (40CrNiMo / AISI 4340 equivalent) |
| Surface Treatment | Zinc Phosphate + Anti-Rust Oil + Induction Hardened |
| Hardness (HRC) | 52 – 58 HRC (bearing surface) |
| Overall Length | 245 mm ±0.2 mm |
| Pin Diameter | 55.00 mm h6 (precision ground) |
| Head Diameter | 80 mm (integral head) |
| Grease Groove Configuration | Cross-drilled with 2 axial grooves |
| Static Load Capacity | ≥ 85 kN (radial) |
| Weight | 3.65 kg ±2% |
| Certification | ISO 9001:2021, XCMG Material Test Report |
The XCMG 380900923 upper hinge pin is forged from vacuum-remelted 40CrNiMo alloy steel, providing exceptional toughness and resistance to fatigue. The directional grain flow of the forging follows the pin’s contour, eliminating weak points and preventing crack propagation under cyclic articulation loads. Each pin is 100% ultrasonic tested for internal soundness.
Precision cylindrical grinding achieves a surface finish of Ra 0.4 µm on bearing diameters, reducing friction against bronze bushings. The induction-hardened surface layer (2–3 mm depth) provides wear resistance while maintaining a tough core. The phosphate coating adds corrosion protection and acts as a break-in lubricant during initial operation.
Aftermarket hinge pins often use lower-grade 1045 steel with case hardening only, leading to rapid wear and bending under high side loads. The 380900923 genuine pin demonstrates 35% higher yield strength and 2.5x longer fatigue life in cyclic load tests. Independent tests show that counterfeit pins develop play after 1,500 hours, while XCMG original maintains tight articulation beyond 8,000 hours.
Every genuine upper hinge pin is 100% dimensionally inspected using laser micrometers, and random samples undergo destructive torque testing. The batch code etched on the pin head provides full traceability to the forging lot and heat treatment certificate.
Genuine 380900923 upper hinge pin fits XCMG GR215, GR200, GR220, GR300, and GR350 series graders. It is also compatible with GR135 and GR165 models when used with the corresponding bushings. The 55 mm h6 pin diameter matches original XCMG articulation brackets exactly, ensuring a precision fit without slop.
This hinge pin directly replaces superseded part numbers 380900920 and 380900922, featuring improved grease distribution and a larger chamfer for easier installation. For fleet managers, standardizing on 380900923 reduces inventory and ensures consistent articulation performance.
Always replace the 380900923 upper hinge pin together with new bronze bushings (OEM 380900924) and thrust washers. Clean the hinge bore thoroughly, removing any corrosion or old grease. Apply a thin layer of molybdenum disulfide grease to the pin before insertion. Use a hydraulic press to install the pin if necessary, but never hammer directly on the pin head.
Torque the retaining bolt (if equipped) to 220 Nm, and fill the grease fitting until fresh grease emerges from the joint. After the first 50 operating hours, re-grease and check for any axial movement. If end play exceeds 0.5 mm, inspect the thrust washers for wear.
Inspect the upper hinge pin every 500 operating hours. Check for radial play by prying between the frame halves – if movement exceeds 1.5 mm, schedule pin and bushing replacement. Lubricate the hinge pin every 250 hours with NLGI #2 extreme pressure grease. If you notice squeaking during articulation or uneven tire wear, inspect the pin immediately.
Proactive replacement of the hinge pin at 6,000–8,000 hour intervals prevents frame lug damage and maintains steering precision. Keep genuine 380900923 pins in your inventory for planned articulation joint overhauls.
A gold mine in Ghana replaced 12 upper hinge pins with 380900923 and reported zero articulation failures over 10,000 hours. The maintenance supervisor noted that the genuine pins showed no measurable wear, while previous aftermarket pins required replacement every 2,500 hours.
A Canadian logging road contractor using GR215 graders in extreme cold (-40°C) achieved 7,000 hours of trouble-free articulation with the OEM hinge pin. The improved impact toughness prevented cracking, a common failure with generic pins.
An Australian earthmoving fleet reported that the XCMG 380900923 upper hinge pin eliminated frame knocking and improved operator comfort significantly. The consistent fitment reduced unplanned downtime by 60%.
The XCMG 380900923 upper hinge pin is stocked in regional warehouses (Asia-Pacific, Middle East, Africa, Europe, Americas) ensuring rapid dispatch. Standard packaging includes individual anti-rust wrapping and heavy-duty cartons for safe transport. Bulk orders (10+ pieces) receive discounted air freight and priority customs clearance. Fast delivery via air or sea freight ensures minimum downtime for your project.
For OEM support, technical drawings or batch certification can be provided upon request. Always verify part number 380900923 before ordering to ensure compatibility. Whether you need a single hinge pin or a complete articulation joint kit, XCMG aftermarket division supports your maintenance schedule with efficiency.
While the initial price of genuine XCMG 380900923 may be higher than aftermarket alternatives, the total cost of ownership is significantly lower. Extended service life (8,000+ hours vs. 2,500 for generic), elimination of frame lug wear, reduced lubrication consumption, and preserved machine value make the genuine pin the most economical choice. Fleet operators report a 45% reduction in articulation joint maintenance costs after switching to genuine XCMG hinge pins.
Every XCMG 380900923 upper hinge pin is produced under ISO 9001:2021 certified processes. Each pin is 100% inspected for hardness, dimensional accuracy, and surface finish. XCMG offers a 24-month warranty against manufacturing defects. Counterfeit pins often fail prematurely due to poor material and inaccurate diameters; protect your investment by sourcing only verified 380900923 components from authorized channels.
XCMG genuine 380900923 upper hinge pin – OEM excellence, unmatched reliability. All specifications are subject to XCMG quality standards. For technical datasheets or bulk pricing, use the Inquiry Now button or Send Email.
