Heavy-duty articulation precision for grader suspension. The genuine XCMG Lower Pivot Pin (OEM 380905146) is a precision-forged component engineered for XCMG motor graders, providing reliable load transfer in lower articulation joints, suspension linkages, and axle mounting systems. As a critical pivot element in the grader’s chassis, OEM number 380905146 guarantees exact fitment and long-lasting performance under extreme shock loads, torsional stress, and heavy articulation. Manufactured from high-alloy forged steel with precision-ground bearing surfaces and anti-corrosion coating, this pivot pin ensures smooth rotation and consistent alignment, reducing wear and maintenance costs.
Designed for XCMG GR series graders (GR135, GR165, GR200, GR215, GR300, GR350 and more), the 380905146 lower pivot pin meets strict original equipment specifications. Whether you are rebuilding a worn articulation joint, overhauling a suspension system, or performing routine chassis maintenance, choosing the authentic XCMG pivot pin guarantees operational safety and extends machinery life. Each pin undergoes rigorous hardness testing, dimensional inspection, and surface finish verification, exceeding industry standards for fatigue strength and wear resistance.
Ideal for mining, road construction, and heavy earthmoving projects, this lower pivot pin connects the axle to the frame, absorbing radial and axial loads while enabling controlled articulation. The advanced heat treatment process provides uniform hardness (HRC 50-56) and excellent core toughness. With optimized grease grooves and chamfered ends, installation is straightforward and lubrication retention is maximized.
Upgrade your grader’s suspension reliability with the XCMG 380905146 lower pivot pin – a robust pivot component that ensures frame stability and operator comfort. 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 | 380905146 |
| English Name | Lower Pivot Pin (Suspension / Articulation) |
| 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) | 50 – 56 HRC (bearing surface) |
| Overall Length | 210 mm ±0.2 mm |
| Pin Diameter | 45.00 mm h6 (precision ground) |
| Head Diameter | 68 mm (integral head with chamfer) |
| Grease Groove Configuration | Two annular grooves + cross-drilled lubrication holes |
| Static Load Capacity | ≥ 95 kN (radial) |
| Weight per Unit | 2.85 kg ±3% |
| Packaging | Individual anti-corrosion bag, reinforced export carton (10 pcs/box) |
| Certification | ISO 9001:2021, XCMG Material Test Report |
The XCMG 380905146 lower pivot 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 (2–2.5 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 lower pivot pins often use lower-grade 1045 steel with only case hardening, leading to rapid wear, bending, or seizure under high side loads. The 380905146 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 10,000 hours.
Every genuine 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 380905146 lower pivot pin fits XCMG GR215, GR200, GR220, GR300, and GR350 series graders. It is also compatible with GR135 and GR165 lower suspension links and axle mounting brackets. The 45 mm h6 pin diameter matches original XCMG bores exactly, ensuring a precision fit without slop.
This pivot pin directly replaces superseded part numbers 380905140 and 380905143, featuring improved grease distribution and a larger chamfer for easier installation. For fleet managers, standardizing on 380905146 reduces inventory and ensures consistent pivot performance across your grader fleet.
Always replace the 380905146 lower pivot pin together with new bushings and thrust washers. Clean the housing 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 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 0.4 mm, inspect the thrust washers for wear.
Inspect the lower pivot pin every 500 operating hours. Check for radial play by prying between components – if movement exceeds 1.2 mm, schedule pin and bushing replacement. Lubricate the pin every 250 hours with NLGI #2 extreme pressure grease. If you notice squeaking during articulation or uneven frame movement, inspect the pin immediately.
Proactive replacement of the pivot pin at 6,000–8,000 hour intervals prevents housing damage and maintains steering precision. Keep genuine 380905146 pins in your inventory for planned suspension overhauls.
A copper mine in Zambia replaced 14 lower pivot pins with 380905146 and reported zero articulation failures over 9,000 hours. The maintenance supervisor noted that the genuine pins showed no measurable wear, while previous aftermarket pins required replacement every 2,000 hours.
A Norwegian road construction contractor using GR215 graders in extreme cold (-35°C) achieved 6,500 hours of trouble-free pivot operation with the OEM pin. The improved impact toughness prevented cracking, a common failure with generic pins.
An Australian earthmoving fleet reported that the XCMG 380905146 lower pivot pin eliminated suspension knocking and improved operator comfort significantly. The consistent fitment reduced unplanned downtime by 55%.
The XCMG 380905146 lower pivot 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 (20+ 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 380905146 before ordering to ensure compatibility. Whether you need a single pin or a complete suspension kit, XCMG aftermarket division supports your maintenance schedule with efficiency.
While the initial price of genuine XCMG 380905146 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 housing wear, reduced lubrication consumption, and preserved machine value make the genuine pin the most economical choice. Fleet operators report a 50% reduction in suspension joint maintenance costs after switching to genuine XCMG pivot pins.
Every XCMG 380905146 lower pivot 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 380905146 components from authorized channels.
XCMG genuine 380905146 lower pivot 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.
