Genuine XCMG Flange with OEM number 803191081 is a precision-engineered split flange component designed for high-pressure hydraulic connections on motor graders. This critical component, 803191081, ensures leak-free operation in pump discharge lines, valve banks, and cylinder ports. Manufactured from forged carbon steel with zinc-nickel plating, it withstands extreme vibration, pressure spikes up to 420 bar, and harsh construction environments.
Engineered for XCMG GR215, GR300, GR350, and GR2405 motor graders, the 803191081 flange conforms to SAE J518 Code 61 standard. Its compact split-flange design with four bolt holes enables quick assembly and disassembly without rotating heavy hoses, ideal for tight engine compartments and field repairs.
By choosing OEM 803191081, maintenance teams eliminate thread galling, reduce assembly time by 50%, and prevent costly fluid leaks. This genuine XCMG flange guarantees perfect port alignment, superior sealing with O-ring, and long-term reliability under continuous heavy-duty operation.
| Parameter | Specification / Value |
|---|---|
| OEM Number | 803191081 |
| Brand | XCMG (Original Genuine Part) |
| Product Type | Split Flange / SAE Flange Connector |
| Flange Size | 3/4″ (Code 61, SAE J518) |
| Material | Forged carbon steel (AISI 1045), zinc-nickel plated (480h salt spray) |
| Bolt Hole Pattern | 4 holes, M10×1.5 threads, 47.6mm center distance |
| Seal Type | Nitrile rubber O-ring (Ø21.95×3.53 mm) |
| Working Pressure | 350 bar (5075 PSI) for Code 61 |
| Burst Pressure | ≥ 1050 bar |
| Temperature Range | -40°C to +120°C |
| Media Compatibility | Mineral oils, synthetic hydraulic fluids, diesel, water-glycol |
| Application Zones | Main pump discharge, valve inlet/outlet, cylinder ports, hydraulic manifolds |
| Compatible Models | XCMG GR165, GR215, GR300, GR350, GR2405, GR1803 |
| Standards | SAE J518, ISO 6162-1, XCMG factory specification |
The XCMG 803191081 flange is produced using closed-die forging, which aligns metal grain flow for maximum strength and fatigue resistance. Zinc-nickel plating provides exceptional corrosion protection, passing 480 hours of salt spray testing (ASTM B117).
Unlike generic machined flanges, this forged component eliminates internal porosity and stress risers. Each flange is 100% pressure-tested at 525 bar and dye-penetrant inspected for surface defects before packaging.
The precision-machined O-ring groove ensures a perfect seal with minimal compression set, even after thousands of thermal cycles.
The 803191081 flange is typically installed on the main hydraulic pump outlet, steering valve supply line, and brake accumulator charge circuit. Its split-flange design allows easy removal of large hoses without rotating the entire assembly, saving time during component replacement.
In the blade lift circuit, this flange connects high-pressure hoses to cylinder ports, withstanding frequent pressure reversals and shock loads. For the circle drive hydraulic motor, it ensures leak-free delivery of high-flow oil (up to 200 L/min).
Using genuine 803191081 eliminates flange distortion and bolt loosening caused by vibration, reducing unplanned downtime in mining and heavy construction.
Before installation, clean the mating surfaces and inspect the O-ring for damage. Lubricate the O-ring with clean hydraulic oil. Position the 803191081 flange over the port, aligning the bolt holes.
Insert four M10×1.5 bolts and tighten evenly in a cross pattern to 40–45 Nm. Do not exceed 50 Nm. Re-torque after the first 50 operating hours and during each hydraulic oil change.
Inspect the flange annually for signs of leakage or bolt loosening. If the O-ring is replaced, use only genuine XCMG part 803191082 to ensure correct durometer and dimensions.
Generic flanges often use low-grade cast iron or machined bar stock with inconsistent hardness. The forged OEM 803191081 provides superior tensile strength (≥ 600 MPa) and impact resistance.
Vibration tests (1.5 million cycles at 40 Hz) show no bolt loosening or flange distortion on genuine fittings, while generic copies develop micro-cracks after 400,000 cycles.
The zinc-nickel plating on OEM flanges resists red rust for over 1,000 hours in cyclic corrosion tests, ensuring reliability in road salt and coastal environments.
Each 803191081 flange is manufactured in XCMG’s ISO 9001:2015 certified forging facility. Random samples undergo tensile, hardness (HRC 22–28), and salt spray testing. Dimensional inspection uses CMM to ensure SAE J518 compliance.
Full traceability from steel heat lot to finished product allows quality audits. XCMG provides a 12-month warranty against manufacturing defects. Rejection rate is below 0.1%.
OEM 803191081 replaces older part numbers 803191080 and 803191079. It is fully compatible with all XCMG GR-series motor graders produced after 2010. For Code 62 (higher pressure) applications, use 803191083.
Order this flange together with O-ring kit 803191082 and bolt set 803191084 for complete installation. Bulk packaging (20 units) available for dealer workshops and fleet maintenance.
Q: Can the 803191081 flange be used with Code 62 systems? A: No, Code 62 has thicker flanges and higher pressure rating. Use 803191083 for Code 62 applications.
Q: What bolt grade is recommended? A: Use grade 10.9 M10×1.5 bolts (XCMG part 803191084). Lower grade bolts may stretch under vibration.
Q: How to detect a leaking flange? A: Look for fluid seepage around the flange joint or O-ring extrusion. Replace the O-ring and re-torque bolts.
Q: Is the flange reusable after disassembly? A: Yes, if the O-ring is in good condition and the flange faces are not scored. Replace the O-ring every third disassembly.
*All specifications based on XCMG engineering standards. OEM 803191081 is the official SAE split flange for GR-series motor graders. No printed contact details or form fields.
