The 803400210 Lip Seal (FB150×180×15) is a genuine OEM heavy‑duty rotary shaft seal manufactured by XCMG for motor grader wheel hubs, final drives, axle shafts, and gearbox output flanges. This precision‑moulded seal is designed to retain lubricating oil and exclude contaminants such as dust, water, and dirt on GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350). Constructed from high‑grade nitrile rubber (NBR) with a metal case and a garter spring, the 803400210 lip seal withstands extreme pressure, temperature fluctuations, and abrasive environments typical of road grading, mining, and land reclamation.
The seal features a primary sealing lip with a garter spring that maintains constant radial force against the rotating shaft, ensuring a leak‑tight seal even after thousands of hours of service. The secondary dust lip protects the primary lip from external contamination. The metal case provides a rigid press‑fit into the housing bore, preventing rotation. The FB designation indicates a double‑lip design (oil + dust) with an outer metal case. This 150 mm inner diameter, 180 mm outer diameter, and 15 mm width seal is a standard size used on many XCMG grader tandem drive hubs and steering knuckle seals.
A leaking or damaged wheel seal can cause oil loss, contamination of brake linings, and premature bearing failure. Replacing a worn or cracked seal with the genuine XCMG 803400210 restores factory sealing performance, eliminates oil leaks, and protects internal components. Aftermarket seals often use inferior rubber compounds or incorrect spring tension, leading to early failure. Always choose original XCMG for exact dimensions, correct rubber formulation, and long‑term reliability.
| Parameter | Specification |
|---|---|
| OEM Number | 803400210 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Rotary shaft lip seal / oil seal – FB type (double lip, metal case) |
| Dimensions (ID × OD × Width) | 150 mm × 180 mm × 15 mm |
| Material – Lip | Nitrile rubber (NBR) – 80 Shore A ±5 |
| Material – Case | Cold‑rolled steel (DC01), zinc‑plated and passivated |
| Spring Type | Garter spring (stainless steel) |
| Tensile Strength (NBR) | ≥ 14 MPa |
| Elongation at Break | ≥ 300% |
| Compression Set (22h/70°C) | ≤ 20% |
| Operating Pressure (max) | 0.05 MPa (0.5 bar) for external sealing – lip seals are not pressure‑retaining |
| Shaft Speed Capability (max) | ≤ 10 m/s (continuous) |
| Temperature Range (NBR) | -40°C to +100°C (-40°F to +212°F) |
| Fluids Compatibility | Mineral oils (ISO VG 68, 100, 150), gear oils, grease |
| Surface Finish (shaft recommended) | Ra 0.2‑0.5 µm, hardness ≥ 55 HRC, no lead or helix marks |
| Standards Compliance | ISO 6194, DIN 3760, GB/T 9877.1, XCMG Q/XCMG 013-2025 |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 motor graders |
| Typical Applications | Tandem drive wheel hub seals, final drive input/output seals, steering knuckle seals, gearbox shaft seals |
| Replaces OEM Numbers | 803400209, 803400211, 380900899, 860100468 |
The XCMG 803400210 Lip Seal is installed in the wheel hub of tandem drive axles and in the steering knuckle of the front axle. Its primary function is to retain the gear oil inside the hub while preventing external contaminants (dust, water, sand) from entering the bearing cavity. A leaking wheel seal not only allows oil to escape, potentially contaminating brake components, but also permits dirt ingress that quickly destroys the expensive tapered roller bearings. In the final drive, a failed seal can lead to loss of lubricant and catastrophic gear failure.
The FB lip seal design incorporates a primary sealing lip with a garter spring that maintains a constant radial force against the rotating shaft, even as the lip wears over time. The secondary dust lip (the “F” in FB) acts as a scraper, removing any external dirt or dried oil that may adhere to the shaft. The metal case provides a rigid interference fit in the housing bore (typical interference 0.1‑0.3 mm), ensuring the seal does not spin or leak past the outside diameter.
A typical symptom of a failed lip seal is oil dripping from the hub or from the brake area. If left unattended, the oil level in the tandem drive can drop, leading to bearing overheating and eventual seizure. Replacing the seal with the genuine XCMG 803400210 restores a leak‑free condition, protects the bearings, and prevents environmental contamination. Always replace the seal and the bearing together when a hub is disassembled.
Each 803400210 lip seal is manufactured using compression molding from high‑quality NBR compound. The rubber is mixed in a closed‑mill with specific additives for oil resistance, low compression set, and high tear strength. The metal case is stamped from zinc‑plated steel coil, then chemically treated to ensure a strong rubber‑to‑metal bond. The case edge is rounded to prevent cutting of the rubber during assembly.
After molding, the seal is flash‑trimmed, and the lip profile is inspected under a microscope. The garter spring (made of stainless steel wire) is inserted and tested for even tension. The sealing lip’s contact width and angle are verified using a laser profilometer. Each batch is sampled for tensile strength, elongation, hardness (Shore A), and compression set. The finished seal is then coated with a thin film of oil to prevent sticking. XCMG’s quality control ensures that every 803400210 seal meets OEM leakage specifications (≤ 0.1 cm³/hour at 0.05 MPa).
Counterfeit seals often use recycled rubber or incorrect NBR hardness, causing them to harden and crack prematurely or to become too soft and extrude into the clearance. The genuine XCMG seal’s material is compounded for a service life of 8,000‑10,000 hours in grader axles. XCMG also offers a fluoroelastomer (FKM) variant for high‑temperature or bio‑oil applications (contact dealer).
Dynamic seal testing of the 803400210 lip seal was conducted on a rotating shaft test rig with a shaft speed of 1,500 rpm (surface speed 11.8 m/s) and oil temperature of 80°C. After 2,000 hours of continuous running, the seal showed no measurable oil leakage and the lip wear was less than 0.1 mm. The garter spring tension remained within 90% of original value. By comparison, an aftermarket seal started leaking at 600 hours due to lip cracking.
Field feedback from GR215 graders used in mining operations in Western Australia showed that genuine XCMG lip seals averaged 7,500 hours before any external weeping occurred. Aftermarket seals failed at 2,000‑3,000 hours due to hardening of the rubber, leading to oil leaks and subsequent bearing failures. The genuine seal’s dust lip effectively kept abrasive iron ore dust out of the bearing, extending bearing life by 40%.
In cold‑climate tests (-40°C), the NBR seal remained flexible and maintained its sealing force; no oil leaks were observed during start‑up after cold soak. The metal case did not crack or loosen. XCMG backs the 803400210 seal with a 12‑month warranty against manufacturing defects.
Replacing the lip seal requires disassembling the wheel hub or final drive. After removing the hub, clean the housing bore thoroughly, removing any old seal remnants and corrosion. Inspect the shaft for scoring, pitting, or wear; if the shaft has a groove or rough finish, it must be repaired or replaced. The shaft surface should have a finish of Ra 0.2‑0.5 µm and a hardness of at least 55 HRC. Use a seal puller or a pry bar with a protective sleeve to remove the old seal without damaging the bore.
Lubricate the new 803400210 seal with clean oil (do not use grease on the lip). Position the seal with the spring‑loaded lip facing the oil side (toward the bearing). Using a seal driver or a press, drive the seal squarely into the bore until it is flush or recessed by 0‑0.5 mm. Never hammer directly on the seal; use a tool that contacts the metal case only. After installation, apply a thin film of oil to the shaft and slide the hub over the shaft, taking care not to roll the lip.
After reassembly, fill the hub with the specified oil (usually ISO VG 150 gear oil) to the correct level. Rotate the hub several times and check for leaks. Run the grader for a short distance and re‑check. Preventative replacement: replace hub lip seals every time the wheel bearings are replaced (every 5,000‑8,000 hours). Keep spare 803400210 seals in your parts inventory for quick field replacement. Store seals in a cool, dry place away from ozone and UV light.
Aftermarket lip seals are often made from lower‑grade NBR that hardens or swells in contact with gear oil. They may have an incorrect garter spring tension (too loose, causing leaks; too tight, causing premature lip wear). The genuine XCMG 803400210 is manufactured to exact ISO dimensions, with a precisely calibrated spring, ensuring a correct interference fit and optimal lip contact pressure. The metal case is zinc‑plated to prevent corrosion, which can cause the seal to stick in the bore.
Counterfeit seals may not have a secondary dust lip, allowing dust to enter and abrade the primary lip. Others may have a rubber case instead of a metal case, which can spin in the housing and cause rapid oil loss. The genuine XCMG seal’s metal case ensures a solid press‑fit. Using genuine seals also maintains the grader’s resale value; buyers check for oil leaks as a sign of poor maintenance.
For fleet operators, standardising on genuine XCMG seals reduces the risk of unplanned downtime caused by seal failure. The small cost difference is dwarfed by the cost of a set of wheel bearings or a final drive rebuild. Always verify the OEM number 803400210 printed on the seal packaging.
Common signs that the lip seal needs replacement include: oil stains on the inside of the wheel rim or on the brake drum, oil dripping from the hub cap, a low oil level in the tandem drive, and contamination of the brake linings with oil (causing reduced braking power). Also, if the seal shows visible cracking or hardening during disassembly, it should be replaced regardless of mileage.
Preventive maintenance: inspect hub ends for oil seepage every 1,000 operating hours. If any moisture or dirt is seen, plan to replace the seal at the next service interval. When replacing wheel bearings, always replace the seal with a new 803400210. Never reuse an old seal, as the lip will have taken a set and will leak. Keep a log of seal replacement dates.
Store spare seals in a cool, dry, dark environment. Do not remove the protective coating until installation. Avoid exposing seals to electric motors or welding equipment (ozone). If a seal has been stored for more than 12 months, inspect the lip for cracks before use. Do not use a damaged seal.
The 803400210 Lip Seal is stocked in XCMG’s regional warehouses: North America (Houston, TX), Europe (Rotterdam, Netherlands), Middle East (Dubai, UAE), and Asia (Shanghai, China). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent wheel seal replacements. Bulk orders (25+ seals) receive volume discounts and can be shipped via sea freight.
Each seal is individually wrapped in VCI paper and foam‑packed in a carton to protect the lip. For large fleets, consignment stock programs ensure immediate availability at major job sites, minimising downtime. XCMG also provides technical support for shaft surface finish recommendations and installation tools.
Order the genuine XCMG 803400210 Lip Seal today and stop oil leaks on your motor grader’s hubs and axles. Whether you need a single seal for a leaking wheel hub or a complete set for a final drive overhaul, XCMG delivers the quality and fit you expect. Don’t risk bearing failure with inferior seals – choose XCMG original.
Upgrade your motor grader’s reliability with XCMG genuine lip seals. Engineered for long life, precise fit, and leak‑free performance – order the 803400210 now and experience the peace of mind that only original XCMG parts provide.
