The genuine XCMG 380902193 Pin I is a precision‑machined, high‑strength pivot pin manufactured for XCMG GR series motor graders. This OEM pin is used in critical mechanical joints including blade lift linkage pivot points, articulation hinge connections, and control lever mounting brackets, where it provides robust axial and radial load transfer under continuous oscillation.
Manufactured from heat‑treated alloy steel (42CrMo4) with induction‑hardened bearing journals, the 380902193 Pin I delivers exceptional resistance to bending, fretting, and surface fatigue. The pin features precision‑ground outer diameters, accurately positioned cross‑drilled holes for retaining bolts or spring pins, and a corrosion‑resistant zinc‑nickel coating.
The 380902193 pin has a nominal diameter of 35 mm and an overall length of 165 mm (exact as per XCMG drawing). It is through‑hardened to 38–42 HRC core, with surface hardness of 55–60 HRC on the bearing journals to resist wear. A polished finish on the journals (Ra ≤0.4 μm) ensures smooth rotation within the bushing, reducing friction and extending service life.
Typical applications on XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders include the main articulation pin (connecting front and rear frames), the blade lift cylinder pivot pins, and the circle rotation drive linkage pins. A bent, cracked, or excessively worn pin will cause joint looseness, erratic machine handling, accelerated bushing wear, and potential structural damage.
Replacing a damaged pin with genuine XCMG 380902193 restores original clearance, eliminates play, and ensures the safety and precision of your grader’s steering, blade control, and articulation systems. Keep this Pin I in your parts inventory for major linkage or chassis repairs.
| Parameter | Specification |
|---|---|
| OEM Number | 380902193 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Pivot Pin (Grade I) |
| Nominal Diameter (d) | 35.00 mm (±0.015 mm) |
| Overall Length (L) | 165.0 mm (±0.3 mm) |
| Bearing Journal Length (each) | 55.0 mm (ground area) |
| Cross‑Hole Diameter (retaining) | 8.0 mm (for M8 bolt or spring pin) |
| Material | Alloy steel (42CrMo4 / AISI 4140), forged blank |
| Core Hardness | 38–42 HRC (through‑hardened & tempered) |
| Surface Hardness (journals) | 55–60 HRC (induction hardened, case depth 1.0–1.5 mm) |
| Surface Finish (bearing areas) | Ra ≤0.4 μm (ground & superfinished) |
| Corrosion Protection | Zinc‑nickel plating (720h salt spray) + yellow passivation |
| Static Load Capacity (bending) | ≈85 kN (8,700 kgf) at centre |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Lubrication | Grease through central fitting (if equipped) |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1143-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 380902100, 380902150, 380902190 |
The 380902193 Pin I is a primary pivot element in the grader’s articulation joint between the front and rear frames. It allows the machine to articulate for steering while carrying up to 50% of the machine’s weight and side loads from grading.
In the blade lift linkage, this pin connects the hydraulic cylinder rod end to the lift arm, transferring the cylinder force to raise and lower the blade. A worn pin causes blade drift, poor grade control, and accelerated wear of the cylinder eye and bushings.
The induction‑hardened journals provide a hard, smooth surface for the urethane or bronze bushings to pivot on. The pin’s central cross‑hole accepts a retaining bolt or spring pin, ensuring the pin cannot walk out under oscillation.
Replacing a worn or damaged pin with genuine XCMG 380902193 restores factory alignment, eliminates joint slop, and improves steering precision and blade responsiveness.
XCMG selects 42CrMo4 chromium‑molybdenum steel for its exceptional toughness and through‑hardening capability. The pin blank is hot‑forged to align grain flow and eliminate internal voids.
After rough turning, the pin is through‑hardened (850°C oil quench, 560°C temper) to achieve a uniform core hardness of 38–42 HRC, providing strong resistance to bending fatigue.
Induction hardening selectively heats the bearing journals to 900°C followed by rapid quench, creating a hard case (55–60 HRC) to a depth of 1.5 mm, while the centre remains tough.
This dual‑hardness design resists surface galling and fretting while maintaining core ductility to absorb shock loads from the blade contacting rocks or frozen ground.
After heat treatment, the journals are centreless ground to achieve a precise diameter tolerance of ±0.015 mm and a surface finish of Ra 0.4 μm, ensuring optimal clearance with the bushing and reducing friction.
Before installing a new 380902193 pin, clean the housing bore and inspect the bushings for wear. Measure the bushing inner diameter – it should be between 35.04 mm and 35.10 mm for a new pin.
Apply a thin film of EP2 grease to the pin journals. Insert the pin through the aligned bushings, using a soft‑faced mallet if necessary. The pin should slide with moderate resistance – never force it.
Align the cross‑hole with the retaining bolt hole in the housing. Insert the retaining bolt or spring pin and torque the bolt to the value in the service manual (typically 90 Nm for M12).
Check axial end‑play – maximum allowable is 0.4 mm. If excessive, replace the thrust washers or the bushings. Keep spare 380902193 pins in your workshop for articulation or linkage overhauls.
Aftermarket pins are often made from low‑carbon steel (e.g., 1045) that lacks induction hardening, causing rapid wear and galling of the bushing and pin journal within 500 hours.
Counterfeit pins frequently have undersized diameters (by 0.05–0.15 mm), resulting in excessive play that destroys the bushing and allows the joint to hammer, leading to housing cracks.
Some aftermarket pins have incorrect cross‑hole locations, making it impossible to install the retaining bolt without re‑drilling – a dangerous practice that weakens the pin.
Genuine XCMG pins are 100% dimensional inspected, magnetic particle tested for cracks, and supplied with a hardness certificate. XCMG provides a 12‑month warranty. Using OEM pins prevents unexpected joint failure and the high cost of repairing damaged housings.
Audible indicators: clunking or knocking when articulating the grader or when the blade lift is operated. Visual signs: a visible step worn into the journal, rust pitting, or a bent shaft (detectable with a straightedge).
If the pin can be moved by hand axially (end‑play >0.5 mm) or radially (clearance >0.3 mm), it has exceeded its service limit and must be replaced.
Preventive replacement is recommended every 4,000 operating hours or during any major overhaul of the articulation joint, blade linkage, or cylinder mount. The pin is a wear component – replacing it proactively prevents damage to the more expensive housing and bushings.
Keep a stock of 380902193 pins in your fleet inventory. When you detect any looseness in a pivot joint, replace the pin immediately. Proactive pin replacement ensures precise machine control, operator safety, and extended component life.
The XCMG 380902193 Pin I is stocked in regional distribution centers: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China).
Standard air freight delivers within 2–5 business days worldwide. Expedited courier (DHL/FedEx) provides 1–2 day shipping for urgent linkage or articulation repairs.
Bulk orders of 10+ pins receive volume discounts and can be shipped by sea freight. Each pin is individually wrapped in VCI paper and foam‑lined box to prevent surface damage.
For large fleets, consignment stock programs ensure immediate availability. Technical drawings, hardness test reports, and installation torque data are available upon request.
Don’t risk loss of steering or blade control due to a worn pivot pin. Order the genuine XCMG 380902193 Pin I today and restore tight, precise connections on your motor grader’s articulation joint, blade linkage, and cylinder mounts.
Upgrade your grader’s mechanical reliability with XCMG genuine pins. Engineered for high strength, wear resistance, and perfect fit. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader moving accurately and safely – choose 380902193 OEM pin.
