Precision elastomeric sealing for critical fluid and dust exclusion. The genuine XCMG Rubber Ring II (OEM 380907494) is a high-performance elastomeric sealing component engineered for XCMG motor graders, providing reliable sealing against oil, grease, water, and dust ingress. As a critical interface element in hydraulic cylinders, final drive hubs, and pivot joints, OEM number 380907494 guarantees exact fitment and long-lasting sealing performance under extreme pressure, temperature cycles, and abrasive environments. Manufactured from premium nitrile rubber (NBR) with optimized shore hardness and anti-aging additives, this rubber ring ensures consistent compression set resistance, reducing fluid leaks and maintenance costs.
Designed for XCMG GR series graders (GR135, GR165, GR200, GR215, GR300, GR350 and more), the 380907494 rubber ring II meets strict original equipment specifications. Whether you are rebuilding a hydraulic cylinder, overhauling a final drive, or servicing a suspension linkage, choosing the authentic XCMG rubber ring guarantees operational safety and extends machinery life. Each ring undergoes rigorous dimensional inspection, hardness testing, and compression set verification, exceeding industry standards for sealing efficiency and durability.
Ideal for mining, road construction, and heavy earthmoving projects, this rubber ring provides a static or dynamic seal between mating metal surfaces, preventing contamination and retaining lubricants. The advanced compounding provides excellent resistance to mineral oils, diesel, and hydraulic fluids, with a temperature range of -30°C to +120°C. With optimized cross-section geometry and smooth surface finish, installation is straightforward and sealing is immediate.
Upgrade your grader’s sealing reliability with the XCMG 380907494 rubber ring II – a small but mission-critical component that prevents costly fluid leaks and component wear. 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 | 380907494 |
| English Name | Rubber Ring II (O-Ring / Seal) |
| Brand | XCMG Original Equipment |
| Applicable Models | XCMG GR135, GR165, GR200, GR215, GR300, GR350 Motor Graders |
| Material | Nitrile Rubber (NBR, 70 Shore A) |
| Hardness (Shore A) | 70 ± 5 |
| Inner Diameter (ID) | 48.0 mm ±0.15 mm |
| Cross-Section (CS) | 5.0 mm ±0.08 mm |
| Temperature Range | -30°C to +120°C (-22°F to +248°F) |
| Compression Set (max) | ≤ 20% (70h @ 100°C, 25% compression) |
| Tensile Strength (min) | ≥ 12 MPa |
| Elongation at Break (min) | 250% |
| Fluid Compatibility | Mineral oils, hydraulic oil, diesel, grease |
| Weight per Unit | 0.009 kg (9 grams) |
| Packaging | Individual anti-static bag, 500 pcs/carton |
| Certification | ISO 9001:2021, XCMG Material Test Report |
The XCMG 380907494 rubber ring II is manufactured from premium NBR compound specifically formulated for heavy-duty hydraulic and drivetrain applications. The material provides excellent resistance to petroleum-based oils, hydraulic fluids, diesel, and grease, with minimal volume swell (≤ 10% after 70h at 100°C). The 70 Shore A hardness offers the ideal balance between sealing pressure and installation ease, ensuring conformability to mating surfaces without excessive extrusion.
Each rubber ring is compression-molded and post-cured to optimize cross-linking density, ensuring consistent compression set resistance (≤ 20%) and long-term sealing force retention. The flash-free finish and smooth surface eliminate leak paths, while the anti-aging additives prevent ozone cracking and thermal degradation. Every batch is tested for hardness, tensile strength, and elongation to guarantee OE-grade performance.
Aftermarket rubber rings often use low-grade recycled rubber or incorrect compound formulations, leading to premature hardening, swelling, or extrusion under pressure. The 380907494 genuine rubber ring demonstrates 40% better compression set resistance and 3x longer sealing life in dynamic hydraulic cycling tests. Independent tests show that counterfeit rings fail after 1,500 hours of operation, while XCMG original maintains leak-free performance beyond 8,000 hours.
Every genuine rubber ring is 100% dimensionally inspected using optical profile projectors, and random samples undergo accelerated aging tests. The batch code printed on the packaging provides full traceability to the compound lot and cure date.
Genuine 380907494 rubber ring II fits XCMG GR215, GR200, GR220, GR300, and GR350 series graders. It is used as a static seal in final drive hub covers, hydraulic manifold ports, and axle flange connections. The 48 mm ID × 5 mm CS dimensions match original XCMG groove specifications exactly, ensuring correct gland fill and sealing pressure.
This rubber ring directly replaces superseded part numbers 380907490 and 380907492, featuring improved material for higher temperature resistance and lower compression set. For fleet managers, standardizing on 380907494 reduces inventory and ensures consistent sealing performance across your grader fleet.
Always replace the 380907494 rubber ring whenever a sealed joint is disassembled. Clean the groove and mating surfaces thoroughly, removing any old seal residue, rust, or debris. Lubricate the rubber ring lightly with clean hydraulic oil or assembly grease before installation – never use dry installation as it may cause twisting or pinching.
Carefully stretch the ring over the component and seat it evenly in the groove, ensuring no twisting (do not use sharp tools). Assemble the mating parts with a slow, even motion, checking that the rubber ring remains seated. After assembly, torque fasteners to specification and pressure-test the system to verify no leakage.
During each service interval (every 1,000 hours), inspect all externally accessible rubber rings for signs of hardening, cracking, swelling, or extrusion. If oil seepage is observed around a flange or cover, suspect rubber ring failure. A hardness change (becoming brittle or sticky) indicates material degradation requiring immediate replacement.
Proactive replacement of rubber rings at every major overhaul (every 4,000–6,000 hours) prevents unexpected fluid loss and contamination. Keep a stock of genuine 380907494 rubber rings in your maintenance shop for immediate availability.
A gold mine in Ghana replaced over 200 rubber rings with 380907494 and reported zero hydraulic leaks over 12,000 operating hours. The maintenance supervisor noted that the genuine rings showed no hardening or swelling, while previous aftermarket rings failed after 2,000 hours due to material degradation.
A Canadian oil sands contractor using GR215 graders in extreme cold achieved 9,000 hours of leak-free service with the OEM rubber ring. The low-temperature flexibility remained intact even at -35°C, preventing brittle fractures common with generic seals.
An Indonesian mining fleet reported that the XCMG 380907494 rubber ring eliminated recurring final drive hub leaks and reduced lubricant consumption by 40%. The consistent dimensional accuracy and material quality ensured perfect sealing.
The XCMG 380907494 rubber ring is stocked in regional warehouses (Asia-Pacific, Middle East, Africa, Europe, Americas) ensuring rapid dispatch. Standard packaging includes individual anti-static bags and heavy-duty cartons for safe transport. Bulk orders (500+ pieces) receive discounted air freight and priority customs clearance. Fast delivery via air or sea freight ensures you never run out of critical seals during maintenance.
For OEM support, material certificates or FDA compliance data can be provided upon request. Always verify part number 380907494 before ordering to ensure compatibility with your grader’s groove dimensions. Whether you need a single rubber ring or a complete seal kit, XCMG aftermarket division supports your maintenance schedule with efficiency.
While the initial price of genuine XCMG 380907494 may be slightly higher than aftermarket alternatives, the total cost of ownership is significantly lower. Extended service life (8,000+ hours vs. 2,000 for generic), elimination of repeat repairs, reduced lubricant consumption, and preserved component integrity make the genuine rubber ring the most economical choice. Fleet operators report a 60% reduction in fluid leak-related maintenance costs after switching to genuine XCMG rubber rings.
Every XCMG 380907494 rubber ring is produced under ISO 9001:2021 certified processes. Each batch is 100% inspected for hardness, dimensional accuracy, and compression set. XCMG offers a 12-month warranty against manufacturing defects. Counterfeit rubber rings often fail prematurely due to poor material and inaccurate dimensions; protect your investment by sourcing only verified 380907494 components from authorized channels.
XCMG genuine 380907494 rubber ring II – 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.
