The 380600521 Lower Rubber Gasket is a genuine XCMG sealing component designed for motor grader engine oil pans and transmission housings. This precision-molded gasket prevents oil leaks, dirt ingress, and maintains proper sealing pressure under vibration. The 380600521 lower rubber gasket is manufactured from high-grade NBR rubber compound, providing excellent resistance to hot oil, diesel, and coolant. It is a critical component for maintaining clean engine compartments and preventing fluid loss on GR series graders.
The 380600521 Lower 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 features a trapezoidal cross-section that provides a self-energizing seal under compression. It has a nominal length of 1240 mm (installed profile) and a width of 18 mm, with pre-formed corners that match the oil pan flange exactly. As a genuine XCMG part, it includes the original alignment tabs for easy installation.
Engineered for extreme durability, the 380600521 Lower Rubber Gasket has an operating temperature range of -40°C to +120°C, suitable for all climates. The rubber 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 and molded without flash. Using OEM gaskets eliminates the risk of leaks caused by improper fit or low-quality materials, protecting your grader’s engine and transmission.
| Parameter | Specification |
|---|---|
| OEM Number | 380600521 |
| Product Name | Lower Rubber Gasket (Oil Pan / Transmission 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% |
| Temperature Range | -40°C to +120°C |
| Cross-section Shape | Trapezoidal (self-energizing) |
| Installed Length (approx.) | 1240 mm |
| Width | 18 mm |
| Thickness (compressed) | 3.0 mm |
| Fluid Compatibility | Engine oil, diesel, coolant, ATF |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Aftermarket gaskets often use recycled rubber or improper compounds that harden, crack, or swell after exposure to hot oil. The genuine 380600521 Lower 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%. This reliability prevents messy oil leaks and environmental hazards.
Each 380600521 Lower 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 380600521 Lower 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 engine oil to the gasket faces to aid assembly. Position the gasket using the alignment tabs, then install the oil pan or cover. Torque the bolts in a cross pattern to the value specified in the service manual (typically 25 Nm for M8 bolts). Re-torque after 50 hours of operation.
Inspect the 380600521 Lower Rubber Gasket during every oil change. 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 mating flange for flatness (warpage not to exceed 0.1mm per 100mm). Store spare gaskets in a cool, dark place away from ozone sources. Keep a stock of this gasket in your parts room, as oil pan leaks are a common nuisance on aging machines.
A leaking lower gasket allows oil to drip onto hot exhaust components, creating fire hazards and environmental contamination. The genuine 380600521 Lower Rubber Gasket restores a perfect seal, eliminating oil loss and keeping the engine bay clean. Operators report that using OEM gaskets reduces oil consumption by up to 0.5 liters per 500 hours and prevents slippery conditions under the machine. The precise fit also ensures that the oil pan does not crack from uneven bolt loads.
In a fleet study of 30 XCMG GR215 graders, those equipped with genuine 380600521 Lower Rubber Gaskets experienced 95% fewer oil pan leaks over 4,000 hours compared to machines using aftermarket cork or rubber gaskets. The improved sealing also kept the engine bay cleaner, reducing the risk of belt slippage and alternator failure. For contractors who value safety and uptime, 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 380600521 Lower 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 380600521 Lower 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 380600521 Lower Rubber Gasket directly replaces original part numbers 380600520 and 380600522. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This gasket is used for both the engine oil pan (Dongfeng Cummins 6BTAA5.9) and the torque converter housing on some models. For transmission pan gaskets, refer to part 380600523. Always verify the application by checking your machine’s serial number.
When replacing a leaking gasket, also order a new oil filter (part 380600524) and drain plug washer (380600525). XCMG recommends changing the engine oil when replacing the lower gasket to prevent contamination. Keep one spare 380600521 Lower 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 380600521 Lower Rubber Gasket to ensure perfect fitment.
