The 860500586 Ruj‑Type Seal (50×65×11 mm) is a genuine OEM rotary shaft oil seal manufactured by XCMG for motor graders and heavy construction equipment. This precision‑engineered seal prevents hydraulic fluid leakage and excludes contaminants from rotating shafts in hydraulic motors, pumps, gearboxes, and wheel hubs on XCMG GR series motor graders. Constructed from premium nitrile rubber (NBR) with a metal case and a garter spring, the 860500586 seal is designed to withstand extreme operating pressures, high rotational speeds, and temperature variations in demanding grading environments.
The 50×65×11 designation indicates an inner diameter of 50 mm, an outer diameter of 65 mm, and a width of 11 mm. This Ruj‑type seal (also known as a rotary shaft seal or radial lip seal) features a single sealing lip with a spring to maintain contact pressure against the shaft, ensuring a reliable seal even under dynamic conditions. It directly replaces worn, hardened, or leaking seals on XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders.
Proper sealing is critical for preventing oil loss, reducing friction, and protecting bearings from contamination. A failed seal can lead to premature bearing failure, oil leaks, and costly downtime. Replacing a damaged seal with the genuine XCMG 860500586 restores system integrity and extends component life.
| Parameter | Specification |
|---|---|
| OEM Number | 860500586 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Rotary Shaft Oil Seal / Ruj‑Type Radial Lip Seal |
| Dimensions (ID × OD × Width) | 50 mm × 65 mm × 11 mm (±0.2 mm) |
| Material | Nitrile rubber (NBR), Shore A 70±5 |
| Case Material | Carbon steel (DC01), zinc‑plated |
| Spring Material | Stainless steel (AISI 302) / carbon steel |
| Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Maximum Shaft Speed | 10 m/s (continuous) |
| Maximum Pressure (static) | 0.05 MPa (0.5 bar) |
| Compatible Fluids | Mineral oil, hydraulic oil, gear oil, diesel, grease |
| Shaft Surface Hardness | ≥ HRC 45 |
| Shaft Surface Roughness (Ra) | 0.2 – 0.8 µm |
| Corrosion Resistance | 500+ hours salt spray (ASTM B117) on case |
| Standards | ISO 6194 / DIN 3760 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 860500501, 860500545, 860500572 |
The XCMG 860500586 Ruj‑Type Seal is a critical component in preventing oil leaks and contamination ingress on rotating shafts. It is commonly used in hydraulic motors, wheel hub assemblies, final drives, and gearbox output shafts on motor graders. The seal’s primary lip, reinforced by a garter spring, maintains constant contact with the shaft, creating a dynamic seal that adapts to minor shaft misalignment and runout.
Without a properly functioning shaft seal, hydraulic oil or gear oil can escape, leading to low oil levels, increased friction, and eventual component seizure. Contaminants such as dust, water, and dirt can enter the housing, causing abrasive wear on bearings and gears. The 860500586 seal is designed to withstand the harsh conditions of motor grader operation, including temperature extremes, high rotational speeds, and exposure to road salt and mud.
The 50×65×11 dimensions are standard for many XCMG hydraulic motors and wheel end applications. The seal fits into a housing bore of 65 mm and seals against a shaft of 50 mm diameter. The 11 mm width ensures adequate sealing contact area while fitting within compact housing designs.
Each 860500586 seal is manufactured in an ISO 9001:2015‑certified facility using high‑grade nitrile rubber (NBR) compound. The rubber is molded under controlled temperature and pressure to achieve the exact Shore A hardness of 70±5. The sealing lip profile is precision‑cut to ensure optimal hydrodynamic performance, reducing friction and heat generation while maintaining a positive seal.
The metal case is stamped from zinc‑plated carbon steel to resist corrosion. The garter spring is made from stainless steel (AISI 302) to maintain tension even in corrosive environments. After assembly, each seal is 100% visually inspected for flash, voids, and lip damage. Random samples are tested for tensile strength, elongation, compression set, and oil resistance per ASTM standards.
The seal is also tested on a dynamic test rig at speeds up to 10 m/s and temperatures from -40°C to +120°C to verify leak‑tight performance. Only seals that pass all tests are approved for sale as genuine XCMG components.
Proper installation of the 860500586 seal is essential for achieving a leak‑free seal. Before installation, inspect the shaft for nicks, burrs, or scoring. The shaft should have a surface finish of Ra 0.2–0.8 µm and a hardness of at least HRC 45. Clean the housing bore thoroughly and apply a thin film of oil to the seal’s outer diameter to ease insertion.
Use a seal installation tool or a press to push the seal squarely into the housing bore. Never hammer the seal directly, as this can distort the case or damage the lip. The seal should be seated flush with the housing face or to the specified depth. Lubricate the sealing lip with clean oil before sliding it over the shaft.
After installation, rotate the shaft by hand to verify smooth operation and check for leaks after system pressurization. If a leak persists, inspect the shaft for wear or the seal for damage. Always replace seals when rebuilding hydraulic motors, wheel hubs, or gearboxes.
Aftermarket seals often use lower‑grade rubber that hardens prematurely or has poor oil resistance, leading to leaks within months. The genuine XCMG 860500586 is formulated to meet XCMG’s specific material requirements, ensuring compatibility with the grader’s hydraulic and gear oils. Aftermarket seals may also have incorrect lip geometry or spring tension, causing excessive friction or inadequate sealing.
Counterfeit seals may use a carbon steel spring that rusts, losing tension and causing leaks. The 860500586 uses a stainless steel spring that maintains its elasticity even in wet environments. Additionally, genuine XCMG seals are batch‑tested for dynamic performance, whereas counterfeit products rarely undergo any quality control.
XCMG provides a 12‑month warranty against manufacturing defects. Each seal is packaged in branded XCMG packaging with the part number clearly marked. Using genuine XCMG seals ensures compatibility, reliability, and the protection of your valuable equipment.
Common signs of a failing shaft seal include: visible oil leakage around the shaft, oil stains on the housing exterior, reduced oil level in the reservoir or gearbox, and increased operating temperature due to oil loss. Also, if the seal lip becomes hard or cracked, it will no longer conform to the shaft, allowing leaks.
Preventive replacement is recommended every 4,000 to 5,000 operating hours or whenever the associated component (hydraulic motor, wheel hub, gearbox) is overhauled. The cost of a genuine seal is minimal compared to the cost of a failed bearing or damaged shaft caused by oil starvation or contamination.
During routine maintenance, inspect for oil leaks around shafts. If a leak is detected, replace the seal immediately. Keep a stock of 860500586 seals in your parts inventory for rapid field repairs. A well‑maintained sealing system prevents environmental contamination, reduces oil consumption, and extends component life.
The 860500586 Ruj‑Type Seal is stocked in XCMG regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent repairs. Bulk orders (20+ seals) receive volume discounts and can be shipped via sea freight.
Each seal is individually wrapped in anti‑rust paper and boxed to prevent damage during transit. For large fleets, consignment stock programs are available to ensure immediate availability and reduced downtime. Don’t let a leaking shaft seal compromise your grader’s performance or safety.
Order the genuine XCMG 860500586 Ruj‑Type Seal 50×65×11 today and restore leak‑free operation to your motor grader. The 860500586 seal is a small but vital component in your grader’s hydraulic and drivetrain systems. A single leaking seal can cause oil loss, bearing damage, and costly downtime. Keep spare seals in your service truck for rapid field replacement, and always replace with genuine XCMG components.
Upgrade your motor grader’s reliability with the XCMG genuine seal. Engineered for durability, precision, and leak‑free performance – order now and experience the quality that keeps your grader productive.
