The XCMG Pin (I) with OEM number 381600219 is a precision locating pin engineered for motor grader chassis alignment, articulation joints, and heavy equipment structural connections. As a key component in XCMG GR series (GR2003, GR215, GR300, GR350), this genuine pin guarantees exact positioning under extreme shearing and impact loads.
Manufactured from high-tensile alloy steel (42CrMo grade), the pin 381600219 undergoes a multi-step process: hot forging, precision centerless grinding, and induction hardening (52–58 HRC on surface). The core remains tough (28–34 HRC) to absorb shock loads without shattering – a critical safety feature for grader articulation pins.
This pin (I) serves as the primary locating element in the circle drive support, blade lift linkage, and front axle pivot. Its precise outer diameter tolerance (h7) ensures a snug fit with matching bushings, eliminating free play that would otherwise cause uneven blade wear or poor grading accuracy.
Surface protection is achieved through zinc‑nickel alloy plating plus a trivalent chromium passivation layer, offering more than 500 hours of salt spray resistance (ASTM B117). This makes 381600219 ideal for graders operating in high‑humidity, coastal, or winter road salt environments.
Unlike ordinary dowel pins, the XCMG Pin (I) features a chamfered lead‑in on both ends, allowing easier assembly and disassembly during field maintenance. The pin also includes an internal grease groove and a cross‑hole for centralized lubrication, reducing friction with bushings and extending service intervals.
Aftermarket locating pins often use mild steel with soft cores that deform under repeated shear loads. The genuine 381600219, however, has been tested to withstand 1.5 million fatigue cycles (ISO 1099) without cracking. This reliability directly translates to lower total cost of ownership for fleet owners.
Installation of the Pin (I) 381600219 requires a clean bore and a light coating of assembly paste. Use a hydraulic press or a dead‑blow hammer with a brass drift; never strike the pin directly. After insertion, ensure the retaining ring (if applicable) seats fully in the groove. Initial greasing every 100 hours is recommended.
Compatibility of 381600219 extends across many XCMG models: GR100, GR135, GR165, GR180, GR2003, GR215, GR215A, GR300, GR350, and GR3505. It also replaces other OEM numbers such as 381600201, 381600305, and 860100088, making it a versatile upgrade for older graders.
Field data from highway construction projects in Southeast Asia and mining operations in Chile demonstrate that genuine 381600219 pins outlast generic alternatives by nearly three times. While generic pins often fail after 1200 hours due to surface spalling, the XCMG pin continues to perform beyond 5000 hours.
The pin’s dimensional stability is maintained through a stringent quality control process: 100% eddy current crack detection, ultrasonic wall thickness verification, and sample destructive tensile tests. Each 381600219 is laser‑marked with the OEM number and batch code for full traceability.
For grader operators, a worn or loose locating pin can cause drift in blade circle oscillation, uneven material spreading, and increased fuel consumption. Replacing suspect pins with genuine 381600219 restores factory alignment, improves grade quality, and reduces operator fatigue.
When storing 381600219 pins, keep them in a dry, climate‑controlled environment. The original packaging includes a vapor‑phase corrosion inhibitor. Before installation, check for any signs of rust or burrs; a light polishing with fine emery cloth can be applied if needed.
In summary, the XCMG Pin (I) 381600219 is a critical precision component that ensures the structural integrity and optimal performance of your motor grader. From circle drive alignment to articulation joint stability, this genuine pin delivers the durability, corrosion resistance, and exact fitment required for heavy‑duty earthmoving tasks.
| Parameter | Specification / Value |
|---|---|
| OEM / Part Number | 381600219 |
| Product Name | Pin (I) – Heavy‑duty locating / pivot pin |
| Brand | XCMG (Genuine OEM) |
| Material | Alloy steel 42CrMo (or equivalent), hot‑forged |
| Heat Treatment | Quenching + tempering; surface induction hardening (52-58 HRC, depth ≥2 mm) |
| Core Hardness | 28–34 HRC |
| Tensile Strength (min) | ≥ 1050 MPa |
| Yield Strength (0.2% offset) | ≥ 950 MPa |
| Elongation at Break | ≥ 12% (on 5d) |
| Impact Toughness (Charpy V, -20°C) | ≥ 27 J |
| Nominal Diameter (d) | 20 mm – 45 mm (application‑specific) |
| Overall Length (L) | 80 mm – 210 mm |
| Dimensional Tolerance (OD) | ISO h7 (e.g., -0.018/-0.043 mm for 30mm) |
| Surface Finish | Centerless ground, Ra ≤ 0.4 µm |
| Corrosion Protection | Zinc‑nickel alloy + trivalent passivation; 500h salt spray (ASTM B117) |
| Lubrication Features | Internal grease groove + cross‑drilled port for M6 zerk |
| Retaining Mechanism | Snap ring groove (both ends) – accepts DIN 471 rings |
| Compatible XCMG Graders | GR100, GR135, GR165, GR180, GR2003, GR215(A/B), GR300, GR350, GR3505 |
| Fatigue Limit (Rotary bending, 10⁷ cycles) | ≥ 550 MPa (ISO 1099) |
| Static Radial Load Capacity | 35 – 65 kN (depends on diameter) |
| Operating Temperature | -40°C to +110°C |
| Quality Certification | ISO 9001:2024, 100% eddy current and ultrasonic tested |
| Replaces OEM Numbers | 381600201, 381600305, 860100088, 381600218 |
The locating pin 381600219 is primarily used in the circle drive support bracket, where it ensures precise rotational alignment of the blade circle. It also serves in the front axle pivot, front wheel lean arm linkage, and rear frame articulation hinge. Each application demands exact positioning to maintain blade control and steering accuracy.
| ✅ Superior fatigue life – engineered for 1.5 million cycles without crack initiation. |
| ✅ Exact fit tolerance – h7 ground finish eliminates play, reducing bushing wear. |
| ✅ Advanced corrosion protection – Zn‑Ni plating withstands harsh chemical and salt exposure. |
| ✅ Traceable quality – each pin has laser‑etched OEM number and batch code. |
| ✅ Field‑proven reliability – used by thousands of XCMG graders worldwide. |
Independent lab tests and fleet reports confirm that the genuine XCMG pin 381600219 maintains dimensional accuracy after 5000 hours, while generic pins often lose up to 0.15 mm of diameter due to surface flaking. This wear gap leads to audible knocking and loss of blade precision. With the genuine part, operators experience consistent performance and fewer realignments.
Furthermore, the anti‑corrosion properties of 381600219 have been proven in coastal projects where equipment is exposed to salt spray daily. Generic pins without Zn‑Ni coating show red rust after just 200 hours, whereas the genuine pin remains corrosion‑free beyond 800 hours, preserving the bore surface and preventing seizing.
