The genuine OEM 803382852 O-Ring 56×3.55 is a precision-molded hydraulic seal designed exclusively for XCMG motor graders. This critical sealing component prevents fluid leakage between mating hydraulic surfaces, ensuring system pressure integrity and contamination control in GR series graders.
Manufactured to original equipment specifications, the 803382852 O-ring features a 56 mm inner diameter and 3.55 mm cross-section, made from premium nitrile rubber (NBR) with a hardness of 70 Shore A. It withstands working pressures up to 35 MPa and operates reliably from -40°C to +120°C.
Using genuine XCMG 803382852 O-rings eliminates external seepage, internal cross-leakage, and premature seal extrusion. Each O-ring undergoes 100% dimensional inspection and material hardness verification before packaging. Upgrade your grader’s sealing reliability with authentic OEM quality.
The 803382852 O-ring 56×3.55 is formulated from premium nitrile rubber with optimized carbon black reinforcement. This compound provides excellent resistance to mineral oil-based hydraulic fluids, diesel fuel, and lubricating greases commonly used in XCMG graders.
The precise 56 mm inner diameter and 3.55 mm cross-section follow ISO 3601-1 class A tolerances, ensuring proper gland fill and compression (15-25% for static seals). This prevents both under-compression (leakage) and over-compression (extrusion or high friction).
Each O-ring is flash-free and molded with a smooth surface finish (Ra ≤ 0.8 μm) to minimize wear on mating metal surfaces. The material exhibits low compression set, maintaining sealing force even after prolonged thermal cycling.
The 803382852 O-ring is used as a static seal in numerous XCMG grader hydraulic components. Typical locations include: flange fittings on hydraulic pumps, valve block to manifold interfaces, return valve block covers, and large-bore hydraulic cylinder end caps.
This seal replaces original part number 803382852 on GR2153, GR200, GR180, GR3005, and GR3505 graders. It is also compatible with older GR135 and GR165 series components that use SAE flange port sealing. Cross-reference aftermarket numbers: 568-250, OR-56-3.55.
Always verify the gland dimensions before installation: groove depth should be 2.8-3.0 mm, groove width 4.5-5.0 mm for optimal sealing. Using the correct O-ring eliminates fluid migration between hydraulic circuits.
Before installing the 803382852 O-ring, inspect the gland for burrs, scratches, or contamination. Lubricate the O-ring and mating surfaces with clean hydraulic oil. Never use sharp tools to seat the O-ring; use rounded plastic picks.
Avoid twisting the O-ring during assembly. Ensure it sits evenly in the groove without pinching. For flange fittings, tighten bolts gradually in a star pattern to manufacturer torque (typically 35-40 Nm). Do not reuse old O-rings – always install new genuine seals.
After assembly, pressurize the system to working pressure and check for external leakage. Re-torque flange bolts after the first heat cycle (50 operating hours) to compensate for O-ring compression relaxation.
All 803382852 O-rings are produced in XCMG’s ISO 9001:2015 and IATF 16949 certified facilities. Each batch undergoes 100% dimensional inspection using laser micrometers. Random samples are tested for hardness (Shore A), tensile strength, and compression set per ASTM D2000.
Fluid compatibility tests include 1000-hour immersion in mineral oil at 100°C with volume swell monitored. Each O-ring is batch traceable with material certification available upon request. XCMG provides a 12-month warranty against material defects.
Aftermarket O-rings often use recycled rubber or incorrect durometer, leading to premature extrusion, swelling, or hardening. Genuine 803382852 O-rings are formulated specifically for XCMG hydraulic systems, validated by thousands of field hours.
Mining operators report that genuine XCMG O-rings last 4-5 times longer than generic seals, with zero leakage incidents between overhauls. Protect your hydraulic system from contamination ingress and pressure loss. Choose safety, choose reliability, choose 803382852.
The 803382852 O-ring is stocked in XCMG regional warehouses across North America, Europe, Asia-Pacific, the Middle East, and Africa. Standard lead time is 3-5 working days. Express shipping available for urgent repairs. Bulk orders (500+ pieces) receive volume discounts.
Each O-ring is individually packed in anti-static bags to prevent dust contamination. XCMG also offers complete seal kits (part number 803382852-KIT) that include this O-ring along with all other seals for a specific grader hydraulic component.
A large infrastructure contractor in Australia replaced all non-genuine O-rings on 18 XCMG GR215 graders with genuine 803382852 seals. After 6,000 operating hours, zero flange fitting leaks were recorded, reducing hydraulic oil consumption by 90% annually.
In Canadian winter operations at -40°C, the 803382852 O-ring maintained flexibility and sealing force, while aftermarket seals hardened and leaked. Operators reported immediate elimination of external weeping from pump mounting flanges.
The 803382852 is standard in NBR 70 Shore A. For special applications requiring higher temperature resistance (up to 200°C), FKM (Viton®) material is available as custom order with a 10-day lead time. HNBR (highly saturated nitrile) for high-abrasion environments is also offered.
Minimum order quantity for custom materials is 100 pieces. XCMG can also supply this O-ring in bulk packs of 100, 500, or 1000 for fleet maintenance programs. Contact our parts team for consignment stock arrangements.
To maximize service life of your 803382852 O-ring, maintain hydraulic oil cleanliness to ISO 4406 code 18/16/13. Change return filters regularly. Inspect O-rings during any component disassembly – replace if you see flat spots, cracks, or hardness changes.
Under normal operating conditions (clean oil, temperatures below 100°C, no over-pressurization), genuine XCMG O-rings provide 8,000-10,000 hours of reliable service. Always keep a stock of 803382852 seals for planned maintenance.
For static flange applications, the 803382852 O-ring is designed with 18-22% compression. The gland’s radial clearance (extrusion gap) must be ≤ 0.15 mm at maximum pressure to prevent nibbling. XCMG’s mating components are machined to these tight tolerances.
If using the 803382852 in a dynamic application (e.g., piston rod seal), maximum pressure should be reduced to 25 MPa and a backup ring may be required. Always consult the XCMG service manual for specific applications.
In summary, OEM number 803382852 represents the gold standard for XCMG motor grader hydraulic sealing. From compound formulation to dimensional precision, every detail meets the highest industry requirements. Never risk oil leaks or system contamination. Order the genuine 803382852 O-Ring 56×3.55 today and experience the XCMG quality advantage.
With proven reliability in thousands of graders worldwide, the 803382852 seal continues to outperform generic alternatives. Ensure zero fluid leakage, consistent system pressure, and extended component life. Choose genuine XCMG for your grader’s hydraulic integrity. Secure your fleet’s performance with OEM authenticity.
