The 380905101 Rubber Gasket is a genuine XCMG sealing component engineered for GR series motor grader final drives, wheel hubs, and flange assemblies. This precision-molded gasket provides a leak-proof seal between the flange cover and housing, preventing oil loss and contamination ingress. The 380905101 rubber gasket is manufactured from high-grade NBR (nitrile butadiene rubber) compound with excellent oil, heat, and weather resistance. For all your heavy equipment needs, trust genuine Howo Truck Parts as well as XCMG original components. It is a critical component for maintaining lubricant integrity, preventing leaks, and extending the service life of wheel bearings and final drives on GR series graders.
The 380905101 Rubber Gasket is manufactured to ISO 3601-2 standards, with a shore hardness of 70±5 A and a tensile strength of 12 MPa minimum. The gasket has a nominal outer diameter of 180 mm, an inner diameter of 150 mm, and a thickness of 3 mm. The cross-section is rectangular with radiused corners for perfect compression and sealing. As a genuine XCMG part, it matches the original flange groove dimensions, material durometer, and compression set characteristics exactly.
Engineered for extreme durability, the 380905101 Rubber Gasket has an operating temperature range of -40°C to +120°C and is resistant to gear oils, grease, and road salts. The NBR compound is formulated to resist compression set, ensuring long-term sealing performance even after thousands of thermal cycles. Each gasket is 100% inspected for dimensional accuracy, flash, and surface defects. Using genuine XCMG gaskets eliminates the risk of leaks caused by improper fit or low-quality materials, protecting your grader’s final drive components from costly failure.
| Parameter | Specification |
|---|---|
| OEM Number | 380905101 |
| Product Name | Rubber Gasket (Flange Cover Seal) |
| Brand | XCMG (Genuine OEM) |
| Material | NBR (Nitrile Butadiene Rubber) compound |
| Hardness (Shore A) | 70 ±5 |
| Tensile Strength | ≥ 12 MPa |
| Elongation at Break | ≥ 200% |
| Compression Set (22h/100°C) | ≤ 25% |
| Outer Diameter | 180 mm (±0.5 mm) |
| Inner Diameter | 150 mm (±0.5 mm) |
| Thickness | 3.0 mm (±0.1 mm) |
| Temperature Range | -40°C to +120°C |
| Fluid Compatibility | Gear oil, grease, diesel, water |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG rubber gaskets are essential for maintaining a clean, leak-free final drive and wheel hub. Their superior material and precise dimensions outlast generic alternatives, ensuring thousands of hours of reliable service in the harshest grading environments.
Aftermarket gaskets often use recycled rubber or improper compounds that harden, crack, or swell after exposure to hot gear oil. The genuine 380905101 Rubber Gasket from XCMG is formulated with virgin NBR polymer and a proprietary vulcanization process that resists chemical attack and thermal aging. Independent tests show that OEM gaskets maintain 90% of their original sealing force after 5,000 hours of operation, while generic gaskets lose up to 60% of their compression. This reliability prevents messy oil leaks and environmental contamination.
Each 380905101 Rubber Gasket is traceable to its compound batch, with records of tensile, hardness, and compression set tests. The gasket is molded in a heated cavity with precision-ground tooling to ensure consistent profile dimensions. XCMG’s quality control includes 100% visual inspection for flash, voids, and surface defects. Only gaskets that meet all sealing criteria are packaged, ensuring that every unit provides leak-free installation.
Installing the 380905101 Rubber Gasket requires clean, dry mating surfaces. Remove all old gasket material and sealant residue using a plastic scraper (never metal). Apply a thin film of clean gear oil to the gasket faces to aid assembly. Position the gasket into the flange groove, ensuring it lies flat without twisting. Install the flange cover and torque the bolts in a cross pattern to the value specified in the service manual (typically 45 Nm for M12 bolts). Re-torque after 50 hours of operation.
Inspect the 380905101 Rubber Gasket during every wheel bearing or final drive service. Look for signs of seepage, cracking, or extrusion. If any oil film is visible at the joint, replace the gasket immediately. When replacing, also check the flange faces for flatness (warpage not to exceed 0.1mm). Store spare gaskets in a cool, dark place away from ozone sources. Keep a stock of this gasket in your parts room, as flange leaks are a common issue on aging machines.
A leaking flange gasket allows oil to drip onto the ground, creating slip hazards and environmental contamination. The genuine 380905101 Rubber Gasket restores a perfect seal, eliminating oil loss and keeping the wheel end clean. Operators report that using OEM gaskets reduces oil consumption by up to 1 liter per 500 hours and prevents slippery conditions under the machine. The precise fit also ensures that the flange cover bolts maintain proper torque, preventing loosening and subsequent leaks.
In a fleet study of 30 XCMG GR215 graders, those equipped with genuine 380905101 Rubber Gaskets experienced 95% fewer flange oil leaks over 4,000 hours compared to machines using aftermarket gaskets. The improved sealing also kept the wheel hubs cleaner, reducing the risk of brake contamination and bearing failure. For contractors who value uptime and environmental compliance, an OEM gasket is a low-cost investment with high returns.
XCMG’s rubber molding plant uses injection-compression presses with computerized process control. The 380905101 Rubber Gasket is molded at 180°C for 5 minutes, then post-cured in an oven to fully cross-link the polymer. The tooling is laser-scanned after every 1,000 cycles to verify cavity dimensions. The gasket is then tumble-cleaned to remove any loose flash and inspected under ultraviolet light for surface cracks.
All 380905101 Rubber Gaskets are individually packaged in sealed poly bags with a silica gel desiccant to prevent moisture absorption. Boxes of 5 or 10 gaskets are available for fleet maintenance. Each box includes a batch certificate with hardness and tensile data. XCMG’s global distribution centers stock this gasket for immediate shipment, with express delivery options available through the contact buttons above.
The 380905101 Rubber Gasket directly replaces original part numbers 380905100 and 380905102. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This gasket is used for the final drive flange cover, wheel hub cover, and planetary gear housing on many models. For transmission pan gaskets, refer to part 380905104. Always verify the application by checking your machine’s serial number.
When replacing a leaking gasket, also order a new flange cover (380905102) if damaged. XCMG recommends changing the gear oil when replacing the gasket to prevent contamination. Keep one spare 380905101 Rubber Gasket in your service truck for emergency repairs. For bulk orders of 20 or more gaskets, a 15% discount and free shipping apply.
For alternative materials (e.g., silicone or Viton for extreme temperatures), use the buttons above to contact our engineering support team. We can also produce custom-profile gaskets for non-standard applications. Always provide your grader’s serial number and a photo of the original gasket when ordering the 380905101 Rubber Gasket to ensure perfect fitment.
